我双核运行下面程序，有时候这样的结果
Thread1 is running
Thread1 is running
Thread2 is running
其中“Thread1 is running”出现2次，是怎么回事？？但这种情况少见，运行多次偶尔会有这样的情况！！

#include <windows.h>
#include <iostream.h>

DWORD WINAPI Fun1Proc(LPVOID lpParameter);

DWORD WINAPI Fun2Proc(LPVOID lpParameter);


HANDLE hMutex;
void main()
{
    HANDLE hThread1;
    HANDLE hThread2;
    hThread1=CreateThread(NULL,0,Fun1Proc,NULL,0,NULL);
    hThread2=CreateThread(NULL,0,Fun2Proc,NULL,0,NULL);
    CloseHandle(hThread1);
    CloseHandle(hThread2);
   
   
    hMutex=CreateMutex(NULL,TRUE,"tickets");
    if(hMutex)
    {
        if(ERROR_ALREADY_EXISTS==GetLastError())
        {
            cout<<"only instance can run!"<<endl;
            return;
        }
    }
    WaitForSingleObject(hMutex,INFINITE);
    ReleaseMutex(hMutex);
    ReleaseMutex(hMutex);
    Sleep(4000);

}

DWORD WINAPI Fun1Proc(
  LPVOID lpParameter   // thread data
)
{
   

    WaitForSingleObject(hMutex,INFINITE);
    cout<<"thread1 is running"<<endl;
    return 0;
}

DWORD WINAPI Fun2Proc(
  LPVOID lpParameter   // thread data
)
{
   
   
    WaitForSingleObject(hMutex,INFINITE);
    cout<<"thread2 is running"<<endl;
    return 0;
}

换成printf以后测试了一下，还是出现过一次，不过好像比以前几率小了很多
我用的是6.0
说说看到底是什么原因

你用的什么版本，我的没有那选项
我若单核运行就不会有那结果

把Debug Single Threaded改成Debug Multithreaded，仍然出现那种情况

等答案