IOCP的程序
C代碼 ? #include?<winsock2.h>?? #include?<mswsock.h>?? #include?<windows.h>?? #include?<stdio.h>?? #include?<stdlib.h>?? #include?<assert.h>?? #include?"vld.h"?? ?? #pragma?message("automatic?link?to?ws2_32.lib?and?mswsock.lib")?? #pragma?comment(lib,?"ws2_32.lib")?? #pragma?comment(lib,?"mswsock.lib")?? ?? ?? ?? ?? #define?RETURN_SUCESS?(0)?? #define?RETURN_FAILED?(-1)?? ?? #define?PORT?5150//端口?? #define?IOCP_THREAD_MAX?16//最大的線程數?? #define?DATA_BUFSIZE?8192?? ?? ?? ?? //區別是何種完成事件?? enum?IO_EVENT?? {?? ????IO_EVENT_ACCEPT,?? ????IO_EVENT_WSARECV,?? ????IO_EVENT_WSARECVFROM,?? ????//不支持異步發送?? ????//IO_EVENT_WSASEND,?? ????//IO_EVENT_WSASENDTO?? };?? ?? ?? ?? ?? typedef?struct?overlapped_wrapper?? {?? ????//OVERLAPPED要放在第一個?? ????OVERLAPPED?overlapped;?? ????int?io_type;//指示是何種IO操作?? }overlapped_wrapper;?? ?? ?? ?? typedef?struct?acceptex_block?? {?? ????//OVERLAPPED要放在第一個?? ????OVERLAPPED?overlapped;?? ????int?io_type;//指示是何種IO操作?? ?? ????char?buffer[DATA_BUFSIZE];?? ????SOCKET?listen_socket;?? ????SOCKET?accept_socket;?? }acceptex_block;?? ?? ?? ?? typedef?struct?recv_block?? {?? ????//OVERLAPPED要放在第一個?? ????OVERLAPPED?overlapped;?? ????int?io_type;//指示是何種IO操作?? ?? ????char?buffer[DATA_BUFSIZE];?? ????SOCKET?socket;?? ????WSABUF?wsa_recv_buf;?? ????DWORD?bytes_recveived;?? }recv_block;?? ?? ?? ?? typedef?struct?recvfrom_block?? {?? ????//OVERLAPPED要放在第一個?? ????OVERLAPPED?overlapped;?? ????int?io_type;//指示是何種IO操作?? ?? ????char?buffer[DATA_BUFSIZE];?? ????SOCKET?socket;?? ????WSABUF?wsa_recv_buf;?? ????DWORD?bytes_recveived;?? ?? ????//UDP包的源地址?? ????struct?sockaddr_in?from_address;?? ????int?from_address_len;?? }recvfrom_block;?? ?? ?? ?? ?? ?? ?? int?get_cpu_number();?? ?? int?async_AcceptEx(acceptex_block*?block);?? int?async_WSARecv(recv_block*?block);?? int?async_WSARecvFrom(recvfrom_block*?block);?? ?? void?on_acceptex(acceptex_block*?block);?? void?on_recv(recv_block*?block);?? void?on_recvfrom(recvfrom_block*?block);?? void?on_tcp_listen_close(acceptex_block*?block);?? void?on_tcp_close(recv_block*?block);?? void?on_udp_close(recvfrom_block*?block);?? ?? int?init(void);?? void?uninit(void);?? DWORD?WINAPI?worker_thread(LPVOID?CompletionPortID);?? void?exit_error();?? ?? ?? ?? ?? ?? //完成端口的句柄?? HANDLE?g_completion_port?=?INVALID_HANDLE_VALUE;?? //工作線程句柄?? HANDLE?g_threads[IOCP_THREAD_MAX];?? //工作線程數量?? int?g_threads_number?=?0;?? ?? ?? int?main(void)?? {?? ????/************************************************************************/?? ????/*TCP的例子*/?? ????/************************************************************************/?? ????SOCKADDR_IN?internet_address;?? ????SOCKET?listen_socket;?? ????acceptex_block*?block;?? ?? ????if(RETURN_FAILED?==?init())?? ????????exit_error();?? ?? ????if?((listen_socket?=?socket(AF_INET,?SOCK_STREAM,?IPPROTO_TCP))?==?INVALID_SOCKET)?? ????????exit_error();?? ?? ????internet_address.sin_family?=?AF_INET;?? ????internet_address.sin_addr.s_addr?=?htonl(INADDR_ANY);?? ????internet_address.sin_port?=?htons(PORT);?? ?? ????if?(bind(listen_socket,?(PSOCKADDR)?