在线急问一个线程同步问题

[chsilence]

请问各位，下面的程序怎么执行有问题，线程函数有时被执行，有时不被执行，为什么呀？快崩溃了！急！

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

HANDLE hEvent;
int i = 1;
char g_cArray[10];
DWORD threadProc2(LPVOID lparam)
{

WaitForSingleObject(hEvent,INFINITE);
printf("%d\n",i);

SetEvent(hEvent);
return 0;
}
DWORD threadProc1(LPVOID lparam)
{

WaitForSingleObject(hEvent,INFINITE);
i++;
printf("e%d\n",i);

SetEvent(hEvent);
return 0;
}

void main(void)
{

hEvent = CreateEvent(NULL,false,false,NULL);

HANDLE hThread1 = CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)&threadProc1,NULL,0,NULL);
HANDLE hThread2 = CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)&threadProc2,NULL,0,NULL);


SetEvent(hEvent);

printf("%d\n",i);

CloseHandle(hThread1);
CloseHandle(hThread2);
CloseHandle(hEvent);
}

[sdwalnut1]

WaitForSingleObject(hEvent,INFINITE)的原因;INFINITE表示一直等待。如果hEvent被加锁了，程序就会在这一步等待，直到被解锁。

[needways]

void main(void)
{

hEvent = CreateEvent(NULL,false,false,NULL);

HANDLE hThread1 = CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)&threadProc1,NULL,0,NULL);
HANDLE hThread2 = CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)&threadProc2,NULL,0,NULL);


SetEvent(hEvent);

Sleep(3000); // 等待一段时间，不要这么快就关闭句柄。

printf("%d\n",i);

CloseHandle(hThread1);
CloseHandle(hThread2);
CloseHandle(hEvent);
}

[sdwalnut1]

hEvent可能与别的程序相同，导致线程中waitforsingleobject后面的代码不被执行，而线成就被close了。可以给hevent给一个名称，并且在close之前，先sleep以下

[枫舞的季节]

我觉得你使用的event 是非手动reset模式的，当你的一个线程结束以后，会被系统自动reset
那么另外的一个线程就会等待，永远的等待。
把这个事件更改为 手动reset模式就可以了。hEvent = CreateEvent(NULL,true,false,NULL);


void main(void)
{

hEvent = CreateEvent(NULL,true,false,NULL);

HANDLE hThread1 = CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)&threadProc1,NULL,0,NULL);
HANDLE hThread2 = CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)&threadProc2,NULL,0,NULL);


SetEvent(hEvent);

printf("%d\n",i);

CloseHandle(hThread1);
CloseHandle(hThread2);
CloseHandle(hEvent);
}

[yst_killed]

void main(void)
{

hEvent = CreateEvent(NULL,false,false,NULL);

HANDLE hThread1 = CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)&threadProc1,NULL,0,NULL);
HANDLE hThread2 = CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)&threadProc2,NULL,0,NULL);


SetEvent(hEvent);
WaitForSingleObject( hThrds[slot] , INFINITE );
//你可以在这里加上这句当然参数可能部队用WaitForSingleObject比较合适
printf("%d\n",i);

CloseHandle(hThread1);
CloseHandle(hThread2);
CloseHandle(hEvent);
}