利用事件对象同步线程

 

#include <windows.h>
#include <stdio.h>

#define NUMTHREADS 3
#define BUFFER_SIZE 16
#define FOR_TIMES 5

HANDLE hEvent;
BYTE lpSharedBuffer[16] = {0};

void UseEvents(void);
DWORD WINAPI EventFunction(LPVOID lpParam);

int main(){
    UseEvents();
}

void UseEvents(void){
    HANDLE hThread;
    hEvent = CreateEvent(NULL,TRUE,FALSE,NULL);
    if(hEvent == NULL){
        printf("CreateEvent failed.(%d)\n",GetLastError());
        return;
    }
    hThread = CreateThread(NULL,0,EventFunction,NULL,0,NULL);
    if(hThread == NULL){
        printf("CreateThread failed.(%d)\n",GetLastError());
        return;
    }
    Sleep(2000);
    CopyMemory(lpSharedBuffer,"Event",strlen("Event"));
    SetEvent(hEvent);
}

DWORD WINAPI EventFunction(LPVOID lpParam){
    DWORD dwWaitResult;
    dwWaitResult = WaitForSingleObject(hEvent,INFINITE);
    if(dwWaitResult!=WAIT_OBJECT_0){
        printf("Wait error:%d\n",GetLastError());
        return 0;
    }
    printf("0%x",lpSharedBuffer);
    system("pause");
    if(!ResetEvent(hEvent)){
        printf("SetEvent failed(%d)\n",GetLastError());
        return 0;
    }
    return 1;
}