libev代码
就是贴上来：
ev.c:
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4622 4623 4624 4625 4626 4627 4628 4629 4630 4631 4632 4633 4634 4635 4636 4637 4638 4639 4640 4641 4642 4643 4644 4645 4646 4647 4648 4649 4650 4651 4652 4653 4654 4655 4656 4657 4658 4659 4660 4661 4662 4663 4664 4665 4666 4667 4668 4669 4670 4671 4672 4673 4674 4675 4676 4677 4678 4679 4680 4681 4682 4683 4684 4685 4686 4687 4688 4689 4690 4691 4692 4693 4694 4695 4696 4697 4698 4699 4700 4701 4702 4703 4704 4705 4706 4707 4708 4709 4710 4711 4712 4713 4714 4715 4716 4717 4718 4719 4720 4721 4722 4723 4724 4725 4726 4727 4728 4729 4730 4731 4732 4733 4734 4735 4736 4737 4738 4739 4740 4741 4742 4743 4744 4745 4746 4747 4748 4749 4750 4751 4752 4753 4754 4755 4756 4757 4758 4759 4760 4761 4762 4763 4764 4765 4766 4767 | /* * libev event processing core, watcher management *//* this big block deduces configuration from config.h */#ifndef EV_STANDALONE# ifdef EV_CONFIG_H# include EV_CONFIG_H# else# include "config.h"# endif#if HAVE_FLOOR# ifndef EV_USE_FLOOR# define EV_USE_FLOOR 1# endif#endif# if HAVE_CLOCK_SYSCALL# ifndef EV_USE_CLOCK_SYSCALL# define EV_USE_CLOCK_SYSCALL 1# ifndef EV_USE_REALTIME# define EV_USE_REALTIME 0# endif# ifndef EV_USE_MONOTONIC# define EV_USE_MONOTONIC 1# endif# endif# elif !defined EV_USE_CLOCK_SYSCALL# define EV_USE_CLOCK_SYSCALL 0# endif# if HAVE_CLOCK_GETTIME# ifndef EV_USE_MONOTONIC# define EV_USE_MONOTONIC 1# endif# ifndef EV_USE_REALTIME# define EV_USE_REALTIME 0# endif# else# ifndef EV_USE_MONOTONIC# define EV_USE_MONOTONIC 0# endif# ifndef EV_USE_REALTIME# define EV_USE_REALTIME 0# endif# endif# if HAVE_NANOSLEEP# ifndef EV_USE_NANOSLEEP# define EV_USE_NANOSLEEP EV_FEATURE_OS# endif# else# undef EV_USE_NANOSLEEP# define EV_USE_NANOSLEEP 0# endif# if HAVE_SELECT && HAVE_SYS_SELECT_H# ifndef EV_USE_SELECT# define EV_USE_SELECT EV_FEATURE_BACKENDS# endif# else# undef EV_USE_SELECT# define EV_USE_SELECT 0# endif# if HAVE_POLL && HAVE_POLL_H# ifndef EV_USE_POLL# define EV_USE_POLL EV_FEATURE_BACKENDS# endif# else# undef EV_USE_POLL# define EV_USE_POLL 0# endif # if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H# ifndef EV_USE_EPOLL# define EV_USE_EPOLL EV_FEATURE_BACKENDS# endif# else# undef EV_USE_EPOLL# define EV_USE_EPOLL 0# endif # if HAVE_KQUEUE && HAVE_SYS_EVENT_H# ifndef EV_USE_KQUEUE# define EV_USE_KQUEUE EV_FEATURE_BACKENDS# endif# else# undef EV_USE_KQUEUE# define EV_USE_KQUEUE 0# endif # if HAVE_PORT_H && HAVE_PORT_CREATE# ifndef EV_USE_PORT# define EV_USE_PORT EV_FEATURE_BACKENDS# endif# else# undef EV_USE_PORT# define EV_USE_PORT 0# endif# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H# ifndef EV_USE_INOTIFY# define EV_USE_INOTIFY EV_FEATURE_OS# endif# else# undef EV_USE_INOTIFY# define EV_USE_INOTIFY 0# endif# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H# ifndef EV_USE_SIGNALFD# define EV_USE_SIGNALFD EV_FEATURE_OS# endif# else# undef EV_USE_SIGNALFD# define EV_USE_SIGNALFD 0# endif# if HAVE_EVENTFD# ifndef EV_USE_EVENTFD# define EV_USE_EVENTFD EV_FEATURE_OS# endif# else# undef EV_USE_EVENTFD# define EV_USE_EVENTFD 0# endif #endif#include <stdlib.h>#include <string.h>#include <fcntl.h>#include <stddef.h>#include <stdio.h>#include <assert.h>#include <errno.h>#include <sys/types.h>#include <time.h>#include <limits.h>#include <signal.h>#ifdef EV_H# include EV_H#else# include "ev.h"#endif#if EV_NO_THREADS# undef EV_NO_SMP# define EV_NO_SMP 1# undef ECB_NO_THREADS# define ECB_NO_THREADS 1#endif#if EV_NO_SMP# undef EV_NO_SMP# define ECB_NO_SMP 1#endif#ifndef _WIN32# include <sys/time.h># include <sys/wait.h># include <unistd.h>#else# include <io.h># define WIN32_LEAN_AND_MEAN# include <winsock2.h># include <windows.h># ifndef EV_SELECT_IS_WINSOCKET# define EV_SELECT_IS_WINSOCKET 1# endif# undef EV_AVOID_STDIO#endif/* OS X, in its infinite idiocy, actually HARDCODES * a limit of 1024 into their select. Where people have brains, * OS X engineers apparently have a vacuum. Or maybe they were * ordered to have a vacuum, or they do anything for money. * This might help. Or not. */#define _DARWIN_UNLIMITED_SELECT 1/* this block tries to deduce configuration from header-defined symbols and defaults *//* try to deduce the maximum number of signals on this platform */#if defined EV_NSIG/* use what's provided */#elif defined NSIG# define EV_NSIG (NSIG)#elif defined _NSIG# define EV_NSIG (_NSIG)#elif defined SIGMAX# define EV_NSIG (SIGMAX+1)#elif defined SIG_MAX# define EV_NSIG (SIG_MAX+1)#elif defined _SIG_MAX# define EV_NSIG (_SIG_MAX+1)#elif defined MAXSIG# define EV_NSIG (MAXSIG+1)#elif defined MAX_SIG# define EV_NSIG (MAX_SIG+1)#elif defined SIGARRAYSIZE# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */#elif defined _sys_nsig# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */#else# error "unable to find value for NSIG, please report"/* to make it compile regardless, just remove the above line, *//* but consider reporting it, too! :) */# define EV_NSIG 65#endif#ifndef EV_USE_FLOOR# define EV_USE_FLOOR 0#endif#ifndef EV_USE_CLOCK_SYSCALL# if __linux && __GLIBC__ >= 2# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS# else# define EV_USE_CLOCK_SYSCALL 0# endif#endif#ifndef EV_USE_MONOTONIC# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0# define EV_USE_MONOTONIC EV_FEATURE_OS# else# define EV_USE_MONOTONIC 0# endif#endif#ifndef EV_USE_REALTIME# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL#endif#ifndef EV_USE_NANOSLEEP# if _POSIX_C_SOURCE >= 199309L# define EV_USE_NANOSLEEP EV_FEATURE_OS# else# define EV_USE_NANOSLEEP 0# endif#endif#ifndef EV_USE_SELECT# define EV_USE_SELECT EV_FEATURE_BACKENDS#endif#ifndef EV_USE_POLL# ifdef _WIN32# define EV_USE_POLL 0# else# define EV_USE_POLL EV_FEATURE_BACKENDS# endif#endif#ifndef EV_USE_EPOLL# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))# define EV_USE_EPOLL EV_FEATURE_BACKENDS# else# define EV_USE_EPOLL 0# endif#endif#ifndef EV_USE_KQUEUE# define EV_USE_KQUEUE 0#endif#ifndef EV_USE_PORT# define EV_USE_PORT 0#endif#ifndef EV_USE_INOTIFY# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))# define EV_USE_INOTIFY EV_FEATURE_OS# else# define EV_USE_INOTIFY 0# endif#endif#ifndef EV_PID_HASHSIZE# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1#endif#ifndef EV_INOTIFY_HASHSIZE# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1#endif#ifndef EV_USE_EVENTFD# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))# define EV_USE_EVENTFD EV_FEATURE_OS# else# define EV_USE_EVENTFD 0# endif#endif#ifndef EV_USE_SIGNALFD# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))# define EV_USE_SIGNALFD EV_FEATURE_OS# else# define EV_USE_SIGNALFD 0# endif#endif#if 0 /* debugging */# define EV_VERIFY 3# define EV_USE_4HEAP 1# define EV_HEAP_CACHE_AT 1#endif#ifndef EV_VERIFY# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)#endif#ifndef EV_USE_4HEAP# define EV_USE_4HEAP EV_FEATURE_DATA#endif#ifndef EV_HEAP_CACHE_AT# define EV_HEAP_CACHE_AT EV_FEATURE_DATA#endif#ifdef ANDROID/* supposedly, android doesn't typedef fd_mask */# undef EV_USE_SELECT# define EV_USE_SELECT 0/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */# undef EV_USE_CLOCK_SYSCALL# define EV_USE_CLOCK_SYSCALL 0#endif/* aix's poll.h seems to cause lots of trouble */#ifdef _AIX/* AIX has a completely broken poll.h header */# undef EV_USE_POLL# define EV_USE_POLL 0#endif/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, *//* which makes programs even slower. might work on other unices, too. */#if EV_USE_CLOCK_SYSCALL# include <sys/syscall.h># ifdef SYS_clock_gettime# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))# undef EV_USE_MONOTONIC# define EV_USE_MONOTONIC 1# else# undef EV_USE_CLOCK_SYSCALL# define EV_USE_CLOCK_SYSCALL 0# endif#endif/* this block fixes any misconfiguration where we know we run into trouble otherwise */#ifndef CLOCK_MONOTONIC# undef EV_USE_MONOTONIC# define EV_USE_MONOTONIC 0#endif#ifndef CLOCK_REALTIME# undef EV_USE_REALTIME# define EV_USE_REALTIME 0#endif#if !EV_STAT_ENABLE# undef EV_USE_INOTIFY# define EV_USE_INOTIFY 0#endif#if !EV_USE_NANOSLEEP/* hp-ux has it in sys/time.h, which we unconditionally include above */# if !defined _WIN32 && !defined __hpux# include <sys/select.h># endif#endif#if EV_USE_INOTIFY# include <sys/statfs.h># include <sys/inotify.h>/* some very old inotify.h headers don't have IN_DONT_FOLLOW */# ifndef IN_DONT_FOLLOW# undef EV_USE_INOTIFY# define EV_USE_INOTIFY 0# endif#endif#if EV_USE_EVENTFD/* our minimum requirement is glibc 2.7 which has the stub, but not the header */# include <stdint.h># ifndef EFD_NONBLOCK# define EFD_NONBLOCK O_NONBLOCK# endif# ifndef EFD_CLOEXEC# ifdef O_CLOEXEC# define EFD_CLOEXEC O_CLOEXEC# else# define EFD_CLOEXEC 02000000# endif# endifEV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);#endif#if EV_USE_SIGNALFD/* our minimum requirement is glibc 2.7 which has the stub, but not the header */# include <stdint.h># ifndef SFD_NONBLOCK# define SFD_NONBLOCK O_NONBLOCK# endif# ifndef SFD_CLOEXEC# ifdef O_CLOEXEC# define SFD_CLOEXEC O_CLOEXEC# else# define SFD_CLOEXEC 02000000# endif# endifEV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);struct signalfd_siginfo{ uint32_t ssi_signo; char pad[128 - sizeof (uint32_t)];};#endif/**/#if EV_VERIFY >= 3# define EV_FREQUENT_CHECK ev_verify (EV_A)#else# define EV_FREQUENT_CHECK do { } while (0)#endif/* * This is used to work around floating point rounding problems. * This value is good at least till the year 4000. */#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 *//*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy *//* ECB.H BEGIN *//* * libecb - http://software.schmorp.de/pkg/libecb * * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de> * Copyright (©) 2011 Emanuele Giaquinta * All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. */#ifndef ECB_H#define ECB_H/* 16 bits major, 16 bits minor */#define ECB_VERSION 0x00010003#ifdef _WIN32 typedef signed char int8_t; typedef unsigned char uint8_t; typedef signed short int16_t; typedef unsigned short uint16_t; typedef signed int int32_t; typedef unsigned int uint32_t; #if __GNUC__ typedef signed long long int64_t; typedef unsigned long long uint64_t; #else /* _MSC_VER || __BORLANDC__ */ typedef signed __int64 int64_t; typedef unsigned __int64 uint64_t; #endif #ifdef _WIN64 #define ECB_PTRSIZE 8 typedef uint64_t uintptr_t; typedef int64_t intptr_t; #else #define ECB_PTRSIZE 4 typedef uint32_t uintptr_t; typedef int32_t intptr_t; #endif#else #include <inttypes.h> #if UINTMAX_MAX > 0xffffffffU #define ECB_PTRSIZE 8 #else #define ECB_PTRSIZE 4 #endif#endif/* work around x32 idiocy by defining proper macros */#if __x86_64 || _M_AMD64 #if __ILP32 #define ECB_AMD64_X32 1 #else #define ECB_AMD64 1 #endif#endif/* many compilers define _GNUC_ to some versions but then only implement * what their idiot authors think are the "more important" extensions, * causing enormous grief in return for some better fake benchmark numbers. * or so. * we try to detect these and simply assume they are not gcc - if they have * an issue with that they should have done it right in the first place. */#ifndef ECB_GCC_VERSION #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__ #define ECB_GCC_VERSION(major,minor) 0 #else #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) #endif#endif#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */#define ECB_C99 (__STDC_VERSION__ >= 199901L)#define ECB_C11 (__STDC_VERSION__ >= 201112L)#define ECB_CPP (__cplusplus+0)#define ECB_CPP11 (__cplusplus >= 201103L)#if ECB_CPP #define ECB_EXTERN_C extern "C" #define ECB_EXTERN_C_BEG ECB_EXTERN_C { #define ECB_EXTERN_C_END }#else #define ECB_EXTERN_C extern #define ECB_EXTERN_C_BEG #define ECB_EXTERN_C_END#endif/*****************************************************************************//* ECB_NO_THREADS - ecb is not used by multiple threads, ever *//* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */#if ECB_NO_THREADS #define ECB_NO_SMP 1#endif#if ECB_NO_SMP #define ECB_MEMORY_FENCE do { } while (0)#endif#ifndef ECB_MEMORY_FENCE #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 #if __i386 || __i386__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") #elif __amd64 || __amd64__ || __x86_64 || __x86_64__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \ || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") #elif __sparc || __sparc__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") #elif defined __s390__ || defined __s390x__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") #elif defined __mips__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") #elif defined __alpha__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory") #elif defined __hppa__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") #elif defined __ia64__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory") #endif #endif#endif#ifndef ECB_MEMORY_FENCE #if ECB_GCC_VERSION(4,7) /* see comment below (stdatomic.h) about the C11 memory model. */ #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) /* The __has_feature syntax from clang is so misdesigned that we cannot use it * without risking compile time errors with other compilers. We *could* * define our own ecb_clang_has_feature, but I just can't be bothered to work * around this shit time and again. * #elif defined __clang && __has_feature (cxx_atomic) * // see comment below (stdatomic.h) about the C11 memory model. * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) */ #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ #define ECB_MEMORY_FENCE __sync_synchronize () #elif _MSC_VER >= 1400 /* VC++ 2005 */ #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) #define ECB_MEMORY_FENCE _ReadWriteBarrier () #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () #elif defined _WIN32 #include <WinNT.h> #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */ #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 #include <mbarrier.h> #define ECB_MEMORY_FENCE __machine_rw_barrier () #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier () #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier () #elif __xlC__ #define ECB_MEMORY_FENCE __sync () #endif#endif#ifndef ECB_MEMORY_FENCE #if ECB_C11 && !defined __STDC_NO_ATOMICS__ /* we assume that these memory fences work on all variables/all memory accesses, */ /* not just C11 atomics and atomic accesses */ #include <stdatomic.h> /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */ /* any fence other than seq_cst, which isn't very efficient for us. */ /* Why that is, we don't know - either the C11 memory model is quite useless */ /* for most usages, or gcc and clang have a bug */ /* I *currently* lean towards the latter, and inefficiently implement */ /* all three of ecb's fences as a seq_cst fence */ #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst) #endif#endif#ifndef ECB_MEMORY_FENCE #if !ECB_AVOID_PTHREADS /* * if you get undefined symbol references to pthread_mutex_lock, * or failure to find pthread.h, then you should implement * the ECB_MEMORY_FENCE operations for your cpu/compiler * OR provide pthread.h and link against the posix thread library * of your system. */ #include <pthread.h> #define ECB_NEEDS_PTHREADS 1 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER; #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0) #endif#endif#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE#endif#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE#endif/*****************************************************************************/#if __cplusplus #define ecb_inline static inline#elif ECB_GCC_VERSION(2,5) #define ecb_inline static __inline__#elif ECB_C99 #define ecb_inline static inline#else #define ecb_inline static#endif#if ECB_GCC_VERSION(3,3) #define ecb_restrict __restrict__#elif ECB_C99 #define ecb_restrict restrict#else #define ecb_restrict#endiftypedef int ecb_bool;#define ECB_CONCAT_(a, b) a ## b#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)#define ECB_STRINGIFY_(a) # a#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)#define ecb_function_ ecb_inline#if ECB_GCC_VERSION(3,1) #define ecb_attribute(attrlist) __attribute__(attrlist) #define ecb_is_constant(expr) __builtin_constant_p (expr) #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)#else #define ecb_attribute(attrlist) #define ecb_is_constant(expr) 0 #define ecb_expect(expr,value) (expr) #define ecb_prefetch(addr,rw,locality)#endif/* no emulation for ecb_decltype */#if ECB_GCC_VERSION(4,5) #define ecb_decltype(x) __decltype(x)#elif ECB_GCC_VERSION(3,0) #define ecb_decltype(x) __typeof(x)#endif#define ecb_noinline ecb_attribute ((__noinline__))#define ecb_unused ecb_attribute ((__unused__))#define ecb_const ecb_attribute ((__const__))#define ecb_pure ecb_attribute ((__pure__))#if ECB_C11 #define ecb_noreturn _Noreturn#else #define ecb_noreturn ecb_attribute ((__noreturn__))#endif#if ECB_GCC_VERSION(4,3) #define ecb_artificial ecb_attribute ((__artificial__)) #define ecb_hot ecb_attribute ((__hot__)) #define ecb_cold ecb_attribute ((__cold__))#else #define ecb_artificial #define ecb_hot #define ecb_cold#endif/* put around conditional expressions if you are very sure that the *//* expression is mostly true or mostly false. note that these return *//* booleans, not the expression. */#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)/* for compatibility to the rest of the world */#define ecb_likely(expr) ecb_expect_true (expr)#define ecb_unlikely(expr) ecb_expect_false (expr)/* count trailing zero bits and count # of one bits */#if ECB_GCC_VERSION(3,4) /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */ #define ecb_ld32(x) (__builtin_clz (x) ^ 31) #define ecb_ld64(x) (__builtin_clzll (x) ^ 63) #define ecb_ctz32(x) __builtin_ctz (x) #define ecb_ctz64(x) __builtin_ctzll (x) #define ecb_popcount32(x) __builtin_popcount (x) /* no popcountll */#else ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const; ecb_function_ int ecb_ctz32 (uint32_t x) { int r = 0; x &= ~x + 1; /* this isolates the lowest bit */#if ECB_branchless_on_i386 r += !!