&internet_address,?sizeof(internet_address))?==?SOCKET_ERROR)?? ????????exit_error();?? ?? ????if?(listen(listen_socket,?SOMAXCONN)?==?SOCKET_ERROR)?? ????????exit_error();?? ?? ????printf("listening?socket?%d\n",?PORT);?? ?? ????//把監聽的SOCKET和完成端口綁定?? ????if(NULL?==?CreateIoCompletionPort((HANDLE)listen_socket,?g_completion_port,?(u_long)listen_socket,?0))?? ????????exit_error();?? ?? ????block?=?(acceptex_block*)malloc(sizeof(acceptex_block));?? ????block->listen_socket?=?listen_socket;?? ????async_AcceptEx(block);?? ????getchar();?? ????closesocket(listen_socket);?? ????getchar();?? ????uninit();?? ????return?0;?? ?? ?? ?? ????/************************************************************************/?? ????/*UDP的例子*/?? ????/************************************************************************/?? ????//SOCKADDR_IN?internet_address;?? ????//SOCKET?sock;?? ????//recvfrom_block*?block?=?(recvfrom_block*)malloc(sizeof(recvfrom_block));?? ?? ????//if(RETURN_FAILED?==?init())?? ????//??exit_error();?? ?? ????//if?((sock?=?socket(AF_INET,?SOCK_DGRAM,?IPPROTO_UDP))?==?INVALID_SOCKET)?? ????//??exit_error();?? ?? ????//internet_address.sin_family?=?AF_INET;?? ????//internet_address.sin_addr.s_addr?=?htonl(INADDR_ANY);?? ????//internet_address.sin_port?=?htons(PORT);?? ?? ????//if?(bind(sock,?(PSOCKADDR)?&internet_address,?sizeof(internet_address))?==?SOCKET_ERROR)?? ????//??exit_error();?? ?? ????//if(NULL?==?CreateIoCompletionPort((HANDLE)sock,?g_completion_port,?(u_long)sock,?0))?? ????//??exit_error();?? ?? ????//block->socket?=?sock;?? ????//async_WSARecvFrom(block);?? ?? ?? ????//getchar();?? ????//closesocket(sock);?? ????//getchar();?? ????//uninit();?? ????//return?0;?? }?? ?? ?? ?? ?? int?init(void)?? {?? ????WSADATA?wsa_data;?? ????int?i;?? #if?defined?_DEBUG?||?defined?DEBUG?? ????//調試時用一個線程方便?? ????int?threads?=?1;?? #else?? ????int?threads?=?get_cpu_number();?? #endif?? ?? ?? ????if?(WSAStartup(0x0202,?&wsa_data)?!=?0)?? ????????return?RETURN_FAILED;?? ?? ????//建立完成端口?? ????if?((g_completion_port?=?CreateIoCompletionPort(INVALID_HANDLE_VALUE,?NULL,?0,?0))?==?NULL)?? ????????return?RETURN_FAILED;?? ?? ????if(threads?>?IOCP_THREAD_MAX)?? ????????threads?=?IOCP_THREAD_MAX;?? ????for(i?=?0;?i?<?threads;?i++)?? ????{?? ????????//創建工作線程?? ????????g_threads[g_threads_number++]?=?CreateThread(NULL,?0,?worker_thread,?NULL,?0,?0);?? ????}?? ????return?RETURN_SUCESS;?? }?? ?? ?? ?? void?uninit(void)?? {?? ????//自定義的退出協議,三個參數全為0時退出?? ????PostQueuedCompletionStatus(g_completion_port,?0,?0,?NULL);?? ?? ????WaitForMultipleObjects(g_threads_number,?g_threads,?TRUE,?INFINITE);?? ?? ????CloseHandle(g_completion_port);?? ?? ????WSACleanup();?? }?? ?? ?? int?get_cpu_number()?? {?? ????SYSTEM_INFO?system_info;?? ????GetSystemInfo(&system_info);?? ????return?system_info.dwNumberOfProcessors;?? }?? ?? ?? void?exit_error()?? {?? ????int?error?=?GetLastError();?? ????if?(error?==?0)?? ????{?? ????????exit(RETURN_SUCESS);?? ????}?? ????else?? ????{?? ????????fprintf(stderr,?"error:%d\n",?error);?? ????????exit(RETURN_FAILED);?? ????}?? }?? ?? ?? ?? /*? 