C++线程同步之事件（生产者与消费者问题）

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

HANDLE g_hSet = NULL;
HANDLE g_hClear = NULL;
HANDLE hThread[] = { NULL };
int g_Max = ;
int g_Number = ;

// 生产者线程
DWORD WINAPI ThreadProc1(LPVOID lpParameter)
{
    for (int i = ; i < g_Max; i++)
    {
        WaitForSingleObject(g_hSet, INFINITE);
        g_Number = ;
        DWORD id = GetCurrentThreadId();
        printf("生产者%d将数据%d放入缓冲区！\n", id, g_Number);
        SetEvent(g_hClear);
    }
    return ;
}

// 消费者线程
DWORD WINAPI ThreadProc2(LPVOID lpParameter)
{
    for (int i = ; i < g_Max; i++)
    {
        WaitForSingleObject(g_hClear, INFINITE);
        g_Number = ;
        DWORD id = GetCurrentThreadId();
        printf("---消费者%d将数据%d放入缓冲区！\n", id, g_Number);
        SetEvent(g_hSet);
    }
    return ;
}

int main()
{
    g_hSet = ::CreateEvent(NULL, FALSE, TRUE, NULL);
    g_hClear = ::CreateEvent(NULL, FALSE, FALSE, NULL);
    hThread[] = CreateThread(, , ThreadProc1, , , );
    hThread[] = CreateThread(, , ThreadProc2, , , );
    WaitForMultipleObjects(, hThread, TRUE, -);
    CloseHandle(hThread[]);
    CloseHandle(hThread[]);
    CloseHandle(g_hClear);
    CloseHandle(g_hSet);
    getchar();
    return ;
}

临界区与互斥体是不能解决线程同步问题的，只能解决互斥问题，但是事件既可以解决互斥问题，又可以解决线程同步问题。