(x & 0xaaaaaaaa) << 0; r += !!(x & 0xcccccccc) << 1; r += !!(x & 0xf0f0f0f0) << 2; r += !!(x & 0xff00ff00) << 3; r += !!(x & 0xffff0000) << 4;#else if (x & 0xaaaaaaaa) r += 1; if (x & 0xcccccccc) r += 2; if (x & 0xf0f0f0f0) r += 4; if (x & 0xff00ff00) r += 8; if (x & 0xffff0000) r += 16;#endif return r; } ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const; ecb_function_ int ecb_ctz64 (uint64_t x) { int shift = x & 0xffffffffU ? 0 : 32; return ecb_ctz32 (x >> shift) + shift; } ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const; ecb_function_ int ecb_popcount32 (uint32_t x) { x -= (x >> 1) & 0x55555555; x = ((x >> 2) & 0x33333333) + (x & 0x33333333); x = ((x >> 4) + x) & 0x0f0f0f0f; x *= 0x01010101; return x >> 24; } ecb_function_ int ecb_ld32 (uint32_t x) ecb_const; ecb_function_ int ecb_ld32 (uint32_t x) { int r = 0; if (x >> 16) { x >>= 16; r += 16; } if (x >> 8) { x >>= 8; r += 8; } if (x >> 4) { x >>= 4; r += 4; } if (x >> 2) { x >>= 2; r += 2; } if (x >> 1) { r += 1; } return r; } ecb_function_ int ecb_ld64 (uint64_t x) ecb_const; ecb_function_ int ecb_ld64 (uint64_t x) { int r = 0; if (x >> 32) { x >>= 32; r += 32; } return r + ecb_ld32 (x); }#endifecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;ecb_function_ uint8_t ecb_bitrev8 (uint8_t x){ return ( (x * 0x0802U & 0x22110U) | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; }ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;ecb_function_ uint16_t ecb_bitrev16 (uint16_t x){ x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1); x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2); x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4); x = ( x >> 8 ) | ( x << 8); return x;}ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;ecb_function_ uint32_t ecb_bitrev32 (uint32_t x){ x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1); x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2); x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4); x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8); x = ( x >> 16 ) | ( x << 16); return x;}/* popcount64 is only available on 64 bit cpus as gcc builtin *//* so for this version we are lazy */ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;ecb_function_ intecb_popcount64 (uint64_t x){ return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);}ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }#if ECB_GCC_VERSION(4,3) #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) #define ecb_bswap32(x) __builtin_bswap32 (x) #define ecb_bswap64(x) __builtin_bswap64 (x)#else ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const; ecb_function_ uint16_t ecb_bswap16 (uint16_t x) { return ecb_rotl16 (x, 8); } ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const; ecb_function_ uint32_t ecb_bswap32 (uint32_t x) { return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16); } ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const; ecb_function_ uint64_t ecb_bswap64 (uint64_t x) { return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); }#endif#if ECB_GCC_VERSION(4,5) #define ecb_unreachable() __builtin_unreachable ()#else /* this seems to work fine, but gcc always emits a warning for it :/ */ ecb_inline void ecb_unreachable (void) ecb_noreturn; ecb_inline void ecb_unreachable (void) { }#endif/* try to tell the compiler that some condition is definitely true */#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;ecb_inline unsigned charecb_byteorder_helper (void){ /* the union code still generates code under pressure in gcc, */ /* but less than using pointers, and always seems to */ /* successfully return a constant. */ /* the reason why we have this horrible preprocessor mess */ /* is to avoid it in all cases, at least on common architectures */ /* or when using a recent enough gcc version (>= 4.6) */#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64 return 0x44;#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ return 0x44;#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ return 0x11;#else union { uint32_t i; uint8_t c; } u = { 0x11223344 }; return u.c;#endif}ecb_inline ecb_bool ecb_big_endian (void) ecb_const;ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }ecb_inline ecb_bool ecb_little_endian (void) ecb_const;ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }#if ECB_GCC_VERSION(3,0) || ECB_C99 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))#else #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))#endif#if __cplusplus template<typename T> static inline T ecb_div_rd (T val, T div) { return val < 0 ? - ((-val + div - 1) / div) : (val ) / div; } template<typename T> static inline T ecb_div_ru (T val, T div) { return val < 0 ? - ((-val ) / div) : (val + div - 1) / div; }#else #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div)) #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))#endif#if ecb_cplusplus_does_not_suck /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */ template<typename T, int N> static inline int ecb_array_length (const T (&arr)[N]) { return N; }#else #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))#endif/*******************************************************************************//* floating point stuff, can be disabled by defining ECB_NO_LIBM *//* basically, everything uses "ieee pure-endian" floating point numbers *//* the only noteworthy exception is ancient armle, which uses order 43218765 */#if 0 \ || __i386 || __i386__ \ || __amd64 || __amd64__ || __x86_64 || __x86_64__ \ || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ || defined __arm__ && defined __ARM_EABI__ \ || defined __s390__ || defined __s390x__ \ || defined __mips__ \ || defined __alpha__ \ || defined __hppa__ \ || defined __ia64__ \ || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 #define ECB_STDFP 1 #include <string.h> /* for memcpy */#else #define ECB_STDFP 0 #include <math.h> /* for frexp*, ldexp* */#endif#ifndef ECB_NO_LIBM /* convert a float to ieee single/binary32 */ ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const; ecb_function_ uint32_t ecb_float_to_binary32 (float x) { uint32_t r; #if ECB_STDFP memcpy (&r, &x, 4); #else /* slow emulation, works for anything but -0 */ uint32_t m; int e; if (x == 0e0f ) return 0x00000000U; if (x > +3.40282346638528860e+38f) return 0x7f800000U; if (x < -3.40282346638528860e+38f) return 0xff800000U; if (x != x ) return 0x7fbfffffU; m = frexpf (x, &e) * 0x1000000U; r = m & 0x80000000U; if (r) m = -m; if (e <= -126) { m &= 0xffffffU; m >>= (-125 - e); e = -126; } r |= (e + 126) << 23; r |= m & 0x7fffffU; #endif return r; } /* converts an ieee single/binary32 to a float */ ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const; ecb_function_ float ecb_binary32_to_float (uint32_t x) { float r; #if ECB_STDFP memcpy (&r, &x, 4); #else /* emulation, only works for normals and subnormals and +0 */ int neg = x >> 31; int e = (x >> 23) & 0xffU; x &= 0x7fffffU; if (e) x |= 0x800000U; else e = 1; /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */ r = ldexpf (x * (0.5f / 0x800000U), e - 126); r = neg ? -r : r; #endif return r; } /* convert a double to ieee double/binary64 */ ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const; ecb_function_ uint64_t ecb_double_to_binary64 (double x) { uint64_t r; #if ECB_STDFP memcpy (&r, &x, 8); #else /* slow emulation, works for anything but -0 */ uint64_t m; int e; if (x == 0e0 ) return 0x0000000000000000U; if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U; if (x < -1.79769313486231470e+308) return 0xfff0000000000000U; if (x != x ) return 0X7ff7ffffffffffffU; m = frexp (x, &e) * 0x20000000000000U; r = m & 0x8000000000000000;; if (r) m = -m; if (e <= -1022) { m &= 0x1fffffffffffffU; m >>= (-1021 - e); e = -1022; } r |= ((uint64_t)(e + 1022)) << 52; r |= m & 0xfffffffffffffU; #endif return r; } /* converts an ieee double/binary64 to a double */ ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const; ecb_function_ double ecb_binary64_to_double (uint64_t x) { double r; #if ECB_STDFP memcpy (&r, &x, 8); #else /* emulation, only works for normals and subnormals and +0 */ int neg = x >> 63; int e = (x >> 52) & 0x7ffU; x &= 0xfffffffffffffU; if (e) x |= 0x10000000000000U; else e = 1; /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */ r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022); r = neg ? -r : r; #endif return r; }#endif#endif/* ECB.H END */#if ECB_MEMORY_FENCE_NEEDS_PTHREADS/* if your architecture doesn't need memory fences, e.g. because it is * single-cpu/core, or if you use libev in a project that doesn't use libev * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling * libev, in which cases the memory fences become nops. * alternatively, you can remove this #error and link against libpthread, * which will then provide the memory fences. */# error "memory fences not defined for your architecture, please report"#endif#ifndef ECB_MEMORY_FENCE# define ECB_MEMORY_FENCE do { } while (0)# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE#endif#define expect_false(cond) ecb_expect_false (cond)#define expect_true(cond) ecb_expect_true (cond)#define noinline ecb_noinline#define inline_size ecb_inline#if EV_FEATURE_CODE# define inline_speed ecb_inline#else# define inline_speed static noinline#endif#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)#if EV_MINPRI == EV_MAXPRI# define ABSPRI(w) (((W)w), 0)#else# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)#endif#define EMPTY /* required for microsofts broken pseudo-c compiler */#define EMPTY2(a,b) /* used to suppress some warnings */typedef ev_watcher *W;typedef ev_watcher_list *WL;typedef ev_watcher_time *WT;#define ev_active(w) ((W)(w))->active#define ev_at(w) ((WT)(w))->at#if EV_USE_REALTIME/* sig_atomic_t is used to avoid per-thread variables or locking but still *//* giving it a reasonably high chance of working on typical architectures */static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */#endif#if EV_USE_MONOTONICstatic EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */#endif#ifndef EV_FD_TO_WIN32_HANDLE# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)#endif#ifndef EV_WIN32_HANDLE_TO_FD# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)#endif#ifndef EV_WIN32_CLOSE_FD# define EV_WIN32_CLOSE_FD(fd) close (fd)#endif#ifdef _WIN32# include "ev_win32.c"#endif/*****************************************************************************//* define a suitable floor function (only used by periodics atm) */#if EV_USE_FLOOR# include <math.h># define ev_floor(v) floor (v)#else#include <float.h>/* a floor() replacement function, should be independent of ev_tstamp type */static ev_tstamp noinlineev_floor (ev_tstamp v){ /* the choice of shift factor is not terribly important */#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */ const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;#else const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;#endif /* argument too large for an unsigned long? */ if (expect_false (v >= shift)) { ev_tstamp f; if (v == v - 1.) return v; /* very large number */ f = shift * ev_floor (v * (1. / shift)); return f + ev_floor (v - f); } /* special treatment for negative args? */ if (expect_false (v < 0.)) { ev_tstamp f = -ev_floor (-v); return f - (f == v ? 0 : 1); } /* fits into an unsigned long */ return (unsigned long)v;}#endif/*****************************************************************************/#ifdef __linux# include <sys/utsname.h>#endifstatic unsigned int noinline ecb_coldev_linux_version (void){#ifdef __linux unsigned int v = 0; struct utsname buf; int i; char *p = buf.release; if (uname (&buf)) return 0; for (i = 3+1; --i; ) { unsigned int c = 0; for (;;) { if (*p >= '0' && *p <= '9') c = c * 10 + *p++ - '0'; else { p += *p == '.'; break; } } v = (v << 8) | c; } return v;#else return 0;#endif}/*****************************************************************************/#if EV_AVOID_STDIOstatic void noinline ecb_coldev_printerr (const char *msg){ write (STDERR_FILENO, msg, strlen (msg));}#endifstatic void (*syserr_cb)(const char *msg) EV_THROW;void ecb_coldev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW{ syserr_cb = cb;}static void noinline ecb_coldev_syserr (const char *msg){ if (!msg) msg = "(libev) system error"; if (syserr_cb) syserr_cb (msg); else {#if EV_AVOID_STDIO ev_printerr (msg); ev_printerr (": "); ev_printerr (strerror (errno)); ev_printerr ("\n");#else perror (msg);#endif abort (); }}static void *ev_realloc_emul (void *ptr, long size) EV_THROW{ /* some systems, notably openbsd and darwin, fail to properly * implement realloc (x, 0) (as required by both ansi c-89 and * the single unix specification, so work around them here. * recently, also (at least) fedora and debian started breaking it, * despite documenting it otherwise. */ if (size) return realloc (ptr, size); free (ptr); return 0;}static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;void ecb_coldev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW{ alloc = cb;}inline_speed void *ev_realloc (void *ptr, long size){ ptr = alloc (ptr, size); if (!ptr && size) {#if EV_AVOID_STDIO ev_printerr ("(libev) memory allocation failed, aborting.