投遞一次AcceptEx請求? 返回TRUE，成功? 返回FALSE，失敗，WSAGetLastError()獲取進一步信息? */?? int?async_AcceptEx(acceptex_block*?block)?? {?? ????DWORD?address_length;?? ????DWORD?bytes_received;?? ?? ????//準備投遞一個異步接受請求?? ????SOCKET?accept_socket?=?socket(AF_INET,?SOCK_STREAM,?IPPROTO_TCP);?? ????if(accept_socket?==?INVALID_SOCKET)?? ????????return?RETURN_FAILED;?? ?? ????block->io_type?=?IO_EVENT_ACCEPT;?? ????block->accept_socket?=?accept_socket;?? ????memset(&block->overlapped,?0,??? ????????sizeof(block->overlapped));?? ?? ?? ????address_length?=?sizeof(struct?sockaddr_in)?+?16;?? ????if(!AcceptEx(?? ????????block->listen_socket,??? ????????accept_socket,?? ????????block->buffer,//這個參數會傳遞給完成端口?? ????????0,//DATA_BUFSIZE?-?i?*?2,???????//傳0進來，接受的連接的時候不接受數據?? ????????address_length,?address_length,?? ????????&bytes_received,??? ????????&block->overlapped))?? ????{?? ????????if(WSAGetLastError()?!=?ERROR_IO_PENDING)?? ????????????goto?fail;?? ????}?? ????return?RETURN_SUCESS;?? ?? fail:?? ????closesocket(accept_socket);?? ????return?RETURN_FAILED;?? }?? ?? ?? ?? ?? ?? ?? ?? ?? /*? 投遞一次WSARecv請求? 返回TRUE，表示接受請求投遞成功? 返回FALSE，表示連接已經斷開，WSAGetLastError()獲取進一步信息? */?? int?async_WSARecv(recv_block*?block)?? {?? ????int?ret;?? ????DWORD?recv_bytes,?flags?=?0;?? ?? ????block->io_type?=?IO_EVENT_WSARECV;?? ????block->bytes_recveived?=?0;?? ????block->wsa_recv_buf.len?=?DATA_BUFSIZE;?? ????block->wsa_recv_buf.buf?=?block->buffer;?? ????memset(&(block->overlapped),?0,?sizeof(block->overlapped));?? ?? ?? ????//投遞一次接受請求?? ????ret?=?WSARecv(block->socket,?&block->wsa_recv_buf,?1,?&recv_bytes,?&flags,?? ????????&(block->overlapped),?NULL);?? ?? ????if(ret?==?-1?&&?WSAGetLastError()?!=?ERROR_IO_PENDING)?? ????{?? ????????printf("WSARecv()?error?returns?%d\n",?ret);?? ????????on_tcp_close(block);?? ????????return?RETURN_FAILED;?? ????}?? ????else?if((ret?==?0)?||?(ret?==?-1?&&?WSAGetLastError()?==?ERROR_IO_PENDING))?? ????{?? ????????//waiting...?for?next?turn?? ????}?? ????else?? ????{?? ????????//如果直接收到了數據?? ????????block->bytes_recveived?=?ret;?? ????????on_recv(block);?? ????????//遞歸?? ????????return?async_WSARecv(block);?? ????}?? ?? ????return?RETURN_SUCESS;?? }?? ?? ?? ?? ?? ?? /*? 投遞一次WSARecvFrom請求? 返回TRUE，表示接受請求投遞成功? 返回FALSE，表示接受請求投遞失敗，WSAGetLastError()獲取進一步信息? */?? int?async_WSARecvFrom(recvfrom_block*?block)?? {?? ????int?ret;?? ????DWORD?recv_bytes?=?0,?flags?=?0;?? ?? ????block->io_type?=?IO_EVENT_WSARECVFROM;?? ????block->bytes_recveived?=?0;?? ????block->wsa_recv_buf.len?=?DATA_BUFSIZE;?? ????block->wsa_recv_buf.buf?=?block->buffer;?? ????memset(&block->from_address,?0,?sizeof(block->from_address));?? ????block->from_address_len?=?sizeof(block->from_address);?? ????memset(&(block->overlapped),?0,?sizeof(block->overlapped));?? ?? ?? ????//投遞一次接受請求?? ????ret?=?WSARecvFrom(block->socket,?&block->wsa_recv_buf,?1,?&recv_bytes,?&flags,?? ????????(struct?sockaddr*)&block->from_address,?&block->from_address_len,?? ????????&(block->overlapped),?NULL);?? ?? ????if(ret?==?-1?&&?WSAGetLastError()?!=?ERROR_IO_PENDING)?? ????{?? ????????printf("WSARecvFrom()?error?returns?