跨平台的EVENT事件 windows linux
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#ifndef _HIK_EVENT_H_ #define _HIK_EVENT_H_ #ifdef _MSC_VER #include <Windows.h> #define hik_event_handle HANDLE #else #include <pthread.h> typedef struct { bool state; bool manual_reset; pthread_mutex_t mutex; pthread_cond_t cond; }event_t; #define event_handle event_t* #endif //返回值:NULL 出错 event_handle event_create(bool manual_reset, bool init_state); //返回值:0 等到事件,-1出错 int event_wait(event_handle hevent); //返回值:0 等到事件,1 超时,-1出错 int event_timedwait(event_handle hevent, long milliseconds); //返回值:0 成功,-1出错 int event_set(event_handle hevent); //返回值:0 成功,-1出错 int event_reset(event_handle hevent); //返回值:无 void event_destroy(event_handle hevent); #endif //////////// <PRE class=cpp name="code">#include "event.h" #ifdef __linux #include <sys/time.h> #include <errno.h> #endif #include <iostream> event_handle event_create(bool manual_reset, bool init_state) { #ifdef _MSC_VER HANDLE hevent = CreateEvent(NULL, manual_reset, init_state, NULL); #else event_handle hevent = new(std::nothrow) event_t; if (hevent == NULL) { return NULL; } hevent->state = init_state; hevent->manual_reset = manual_reset; if (pthread_mutex_init(&hevent->mutex, NULL)) { delete hevent; return NULL; } if (pthread_cond_init(&hevent->cond, NULL)) { pthread_mutex_destroy(&hevent->mutex); delete hevent; return NULL; } #endif return hevent; } int event_wait(event_handle hevent) { #ifdef _MSC_VER DWORD ret = WaitForSingleObject(hevent, INFINITE); if (ret == WAIT_OBJECT_0) { return 0; } return -1; #else if (pthread_mutex_lock(&hevent->mutex)) { return -1; } while (!hevent->state) { if (pthread_cond_wait(&hevent->cond, &hevent->mutex)) { pthread_mutex_unlock(&hevent->mutex); return -1; } } if (!hevent->manual_reset) { hevent->state = false; } if (pthread_mutex_unlock(&hevent->mutex)) { return -1; } return 0; #endif } int event_timedwait(event_handle hevent, long milliseconds) { #ifdef _MSC_VER DWORD ret = WaitForSingleObject(hevent, milliseconds); if (ret == WAIT_OBJECT_0) { return 0; } if (ret == WAIT_TIMEOUT) { return 1; } return -1; #else int rc = 0; struct timespec abstime; struct timeval tv; gettimeofday(&tv, NULL); abstime.tv_sec = tv.tv_sec + milliseconds / 1000; abstime.tv_nsec = tv.tv_usec*1000 + (milliseconds % 1000)*1000000; if (abstime.tv_nsec >= 1000000000) { abstime.tv_nsec -= 1000000000; abstime.tv_sec++; } if (pthread_mutex_lock(&hevent->mutex) != 0) { return -1; } while (!hevent->state) { if (rc = pthread_cond_timedwait(&hevent->cond, &hevent->mutex, &abstime)) { if (rc == ETIMEDOUT) break; pthread_mutex_unlock(&hevent->mutex); return -1; } } if (rc == 0 && !hevent->manual_reset) { hevent->state = false; } if (pthread_mutex_unlock(&hevent->mutex) != 0) { return -1; } if (rc == ETIMEDOUT) { //timeout return 1 return 1; } //wait event success return 0 return 0; #endif } int event_set(event_handle hevent) { #ifdef _MSC_VER return !SetEvent(hevent); #else if (pthread_mutex_lock(&hevent->mutex) != 0) { return -1; } hevent->state = true; if (hevent->manual_reset) { if(pthread_cond_broadcast(&hevent->cond)) { return -1; } } else { if(pthread_cond_signal(&hevent->cond)) { return -1; } } if (pthread_mutex_unlock(&hevent->mutex) != 0) { return -1; } return 0; #endif } int event_reset(event_handle hevent) { #ifdef _MSC_VER //ResetEvent 返回非零表示成功 if (ResetEvent(hevent)) { return 0; } return -1; #else if (pthread_mutex_lock(&hevent->mutex) != 0) { return -1; } hevent->state = false; if (pthread_mutex_unlock(&hevent->mutex) != 0) { return -1; } return 0; #endif } void event_destroy(event_handle hevent) { #ifdef _MSC_VER CloseHandle(hevent); #else pthread_cond_destroy(&hevent->cond); pthread_mutex_destroy(&hevent->mutex); delete hevent; #endif }
原文:http://www.cnblogs.com/lidabo/p/7182039.html
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