\n");#else fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);#endif abort (); } return ptr;}#define ev_malloc(size) ev_realloc (0, (size))#define ev_free(ptr) ev_realloc ((ptr), 0)/*****************************************************************************//* set in reify when reification needed */#define EV_ANFD_REIFY 1/* file descriptor info structure */typedef struct{ WL head; unsigned char events; /* the events watched for */ unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */ unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ unsigned char unused;#if EV_USE_EPOLL unsigned int egen; /* generation counter to counter epoll bugs */#endif#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP SOCKET handle;#endif#if EV_USE_IOCP OVERLAPPED or, ow;#endif} ANFD;/* stores the pending event set for a given watcher */typedef struct{ W w; int events; /* the pending event set for the given watcher */} ANPENDING;#if EV_USE_INOTIFY/* hash table entry per inotify-id */typedef struct{ WL head;} ANFS;#endif/* Heap Entry */#if EV_HEAP_CACHE_AT /* a heap element */ typedef struct { ev_tstamp at; WT w; } ANHE; #define ANHE_w(he) (he).w /* access watcher, read-write */ #define ANHE_at(he) (he).at /* access cached at, read-only */ #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */#else /* a heap element */ typedef WT ANHE; #define ANHE_w(he) (he) #define ANHE_at(he) (he)->at #define ANHE_at_cache(he)#endif#if EV_MULTIPLICITY struct ev_loop { ev_tstamp ev_rt_now; #define ev_rt_now ((loop)->ev_rt_now) #define VAR(name,decl) decl; #include "ev_vars.h" #undef VAR }; #include "ev_wrap.h" static struct ev_loop default_loop_struct; EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */#else EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */ #define VAR(name,decl) static decl; #include "ev_vars.h" #undef VAR static int ev_default_loop_ptr;#endif#if EV_FEATURE_API# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)# define EV_INVOKE_PENDING invoke_cb (EV_A)#else# define EV_RELEASE_CB (void)0# define EV_ACQUIRE_CB (void)0# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)#endif#define EVBREAK_RECURSE 0x80/*****************************************************************************/#ifndef EV_HAVE_EV_TIMEev_tstampev_time (void) EV_THROW{#if EV_USE_REALTIME if (expect_true (have_realtime)) { struct timespec ts; clock_gettime (CLOCK_REALTIME, &ts); return ts.tv_sec + ts.tv_nsec * 1e-9; }#endif struct timeval tv; gettimeofday (&tv, 0); return tv.tv_sec + tv.tv_usec * 1e-6;}#endifinline_size ev_tstampget_clock (void){#if EV_USE_MONOTONIC if (expect_true (have_monotonic)) { struct timespec ts; clock_gettime (CLOCK_MONOTONIC, &ts); return ts.tv_sec + ts.tv_nsec * 1e-9; }#endif return ev_time ();}#if EV_MULTIPLICITYev_tstampev_now (EV_P) EV_THROW{ return ev_rt_now;}#endifvoidev_sleep (ev_tstamp delay) EV_THROW{ if (delay > 0.) {#if EV_USE_NANOSLEEP struct timespec ts; EV_TS_SET (ts, delay); nanosleep (&ts, 0);#elif defined _WIN32 Sleep ((unsigned long)(delay * 1e3));#else struct timeval tv; /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ /* something not guaranteed by newer posix versions, but guaranteed */ /* by older ones */ EV_TV_SET (tv, delay); select (0, 0, 0, 0, &tv);#endif }}/*****************************************************************************/#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs *//* find a suitable new size for the given array, *//* hopefully by rounding to a nice-to-malloc size */inline_size intarray_nextsize (int elem, int cur, int cnt){ int ncur = cur + 1; do ncur <<= 1; while (cnt > ncur); /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */ if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) { ncur *= elem; ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); ncur = ncur - sizeof (void *) * 4; ncur /= elem; } return ncur;}static void * noinline ecb_coldarray_realloc (int elem, void *base, int *cur, int cnt){ *cur = array_nextsize (elem, *cur, cnt); return ev_realloc (base, elem * *cur);}#define array_init_zero(base,count) \ memset ((void *)(base), 0, sizeof (*(base)) * (count))#define array_needsize(type,base,cur,cnt,init) \ if (expect_false ((cnt) > (cur))) \ { \ int ecb_unused ocur_ = (cur); \ (base) = (type *)array_realloc \ (sizeof (type), (base), &(cur), (cnt)); \ init ((base) + (ocur_), (cur) - ocur_); \ }#if 0#define array_slim(type,stem) \ if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ { \ stem ## max = array_roundsize (stem ## cnt >> 1); \ base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ }#endif#define array_free(stem, idx) \ ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0/*****************************************************************************//* dummy callback for pending events */static void noinlinependingcb (EV_P_ ev_prepare *w, int revents){}void noinlineev_feed_event (EV_P_ void *w, int revents) EV_THROW{ W w_ = (W)w; int pri = ABSPRI (w_); if (expect_false (w_->pending)) pendings [pri][w_->pending - 1].events |= revents; else { w_->pending = ++pendingcnt [pri]; array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); pendings [pri][w_->pending - 1].w = w_; pendings [pri][w_->pending - 1].events = revents; } pendingpri = NUMPRI - 1;}inline_speed voidfeed_reverse (EV_P_ W w){ array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2); rfeeds [rfeedcnt++] = w;}inline_size voidfeed_reverse_done (EV_P_ int revents){ do ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents); while (rfeedcnt);}inline_speed voidqueue_events (EV_P_ W *events, int eventcnt, int type){ int i; for (i = 0; i < eventcnt; ++i) ev_feed_event (EV_A_ events [i], type);}/*****************************************************************************/inline_speed voidfd_event_nocheck (EV_P_ int fd, int revents){ ANFD *anfd = anfds + fd; ev_io *w; for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) { int ev = w->events & revents; if (ev) ev_feed_event (EV_A_ (W)w, ev); }}/* do not submit kernel events for fds that have reify set *//* because that means they changed while we were polling for new events */inline_speed voidfd_event (EV_P_ int fd, int revents){ ANFD *anfd = anfds + fd; if (expect_true (!anfd->reify)) fd_event_nocheck (EV_A_ fd, revents);}voidev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW{ if (fd >= 0 && fd < anfdmax) fd_event_nocheck (EV_A_ fd, revents);}/* make sure the external fd watch events are in-sync *//* with the kernel/libev internal state */inline_size voidfd_reify (EV_P){ int i;#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP for (i = 0; i < fdchangecnt; ++i) { int fd = fdchanges [i]; ANFD *anfd = anfds + fd; if (anfd->reify & EV__IOFDSET && anfd->head) { SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd); if (handle != anfd->handle) { unsigned long arg; assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0)); /* handle changed, but fd didn't - we need to do it in two steps */ backend_modify (EV_A_ fd, anfd->events, 0); anfd->events = 0; anfd->handle = handle; } } }#endif for (i = 0; i < fdchangecnt; ++i) { int fd = fdchanges [i]; ANFD *anfd = anfds + fd; ev_io *w; unsigned char o_events = anfd->events; unsigned char o_reify = anfd->reify; anfd->reify = 0; /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ { anfd->events = 0; for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) anfd->events |= (unsigned char)w->events; if (o_events != anfd->events) o_reify = EV__IOFDSET; /* actually |= */ } if (o_reify & EV__IOFDSET) backend_modify (EV_A_ fd, o_events, anfd->events); } fdchangecnt = 0;}/* something about the given fd changed */inline_size voidfd_change (EV_P_ int fd, int flags){ unsigned char reify = anfds [fd].reify; anfds [fd].reify |= flags; if (expect_true (!reify)) { ++fdchangecnt; array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); fdchanges [fdchangecnt - 1] = fd; }}/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */inline_speed void ecb_coldfd_kill (EV_P_ int fd){ ev_io *w; while ((w = (ev_io *)anfds [fd].head)) { ev_io_stop (EV_A_ w); ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); }}/* check whether the given fd is actually valid, for error recovery */inline_size int ecb_coldfd_valid (int fd){#ifdef _WIN32 return EV_FD_TO_WIN32_HANDLE (fd) != -1;#else return fcntl (fd, F_GETFD) != -1;#endif}/* called on EBADF to verify fds */static void noinline ecb_coldfd_ebadf (EV_P){ int fd; for (fd = 0; fd < anfdmax; ++fd) if (anfds [fd].events) if (!fd_valid (fd) && errno == EBADF) fd_kill (EV_A_ fd);}/* called on ENOMEM in select/poll to kill some fds and retry */static void noinline ecb_coldfd_enomem (EV_P){ int fd; for (fd = anfdmax; fd--; ) if (anfds [fd].events) { fd_kill (EV_A_ fd); break; }}/* usually called after fork if backend needs to re-arm all fds from scratch */static void noinlinefd_rearm_all (EV_P){ int fd; for (fd = 0; fd < anfdmax; ++fd) if (anfds [fd].events) { anfds [fd].events = 0; anfds [fd].emask = 0; fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY); }}/* used to prepare libev internal fd's *//* this is not fork-safe */inline_speed voidfd_intern (int fd){#ifdef _WIN32 unsigned long arg = 1; ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);#else fcntl (fd, F_SETFD, FD_CLOEXEC); fcntl (fd, F_SETFL, O_NONBLOCK);#endif}/*****************************************************************************//* * the heap functions want a real array index. array index 0 is guaranteed to not * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives * the branching factor of the d-tree. *//* * at the moment we allow libev the luxury of two heaps, * a small-code-size 2-heap one and a ~1.5kb larger 4-heap * which is more cache-efficient. * the difference is about 5% with 50000+ watchers. */#if EV_USE_4HEAP#define DHEAP 4#define HEAP0 (DHEAP - 1) /* index of first element in heap */#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)#define UPHEAP_DONE(p,k) ((p) == (k))/* away from the root */inline_speed voiddownheap (ANHE *heap, int N, int k){ ANHE he = heap [k]; ANHE *E = heap + N + HEAP0; for (;;) { ev_tstamp minat; ANHE *minpos; ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1; /* find minimum child */ if (expect_true (pos + DHEAP - 1 < E)) { /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); } else if (pos < E) { /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); } else break; if (ANHE_at (he) <= minat) break; heap [k] = *minpos; ev_active (ANHE_w (*minpos)) = k; k = minpos - heap; } heap [k] = he; ev_active (ANHE_w (he)) = k;}#else /* 4HEAP */#define HEAP0 1#define HPARENT(k) ((k) >> 1)#define UPHEAP_DONE(p,k) (!(p))/* away from the root */inline_speed voiddownheap (ANHE *heap, int N, int k){ ANHE he = heap [k]; for (;;) { int c = k << 1; if (c >= N + HEAP0) break; c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1]) ? 1 : 0; if (ANHE_at (he) <= ANHE_at (heap [c])) break; heap [k] = heap [c]; ev_active (ANHE_w (heap [k])) = k; k = c; } heap [k] = he; ev_active (ANHE_w (he)) = k;}#endif/* towards the root */inline_speed voidupheap (ANHE *heap, int k){ ANHE he = heap [k]; for (;;) { int p = HPARENT (k); if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he)) break; heap [k] = heap [p]; ev_active (ANHE_w (heap [k])) = k; k = p; } heap [k] = he; ev_active (ANHE_w (he)) = k;}/* move an element suitably so it is in a correct place */inline_size voidadjustheap (ANHE *heap, int N, int k){ if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)])) upheap (heap, k); else downheap (heap, N, k);}/* rebuild the heap: this function is used only once and executed rarely */inline_size voidreheap (ANHE *heap, int N){ int i; /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */ /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */ for (i = 0; i < N; ++i) upheap (heap, i + HEAP0);}/*****************************************************************************//* associate signal watchers to a signal signal */typedef struct{ EV_ATOMIC_T pending;#if EV_MULTIPLICITY EV_P;#endif WL head;} ANSIG;static ANSIG signals [EV_NSIG - 1];/*****************************************************************************/#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLEstatic void noinline ecb_coldevpipe_init (EV_P){ if (!ev_is_active (&pipe_w)) { int fds [2];# if EV_USE_EVENTFD fds [0] = -1; fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); if (fds [1] < 0 && errno == EINVAL) fds [1] = eventfd (0, 0); if (fds [1] < 0)# endif { while (pipe (fds)) ev_syserr ("(libev) error creating signal/async pipe"); fd_intern (fds [0]); } fd_intern (fds [1]); evpipe [0] = fds [0]; if (evpipe [1] < 0) evpipe [1] = fds [1]; /* first call, set write fd */ else { /* on subsequent calls, do not change evpipe [1] */ /* so that evpipe_write can always rely on its value. */ /* this branch does not do anything sensible on windows, */ /* so must not be executed on windows */ dup2 (fds [1], evpipe [1]); close (fds [1]); } ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ); ev_io_start (EV_A_ &pipe_w); ev_unref (EV_A); /* watcher should not keep loop alive */ }}inline_speed voidevpipe_write (EV_P_ EV_ATOMIC_T *flag){ ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */ if (expect_true (*flag)) return; *flag = 1; ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */ pipe_write_skipped = 1; ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */ if (pipe_write_wanted) { int old_errno; pipe_write_skipped = 0; ECB_MEMORY_FENCE_RELEASE; old_errno = errno; /* save errno because write will clobber it */#if EV_USE_EVENTFD if (evpipe [0] < 0) { uint64_t counter = 1; write (evpipe [1], &counter, sizeof (uint64_t)); } else#endif {#ifdef _WIN32 WSABUF buf; DWORD sent; buf.buf = &buf; buf.len = 1; WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);#else write (evpipe [1], &(evpipe [1]), 1);#endif } errno = old_errno; }}/* called whenever the libev signal pipe *//* got some events (signal, async) */static voidpipecb (EV_P_ ev_io *iow, int revents){ int i; if (revents & EV_READ) {#if EV_USE_EVENTFD if (evpipe [0] < 0) { uint64_t counter; read (evpipe [1], &counter, sizeof (uint64_t)); } else#endif { char dummy[4];#ifdef _WIN32 WSABUF buf; DWORD recvd; DWORD flags = 0; buf.buf = dummy; buf.len = sizeof (dummy); WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);#else read (evpipe [0], &dummy, sizeof (dummy));#endif } } pipe_write_skipped = 0; ECB_MEMORY_FENCE; /* push out skipped, acquire flags */#if EV_SIGNAL_ENABLE if (sig_pending) { sig_pending = 0; ECB_MEMORY_FENCE; for (i = EV_NSIG - 1; i--; ) if (expect_false (signals [i].pending)) ev_feed_signal_event (EV_A_ i + 1); }#endif#if EV_ASYNC_ENABLE if (async_pending) { async_pending = 0; ECB_MEMORY_FENCE; for (i = asynccnt; i--; ) if (asyncs [i]->sent) { asyncs [i]->sent = 0; ECB_MEMORY_FENCE_RELEASE; ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); } }#endif}/*****************************************************************************/voidev_feed_signal (int signum) EV_THROW{#if EV_MULTIPLICITY EV_P; ECB_MEMORY_FENCE_ACQUIRE; EV_A = signals [signum - 1].loop; if (!EV_A) return;#endif signals [signum - 1].pending = 1; evpipe_write (EV_A_ &sig_pending);}static voidev_sighandler (int signum){#ifdef _WIN32 signal (signum, ev_sighandler);#endif ev_feed_signal (signum);}void noinlineev_feed_signal_event (EV_P_ int signum) EV_THROW{ WL w; if (expect_false (signum <= 0 || signum >= EV_NSIG)) return; --signum;#if EV_MULTIPLICITY /* it is permissible to try to feed a signal to the wrong loop */ /* or, likely more useful, feeding a signal nobody is waiting for */ if (expect_false (signals [signum].loop != EV_A)) return;#endif signals [signum].pending = 0; ECB_MEMORY_FENCE_RELEASE; for (w = signals [signum].head; w; w = w->next) ev_feed_event (EV_A_ (W)w, EV_SIGNAL);}#if EV_USE_SIGNALFDstatic voidsigfdcb (EV_P_ ev_io *iow, int revents){ struct signalfd_siginfo si[2], *sip; /* these structs are big */ for (;;) { ssize_t res = read (sigfd, si, sizeof (si)); /* not ISO-C, as res might be -1, but works with SuS */ for (sip = si; (char *)sip < (char *)si + res; ++sip) ev_feed_signal_event (EV_A_ sip->ssi_signo); if (res < (ssize_t)sizeof (si)) break; }}#endif#endif/*****************************************************************************/#if EV_CHILD_ENABLEstatic WL childs [EV_PID_HASHSIZE];static ev_signal childev;#ifndef WIFCONTINUED# define WIFCONTINUED(status) 0#endif/* handle a single child status event */inline_speed voidchild_reap (EV_P_ int chain, int pid, int status){ ev_child *w; int traced = WIFSTOPPED (status) || WIFCONTINUED (status); for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next) { if ((w->pid == pid || !w->pid) && (!traced || (w->flags & 1))) { ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ w->rpid = pid; w->rstatus = status; ev_feed_event (EV_A_ (W)w, EV_CHILD); } }}#ifndef WCONTINUED# define WCONTINUED 0#endif/* called on sigchld etc., calls waitpid */static voidchildcb (EV_P_ ev_signal *sw, int revents){ int pid, status; /* some systems define WCONTINUED but then fail to support it (linux 2.4) */ if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) if (!WCONTINUED || errno != EINVAL || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) return; /* make sure we are called again until all children have been reaped */ /* we need to do it this way so that the callback gets called before we continue */ ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); child_reap (EV_A_ pid, pid, status); if ((EV_PID_HASHSIZE) > 1) child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */}#endif/*****************************************************************************/#if EV_USE_IOCP# include "ev_iocp.c"#endif#if EV_USE_PORT# include "ev_port.c"#endif#if EV_USE_KQUEUE# include "ev_kqueue.c"#endif#if EV_USE_EPOLL# include "ev_epoll.c"#endif#if EV_USE_POLL# include "ev_poll.c"#endif#if EV_USE_SELECT# include "ev_select.c"#endifint ecb_coldev_version_major (void) EV_THROW{ return EV_VERSION_MAJOR;}int ecb_coldev_version_minor (void) EV_THROW{ return EV_VERSION_MINOR;}/* return true if we are running with elevated privileges and should ignore env variables */int inline_size ecb_coldenable_secure (void){#ifdef _WIN32 return 0;#else return getuid () != geteuid () || getgid () != getegid ();#endif}unsigned int ecb_coldev_supported_backends (void) EV_THROW{ unsigned int flags = 0; if (EV_USE_PORT ) flags |= EVBACKEND_PORT; if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; if (EV_USE_POLL ) flags |= EVBACKEND_POLL; if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; return flags;}unsigned int ecb_coldev_recommended_backends (void) EV_THROW{ unsigned int flags = ev_supported_backends ();#ifndef __NetBSD__ /* kqueue is borked on everything but netbsd apparently */ /* it usually doesn't work correctly on anything but sockets and pipes */ flags &= ~EVBACKEND_KQUEUE;#endif#ifdef __APPLE__ /* only select works correctly on that "unix-certified" platform */ flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */ flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */#endif#ifdef __FreeBSD__ flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */#endif return flags;}unsigned int ecb_coldev_embeddable_backends (void) EV_THROW{ int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */ flags &= ~EVBACKEND_EPOLL; return flags;}unsigned intev_backend (EV_P) EV_THROW{ return backend;}#if EV_FEATURE_APIunsigned intev_iteration (EV_P) EV_THROW{ return loop_count;}unsigned intev_depth (EV_P) EV_THROW{ return loop_depth;}voidev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW{ io_blocktime = interval;}voidev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW{ timeout_blocktime = interval;}voidev_set_userdata (EV_P_ void *data) EV_THROW{ userdata = data;}void *ev_userdata (EV_P) EV_THROW{ return userdata;}voidev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW{ invoke_cb = invoke_pending_cb;}voidev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW{ release_cb = release; acquire_cb = acquire;}#endif/* initialise a loop structure, must be zero-initialised */static void noinline ecb_coldloop_init (EV_P_ unsigned int flags) EV_THROW{ if (!backend) { origflags = flags;#if EV_USE_REALTIME if (!have_realtime) { struct timespec ts; if (!clock_gettime (CLOCK_REALTIME, &ts)) have_realtime = 1; }#endif#if EV_USE_MONOTONIC if (!have_monotonic) { struct timespec ts; if (!clock_gettime (CLOCK_MONOTONIC, &ts)) have_monotonic = 1; }#endif /* pid check not overridable via env */#ifndef _WIN32 if (flags & EVFLAG_FORKCHECK) curpid = getpid ();#endif if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS")) flags = atoi (getenv ("LIBEV_FLAGS")); ev_rt_now = ev_time (); mn_now = get_clock (); now_floor = mn_now; rtmn_diff = ev_rt_now - mn_now;#if EV_FEATURE_API invoke_cb = ev_invoke_pending;#endif io_blocktime = 0.; timeout_blocktime = 0.; backend = 0; backend_fd = -1; sig_pending = 0;#if EV_ASYNC_ENABLE async_pending = 0;#endif pipe_write_skipped = 0; pipe_write_wanted = 0; evpipe [0] = -1; evpipe [1] = -1;#if EV_USE_INOTIFY fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;#endif#if EV_USE_SIGNALFD sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;#endif if (!(flags & EVBACKEND_MASK)) flags |= ev_recommended_backends ();#if EV_USE_IOCP if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);#endif#if EV_USE_PORT if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);#endif#if EV_USE_KQUEUE if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);#endif#if EV_USE_EPOLL if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);#endif#if EV_USE_POLL if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);#endif#if EV_USE_SELECT if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);#endif ev_prepare_init (&pending_w, pendingcb);#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE ev_init (&pipe_w, pipecb); ev_set_priority (&pipe_w, EV_MAXPRI);#endif }}/* free up a loop structure */void ecb_coldev_loop_destroy (EV_P){ int i;#if EV_MULTIPLICITY /* mimic free (0) */ if (!EV_A) return;#endif#if EV_CLEANUP_ENABLE /* queue cleanup watchers (and execute them) */ if (expect_false (cleanupcnt)) { queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP); EV_INVOKE_PENDING; }#endif#if EV_CHILD_ENABLE if (ev_is_default_loop (EV_A) && ev_is_active (&childev)) { ev_ref (EV_A); /* child watcher */ ev_signal_stop (EV_A_ &childev); }#endif if (ev_is_active (&pipe_w)) { /*ev_ref (EV_A);*/ /*ev_io_stop (EV_A_ &pipe_w);*/ if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]); if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]); }#if EV_USE_SIGNALFD if (ev_is_active (&sigfd_w)) close (sigfd);#endif#if EV_USE_INOTIFY if (fs_fd >= 0) close (fs_fd);#endif if (backend_fd >= 0) close (backend_fd);#if EV_USE_IOCP if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);#endif#if EV_USE_PORT if (backend == EVBACKEND_PORT ) port_destroy (EV_A);#endif#if EV_USE_KQUEUE if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);#endif#if EV_USE_EPOLL if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);#endif#if EV_USE_POLL if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);#endif#if EV_USE_SELECT if (backend == EVBACKEND_SELECT) select_destroy (EV_A);#endif for (i = NUMPRI; i--; ) { array_free (pending, [i]);#if EV_IDLE_ENABLE array_free (idle, [i]);#endif } ev_free (anfds); anfds = 0; anfdmax = 0; /* have to use the microsoft-never-gets-it-right macro */ array_free (rfeed, EMPTY); array_free (fdchange, EMPTY); array_free (timer, EMPTY);#if EV_PERIODIC_ENABLE array_free (periodic, EMPTY);#endif#if EV_FORK_ENABLE array_free (fork, EMPTY);#endif#if EV_CLEANUP_ENABLE array_free (cleanup, EMPTY);#endif array_free (prepare, EMPTY); array_free (check, EMPTY);#if EV_ASYNC_ENABLE array_free (async, EMPTY);#endif backend = 0;#if EV_MULTIPLICITY if (ev_is_default_loop (EV_A))#endif ev_default_loop_ptr = 0;#if EV_MULTIPLICITY else ev_free (EV_A);#endif}#if EV_USE_INOTIFYinline_size void infy_fork (EV_P);#endifinline_size voidloop_fork (EV_P){#if EV_USE_PORT if (backend == EVBACKEND_PORT ) port_fork (EV_A);#endif#if EV_USE_KQUEUE if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);#endif#if EV_USE_EPOLL if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);#endif#if EV_USE_INOTIFY infy_fork (EV_A);#endif#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE if (ev_is_active (&pipe_w)) { /* pipe_write_wanted must be false now, so modifying fd vars should be safe */ ev_ref (EV_A); ev_io_stop (EV_A_ &pipe_w); if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]); evpipe_init (EV_A); /* iterate over everything, in case we missed something before */ ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM); }#endif postfork = 0;}#if EV_MULTIPLICITYstruct ev_loop * ecb_coldev_loop_new (unsigned int flags) EV_THROW{ EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); memset (EV_A, 0, sizeof (struct ev_loop)); loop_init (EV_A_ flags); if (ev_backend (EV_A)) return EV_A; ev_free (EV_A); return 0;}#endif /* multiplicity */#if EV_VERIFYstatic void noinline ecb_coldverify_watcher (EV_P_ W w){ assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); if (w->pending) assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));}static void noinline ecb_coldverify_heap (EV_P_ ANHE *heap, int N){ int i; for (i = HEAP0; i < N + HEAP0; ++i) { assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i)); assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i]))); assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i])))); verify_watcher (EV_A_ (W)ANHE_w (heap [i])); }}static void noinline ecb_coldarray_verify (EV_P_ W *ws, int cnt){ while (cnt--) { assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); verify_watcher (EV_A_ ws [cnt]); }}#endif#if EV_FEATURE_APIvoid ecb_coldev_verify (EV_P) EV_THROW{#if EV_VERIFY int i; WL w, w2; assert (activecnt >= -1); assert (fdchangemax >= fdchangecnt); for (i = 0; i < fdchangecnt; ++i) assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); assert (anfdmax >= 0); for (i = 0; i < anfdmax; ++i) { int j = 0; for (w = w2 = anfds [i].head; w; w = w->next) { verify_watcher (EV_A_ (W)w); if (j++ & 1) { assert (("libev: io watcher list contains a loop", w != w2)); w2 = w2->next; } assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); } } assert (timermax >= timercnt); verify_heap (EV_A_ timers, timercnt);#if EV_PERIODIC_ENABLE assert (periodicmax >= periodiccnt); verify_heap (EV_A_ periodics, periodiccnt);#endif for (i = NUMPRI; i--; ) { assert (pendingmax [i] >= pendingcnt [i]);#if EV_IDLE_ENABLE assert (idleall >= 0); assert (idlemax [i] >= idlecnt [i]); array_verify (EV_A_ (W *)idles [i], idlecnt [i]);#endif }#if EV_FORK_ENABLE assert (forkmax >= forkcnt); array_verify (EV_A_ (W *)forks, forkcnt);#endif#if EV_CLEANUP_ENABLE assert (cleanupmax >= cleanupcnt); array_verify (EV_A_ (W *)cleanups, cleanupcnt);#endif#if EV_ASYNC_ENABLE assert (asyncmax >= asynccnt); array_verify (EV_A_ (W *)asyncs, asynccnt);#endif#if EV_PREPARE_ENABLE assert (preparemax >= preparecnt); array_verify (EV_A_ (W *)prepares, preparecnt);#endif#if EV_CHECK_ENABLE assert (checkmax >= checkcnt); array_verify (EV_A_ (W *)checks, checkcnt);#endif# if 0#if EV_CHILD_ENABLE for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next) for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)#endif# endif#endif}#endif#if EV_MULTIPLICITYstruct ev_loop * ecb_cold#elseint#endifev_default_loop (unsigned int flags) EV_THROW{ if (!ev_default_loop_ptr) {#if EV_MULTIPLICITY EV_P = ev_default_loop_ptr = &default_loop_struct;#else ev_default_loop_ptr = 1;#endif loop_init (EV_A_ flags); if (ev_backend (EV_A)) {#if EV_CHILD_ENABLE ev_signal_init (&childev, childcb, SIGCHLD); ev_set_priority (&childev, EV_MAXPRI); ev_signal_start (EV_A_ &childev); ev_unref (EV_A); /* child watcher should not keep loop alive */#endif } else ev_default_loop_ptr = 0; } return ev_default_loop_ptr;}voidev_loop_fork (EV_P) EV_THROW{ postfork = 1;}/*****************************************************************************/voidev_invoke (EV_P_ void *w, int revents){ EV_CB_INVOKE ((W)w, revents);}unsigned intev_pending_count (EV_P) EV_THROW{ int pri; unsigned int count = 0; for (pri = NUMPRI; pri--; ) count += pendingcnt [pri]; return count;}void noinlineev_invoke_pending (EV_P){ pendingpri = NUMPRI; while (pendingpri) /* pendingpri possibly gets modified in the inner loop */ { --pendingpri; while (pendingcnt [pendingpri]) { ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri]; p->w->pending = 0; EV_CB_INVOKE (p->w, p->events); EV_FREQUENT_CHECK; } }}#if EV_IDLE_ENABLE/* make idle watchers pending. this handles the "call-idle *//* only when higher priorities are idle" logic */inline_size voididle_reify (EV_P){ if (expect_false (idleall)) { int pri; for (pri = NUMPRI; pri--; ) { if (pendingcnt [pri]) break; if (idlecnt [pri]) { queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE); break; } } }}#endif/* make timers pending */inline_size voidtimers_reify (EV_P){ EV_FREQUENT_CHECK; if (timercnt && ANHE_at (timers [HEAP0]) < mn_now) { do { ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]); /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/ /* first reschedule or stop timer */ if (w->repeat) { ev_at (w) += w->repeat; if (ev_at (w) < mn_now) ev_at (w) = mn_now; assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.)); ANHE_at_cache (timers [HEAP0]); downheap (timers, timercnt, HEAP0); } else ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ EV_FREQUENT_CHECK; feed_reverse (EV_A_ (W)w); } while (timercnt && ANHE_at (timers [HEAP0]) < mn_now); feed_reverse_done (EV_A_ EV_TIMER); }}#if EV_PERIODIC_ENABLEstatic void noinlineperiodic_recalc (EV_P_ ev_periodic *w){ ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL; ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval); /* the above almost always errs on the low side */ while (at <= ev_rt_now) { ev_tstamp nat = at + w->interval; /* when resolution fails us, we use ev_rt_now */ if (expect_false (nat == at)) { at = ev_rt_now; break; } at = nat; } ev_at (w) = at;}/* make periodics pending */inline_size voidperiodics_reify (EV_P){ EV_FREQUENT_CHECK; while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) { do { ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ /* first reschedule or stop timer */ if (w->reschedule_cb) { ev_at (w) = w->reschedule_cb (w, ev_rt_now); assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now)); ANHE_at_cache (periodics [HEAP0]); downheap (periodics, periodiccnt, HEAP0); } else if (w->interval) { periodic_recalc (EV_A_ w); ANHE_at_cache (periodics [HEAP0]); downheap (periodics, periodiccnt, HEAP0); } else ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ EV_FREQUENT_CHECK; feed_reverse (EV_A_ (W)w); } while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now); feed_reverse_done (EV_A_ EV_PERIODIC); }}/* simply recalculate all periodics *//* TODO: maybe ensure that at least one event happens when jumping forward? */static void noinline ecb_coldperiodics_reschedule (EV_P){ int i; /* adjust periodics after time jump */ for (i = HEAP0; i < periodiccnt + HEAP0; ++i) { ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); if (w->reschedule_cb) ev_at (w) = w->reschedule_cb (w, ev_rt_now); else if (w->interval) periodic_recalc (EV_A_ w); ANHE_at_cache (periodics [i]); } reheap (periodics, periodiccnt);}#endif/* adjust all timers by a given offset */static void noinline ecb_coldtimers_reschedule (EV_P_ ev_tstamp adjust){ int i; for (i = 0; i < timercnt; ++i) { ANHE *he = timers + i + HEAP0; ANHE_w (*he)->at += adjust; ANHE_at_cache (*he); }}/* fetch new monotonic and realtime times from the kernel *//* also detect if there was a timejump, and act accordingly */inline_speed voidtime_update (EV_P_ ev_tstamp max_block){#if EV_USE_MONOTONIC if (expect_true (have_monotonic)) { int i; ev_tstamp odiff = rtmn_diff; mn_now = get_clock (); /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ /* interpolate in the meantime */ if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) { ev_rt_now = rtmn_diff + mn_now; return; } now_floor = mn_now; ev_rt_now = ev_time (); /* loop a few times, before making important decisions. * on the choice of "4": one iteration isn't enough, * in case we get preempted during the calls to * ev_time and get_clock. a second call is almost guaranteed * to succeed in that case, though. and looping a few more times * doesn't hurt either as we only do this on time-jumps or * in the unlikely event of having been preempted here. */ for (i = 4; --i; ) { ev_tstamp diff; rtmn_diff = ev_rt_now - mn_now; diff = odiff - rtmn_diff; if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP)) return; /* all is well */ ev_rt_now = ev_time (); mn_now = get_clock (); now_floor = mn_now; } /* no timer adjustment, as the monotonic clock doesn't jump */ /* timers_reschedule (EV_A_ rtmn_diff - odiff) */# if EV_PERIODIC_ENABLE periodics_reschedule (EV_A);# endif } else#endif { ev_rt_now = ev_time (); if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) { /* adjust timers. this is easy, as the offset is the same for all of them */ timers_reschedule (EV_A_ ev_rt_now - mn_now);#if EV_PERIODIC_ENABLE periodics_reschedule (EV_A);#endif } mn_now = ev_rt_now; }}intev_run (EV_P_ int flags){#if EV_FEATURE_API ++loop_depth;#endif assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE)); loop_done = EVBREAK_CANCEL; EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */ do {#if EV_VERIFY >= 2 ev_verify (EV_A);#endif#ifndef _WIN32 if (expect_false (curpid)) /* penalise the forking check even more */ if (expect_false (getpid () != curpid)) { curpid = getpid (); postfork = 1; }#endif#if EV_FORK_ENABLE /* we might have forked, so queue fork handlers */ if (expect_false (postfork)) if (forkcnt) { queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); EV_INVOKE_PENDING; }#endif#if EV_PREPARE_ENABLE /* queue prepare watchers (and execute them) */ if (expect_false (preparecnt)) { queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); EV_INVOKE_PENDING; }#endif if (expect_false (loop_done)) break; /* we might have forked, so reify kernel state if necessary */ if (expect_false (postfork)) loop_fork (EV_A); /* update fd-related kernel structures */ fd_reify (EV_A); /* calculate blocking time */ { ev_tstamp waittime = 0.; ev_tstamp sleeptime = 0.; /* remember old timestamp for io_blocktime calculation */ ev_tstamp prev_mn_now = mn_now; /* update time to cancel out callback processing overhead */ time_update (EV_A_ 1e100); /* from now on, we want a pipe-wake-up */ pipe_write_wanted = 1; ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */ if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped))) { waittime = MAX_BLOCKTIME; if (timercnt) { ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now; if (waittime > to) waittime = to; }#if EV_PERIODIC_ENABLE if (periodiccnt) { ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now; if (waittime > to) waittime = to; }#endif /* don't let timeouts decrease the waittime below timeout_blocktime */ if (expect_false (waittime < timeout_blocktime)) waittime = timeout_blocktime; /* at this point, we NEED to wait, so we have to ensure */ /* to pass a minimum nonzero value to the backend */ if (expect_false (waittime < backend_mintime)) waittime = backend_mintime; /* extra check because io_blocktime is commonly 0 */ if (expect_false (io_blocktime)) { sleeptime = io_blocktime - (mn_now - prev_mn_now); if (sleeptime > waittime - backend_mintime) sleeptime = waittime - backend_mintime; if (expect_true (sleeptime > 0.)) { ev_sleep (sleeptime); waittime -= sleeptime; } } }#if EV_FEATURE_API ++loop_count;#endif assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ backend_poll (EV_A_ waittime); assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ pipe_write_wanted = 0; /* just an optimisation, no fence needed */ ECB_MEMORY_FENCE_ACQUIRE; if (pipe_write_skipped) { assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w))); ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM); } /* update ev_rt_now, do magic */ time_update (EV_A_ waittime + sleeptime); } /* queue pending timers and reschedule them */ timers_reify (EV_A); /* relative timers called last */#if EV_PERIODIC_ENABLE periodics_reify (EV_A); /* absolute timers called first */#endif#if EV_IDLE_ENABLE /* queue idle watchers unless other events are pending */ idle_reify (EV_A);#endif#if EV_CHECK_ENABLE /* queue check watchers, to be executed first */ if (expect_false (checkcnt)) queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);#endif EV_INVOKE_PENDING; } while (expect_true ( activecnt && !loop_done && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT)) )); if (loop_done == EVBREAK_ONE) loop_done = EVBREAK_CANCEL;#if EV_FEATURE_API --loop_depth;#endif return activecnt;}voidev_break (EV_P_ int how) EV_THROW{ loop_done = how;}voidev_ref (EV_P) EV_THROW{ ++activecnt;}voidev_unref (EV_P) EV_THROW{ --activecnt;}voidev_now_update (EV_P) EV_THROW{ time_update (EV_A_ 1e100);}voidev_suspend (EV_P) EV_THROW{ ev_now_update (EV_A);}voidev_resume (EV_P) EV_THROW{ ev_tstamp mn_prev = mn_now; ev_now_update (EV_A); timers_reschedule (EV_A_ mn_now - mn_prev);#if EV_PERIODIC_ENABLE /* TODO: really do this? */ periodics_reschedule (EV_A);#endif}/*****************************************************************************//* singly-linked list management, used when the expected list length is short */inline_size voidwlist_add (WL *head, WL elem){ elem->next = *head; *head = elem;}inline_size voidwlist_del (WL *head, WL elem){ while (*head) { if (expect_true (*head == elem)) { *head = elem->next; break; } head = &(*head)->next; }}/* internal, faster, version of ev_clear_pending */inline_speed voidclear_pending (EV_P_ W w){ if (w->pending) { pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w; w->pending = 0; }}intev_clear_pending (EV_P_ void *w) EV_THROW{ W w_ = (W)w; int pending = w_->pending; if (expect_true (pending)) { ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; p->w = (W)&pending_w; w_->pending = 0; return p->events; } else return 0;}inline_size voidpri_adjust (EV_P_ W w){ int pri = ev_priority (w); pri = pri < EV_MINPRI ? EV_MINPRI : pri; pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; ev_set_priority (w, pri);}inline_speed voidev_start (EV_P_ W w, int active){ pri_adjust (EV_A_ w); w->active = active; ev_ref (EV_A);}inline_size voidev_stop (EV_P_ W w){ ev_unref (EV_A); w->active = 0;}/*****************************************************************************/void noinlineev_io_start (EV_P_ ev_io *w) EV_THROW{ int fd = w->fd; if (expect_false (ev_is_active (w))) return; assert (("libev: ev_io_start called with negative fd", fd >= 0)); assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); EV_FREQUENT_CHECK; ev_start (EV_A_ (W)w, 1); array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); wlist_add (&anfds[fd].head, (WL)w); /* common bug, apparently */ assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w)); fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); w->events &= ~EV__IOFDSET; EV_FREQUENT_CHECK;}void noinlineev_io_stop (EV_P_ ev_io *w) EV_THROW{ clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); EV_FREQUENT_CHECK; wlist_del (&anfds[w->fd].head, (WL)w); ev_stop (EV_A_ (W)w); fd_change (EV_A_ w->fd, EV_ANFD_REIFY); EV_FREQUENT_CHECK;}void noinlineev_timer_start (EV_P_ ev_timer *w) EV_THROW{ if (expect_false (ev_is_active (w))) return; ev_at (w) += mn_now; assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); EV_FREQUENT_CHECK; ++timercnt; ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); ANHE_w (timers [ev_active (w)]) = (WT)w; ANHE_at_cache (timers [ev_active (w)]); upheap (timers, ev_active (w)); EV_FREQUENT_CHECK; /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/}void noinlineev_timer_stop (EV_P_ ev_timer *w) EV_THROW{ clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; { int active = ev_active (w); assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); --timercnt; if (expect_true (active < timercnt + HEAP0)) { timers [active] = timers [timercnt + HEAP0]; adjustheap (timers, timercnt, active); } } ev_at (w) -= mn_now; ev_stop (EV_A_ (W)w); EV_FREQUENT_CHECK;}void noinlineev_timer_again (EV_P_ ev_timer *w) EV_THROW{ EV_FREQUENT_CHECK; clear_pending (EV_A_ (W)w); if (ev_is_active (w)) { if (w->repeat) { ev_at (w) = mn_now + w->repeat; ANHE_at_cache (timers [ev_active (w)]); adjustheap (timers, timercnt, ev_active (w)); } else ev_timer_stop (EV_A_ w); } else if (w->repeat) { ev_at (w) = w->repeat; ev_timer_start (EV_A_ w); } EV_FREQUENT_CHECK;}ev_tstampev_timer_remaining (EV_P_ ev_timer *w) EV_THROW{ return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);}#if EV_PERIODIC_ENABLEvoid noinlineev_periodic_start (EV_P_ ev_periodic *w) EV_THROW{ if (expect_false (ev_is_active (w))) return; if (w->reschedule_cb) ev_at (w) = w->reschedule_cb (w, ev_rt_now); else if (w->interval) { assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); periodic_recalc (EV_A_ w); } else ev_at (w) = w->offset; EV_FREQUENT_CHECK; ++periodiccnt; ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); ANHE_w (periodics [ev_active (w)]) = (WT)w; ANHE_at_cache (periodics [ev_active (w)]); upheap (periodics, ev_active (w)); EV_FREQUENT_CHECK; /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/}void noinlineev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW{ clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; { int active = ev_active (w); assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); --periodiccnt; if (expect_true (active < periodiccnt + HEAP0)) { periodics [active] = periodics [periodiccnt + HEAP0]; adjustheap (periodics, periodiccnt, active); } } ev_stop (EV_A_ (W)w); EV_FREQUENT_CHECK;}void noinlineev_periodic_again (EV_P_ ev_periodic *w) EV_THROW{ /* TODO: use adjustheap and recalculation */ ev_periodic_stop (EV_A_ w); ev_periodic_start (EV_A_ w);}#endif#ifndef SA_RESTART# define SA_RESTART 0#endif#if EV_SIGNAL_ENABLEvoid noinlineev_signal_start (EV_P_ ev_signal *w) EV_THROW{ if (expect_false (ev_is_active (w))) return; assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));#if EV_MULTIPLICITY assert (("libev: a signal must not be attached to two different loops", !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); signals [w->signum - 1].loop = EV_A; ECB_MEMORY_FENCE_RELEASE;#endif EV_FREQUENT_CHECK;#if EV_USE_SIGNALFD if (sigfd == -2) { sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC); if (sigfd < 0 && errno == EINVAL) sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */ if (sigfd >= 0) { fd_intern (sigfd); /* doing it twice will not hurt */ sigemptyset (&sigfd_set); ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ); ev_set_priority (&sigfd_w, EV_MAXPRI); ev_io_start (EV_A_ &sigfd_w); ev_unref (EV_A); /* signalfd watcher should not keep loop alive */ } } if (sigfd >= 0) { /* TODO: check .head */ sigaddset (&sigfd_set, w->signum); sigprocmask (SIG_BLOCK, &sigfd_set, 0); signalfd (sigfd, &sigfd_set, 0); }#endif ev_start (EV_A_ (W)w, 1); wlist_add (&signals [w->signum - 1].head, (WL)w); if (!((WL)w)->next)# if EV_USE_SIGNALFD if (sigfd < 0) /*TODO*/# endif {# ifdef _WIN32 evpipe_init (EV_A); signal (w->signum, ev_sighandler);# else struct sigaction sa; evpipe_init (EV_A); sa.sa_handler = ev_sighandler; sigfillset (&sa.sa_mask); sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ sigaction (w->signum, &sa, 0); if (origflags & EVFLAG_NOSIGMASK) { sigemptyset (&sa.sa_mask); sigaddset (&sa.sa_mask, w->signum); sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); }#endif } EV_FREQUENT_CHECK;}void noinlineev_signal_stop (EV_P_ ev_signal *w) EV_THROW{ clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; wlist_del (&signals [w->signum - 1].head, (WL)w); ev_stop (EV_A_ (W)w); if (!signals [w->signum - 1].head) {#if EV_MULTIPLICITY signals [w->signum - 1].loop = 0; /* unattach from signal */#endif#if EV_USE_SIGNALFD if (sigfd >= 0) { sigset_t ss; sigemptyset (&ss); sigaddset (&ss, w->signum); sigdelset (&sigfd_set, w->signum); signalfd (sigfd, &sigfd_set, 0); sigprocmask (SIG_UNBLOCK, &ss, 0); } else#endif signal (w->signum, SIG_DFL); } EV_FREQUENT_CHECK;}#endif#if EV_CHILD_ENABLEvoidev_child_start (EV_P_ ev_child *w) EV_THROW{#if EV_MULTIPLICITY assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));#endif if (expect_false (ev_is_active (w))) return; EV_FREQUENT_CHECK; ev_start (EV_A_ (W)w, 1); wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w); EV_FREQUENT_CHECK;}voidev_child_stop (EV_P_ ev_child *w) EV_THROW{ clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w); ev_stop (EV_A_ (W)w); EV_FREQUENT_CHECK;}#endif#if EV_STAT_ENABLE# ifdef _WIN32# undef lstat# define lstat(a,b) _stati64 (a,b)# endif#define DEF_STAT_INTERVAL 5.0074891#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */#define MIN_STAT_INTERVAL 0.1074891static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);#if EV_USE_INOTIFY/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)static void noinlineinfy_add (EV_P_ ev_stat *w){ w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO | IN_DONT_FOLLOW | IN_MASK_ADD); if (w->wd >= 0) { struct statfs sfs; /* now local changes will be tracked by inotify, but remote changes won't */ /* unless the filesystem is known to be local, we therefore still poll */ /* also do poll on <2.6.25, but with normal frequency */ if (!fs_2625) w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; else if (!statfs (w->path, &sfs) && (sfs.f_type == 0x1373 /* devfs */ || sfs.f_type == 0x4006 /* fat */ || sfs.f_type == 0x4d44 /* msdos */ || sfs.f_type == 0xEF53 /* ext2/3 */ || sfs.f_type == 0x72b6 /* jffs2 */ || sfs.f_type == 0x858458f6 /* ramfs */ || sfs.f_type == 0x5346544e /* ntfs */ || sfs.f_type == 0x3153464a /* jfs */ || sfs.f_type == 0x9123683e /* btrfs */ || sfs.f_type == 0x52654973 /* reiser3 */ || sfs.f_type == 0x01021994 /* tmpfs */ || sfs.f_type == 0x58465342 /* xfs */)) w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ else w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ } else { /* can't use inotify, continue to stat */ w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; /* if path is not there, monitor some parent directory for speedup hints */ /* note that exceeding the hardcoded path limit is not a correctness issue, */ /* but an efficiency issue only */ if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) { char path [4096]; strcpy (path, w->path); do { int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); char *pend = strrchr (path, '/'); if (!pend || pend == path) break; *pend = 0; w->wd = inotify_add_watch (fs_fd, path, mask); } while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); } } if (w->wd >= 0) wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w); /* now re-arm timer, if required */ if (ev_is_active (&w->timer)) ev_ref (EV_A); ev_timer_again (EV_A_ &w->timer); if (ev_is_active (&w->timer)) ev_unref (EV_A);}static void noinlineinfy_del (EV_P_ ev_stat *w){ int slot; int wd = w->wd; if (wd < 0) return; w->wd = -2; slot = wd & ((EV_INOTIFY_HASHSIZE) - 1); wlist_del (&fs_hash [slot].head, (WL)w); /* remove this watcher, if others are watching it, they will rearm */ inotify_rm_watch (fs_fd, wd);}static void noinlineinfy_wd (EV_P_ int slot, int wd, struct inotify_event *ev){ if (slot < 0) /* overflow, need to check for all hash slots */ for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) infy_wd (EV_A_ slot, wd, ev); else { WL w_; for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; ) { ev_stat *w = (ev_stat *)w_; w_ = w_->next; /* lets us remove this watcher and all before it */ if (w->wd == wd || wd == -1) { if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) { wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w); w->wd = -1; infy_add (EV_A_ w); /* re-add, no matter what */ } stat_timer_cb (EV_A_ &w->timer, 0); } } }}static voidinfy_cb (EV_P_ ev_io *w, int revents){ char buf [EV_INOTIFY_BUFSIZE]; int ofs; int len = read (fs_fd, buf, sizeof (buf)); for (ofs = 0; ofs < len; ) { struct inotify_event *ev = (struct inotify_event *)(buf + ofs); infy_wd (EV_A_ ev->wd, ev->wd, ev); ofs += sizeof (struct inotify_event) + ev->len; }}inline_size void ecb_coldev_check_2625 (EV_P){ /* kernels < 2.6.25 are borked * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html */ if (ev_linux_version () < 0x020619) return; fs_2625 = 1;}inline_size intinfy_newfd (void){#if defined IN_CLOEXEC && defined IN_NONBLOCK int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); if (fd >= 0) return fd;#endif return inotify_init ();}inline_size voidinfy_init (EV_P){ if (fs_fd != -2) return; fs_fd = -1; ev_check_2625 (EV_A); fs_fd = infy_newfd (); if (fs_fd >= 0) { fd_intern (fs_fd); ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); ev_set_priority (&fs_w, EV_MAXPRI); ev_io_start (EV_A_ &fs_w); ev_unref (EV_A); }}inline_size voidinfy_fork (EV_P){ int slot; if (fs_fd < 0) return; ev_ref (EV_A); ev_io_stop (EV_A_ &fs_w); close (fs_fd); fs_fd = infy_newfd (); if (fs_fd >= 0) { fd_intern (fs_fd); ev_io_set (&fs_w, fs_fd, EV_READ); ev_io_start (EV_A_ &fs_w); ev_unref (EV_A); } for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) { WL