%d?%d\n",?ret,?WSAGetLastError());?? ????????on_udp_close(block);?? ????????return?RETURN_FAILED;?? ????}?? ????else?if((ret?==?0)?||?(ret?==?-1?&&?WSAGetLastError()?==?ERROR_IO_PENDING))?? ????{?? ????????//waiting...?for?next?turn?? ????}?? ????else?? ????{?? ????????//如果直接收到了數據?? ????????block->bytes_recveived?=?ret;?? ????????on_recvfrom(block);?? ????????//遞歸?? ????????return?async_WSARecvFrom(block);?? ????}?? ?? ????return?RETURN_SUCESS;?? }?? ?? ?? void?on_acceptex(acceptex_block*?block)?? {?? ????DWORD?i;?? ????struct?sockaddr?*p_local_addr;?? ????int?local_addr_len?=?sizeof(struct?sockaddr_in);?? ????struct?sockaddr?*p_remote_addr;?? ????int?remote_addr_len?=?sizeof(struct?sockaddr_in);?? ????struct?sockaddr_in?*p_v4_addr;?? ?? ????recv_block*?r_block;?? ?? ?? ????printf("on_acceptex?%d\n",?block->accept_socket);?? ?? ????i?=?sizeof(struct?sockaddr_in)?+?16;?? ????GetAcceptExSockaddrs(?? ????????block->buffer,?? ????????0,//DATA_BUFSIZE?-?i?*?2,?? ????????i,?i,?? ????????&p_local_addr,?? ????????&local_addr_len,?? ????????&p_remote_addr,?? ????????&remote_addr_len?? ????????);?? ?? ????p_v4_addr?=?(struct?sockaddr_in?*)p_local_addr;?? ????printf("\t本地地址%s:%d\n",??? ????????inet_ntoa(p_v4_addr->sin_addr),?ntohs(p_v4_addr->sin_port));?? ????p_v4_addr?=?(struct?sockaddr_in?*)p_remote_addr;?? ????printf("\t遠程地址%s:%d\n",??? ????????inet_ntoa(p_v4_addr->sin_addr),?ntohs(p_v4_addr->sin_port));?? ?? ?? ?? ????//準備投遞一次WSARecv請求?? ????r_block?=?(recv_block*)malloc(sizeof(recv_block));?? ????r_block->socket?=?block->accept_socket;?? ?? ????//綁定?? ????CreateIoCompletionPort((HANDLE)r_block->socket,??? ????????g_completion_port,?(u_long)r_block->socket,?0);?? ?? ????//投遞一次接受請求?? ????async_WSARecv(r_block);?? ?? ????//繼續投遞AcceptEx請求?? ????async_AcceptEx(block);?? }?? ?? void?on_recv(recv_block*?block)?? {?? ????printf("on_recv?%d,?收到%d?bytes數據\n",?block->socket,?block->bytes_recveived);?? ?? ????async_WSARecv(block);?? }?? ?? ?? void?on_recvfrom(recvfrom_block*?block)?? {?? ????printf("on_recvfrom?%d,?收到%d?bytes數據,?來自%s:%d\n",?? ????????block->socket,?? ????????block->bytes_recveived,?? ????????inet_ntoa(block->from_address.sin_addr),?? ????????ntohs(block->from_address.sin_port));?? ?? ????async_WSARecvFrom(block);?? }?? ?? ?? void?on_tcp_listen_close(acceptex_block*?block)?? {?? ????printf("on_tcp_listen_close?%d\n",?block->accept_socket);?? ????free(block);?? ????closesocket(block->accept_socket);?? }?? ?? ?? void?on_tcp_close(recv_block*?block)?? {?? ????printf("on_tcp_close?%d\n",?block->socket);?? ????free(block);?? ????closesocket(block->socket);?? }?? ?? ?? void?on_udp_close(recvfrom_block*?block)?? {?? ????printf("on_udp_close?%d\n",?block->socket);?? ????free(block);?? ????closesocket(block->socket);?? }?? ?? ?? ?? DWORD?WINAPI?worker_thread(LPVOID?nothing)?? {?? ????DWORD?bytes;?? ????overlapped_wrapper*?over_type;?? ????BOOL?close_socket?=?FALSE;?? ????BOOL?ret;?? ?? ????UNREFERENCED_PARAMETER(nothing);?? ?? ????for(;;)?? ????{?? ????????SOCKET?socket;?? ????????