C++多线程例子

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C++多线程例子

2008-08-21 15:11

//这是2个线程模拟卖火车票的小程序
#include <windows.h>
#include <iostream.h>

DWORD WINAPI Fun1Proc(LPVOID lpParameter);//thread data
DWORD WINAPI Fun2Proc(LPVOID lpParameter);//thread data

int index=0;
int tickets=10;
HANDLE hMutex;
void main()
{
    HANDLE hThread1;
    HANDLE hThread2;
    //创建线程

    hThread1=CreateThread(NULL,0,Fun1Proc,NULL,0,NULL);
    hThread2=CreateThread(NULL,0,Fun2Proc,NULL,0,NULL);
    CloseHandle(hThread1);
    CloseHandle(hThread2);

    //创建互斥对象
    hMutex=CreateMutex(NULL,TRUE,"tickets");
    if (hMutex)
    {
        if (ERROR_ALREADY_EXISTS==GetLastError())
        {
            cout<<"only one instance can run!"<<endl;
            return;
        }
    }
    WaitForSingleObject(hMutex,INFINITE);
    ReleaseMutex(hMutex);
    ReleaseMutex(hMutex);

    Sleep(4000);
}
//线程1的入口函数
DWORD WINAPI Fun1Proc(LPVOID lpParameter)//thread data
{
    while (true)
    {
        ReleaseMutex(hMutex);
        WaitForSingleObject(hMutex,INFINITE);
        if (tickets>0)
        {
            Sleep(1);
            cout<<"thread1 sell ticket :"<<tickets--<<endl;
        }
        else
            break;
        ReleaseMutex(hMutex);
    }

    return 0;
}
//线程2的入口函数
DWORD WINAPI Fun2Proc(LPVOID lpParameter)//thread data
{
    while (true)
    {
        ReleaseMutex(hMutex);
        WaitForSingleObject(hMutex,INFINITE);
        if (tickets>0)
        {
            Sleep(1);
            cout<<"thread2 sell ticket :"<<tickets--<<endl;
        }
        else
            break;
        ReleaseMutex(hMutex);
    }

    return 0;
}