w_ = fs_hash [slot].head; fs_hash [slot].head = 0; while (w_) { ev_stat *w = (ev_stat *)w_; w_ = w_->next; /* lets us add this watcher */ w->wd = -1; if (fs_fd >= 0) infy_add (EV_A_ w); /* re-add, no matter what */ else { w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; if (ev_is_active (&w->timer)) ev_ref (EV_A); ev_timer_again (EV_A_ &w->timer); if (ev_is_active (&w->timer)) ev_unref (EV_A); } } }}#endif#ifdef _WIN32# define EV_LSTAT(p,b) _stati64 (p, b)#else# define EV_LSTAT(p,b) lstat (p, b)#endifvoidev_stat_stat (EV_P_ ev_stat *w) EV_THROW{ if (lstat (w->path, &w->attr) < 0) w->attr.st_nlink = 0; else if (!w->attr.st_nlink) w->attr.st_nlink = 1;}static void noinlinestat_timer_cb (EV_P_ ev_timer *w_, int revents){ ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); ev_statdata prev = w->attr; ev_stat_stat (EV_A_ w); /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ if ( prev.st_dev != w->attr.st_dev || prev.st_ino != w->attr.st_ino || prev.st_mode != w->attr.st_mode || prev.st_nlink != w->attr.st_nlink || prev.st_uid != w->attr.st_uid || prev.st_gid != w->attr.st_gid || prev.st_rdev != w->attr.st_rdev || prev.st_size != w->attr.st_size || prev.st_atime != w->attr.st_atime || prev.st_mtime != w->attr.st_mtime || prev.st_ctime != w->attr.st_ctime ) { /* we only update w->prev on actual differences */ /* in case we test more often than invoke the callback, */ /* to ensure that prev is always different to attr */ w->prev = prev; #if EV_USE_INOTIFY if (fs_fd >= 0) { infy_del (EV_A_ w); infy_add (EV_A_ w); ev_stat_stat (EV_A_ w); /* avoid race... */ } #endif ev_feed_event (EV_A_ w, EV_STAT); }}voidev_stat_start (EV_P_ ev_stat *w) EV_THROW{ if (expect_false (ev_is_active (w))) return; ev_stat_stat (EV_A_ w); if (w->interval < MIN_STAT_INTERVAL && w->interval) w->interval = MIN_STAT_INTERVAL; ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL); ev_set_priority (&w->timer, ev_priority (w));#if EV_USE_INOTIFY infy_init (EV_A); if (fs_fd >= 0) infy_add (EV_A_ w); else#endif { ev_timer_again (EV_A_ &w->timer); ev_unref (EV_A); } ev_start (EV_A_ (W)w, 1); EV_FREQUENT_CHECK;}voidev_stat_stop (EV_P_ ev_stat *w) EV_THROW{ clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK;#if EV_USE_INOTIFY infy_del (EV_A_ w);#endif if (ev_is_active (&w->timer)) { ev_ref (EV_A); ev_timer_stop (EV_A_ &w->timer); } ev_stop (EV_A_ (W)w); EV_FREQUENT_CHECK;}#endif#if EV_IDLE_ENABLEvoidev_idle_start (EV_P_ ev_idle *w) EV_THROW{ if (expect_false (ev_is_active (w))) return; pri_adjust (EV_A_ (W)w); EV_FREQUENT_CHECK; { int active = ++idlecnt [ABSPRI (w)]; ++idleall; ev_start (EV_A_ (W)w, active); array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); idles [ABSPRI (w)][active - 1] = w; } EV_FREQUENT_CHECK;}voidev_idle_stop (EV_P_ ev_idle *w) EV_THROW{ clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; { int active = ev_active (w); idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; ev_active (idles [ABSPRI (w)][active - 1]) = active; ev_stop (EV_A_ (W)w); --idleall; } EV_FREQUENT_CHECK;}#endif#if EV_PREPARE_ENABLEvoidev_prepare_start (EV_P_ ev_prepare *w) EV_THROW{ if (expect_false (ev_is_active (w))) return; EV_FREQUENT_CHECK; ev_start (EV_A_ (W)w, ++preparecnt); array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); prepares [preparecnt - 1] = w; EV_FREQUENT_CHECK;}voidev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW{ clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; { int active = ev_active (w); prepares [active - 1] = prepares [--preparecnt]; ev_active (prepares [active - 1]) = active; } ev_stop (EV_A_ (W)w); EV_FREQUENT_CHECK;}#endif#if EV_CHECK_ENABLEvoidev_check_start (EV_P_ ev_check *w) EV_THROW{ if (expect_false (ev_is_active (w))) return; EV_FREQUENT_CHECK; ev_start (EV_A_ (W)w, ++checkcnt); array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); checks [checkcnt - 1] = w; EV_FREQUENT_CHECK;}voidev_check_stop (EV_P_ ev_check *w) EV_THROW{ clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; { int active = ev_active (w); checks [active - 1] = checks [--checkcnt]; ev_active (checks [active - 1]) = active; } ev_stop (EV_A_ (W)w); EV_FREQUENT_CHECK;}#endif#if EV_EMBED_ENABLEvoid noinlineev_embed_sweep (EV_P_ ev_embed *w) EV_THROW{ ev_run (w->other, EVRUN_NOWAIT);}static voidembed_io_cb (EV_P_ ev_io *io, int revents){ ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); if (ev_cb (w)) ev_feed_event (EV_A_ (W)w, EV_EMBED); else ev_run (w->other, EVRUN_NOWAIT);}static voidembed_prepare_cb (EV_P_ ev_prepare *prepare, int revents){ ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); { EV_P = w->other; while (fdchangecnt) { fd_reify (EV_A); ev_run (EV_A_ EVRUN_NOWAIT); } }}static voidembed_fork_cb (EV_P_ ev_fork *fork_w, int revents){ ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork)); ev_embed_stop (EV_A_ w); { EV_P = w->other; ev_loop_fork (EV_A); ev_run (EV_A_ EVRUN_NOWAIT); } ev_embed_start (EV_A_ w);}#if 0static voidembed_idle_cb (EV_P_ ev_idle *idle, int revents){ ev_idle_stop (EV_A_ idle);}#endifvoidev_embed_start (EV_P_ ev_embed *w) EV_THROW{ if (expect_false (ev_is_active (w))) return; { EV_P = w->other; assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); } EV_FREQUENT_CHECK; ev_set_priority (&w->io, ev_priority (w)); ev_io_start (EV_A_ &w->io); ev_prepare_init (&w->prepare, embed_prepare_cb); ev_set_priority (&w->prepare, EV_MINPRI); ev_prepare_start (EV_A_ &w->prepare); ev_fork_init (&w->fork, embed_fork_cb); ev_fork_start (EV_A_ &w->fork); /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ ev_start (EV_A_ (W)w, 1); EV_FREQUENT_CHECK;}voidev_embed_stop (EV_P_ ev_embed *w) EV_THROW{ clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; ev_io_stop (EV_A_ &w->io); ev_prepare_stop (EV_A_ &w->prepare); ev_fork_stop (EV_A_ &w->fork); ev_stop (EV_A_ (W)w); EV_FREQUENT_CHECK;}#endif#if EV_FORK_ENABLEvoidev_fork_start (EV_P_ ev_fork *w) EV_THROW{ if (expect_false (ev_is_active (w))) return; EV_FREQUENT_CHECK; ev_start (EV_A_ (W)w, ++forkcnt); array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); forks [forkcnt - 1] = w; EV_FREQUENT_CHECK;}voidev_fork_stop (EV_P_ ev_fork *w) EV_THROW{ clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; { int active = ev_active (w); forks [active - 1] = forks [--forkcnt]; ev_active (forks [active - 1]) = active; } ev_stop (EV_A_ (W)w); EV_FREQUENT_CHECK;}#endif#if EV_CLEANUP_ENABLEvoidev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW{ if (expect_false (ev_is_active (w))) return; EV_FREQUENT_CHECK; ev_start (EV_A_ (W)w, ++cleanupcnt); array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2); cleanups [cleanupcnt - 1] = w; /* cleanup watchers should never keep a refcount on the loop */ ev_unref (EV_A); EV_FREQUENT_CHECK;}voidev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW{ clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; ev_ref (EV_A); { int active = ev_active (w); cleanups [active - 1] = cleanups [--cleanupcnt]; ev_active (cleanups [active - 1]) = active; } ev_stop (EV_A_ (W)w); EV_FREQUENT_CHECK;}#endif#if EV_ASYNC_ENABLEvoidev_async_start (EV_P_ ev_async *w) EV_THROW{ if (expect_false (ev_is_active (w))) return; w->sent = 0; evpipe_init (EV_A); EV_FREQUENT_CHECK; ev_start (EV_A_ (W)w, ++asynccnt); array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); asyncs [asynccnt - 1] = w; EV_FREQUENT_CHECK;}voidev_async_stop (EV_P_ ev_async *w) EV_THROW{ clear_pending (EV_A_ (W)w); if (expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; { int active = ev_active (w); asyncs [active - 1] = asyncs [--asynccnt]; ev_active (asyncs [active - 1]) = active; } ev_stop (EV_A_ (W)w); EV_FREQUENT_CHECK;}voidev_async_send (EV_P_ ev_async *w) EV_THROW{ w->sent = 1; evpipe_write (EV_A_ &async_pending);}#endif/*****************************************************************************/struct ev_once{ ev_io io; ev_timer to; void (*cb)(int revents, void *arg); void *arg;};static voidonce_cb (EV_P_ struct ev_once *once, int revents){ void (*cb)(int revents, void *arg) = once->cb; void *arg = once->arg; ev_io_stop (EV_A_ &once->io); ev_timer_stop (EV_A_ &once->to); ev_free (once); cb (revents, arg);}static voidonce_cb_io (EV_P_ ev_io *w, int revents){ struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)); once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));}static voidonce_cb_to (EV_P_ ev_timer *w, int revents){ struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)); once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));}voidev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW{ struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); if (expect_false (!once)) { cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg); return; } once->cb = cb; once->arg = arg; ev_init (&once->io, once_cb_io); if (fd >= 0) { ev_io_set (&once->io, fd, events); ev_io_start (EV_A_ &once->io); } ev_init (&once->to, once_cb_to); if (timeout >= 0.) { ev_timer_set (&once->to, timeout, 0.); ev_timer_start (EV_A_ &once->to); }}/*****************************************************************************/#if EV_WALK_ENABLEvoid ecb_coldev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW{ int i, j; ev_watcher_list *wl, *wn; if (types & (EV_IO | EV_EMBED)) for (i = 0; i < anfdmax; ++i) for (wl = anfds [i].head; wl; ) { wn = wl->next;#if EV_EMBED_ENABLE if (ev_cb ((ev_io *)wl) == embed_io_cb) { if (types & EV_EMBED) cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io)); } else#endif#if EV_USE_INOTIFY if (ev_cb ((ev_io *)wl) == infy_cb) ; else#endif if ((ev_io *)wl != &pipe_w) if (types & EV_IO) cb (EV_A_ EV_IO, wl); wl = wn; } if (types & (EV_TIMER | EV_STAT)) for (i = timercnt + HEAP0; i-- > HEAP0; )#if EV_STAT_ENABLE /*TODO: timer is not always active*/ if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb) { if (types & EV_STAT) cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer)); } else#endif if (types & EV_TIMER) cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));#if EV_PERIODIC_ENABLE if (types & EV_PERIODIC) for (i = periodiccnt + HEAP0; i-- > HEAP0; ) cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));#endif#if EV_IDLE_ENABLE if (types & EV_IDLE) for (j = NUMPRI; j--; ) for (i = idlecnt [j]; i--; ) cb (EV_A_ EV_IDLE, idles [j][i]);#endif#if EV_FORK_ENABLE if (types & EV_FORK) for (i = forkcnt; i--; ) if (ev_cb (forks [i]) != embed_fork_cb) cb (EV_A_ EV_FORK, forks [i]);#endif#if EV_ASYNC_ENABLE if (types & EV_ASYNC) for (i = asynccnt; i--; ) cb (EV_A_ EV_ASYNC, asyncs [i]);#endif#if EV_PREPARE_ENABLE if (types & EV_PREPARE) for (i = preparecnt; i--; )# if EV_EMBED_ENABLE if (ev_cb (prepares [i]) != embed_prepare_cb)# endif cb (EV_A_ EV_PREPARE, prepares [i]);#endif#if EV_CHECK_ENABLE if (types & EV_CHECK) for (i = checkcnt; i--; ) cb (EV_A_ EV_CHECK, checks [i]);#endif#if EV_SIGNAL_ENABLE if (types & EV_SIGNAL) for (i = 0; i < EV_NSIG - 1; ++i) for (wl = signals [i].head; wl; ) { wn = wl->next; cb (EV_A_ EV_SIGNAL, wl); wl = wn; }#endif#if EV_CHILD_ENABLE if (types & EV_CHILD) for (i = (EV_PID_HASHSIZE); i--; ) for (wl = childs [i]; wl; ) { wn = wl->next; cb (EV_A_ EV_CHILD, wl); wl = wn; }#endif/* EV_STAT 0x00001000 /* stat data changed *//* EV_EMBED 0x00010000 /* embedded event loop needs sweep */}#endif#if EV_MULTIPLICITY #include "ev_wrap.h"#endif |
ev.h:
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278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 | /* libev native API header*/#ifndef EV_H_#define EV_H_#ifdef __cplusplus# define EV_CPP(x) x#else# define EV_CPP(x)#endif#define EV_THROW EV_CPP(throw())EV_CPP(extern "C" {)/*****************************************************************************//* pre-4.0 compatibility */#ifndef EV_COMPAT3# define EV_COMPAT3 1#endif#ifndef EV_FEATURES# if defined __OPTIMIZE_SIZE__# define EV_FEATURES 0x7c# else# define EV_FEATURES 0x7f# endif#endif#define EV_FEATURE_CODE ((EV_FEATURES) & 1)#define EV_FEATURE_DATA ((EV_FEATURES) & 2)#define EV_FEATURE_CONFIG ((EV_FEATURES) & 4)#define EV_FEATURE_API ((EV_FEATURES) & 8)#define EV_FEATURE_WATCHERS ((EV_FEATURES) & 16)#define EV_FEATURE_BACKENDS ((EV_FEATURES) & 32)#define EV_FEATURE_OS ((EV_FEATURES) & 64)/* these priorities are inclusive, higher priorities will be invoked earlier */#ifndef EV_MINPRI# define EV_MINPRI (EV_FEATURE_CONFIG ? -2 : 0)#endif#ifndef EV_MAXPRI# define EV_MAXPRI (EV_FEATURE_CONFIG ? +2 : 0)#endif#ifndef EV_MULTIPLICITY# define EV_MULTIPLICITY EV_FEATURE_CONFIG#endif#ifndef EV_PERIODIC_ENABLE# define EV_PERIODIC_ENABLE EV_FEATURE_WATCHERS#endif#ifndef EV_STAT_ENABLE# define EV_STAT_ENABLE EV_FEATURE_WATCHERS#endif#ifndef EV_PREPARE_ENABLE# define EV_PREPARE_ENABLE EV_FEATURE_WATCHERS#endif#ifndef EV_CHECK_ENABLE# define EV_CHECK_ENABLE EV_FEATURE_WATCHERS#endif#ifndef EV_IDLE_ENABLE# define EV_IDLE_ENABLE EV_FEATURE_WATCHERS#endif#ifndef EV_FORK_ENABLE# define EV_FORK_ENABLE EV_FEATURE_WATCHERS#endif#ifndef EV_CLEANUP_ENABLE# define EV_CLEANUP_ENABLE EV_FEATURE_WATCHERS#endif#ifndef EV_SIGNAL_ENABLE# define EV_SIGNAL_ENABLE EV_FEATURE_WATCHERS#endif#ifndef EV_CHILD_ENABLE# ifdef _WIN32# define EV_CHILD_ENABLE 0# else# define EV_CHILD_ENABLE EV_FEATURE_WATCHERS#endif#endif#ifndef EV_ASYNC_ENABLE# define EV_ASYNC_ENABLE EV_FEATURE_WATCHERS#endif#ifndef EV_EMBED_ENABLE# define EV_EMBED_ENABLE EV_FEATURE_WATCHERS#endif#ifndef EV_WALK_ENABLE# define EV_WALK_ENABLE 0 /* not yet */#endif/*****************************************************************************/#if EV_CHILD_ENABLE && !EV_SIGNAL_ENABLE# undef EV_SIGNAL_ENABLE# define EV_SIGNAL_ENABLE 1#endif/*****************************************************************************/typedef double ev_tstamp;#ifndef EV_ATOMIC_T# include <signal.h># define EV_ATOMIC_T sig_atomic_t volatile#endif#if EV_STAT_ENABLE# ifdef _WIN32# include <time.h># include <sys/types.h># endif# include <sys/stat.h>#endif/* support multiple event loops? */#if EV_MULTIPLICITYstruct ev_loop;# define EV_P struct ev_loop *loop /* a loop as sole parameter in a declaration */# define EV_P_ EV_P, /* a loop as first of multiple parameters */# define EV_A loop /* a loop as sole argument to a function call */# define EV_A_ EV_A, /* a loop as first of multiple arguments */# define EV_DEFAULT_UC ev_default_loop_uc_ () /* the default loop, if initialised, as sole arg */# define EV_DEFAULT_UC_ EV_DEFAULT_UC, /* the default loop as first of multiple arguments */# define EV_DEFAULT ev_default_loop (0) /* the default loop as sole arg */# define EV_DEFAULT_ EV_DEFAULT, /* the default loop as first of multiple arguments */#else# define EV_P void# define EV_P_# define EV_A# define EV_A_# define EV_DEFAULT# define EV_DEFAULT_# define EV_DEFAULT_UC# define EV_DEFAULT_UC_# undef EV_EMBED_ENABLE#endif/* EV_INLINE is used for functions in header files */#if __STDC_VERSION__ >= 199901L || __GNUC__ >= 3# define EV_INLINE static inline#else# define EV_INLINE static#endif#ifdef EV_API_STATIC# define EV_API_DECL static#else# define EV_API_DECL extern#endif/* EV_PROTOTYPES can be used to switch of prototype declarations */#ifndef EV_PROTOTYPES# define EV_PROTOTYPES 1#endif/*****************************************************************************/#define EV_VERSION_MAJOR 4#define EV_VERSION_MINOR 15/* eventmask, revents, events... */enum { EV_UNDEF = (int)0xFFFFFFFF, /* guaranteed to be invalid */ EV_NONE = 0x00, /* no events */ EV_READ = 0x01, /* ev_io detected read will not block */ EV_WRITE = 0x02, /* ev_io detected write will not block */ EV__IOFDSET = 0x80, /* internal use only */ EV_IO = EV_READ, /* alias for type-detection */ EV_TIMER = 0x00000100, /* timer timed out */#if EV_COMPAT3 EV_TIMEOUT = EV_TIMER, /* pre 4.0 API compatibility */#endif EV_PERIODIC = 0x00000200, /* periodic timer timed out */ EV_SIGNAL = 0x00000400, /* signal was received */ EV_CHILD = 0x00000800, /* child/pid had status change */ EV_STAT = 0x00001000, /* stat data changed */ EV_IDLE = 0x00002000, /* event loop is idling */ EV_PREPARE = 0x00004000, /* event loop about to poll */ EV_CHECK = 0x00008000, /* event loop finished poll */ EV_EMBED = 0x00010000, /* embedded event