//注意第三個參數，他是CreateIoCompletionPort時傳入的，直接傳入的是一個SOCKET?? ????????//注意第四個參數，他可能是一個recv_block或acceptex_block結構的指針?? ????????//因為OVERLAPPED是PER_IO_OPERATION_DATA的第一個成員，所以可以安全的進行轉換?? ????????ret?=?GetQueuedCompletionStatus(g_completion_port,?&bytes,?? ????????????(LPDWORD)&socket,?(LPOVERLAPPED?*)?&over_type,?INFINITE);?? ?? ?? ????????if(ret?==?ERROR_SUCCESS)?? ????????{?? ????????????DWORD?last_error?=?GetLastError();?? ?? ????????????if(ERROR_INVALID_HANDLE?==?last_error)?? ????????????{?? ????????????????printf("完成端口被關閉,退出\n");?? ????????????????return?0;?? ????????????}?? ????????????else?if(ERROR_NETNAME_DELETED?==?last_error?? ????????????????||?ERROR_OPERATION_ABORTED?==?last_error)?? ????????????{?? ????????????????printf("socket被關閉?或者?操作被取消\n");?? ????????????????close_socket?=?TRUE;?? ????????????}?? ????????????else?? ????????????{?? ????????????????printf("GetLastError?%d\n",?last_error);?? ????????????????continue;?? ????????????}?? ????????}?? ????????//自定義的退出協議,三個參數全為0時退出(見uninit中的PostQueuedCompletionStatus)?? ????????else?if(bytes?==?0?&&?socket?==?0?&&?over_type?==?NULL)?? ????????{?? ????????????return?0;?? ????????}?? ?? ????????assert(over_type);?? ?? ????????switch(over_type->io_type)?? ????????{?? ????????case?IO_EVENT_ACCEPT:?? ????????????{?? ????????????????acceptex_block*?a_block?=?(acceptex_block*)over_type;?? ?? ????????????????if(close_socket)?? ????????????????{?? ????????????????????on_tcp_listen_close(a_block);?? ????????????????}?? ????????????????else?? ????????????????{?? ????????????????????on_acceptex(a_block);?? ????????????????}?? ????????????}?? ????????????break;?? ?? ????????case?IO_EVENT_WSARECV:?? ????????????{?? ????????????????recv_block*?r_block?=?(recv_block*)over_type;?? ????????????????//連接斷開?? ????????????????if?(close_socket?||?bytes?==?0?||?bytes?==?-1)?? ????????????????{?? ????????????????????//測試一下，確定對方肯定關閉連接了?? ????????????????????char?test_close;?? ????????????????????int?r?=?recv(r_block->socket,?&test_close,?sizeof(test_close),?MSG_PEEK);?? ????????????????????if(r?==?0?||?r?==?-1)?? ????????????????????{?? ????????????????????????on_tcp_close(r_block);?? ????????????????????}?? ????????????????}?? ????????????????//收到了bytes字節的數據?? ????????????????else?? ????????????????{?? ????????????????????//處理數據?? ????????????????????r_block->bytes_recveived?=?bytes;?? ????????????????????on_recv(r_block);?? ????????????????}?? ????????????}?? ????????????break;?? ?? ?? ????????case?IO_EVENT_WSARECVFROM:?? ????????????{?? ????????????????recvfrom_block*?rf_block?=?(recvfrom_block*)over_type;?? ?? ????????????????if(close_socket?||?bytes?==?-1?||?bytes?==?0)?? ????????????????{?? ????????????????????on_udp_close(rf_block);?? ????????????????}?? ????????????????else?? ????????????????{?? ????????????????????//處理數據?? ????????????????????rf_block->bytes_recveived?=?bytes;?? ????????????????????on_recvfrom(rf_block);?? ????????????????}?? ????????????}?? ????????????break;?? ?? ?? ????????default:?? ????????????break;?? ????????}?? ????}?? ????return?0;?? }?
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