MFC学习多线程

#include <Windows.h>
#include <process.h>
#include <stdio.h>

HANDLE hMutex; //互斥对象
void ProcessTask(void * args)
{
    int a = 0;
    WaitForSingleObject(hMutex, INFINITE);
    while ( a < 100)
        printf("_beginthread %d\n", a++);
    ReleaseMutex(hMutex);
    //结束后会自动调用_endtrhead
}
unsigned int _stdcall ProcessTask2(void * args)
{
    int a = 0;
    WaitForSingleObject(hMutex, INFINITE);
    while ( a < 100)
        printf("_beginthreadex %d\n", a++);
    ReleaseMutex(hMutex); //如果不释放, 线程结束时, 系统也会释放
    //结束后会自动调用_endtrheadex
    return 0;
}
DWORD WINAPI ThreadProc(LPVOID lpParameter)
{
    int a = 0;
    WaitForSingleObject(hMutex, INFINITE);
    while ( a < 100)
        printf("CreateThread %d\n", a++);
    ReleaseMutex(hMutex);
    return 0;
}

int main()
{
    hMutex = CreateMutex(NULL, FALSE, "tickets");
    if(hMutex)
    {
        if(ERROR_ALREADY_EXISTS == GetLastError())
        {
            printf("one instance has exist\n");
            system("pause");
            return 0;
        }
    }
    _beginthread(ProcessTask, 0, 0);
    _beginthreadex(NULL, 0, ProcessTask2, NULL, 0, 0);
    Sleep(3000);
    DWORD threadId;
    HANDLE hThread3 = CreateThread(0, 0, ThreadProc, 0, 0, &threadId); //不建议使用, 在处理c库的时间类函数会内在泄漏大约70-80字节
    //创建匿名互斥对象
    //hMutex = CreateMutex(NULL, FALSE, NULL); //第二个参数参数初始化时当前线是否拥有互斥对象, 如果设置发TRUE, 可以用ReleaseMutex释放
    //创建一个命名互斥对象可以判断实例是否在运行
    
    CloseHandle(hThread3);
    system("pause");
    return 0;
}