loop needs sweep */ EV_FORK = 0x00020000, /* event loop resumed in child */ EV_CLEANUP = 0x00040000, /* event loop resumed in child */ EV_ASYNC = 0x00080000, /* async intra-loop signal */ EV_CUSTOM = 0x01000000, /* for use by user code */ EV_ERROR = (int)0x80000000 /* sent when an error occurs */};/* can be used to add custom fields to all watchers, while losing binary compatibility */#ifndef EV_COMMON# define EV_COMMON void *data;#endif#ifndef EV_CB_DECLARE# define EV_CB_DECLARE(type) void (*cb)(EV_P_ struct type *w, int revents);#endif#ifndef EV_CB_INVOKE# define EV_CB_INVOKE(watcher,revents) (watcher)->cb (EV_A_ (watcher), (revents))#endif/* not official, do not use */#define EV_CB(type,name) void name (EV_P_ struct ev_ ## type *w, int revents)/* * struct member types: * private: you may look at them, but not change them, * and they might not mean anything to you. * ro: can be read anytime, but only changed when the watcher isn't active. * rw: can be read and modified anytime, even when the watcher is active. * * some internal details that might be helpful for debugging: * * active is either 0, which means the watcher is not active, * or the array index of the watcher (periodics, timers) * or the array index + 1 (most other watchers) * or simply 1 for watchers that aren't in some array. * pending is either 0, in which case the watcher isn't, * or the array index + 1 in the pendings array. */#if EV_MINPRI == EV_MAXPRI# define EV_DECL_PRIORITY#elif !defined (EV_DECL_PRIORITY)# define EV_DECL_PRIORITY int priority;#endif/* shared by all watchers */#define EV_WATCHER(type) \ int active; /* private */ \ int pending; /* private */ \ EV_DECL_PRIORITY /* private */ \ EV_COMMON /* rw */ \ EV_CB_DECLARE (type) /* private */#define EV_WATCHER_LIST(type) \ EV_WATCHER (type) \ struct ev_watcher_list *next; /* private */#define EV_WATCHER_TIME(type) \ EV_WATCHER (type) \ ev_tstamp at; /* private *//* base class, nothing to see here unless you subclass */typedef struct ev_watcher{ EV_WATCHER (ev_watcher)} ev_watcher;/* base class, nothing to see here unless you subclass */typedef struct ev_watcher_list{ EV_WATCHER_LIST (ev_watcher_list)} ev_watcher_list;/* base class, nothing to see here unless you subclass */typedef struct ev_watcher_time{ EV_WATCHER_TIME (ev_watcher_time)} ev_watcher_time;/* invoked when fd is either EV_READable or EV_WRITEable *//* revent EV_READ, EV_WRITE */typedef struct ev_io{ EV_WATCHER_LIST (ev_io) int fd; /* ro */ int events; /* ro */} ev_io;/* invoked after a specific time, repeatable (based on monotonic clock) *//* revent EV_TIMEOUT */typedef struct ev_timer{ EV_WATCHER_TIME (ev_timer) ev_tstamp repeat; /* rw */} ev_timer;/* invoked at some specific time, possibly repeating at regular intervals (based on UTC) *//* revent EV_PERIODIC */typedef struct ev_periodic{ EV_WATCHER_TIME (ev_periodic) ev_tstamp offset; /* rw */ ev_tstamp interval; /* rw */ ev_tstamp (*reschedule_cb)(struct ev_periodic *w, ev_tstamp now) EV_THROW; /* rw */} ev_periodic;/* invoked when the given signal has been received *//* revent EV_SIGNAL */typedef struct ev_signal{ EV_WATCHER_LIST (ev_signal) int signum; /* ro */} ev_signal;/* invoked when sigchld is received and waitpid indicates the given pid *//* revent EV_CHILD *//* does not support priorities */typedef struct ev_child{ EV_WATCHER_LIST (ev_child) int flags; /* private */ int pid; /* ro */ int rpid; /* rw, holds the received pid */ int rstatus; /* rw, holds the exit status, use the macros from sys/wait.h */} ev_child;#if EV_STAT_ENABLE/* st_nlink = 0 means missing file or other error */# ifdef _WIN32typedef struct _stati64 ev_statdata;# elsetypedef struct stat ev_statdata;# endif/* invoked each time the stat data changes for a given path *//* revent EV_STAT */typedef struct ev_stat{ EV_WATCHER_LIST (ev_stat) ev_timer timer; /* private */ ev_tstamp interval; /* ro */ const char *path; /* ro */ ev_statdata prev; /* ro */ ev_statdata attr; /* ro */ int wd; /* wd for inotify, fd for kqueue */} ev_stat;#endif#if EV_IDLE_ENABLE/* invoked when the nothing else needs to be done, keeps the process from blocking *//* revent EV_IDLE */typedef struct ev_idle{ EV_WATCHER (ev_idle)} ev_idle;#endif/* invoked for each run of the mainloop, just before the blocking call *//* you can still change events in any way you like *//* revent EV_PREPARE */typedef struct ev_prepare{ EV_WATCHER (ev_prepare)} ev_prepare;/* invoked for each run of the mainloop, just after the blocking call *//* revent EV_CHECK */typedef struct ev_check{ EV_WATCHER (ev_check)} ev_check;#if EV_FORK_ENABLE/* the callback gets invoked before check in the child process when a fork was detected *//* revent EV_FORK */typedef struct ev_fork{ EV_WATCHER (ev_fork)} ev_fork;#endif#if EV_CLEANUP_ENABLE/* is invoked just before the loop gets destroyed *//* revent EV_CLEANUP */typedef struct ev_cleanup{ EV_WATCHER (ev_cleanup)} ev_cleanup;#endif#if EV_EMBED_ENABLE/* used to embed an event loop inside another *//* the callback gets invoked when the event loop has handled events, and can be 0 */typedef struct ev_embed{ EV_WATCHER (ev_embed) struct ev_loop *other; /* ro */ ev_io io; /* private */ ev_prepare prepare; /* private */ ev_check check; /* unused */ ev_timer timer; /* unused */ ev_periodic periodic; /* unused */ ev_idle idle; /* unused */ ev_fork fork; /* private */#if EV_CLEANUP_ENABLE ev_cleanup cleanup; /* unused */#endif} ev_embed;#endif#if EV_ASYNC_ENABLE/* invoked when somebody calls ev_async_send on the watcher *//* revent EV_ASYNC */typedef struct ev_async{ EV_WATCHER (ev_async) EV_ATOMIC_T sent; /* private */} ev_async;# define ev_async_pending(w) (+(w)->sent)#endif/* the presence of this union forces similar struct layout */union ev_any_watcher{ struct ev_watcher w; struct ev_watcher_list wl; struct ev_io io; struct ev_timer timer; struct ev_periodic periodic; struct ev_signal signal; struct ev_child child;#if EV_STAT_ENABLE struct ev_stat stat;#endif#if EV_IDLE_ENABLE struct ev_idle idle;#endif struct ev_prepare prepare; struct ev_check check;#if EV_FORK_ENABLE struct ev_fork fork;#endif#if EV_CLEANUP_ENABLE struct ev_cleanup cleanup;#endif#if EV_EMBED_ENABLE struct ev_embed embed;#endif#if EV_ASYNC_ENABLE struct ev_async async;#endif};/* flag bits for ev_default_loop and ev_loop_new */enum { /* the default */ EVFLAG_AUTO = 0x00000000U, /* not quite a mask */ /* flag bits */ EVFLAG_NOENV = 0x01000000U, /* do NOT consult environment */ EVFLAG_FORKCHECK = 0x02000000U, /* check for a fork in each iteration */ /* debugging/feature disable */ EVFLAG_NOINOTIFY = 0x00100000U, /* do not attempt to use inotify */#if EV_COMPAT3 EVFLAG_NOSIGFD = 0, /* compatibility to pre-3.9 */#endif EVFLAG_SIGNALFD = 0x00200000U, /* attempt to use signalfd */ EVFLAG_NOSIGMASK = 0x00400000U /* avoid modifying the signal mask */};/* method bits to be ored together */enum { EVBACKEND_SELECT = 0x00000001U, /* about anywhere */ EVBACKEND_POLL = 0x00000002U, /* !win */ EVBACKEND_EPOLL = 0x00000004U, /* linux */ EVBACKEND_KQUEUE = 0x00000008U, /* bsd */ EVBACKEND_DEVPOLL = 0x00000010U, /* solaris 8 */ /* NYI */ EVBACKEND_PORT = 0x00000020U, /* solaris 10 */ EVBACKEND_ALL = 0x0000003FU, /* all known backends */ EVBACKEND_MASK = 0x0000FFFFU /* all future backends */};#if EV_PROTOTYPESEV_API_DECL int ev_version_major (void) EV_THROW;EV_API_DECL int ev_version_minor (void) EV_THROW;EV_API_DECL unsigned int ev_supported_backends (void) EV_THROW;EV_API_DECL unsigned int ev_recommended_backends (void) EV_THROW;EV_API_DECL unsigned int ev_embeddable_backends (void) EV_THROW;EV_API_DECL ev_tstamp ev_time (void) EV_THROW;EV_API_DECL void ev_sleep (ev_tstamp delay) EV_THROW; /* sleep for a while *//* Sets the allocation function to use, works like realloc. * It is used to allocate and free memory. * If it returns zero when memory needs to be allocated, the library might abort * or take some potentially destructive action. * The default is your system realloc function. */EV_API_DECL void ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW;/* set the callback function to call on a * retryable syscall error * (such as failed select, poll, epoll_wait) */EV_API_DECL void ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW;#if EV_MULTIPLICITY/* the default loop is the only one that handles signals and child watchers *//* you can call this as often as you like */EV_API_DECL struct ev_loop *ev_default_loop (unsigned int flags EV_CPP (= 0)) EV_THROW;#ifdef EV_API_STATICEV_API_DECL struct ev_loop *ev_default_loop_ptr;#endifEV_INLINE struct ev_loop *ev_default_loop_uc_ (void) EV_THROW{ extern struct ev_loop *ev_default_loop_ptr; return ev_default_loop_ptr;}EV_INLINE intev_is_default_loop (EV_P) EV_THROW{ return EV_A == EV_DEFAULT_UC;}/* create and destroy alternative loops that don't handle signals */EV_API_DECL struct ev_loop *ev_loop_new (unsigned int flags EV_CPP (= 0)) EV_THROW;EV_API_DECL ev_tstamp ev_now (EV_P) EV_THROW; /* time w.r.t. timers and the eventloop, updated after each poll */#elseEV_API_DECL int ev_default_loop (unsigned int flags EV_CPP (= 0)) EV_THROW; /* returns true when successful */EV_API_DECL ev_tstamp ev_rt_now;EV_INLINE ev_tstampev_now (void) EV_THROW{ return ev_rt_now;}/* looks weird, but ev_is_default_loop (EV_A) still works if this exists */EV_INLINE intev_is_default_loop (void) EV_THROW{ return 1;}#endif /* multiplicity *//* destroy event loops, also works for the default loop */EV_API_DECL void ev_loop_destroy (EV_P);/* this needs to be called after fork, to duplicate the loop *//* when you want to re-use it in the child *//* you can call it in either the parent or the child *//* you can actually call it at any time, anywhere :) */EV_API_DECL void ev_loop_fork (EV_P) EV_THROW;EV_API_DECL unsigned int ev_backend (EV_P) EV_THROW; /* backend in use by loop */EV_API_DECL void ev_now_update (EV_P) EV_THROW; /* update event loop time */#if EV_WALK_ENABLE/* walk (almost) all watchers in the loop of a given type, invoking the *//* callback on every such watcher. The callback might stop the watcher, *//* but do nothing else with the loop */EV_API_DECL void ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW;#endif#endif /* prototypes *//* ev_run flags values */enum { EVRUN_NOWAIT = 1, /* do not block/wait */ EVRUN_ONCE = 2 /* block *once* only */};/* ev_break how values */enum { EVBREAK_CANCEL = 0, /* undo unloop */ EVBREAK_ONE = 1, /* unloop once */ EVBREAK_ALL = 2 /* unloop all loops */};#if EV_PROTOTYPESEV_API_DECL int ev_run (EV_P_ int flags EV_CPP (= 0));EV_API_DECL void ev_break (EV_P_ int how EV_CPP (= EVBREAK_ONE)) EV_THROW; /* break out of the loop *//* * ref/unref can be used to add or remove a refcount on the mainloop. every watcher * keeps one reference. if you have a long-running watcher you never unregister that * should not keep ev_loop from running, unref() after starting, and ref() before stopping. */EV_API_DECL void ev_ref (EV_P) EV_THROW;EV_API_DECL void ev_unref (EV_P) EV_THROW;/* * convenience function, wait for a single event, without registering an event watcher * if timeout is < 0, do wait indefinitely */EV_API_DECL void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW;# if EV_FEATURE_APIEV_API_DECL unsigned int ev_iteration (EV_P) EV_THROW; /* number of loop iterations */EV_API_DECL unsigned int ev_depth (EV_P) EV_THROW; /* #ev_loop enters - #ev_loop leaves */EV_API_DECL void ev_verify (EV_P) EV_THROW; /* abort if loop data corrupted */EV_API_DECL void ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW; /* sleep at least this time, default 0 */EV_API_DECL void ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW; /* sleep at least this time, default 0 *//* advanced stuff for threading etc. support, see docs */EV_API_DECL void ev_set_userdata (EV_P_ void *data) EV_THROW;EV_API_DECL void *ev_userdata (EV_P) EV_THROW;EV_API_DECL void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW;EV_API_DECL void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P) EV_THROW) EV_THROW;EV_API_DECL unsigned int ev_pending_count (EV_P) EV_THROW; /* number of pending events, if any */EV_API_DECL void ev_invoke_pending (EV_P); /* invoke all pending watchers *//* * stop/start the timer handling. */EV_API_DECL void ev_suspend (EV_P) EV_THROW;EV_API_DECL void ev_resume (EV_P) EV_THROW;#endif#endif/* these may evaluate ev multiple times, and the other arguments at most once *//* either use ev_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */#define ev_init(ev,cb_) do { \ ((ev_watcher *)(void *)(ev))->active = \ ((ev_watcher *)(void *)(ev))->pending = 0; \ ev_set_priority ((ev), 0); \ ev_set_cb ((ev), cb_); \} while (0)#define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_) | EV__IOFDSET; } while (0)#define ev_timer_set(ev,after_,repeat_) do { ((ev_watcher_time *)(ev))->at = (after_); (ev)->repeat = (repeat_); } while (0)#define ev_periodic_set(ev,ofs_,ival_,rcb_) do { (ev)->offset = (ofs_); (ev)->interval = (ival_); (ev)->reschedule_cb = (rcb_); } while (0)#define ev_signal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0)#define ev_child_set(ev,pid_,trace_) do { (ev)->pid = (pid_); (ev)->flags = !!(trace_); } while (0)#define ev_stat_set(ev,path_,interval_) do { (ev)->path = (path_); (ev)->interval = (interval_); (ev)->wd = -2; } while (0)#define ev_idle_set(ev) /* nop, yes, this is a serious in-joke */#define ev_prepare_set(ev) /* nop, yes, this is a serious in-joke */#define ev_check_set(ev) /* nop, yes, this is a serious in-joke */#define ev_embed_set(ev,other_) do { (ev)->other = (other_); } while (0)#define ev_fork_set(ev) /* nop, yes, this is a serious in-joke */#define ev_cleanup_set(ev) /* nop, yes, this is a serious in-joke */#define ev_async_set(ev) /* nop, yes, this is a serious in-joke */#define ev_io_init(ev,cb,fd,events) do { ev_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0)#define ev_timer_init(ev,cb,after,repeat) do { ev_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0)#define ev_periodic_init(ev,cb,ofs,ival,rcb) do { ev_init ((ev), (cb)); ev_periodic_set ((ev),(ofs),(ival),(rcb)); } while (0)#define ev_signal_init(ev,cb,signum) do { ev_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0)#define ev_child_init(ev,cb,pid,trace) do { ev_init ((ev), (cb)); ev_child_set ((ev),(pid),(trace)); } while (0)#define ev_stat_init(ev,cb,path,interval) do { ev_init ((ev), (cb)); ev_stat_set ((ev),(path),(interval)); } while (0)#define ev_idle_init(ev,cb) do { ev_init ((ev), (cb)); ev_idle_set ((ev)); } while (0)#define ev_prepare_init(ev,cb) do { ev_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0)#define ev_check_init(ev,cb) do { ev_init ((ev), (cb)); ev_check_set ((ev)); } while (0)#define ev_embed_init(ev,cb,other) do { ev_init ((ev), (cb)); ev_embed_set ((ev),(other)); } while (0)#define ev_fork_init(ev,cb) do { ev_init ((ev), (cb)); ev_fork_set ((ev)); } while (0)#define ev_cleanup_init(ev,cb) do { ev_init ((ev), (cb)); ev_cleanup_set ((ev)); } while (0)#define ev_async_init(ev,cb) do { ev_init ((ev), (cb)); ev_async_set ((ev)); } while (0)#define ev_is_pending(ev) (0 + ((ev_watcher *)(void *)(ev))->pending) /* ro, true when watcher is waiting for callback invocation */#define ev_is_active(ev) (0 + ((ev_watcher *)(void *)(ev))->active) /* ro, true when the watcher has been started */#define ev_cb(ev) (ev)->cb /* rw */#if EV_MINPRI == EV_MAXPRI# define ev_priority(ev) ((ev), EV_MINPRI)# define ev_set_priority(ev,pri) ((ev), (pri))#else# define ev_priority(ev) (+(((ev_watcher *)(void *)(ev))->priority))# define ev_set_priority(ev,pri) ( (ev_watcher *)(void *)(ev))->priority = (pri)#endif#define ev_periodic_at(ev) (+((ev_watcher_time *)(ev))->at)#ifndef ev_set_cb# define ev_set_cb(ev,cb_) ev_cb (ev) = (cb_)#endif/* stopping (enabling, adding) a watcher does nothing if it is already running *//* stopping (disabling, deleting) a watcher does nothing unless its already running */#if EV_PROTOTYPES/* feeds an event into a watcher as if the event actually occurred *//* accepts any ev_watcher type */EV_API_DECL void ev_feed_event (EV_P_ void *w, int revents) EV_THROW;EV_API_DECL void ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW;#if EV_SIGNAL_ENABLEEV_API_DECL void ev_feed_signal (int signum) EV_THROW;EV_API_DECL void ev_feed_signal_event (EV_P_ int signum) EV_THROW;#endifEV_API_DECL void ev_invoke (EV_P_ void *w, int revents);EV_API_DECL int ev_clear_pending (EV_P_ void *w) EV_THROW;EV_API_DECL void ev_io_start (EV_P_ ev_io *w) EV_THROW;EV_API_DECL void ev_io_stop (EV_P_ ev_io *w) EV_THROW;EV_API_DECL void ev_timer_start (EV_P_ ev_timer *w) EV_THROW;EV_API_DECL void ev_timer_stop (EV_P_ ev_timer *w) EV_THROW;/* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */EV_API_DECL void ev_timer_again (EV_P_ ev_timer *w) EV_THROW;/* return remaining time */EV_API_DECL ev_tstamp ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW;#if EV_PERIODIC_ENABLEEV_API_DECL void ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW;EV_API_DECL void ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW;EV_API_DECL void ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW;#endif/* only supported in the default loop */#if EV_SIGNAL_ENABLEEV_API_DECL void ev_signal_start (EV_P_ ev_signal *w) EV_THROW;EV_API_DECL void ev_signal_stop (EV_P_ ev_signal *w) EV_THROW;#endif/* only supported in the default loop */# if EV_CHILD_ENABLEEV_API_DECL void ev_child_start (EV_P_ ev_child *w) EV_THROW;EV_API_DECL void ev_child_stop (EV_P_ ev_child *w) EV_THROW;# endif# if EV_STAT_ENABLEEV_API_DECL void ev_stat_start (EV_P_ ev_stat *w) EV_THROW;EV_API_DECL void ev_stat_stop (EV_P_ ev_stat *w) EV_THROW;EV_API_DECL void ev_stat_stat (EV_P_ ev_stat *w) EV_THROW;# endif# if EV_IDLE_ENABLEEV_API_DECL void ev_idle_start (EV_P_ ev_idle *w) EV_THROW;EV_API_DECL void ev_idle_stop (EV_P_ ev_idle *w) EV_THROW;# endif#if EV_PREPARE_ENABLEEV_API_DECL void ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW;EV_API_DECL void ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW;#endif#if EV_CHECK_ENABLEEV_API_DECL void ev_check_start (EV_P_ ev_check *w) EV_THROW;EV_API_DECL void ev_check_stop (EV_P_ ev_check *w) EV_THROW;#endif# if EV_FORK_ENABLEEV_API_DECL void ev_fork_start (EV_P_ ev_fork *w) EV_THROW;EV_API_DECL void ev_fork_stop (EV_P_ ev_fork *w) EV_THROW;# endif# if EV_CLEANUP_ENABLEEV_API_DECL void ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW;EV_API_DECL void ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW;# endif# if EV_EMBED_ENABLE/* only supported when loop to be embedded is in fact embeddable */EV_API_DECL void ev_embed_start (EV_P_ ev_embed *w) EV_THROW;EV_API_DECL void ev_embed_stop (EV_P_ ev_embed *w) EV_THROW;EV_API_DECL void ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW;# endif# if EV_ASYNC_ENABLEEV_API_DECL void ev_async_start (EV_P_ ev_async *w) EV_THROW;EV_API_DECL void ev_async_stop (EV_P_ ev_async *w) EV_THROW;EV_API_DECL void ev_async_send (EV_P_ ev_async *w) EV_THROW;# endif#if EV_COMPAT3 #define EVLOOP_NONBLOCK EVRUN_NOWAIT #define EVLOOP_ONESHOT EVRUN_ONCE #define EVUNLOOP_CANCEL EVBREAK_CANCEL #define EVUNLOOP_ONE EVBREAK_ONE #define EVUNLOOP_ALL EVBREAK_ALL #if EV_PROTOTYPES EV_INLINE void ev_loop (EV_P_ int flags) { ev_run (EV_A_ flags); } EV_INLINE void ev_unloop (EV_P_ int how ) { ev_break (EV_A_ how ); } EV_INLINE void ev_default_destroy (void) { ev_loop_destroy (EV_DEFAULT); } EV_INLINE void ev_default_fork (void) { ev_loop_fork (EV_DEFAULT); } #if EV_FEATURE_API EV_INLINE unsigned int ev_loop_count (EV_P) { return ev_iteration (EV_A); } EV_INLINE unsigned int ev_loop_depth (EV_P) { return ev_depth (EV_A); } EV_INLINE void ev_loop_verify (EV_P) { ev_verify (EV_A); } #endif #endif#else typedef struct ev_loop ev_loop;#endif#endifEV_CPP(})#endif |
event.h
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 | /* * libevent compatibility header, only core events supported * * Copyright (c) 2007,2008,2010,2012 Marc Alexander Lehmann <libev@schmorp.de> * All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * * Alternatively, the contents of this file may be used under the terms of * the GNU General Public License ("GPL") version 2 or any later version, * in which case the provisions of the GPL are applicable instead of * the above. If you wish to allow the use of your version of this file * only under the terms of the GPL and not to allow others to use your * version of this file under the BSD license, indicate your decision * by deleting the provisions above and replace them with the notice * and other provisions required by the GPL. If you do not delete the * provisions above, a recipient may use your version of this file under * either the BSD or the GPL. */#ifndef EVENT_H_#define EVENT_H_#ifdef EV_H# include EV_H#else# include "ev.h"#endif#ifndef EVLOOP_NONBLOCK# define EVLOOP_NONBLOCK EVRUN_NOWAIT#endif#ifndef EVLOOP_ONESHOT# define EVLOOP_ONESHOT EVRUN_ONCE#endif#ifndef EV_TIMEOUT# define EV_TIMEOUT EV_TIMER#endif#ifdef __cplusplusextern "C" {#endif/* we need sys/time.h for struct timeval only */#if !defined (WIN32) || defined (__MINGW32__)# include <time.h> /* mingw seems to need this, for whatever reason */# include <sys/time.h>#endifstruct event_base;#define EVLIST_TIMEOUT 0x01#define EVLIST_INSERTED 0x02#define EVLIST_SIGNAL 0x04#define EVLIST_ACTIVE 0x08#define EVLIST_INTERNAL 0x10#define EVLIST_INIT 0x80typedef void (*event_callback_fn)(int, short, void *);struct event{ /* libev watchers we map onto */ union { struct ev_io io; struct ev_signal sig; } iosig; struct ev_timer to; /* compatibility slots */ struct event_base *ev_base; event_callback_fn ev_callback; void *ev_arg; int ev_fd; int ev_pri; int ev_res; int ev_flags; short ev_events;};event_callback_fn event_get_callback (const struct event *ev);#define EV_READ EV_READ#define EV_WRITE EV_WRITE#define EV_PERSIST 0x10#define EV_ET 0x20 /* nop */#define EVENT_SIGNAL(ev) ((int) (ev)->ev_fd)#define EVENT_FD(ev) ((int) (ev)->ev_fd)#define event_initialized(ev) ((ev)->ev_flags & EVLIST_INIT)#define evtimer_add(ev,tv) event_add (ev, tv)#define evtimer_set(ev,cb,data) event_set (ev, -1, 0, cb, data)#define evtimer_del(ev) event_del (ev)#define evtimer_pending(ev,tv) event_pending (ev, EV_TIMEOUT, tv)#define evtimer_initialized(ev) event_initialized (ev)#define timeout_add(ev,tv) evtimer_add (ev, tv)#define timeout_set(ev,cb,data) evtimer_set (ev, cb, data)#define timeout_del(ev) evtimer_del (ev)#define timeout_pending(ev,tv) evtimer_pending (ev, tv)#define timeout_initialized(ev) evtimer_initialized (ev)#define signal_add(ev,tv) event_add (ev, tv)#define signal_set(ev,sig,cb,data) event_set (ev, sig, EV_SIGNAL | EV_PERSIST, cb, data)#define signal_del(ev) event_del (ev)#define signal_pending(ev,tv) event_pending (ev, EV_SIGNAL, tv)#define signal_initialized(ev) event_initialized (ev)const char *event_get_version (void);const char *event_get_method (void);void *event_init (void);void event_base_free (struct event_base *base);#define EVLOOP_ONCE EVLOOP_ONESHOTint event_loop (int);int event_loopexit (struct timeval *tv);int event_dispatch (void);#define _EVENT_LOG_DEBUG 0#define _EVENT_LOG_MSG 1#define _EVENT_LOG_WARN 2#define _EVENT_LOG_ERR 3typedef void (*event_log_cb)(int severity, const char *msg);void event_set_log_callback(event_log_cb cb);void event_set (struct event *ev, int fd, short events, void (*cb)(int, short, void *), void *arg);int event_once (int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv);int event_add (struct event *ev, struct timeval *tv);int event_del (struct event *ev);void event_active (struct event *ev, int res, short ncalls); /* ncalls is being ignored */int event_pending (struct event *ev, short, struct timeval *tv);int event_priority_init (int npri);int event_priority_set (struct event *ev, int pri);struct event_base *event_base_new (void);const char *event_base_get_method (const struct event_base *);int event_base_set (struct event_base *base, struct event *ev);int event_base_loop (struct event_base *base, int);int event_base_loopexit (struct event_base *base, struct timeval *tv);int event_base_dispatch (struct event_base *base);int event_base_once (struct event_base *base, int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv);int event_base_priority_init (struct event_base *base, int fd);/* next line is different in the libevent+libev version *//*libevent-include*/#ifdef __cplusplus}#endif#endif |
event.c
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 | /* * libevent compatibility layer * * Copyright (c) 2007,2008,2009,2010,2012 Marc Alexander Lehmann <libev@schmorp.de> * All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * * Alternatively, the contents of this file may be used under the terms of * the GNU General Public License ("GPL") version 2 or any later version, * in which case the provisions of the GPL are applicable instead of * the above. If you wish to allow the use of your version of this file * only under the terms of the GPL and not to allow others to use your * version of this file under the BSD license, indicate your decision * by deleting the provisions above and replace them with the notice * and other provisions required by the GPL. If you do not delete the * provisions above, a recipient may use your version of this file under * either the BSD or the GPL. */#include <stddef.h>#include <stdlib.h>#include <assert.h>#ifdef EV_EVENT_H# include EV_EVENT_H#else# include "event.h"#endif#if EV_MULTIPLICITY# define dLOOPev struct ev_loop *loop = (struct ev_loop *)ev->ev_base# define dLOOPbase struct ev_loop *loop = (struct ev_loop *)base#else# define dLOOPev# define dLOOPbase#endif/* never accessed, will always be cast from/to ev_loop */struct event_base{ int dummy;};static struct event_base *ev_x_cur;static ev_tstampev_tv_get (struct timeval *tv){ if (tv) { ev_tstamp after = tv->tv_sec + tv->tv_usec * 1e-6; return after ? after : 1e-6; } else return -1.;}#define EVENT_STRINGIFY(s) # s#define EVENT_VERSION(a,b) EVENT_STRINGIFY (a) "." EVENT_STRINGIFY (b)const char *event_get_version (void){ /* returns ABI, not API or library, version */ return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR);}const char *event_get_method (void){ return "libev";}void *event_init (void){#if EV_MULTIPLICITY if (ev_x_cur) ev_x_cur = (struct event_base *)ev_loop_new (EVFLAG_AUTO); else ev_x_cur = (struct event_base *)ev_default_loop (EVFLAG_AUTO);#else assert (("libev: multiple event bases not supported when not compiled with EV_MULTIPLICITY", !ev_x_cur)); ev_x_cur = (struct event_base *)(long)ev_default_loop (EVFLAG_AUTO);#endif return ev_x_cur;}const char *event_base_get_method (const struct event_base *base){ return "libev";}struct event_base *event_base_new (void){#if EV_MULTIPLICITY return (struct event_base *)ev_loop_new (EVFLAG_AUTO);#else assert (("libev: multiple event bases not supported when not compiled with EV_MULTIPLICITY")); return NULL;#endif}void event_base_free (struct event_base *base){ dLOOPbase;#if EV_MULTIPLICITY if (!ev_is_default_loop (loop)) ev_loop_destroy (loop);#endif}int event_dispatch (void){ return event_base_dispatch (ev_x_cur);}#ifdef EV_STANDALONEvoid event_set_log_callback (event_log_cb cb){ /* nop */}#endifint event_loop (int flags){ return event_base_loop (ev_x_cur, flags);}int event_loopexit (struct timeval *tv){ return event_base_loopexit (ev_x_cur, tv);}event_callback_fn event_get_callback(const struct event *ev){ return ev->ev_callback;}static voidev_x_cb (struct event *ev, int revents){ revents &= EV_READ | EV_WRITE | EV_TIMER | EV_SIGNAL; ev->ev_res = revents; ev->ev_callback (ev->ev_fd, (short)revents, ev->ev_arg);}static voidev_x_cb_sig (EV_P_ struct ev_signal *w, int revents){ struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.sig)); if (revents & EV_ERROR) event_del (ev); ev_x_cb (ev, revents);}static voidev_x_cb_io (EV_P_ struct ev_io *w, int revents){ struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.io)); if ((revents & EV_ERROR) || !(ev->ev_events & EV_PERSIST)) event_del (ev); ev_x_cb (ev, revents);}static voidev_x_cb_to (EV_P_ struct ev_timer *w, int revents){ struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, to)); event_del (ev); ev_x_cb (ev, revents);}void event_set (struct event *ev, int fd, short events, void (*cb)(int, short, void *), void *arg){ if (events & EV_SIGNAL) ev_init (&ev->iosig.sig, ev_x_cb_sig); else ev_init (&ev->iosig.io, ev_x_cb_io); ev_init (&ev->to, ev_x_cb_to); ev->ev_base = ev_x_cur; /* not threadsafe, but it's how libevent works */ ev->ev_fd = fd; ev->ev_events = events; ev->ev_pri = 0; ev->ev_callback = cb; ev->ev_arg = arg; ev->ev_res = 0; ev->ev_flags = EVLIST_INIT;}int event_once (int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv){ return event_base_once (ev_x_cur, fd, events, cb, arg, tv);}int event_add (struct event *ev, struct timeval *tv){ dLOOPev; if (ev->ev_events & EV_SIGNAL) { if (!ev_is_active (&ev->iosig.sig)) { ev_signal_set (&ev->iosig.sig, ev->ev_fd); ev_signal_start (EV_A_ &ev->iosig.sig); ev->ev_flags |= EVLIST_SIGNAL; } } else if (ev->ev_events & (EV_READ | EV_WRITE)) { if (!ev_is_active (&ev->iosig.io)) { ev_io_set (&ev->iosig.io, ev->ev_fd, ev->ev_events & (EV_READ | EV_WRITE)); ev_io_start (EV_A_ &ev->iosig.io); ev->ev_flags |= EVLIST_INSERTED; } } if (tv) { ev->to.repeat = ev_tv_get (tv); ev_timer_again (EV_A_ &ev->to); ev->ev_flags |= EVLIST_TIMEOUT; } else { ev_timer_stop (EV_A_ &ev->to); ev->ev_flags &= ~EVLIST_TIMEOUT; } ev->ev_flags |= EVLIST_ACTIVE; return 0;}int event_del (struct event *ev){ dLOOPev; if (ev->ev_events & EV_SIGNAL) ev_signal_stop (EV_A_ &ev->iosig.sig); else if (ev->ev_events & (EV_READ | EV_WRITE)) ev_io_stop (EV_A_ &ev->iosig.io); if (ev_is_active (&ev->to)) ev_timer_stop (EV_A_ &ev->to); ev->ev_flags = EVLIST_INIT; return 0;}void event_active (struct event *ev, int res, short ncalls){ dLOOPev; if (res & EV_TIMEOUT) ev_feed_event (EV_A_ &ev->to, res & EV_TIMEOUT); if (res & EV_SIGNAL) ev_feed_event (EV_A_ &ev->iosig.sig, res & EV_SIGNAL); if (res & (EV_READ | EV_WRITE)) ev_feed_event (EV_A_ &ev->iosig.io, res & (EV_READ | EV_WRITE));}int event_pending (struct event *ev, short events, struct timeval *tv){ short revents = 0; dLOOPev; if (ev->ev_events & EV_SIGNAL) { /* sig */ if (ev_is_active (&ev->iosig.sig) || ev_is_pending (&ev->iosig.sig)) revents |= EV_SIGNAL; } else if (ev->ev_events & (EV_READ | EV_WRITE)) { /* io */ if (ev_is_active (&ev->iosig.io) || ev_is_pending (&ev->iosig.io)) revents |= ev->ev_events & (EV_READ | EV_WRITE); } if (ev->ev_events & EV_TIMEOUT || ev_is_active (&ev->to) || ev_is_pending (&ev->to)) { revents |= EV_TIMEOUT; if (tv) { ev_tstamp at = ev_now (EV_A); tv->tv_sec = (long)at; tv->tv_usec = (long)((at - (ev_tstamp)tv->tv_sec) * 1e6); } } return events & revents;}int event_priority_init (int npri){ return event_base_priority_init (ev_x_cur, npri);}int event_priority_set (struct event *ev, int pri){ ev->ev_pri = pri; return 0;}int event_base_set (struct event_base *base, struct event *ev){ ev->ev_base = base; return 0;}int event_base_loop (struct event_base *base, int flags){ dLOOPbase; return !ev_run (EV_A_ flags);}int event_base_dispatch (struct event_base *base){ return event_base_loop (base, 0);}static voidev_x_loopexit_cb (int revents, void *base){ dLOOPbase; ev_break (EV_A_ EVBREAK_ONE);}int event_base_loopexit (struct event_base *base, struct timeval *tv){ ev_tstamp after = ev_tv_get (tv); dLOOPbase; ev_once (EV_A_ -1, 0, after >= 0. ? after : 0., ev_x_loopexit_cb, (void *)base); return 0;}struct ev_x_once{ int fd; void (*cb)(int, short, void *); void *arg;};static voidev_x_once_cb (int revents, void *arg){ struct ev_x_once *once = (struct ev_x_once *)arg; once->cb (once->fd, (short)revents, once->arg); free (once);}int event_base_once (struct event_base *base, int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv){ struct ev_x_once *once = (struct ev_x_once *)malloc (sizeof (struct ev_x_once)); dLOOPbase; if (!once) return -1; once->fd = fd; once->cb = cb; once->arg = arg; ev_once (EV_A_ fd, events & (EV_READ | EV_WRITE), ev_tv_get (tv), ev_x_once_cb, (void *)once); return 0;}int event_base_priority_init (struct event_base *base, int npri){ /*dLOOPbase;*/ return 0;} |
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