IOCP
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/****************************************************************** * * Copyright (c) 2008, xxxxx有限公司 * All rights reserved. * * 文件名称:IOCPHeader.h * 摘 要: IOCP定义文件 * * 当前版本:1.0 * 作 者:吴会然 * 完成日期:2008-9-16 * * 取代版本: * 原 作者: * 完成日期: * ******************************************************************/ #ifndef _IOCPHEADER_H_20080916_ #define _IOCPHEADER_H_20080916_ #include <WINSOCK2.H> #include <windows.h> #define BUFFER_SIZE 1024 /****************************************************************** * per_handle 数据 *******************************************************************/ typedef struct _PER_HANDLE_DATA { SOCKET s; // 对应的套接字句柄 sockaddr_in addr; // 对方的地址 }PER_HANDLE_DATA, *PPER_HANDLE_DATA; /****************************************************************** * per_io 数据 *******************************************************************/ typedef struct _PER_IO_DATA { OVERLAPPED ol; // 重叠结构 char buf[BUFFER_SIZE]; // 数据缓冲区 int nOperationType; // 操作类型 #define OP_READ 1 #define OP_WRITE 2 #define OP_ACCEPT 3 }PER_IO_DATA, *PPER_IO_DATA; #endif /****************************************************************** * * Copyright (c) 2008, xxxxx有限公司 * All rights reserved. * * 文件名称:main.cpp * 摘 要: iocp demo * * 当前版本:1.0 * 作 者:吴会然 * 完成日期:2008-9-16 * * 取代版本: * 原 作者: * 完成日期: * ******************************************************************/ #include <iostream> #include <string> #include "IOCPHeader.h" using namespace std; DWORD WINAPI ServerThread( LPVOID lpParam ); int main( int argc, char *argv[] ) { ////////////////////////////////////////////////////////////////////////// WSADATA wsaData; if( 0 != WSAStartup( MAKEWORD( 2, 2 ), &wsaData ) ) { printf( "Using %s (Status:%s)/n", wsaData.szDescription, wsaData.szSystemStatus ); printf( "with API versions: %d.%d to %d.%d", LOBYTE( wsaData.wVersion), HIBYTE( wsaData.wVersion ), LOBYTE( wsaData.wHighVersion), HIBYTE( wsaData.wHighVersion) ); return -1; } else { printf("Windows sockets 2.2 startup/n"); } ////////////////////////////////////////////////////////////////////////// int nPort = 20055; // 创建完成端口对象 // 创建工作线程处理完成端口对象的事件 HANDLE hIocp = ::CreateIoCompletionPort( INVALID_HANDLE_VALUE, 0, 0, 0 ); ::CreateThread( NULL, 0, ServerThread, (LPVOID)hIocp, 0, 0 ); // 创建监听套接字,绑定本地端口,开始监听 SOCKET sListen = ::socket( AF_INET,-SOCK_STREAM, 0 ); SOCKADDR_IN addr; addr.sin_family = AF_INET; addr.sin_port = ::htons( nPort ); addr.sin_addr.S_un.S_addr = INADDR_ANY; ::bind( sListen, (sockaddr *)&addr, sizeof( addr ) ); ::listen( sListen, 5 ); printf( "iocp demo start....../n" ); // 循环处理到来的请求 while ( TRUE ) { // 等待接受未决的连接请求 SOCKADDR_IN saRemote; int nRemoteLen = sizeof( saRemote ); SOCKET sRemote = ::accept( sListen, (sockaddr *)&saRemote, &nRemoteLen ); // 接受到新连接之后,为它创建一个per_handle数据,并将他们关联到完成端口对象 PPER_HANDLE_DATA pPerHandle = ( PPER_HANDLE_DATA )::GlobalAlloc( GPTR, sizeof( PPER_HANDLE_DATA ) ); if( pPerHandle == NULL ) { break; } pPerHandle->s = sRemote; memcpy( &pPerHandle->addr, &saRemote, nRemoteLen ); ::CreateIoCompletionPort( ( HANDLE)pPerHandle->s, hIocp, (DWORD)pPerHandle, 0 ); // 投递一个接受请求 PPER_IO_DATA pIoData = ( PPER_IO_DATA )::GlobalAlloc( GPTR, sizeof( PPER_IO_DATA ) ); if( pIoData == NULL ) { break; } pIoData->nOperationType = OP_READ; WSABUF buf; buf.buf = pIoData->buf; buf.len = BUFFER_SIZE; DWORD dwRecv = 0; DWORD dwFlags = 0; ::WSARecv( pPerHandle->s, &buf, 1, &dwRecv, &dwFlags, &pIoData->ol, NULL ); } ////////////////////////////////////////////////////////////////////////// ERROR_PROC: WSACleanup(); ////////////////////////////////////////////////////////////////////////// return 0; } /****************************************************************** * 函数介绍:处理完成端口对象事件的线程 * 输入参数: * 输出参数: * 返回值 : *******************************************************************/ DWORD WINAPI ServerThread( LPVOID lpParam ) { HANDLE hIocp = ( HANDLE )lpParam; if( hIocp == NULL ) { return -1; } DWORD dwTrans = 0; PPER_HANDLE_DATA pPerHandle; PPER_IO_DATA pPerIo; while( TRUE ) { // 在关联到此完成端口的所有套接字上等待I/O完成 BOOL bRet = ::GetQueuedCompletionStatus( hIocp, &dwTrans, (LPDWORD)&pPerHandle, (LPOVERLAPPED*)&pPerIo, WSA_INFINITE ); if( !bRet ) // 发生错误 { ::closesocket( pPerHandle->s ); ::GlobalFree( pPerHandle ); ::GlobalFree( pPerIo ); cout << "error" << endl; continue; } // 套接字被对方关闭 if( dwTrans == 0 && ( pPerIo->nOperationType == OP_READ || pPerIo->nOperationType&nb-sp;== OP_WRITE ) ) { ::closesocket( pPerHandle->s ); ::GlobalFree( pPerHandle ); ::GlobalFree( pPerIo ); cout << "client closed" << endl; continue; } switch ( pPerIo->nOperationType ) { case OP_READ: // 完成一个接收请求 { pPerIo->buf[dwTrans] = '/0'; printf( "%s/n", pPerIo->buf ); // 继续投递接受操作 WSABUF buf; buf.buf = pPerIo->buf; buf.len = BUFFER_SIZE; pPerIo->nOperationType = OP_READ; DWORD dwRecv = 0; DWORD dwFlags = 0; ::WSARecv( pPerHandle->s, &buf, 1, &dwRecv, &dwFlags, &pPerIo->ol, NULL ); } break; case OP_WRITE: case OP_ACCEPT: break; } } return 0; }