Event多线程同步演示

来源：互联网发布：php登录次数编辑：程序博客网时间：2024/05/19 11:49
通过这个简单的示例进行可以很快学习了解Event的用法.
#include "stdafx.h"#include <windows.h>#include <stdio.h>#include "iostream"#include "process.h"#define THREADCOUNT 10 HANDLE ghWriteEvent; HANDLE ghMutex;HANDLE ghThreads[THREADCOUNT];DWORD WINAPI ThreadProc(LPVOID);void CreateEventsAndThreads(void) {    int i;     DWORD dwThreadID;     ghMutex = CreateMutex(NULL, FALSE, NULL);    ghWriteEvent = CreateEvent( NULL, FALSE,TRUE, TEXT("WriteEvent"));     if (ghWriteEvent == NULL)     {         printf("CreateEvent failed (%d)\n", GetLastError());        return;    }    for(i = 0; i < THREADCOUNT; i++)     {        ghThreads[i] = CreateThread(NULL, 0, ThreadProc, NULL, 0, &dwThreadID);         if (ghThreads[i] == NULL) {            printf("CreateThread failed (%d)\n", GetLastError());            return;        }    }}void WriteToBuffer(VOID) {    printf("Main thread writing to the shared buffer...\n");    if (! SetEvent(ghWriteEvent) ) {        printf("SetEvent failed (%d)\n", GetLastError());        return;    }}void CloseEvents() {    CloseHandle(ghWriteEvent);}void main(){    DWORD dwWaitResult;    CreateEventsAndThreads();    //WriteToBuffer();    printf("Main thread waiting for threads to exit...\n");    dwWaitResult = WaitForMultipleObjects(THREADCOUNT, ghThreads, TRUE, INFINITE);    switch (dwWaitResult)     {    case WAIT_OBJECT_0:         printf("All threads ended, cleaning up for application exit...\n");        break;    default:         printf("WaitForMultipleObjects failed (%d)\n", GetLastError());        return;    }     CloseEvents();}DWORD WINAPI ThreadProc(LPVOID lpParam) {    DWORD dwWaitResult;    printf("Thread %d waiting for write event...\n", GetCurrentThreadId());    Sleep(100);    dwWaitResult = WaitForSingleObject(ghWriteEvent,  INFINITE);    Sleep(100);    printf("Thread %d waiting for write event2...\n", GetCurrentThreadId());    dwWaitResult = WaitForSingleObject(ghWriteEvent, INFINITE);    switch (dwWaitResult)     {    case WAIT_OBJECT_0:         printf("Thread %d reading from buffer\n",             GetCurrentThreadId());        break;     default:         printf("Wait error (%d)\n", GetLastError());         return 0;     }    Sleep(100);    printf("Thread %d exiting\n", GetCurrentThreadId());    return 1;}#include "stdafx.h"#include <windows.h>#include <stdio.h>#include "iostream"#include "process.h"#define THREADCOUNT 10 HANDLE ghWriteEvent; HANDLE ghMutex;HANDLE ghThreads[THREADCOUNT];DWORD WINAPI ThreadProc(LPVOID);void CreateEventsAndThreads(void) {    int i;     DWORD dwThreadID;     ghMutex = CreateMutex(NULL, FALSE, NULL);    ghWriteEvent = CreateEvent( NULL, FALSE,TRUE, TEXT("WriteEvent"));     if (ghWriteEvent == NULL)     {         printf("CreateEvent failed (%d)\n", GetLastError());        return;    }    for(i = 0; i < THREADCOUNT; i++)     {        ghThreads[i] = CreateThread(NULL, 0, ThreadProc, NULL, 0, &dwThreadID);         if (ghThreads[i] == NULL) {            printf("CreateThread failed (%d)\n", GetLastError());            return;        }    }}void WriteToBuffer(VOID) {    printf("Main thread writing to the shared buffer...\n");    if (! SetEvent(ghWriteEvent) ) {        printf("SetEvent failed (%d)\n", GetLastError());        return;    }}void CloseEvents() {    CloseHandle(ghWriteEvent);}void main(){    DWORD dwWaitResult;    CreateEventsAndThreads();    //WriteToBuffer();    printf("Main thread waiting for threads to exit...\n");    dwWaitResult = WaitForMultipleObjects(THREADCOUNT, ghThreads, TRUE, INFINITE);    switch (dwWaitResult)     {    case WAIT_OBJECT_0:         printf("All threads ended, cleaning up for application exit...\n");        break;    default:         printf("WaitForMultipleObjects failed (%d)\n", GetLastError());        return;    }     CloseEvents();}DWORD WINAPI ThreadProc(LPVOID lpParam) {    DWORD dwWaitResult;    printf("Thread %d waiting for write event...\n", GetCurrentThreadId());    Sleep(100);    dwWaitResult = WaitForSingleObject(ghWriteEvent,  INFINITE);    Sleep(100);    printf("Thread %d waiting for write event2...\n", GetCurrentThreadId());    dwWaitResult = WaitForSingleObject(ghWriteEvent, INFINITE);    switch (dwWaitResult)     {    case WAIT_OBJECT_0:         printf("Thread %d reading from buffer\n",             GetCurrentThreadId());        break;     default:         printf("Wait error (%d)\n", GetLastError());         return 0;     }    Sleep(100);    printf("Thread %d exiting\n", GetCurrentThreadId());    return 1;}
阅读全文
0 0