linux下的线程学习（二）
1 #include <iostream> 2 #include <pthread.h> 3 4 void cleanup(void *arg) { 5 6 printf("cleanup: %s\n", (char*)arg); 7 } 8 9 void* thr_fn1(void *arg) { 10 11 printf("thread1 start\n"); 12 pthread_cleanup_push(cleanup, (void*)"thread 1 first handler"); 13 pthread_cleanup_push(cleanup, (void*)"thread 1 second handler"); 14 printf("thread1 push complete.\n"); 15 16 if(arg) { 17 return ((void*)1); 18 } 19 20 pthread_cleanup_pop(1); 21 pthread_cleanup_pop(1); 22 23 return ((void*)1); 24 } 25 26 void* thr_fn2(void *arg) { 27 28 printf("thread2 start\n"); 29 pthread_cleanup_push(cleanup, (void*)"thread 2 first handler"); 30 pthread_cleanup_push(cleanup, (void*)"thread 2 second handler"); 31 printf("thread2 push complete.\n"); 32 33 if(arg) { 34 pthread_exit((void*)2); 35 } 36 37 pthread_cleanup_pop(1); 38 pthread_cleanup_pop(1); 39 40 pthread_exit((void*)2); 41 } 42 43 int main() { 44 45 int err; 46 pthread_t tid1,tid2; 47 void *tret; 48 49 err = pthread_create(&tid1, NULL, thr_fn1, NULL); 50 if(err != 0) 51 printf("can't create thread 1: %s\n", strerror(err)); 52 53 err = pthread_create(&tid2, NULL, thr_fn2, NULL); 54 if(err != 0) 55 printf("can't create thread 2: %s\n", strerror(err)); 56 57 err = pthread_join(tid1, &tret); 58 if(err != 0) 59 printf("can't join with thread 1: %s\n", strerror(err)); 60 printf("thread 1 exit code %d\n", (int*)tret ); 61 62 err = pthread_join(tid2, &tret); 63 if(err != 0) 64 printf("can't join with thread 2: %s\n", strerror(err)); 65 printf("thread 2 exit code %d\n", (int*)tret ); 66 67 return 0; 68 }
使用pthread_cleanup_push pthread_cleanup_pop完成线程退出函数自动调用的功能;
