为什么，天空是蓝色，为什么，大地是黑色，为什么，血是红色，为什么，这段代码无法返回....

[111222]

HANDLE hSemaphore;
int iThread=100;

UINT myfunction()
{

HANDLE hThread=NULL;
DWORD dwThreadID;
long PreviousCount;
hSemaphore=CreateSemaphore(NULL,iThread,iThread,NULL);
if(hSemaphore==NULL)
{
//("CreateSemaphore failed:%d",GetLastError());
}
for(int i=0;i<=iThread;i++)
{
hThread=CreateThread(NULL,0,ThreadPro,NULL,0,&dwThreadID);
if(hThread==NULL)
{
//("Create thread failed");
break;
}
CloseHandle(hThread);
WaitForSingleObject(hSemaphore,INFINITE);
}

while(1)
{
WaitForSingleObject(hSemaphore,INFINITE);
if(!ReleaseSemaphore(hSemaphore,1,&PreviousCount))
{
//("\nReleaseSemaphore failed:%d",GetLastError());
break;
}
if(PreviousCount==(iThread-1))
{
//("全部完毕");
break;
}
}
CloseHandle(hSemaphore);
return 0;
}




就是没法返回 0

[土豆]

HANDLE hSemaphore;
int iThread=100;

HANDLE hThread=NULL;
DWORD dwThreadID;
long PreviousCount;
hSemaphore=CreateSemaphore(NULL,iThread,iThread,NULL);
if(hSemaphore==NULL)
{
//("CreateSemaphore failed:%d",GetLastError());
}
for(int i=0;i<=iThread;i++)
{
hThread=CreateThread(NULL,0,myThread,NULL,0,&dwThreadID);
if(hThread==NULL)
{
//("Create thread failed");
break;
}
CloseHandle(hThread);
WaitForSingleObject(hSemaphore,INFINITE);
//i=100时，阻塞在这里，因为WaitForSingleObject(...)每次会将信号量计数减一
//所以上面的循环计数应该时0-99,而不是0-100.
printf("i=%d\n",i);
}


while(1)
{
WaitForSingleObject(hSemaphore,INFINITE);
//即使上面改正了，到这里后信号量计数已经是0，肯定阻塞在这里。
if(!ReleaseSemaphore(hSemaphore,1,&PreviousCount))
{
//("\nReleaseSemaphore failed:%d",GetLastError());
break;
}
if(PreviousCount==(iThread-1))
{
//("全部完毕");
break;
}
}
CloseHandle(hSemaphore);
return 0;
}

[土豆]

更正如小：

DWORD WINAPI myThread(LPVOID lpParam);

int main(int argc, char* argv[])
{
HANDLE hSemaphore;
int iThread=100;

HANDLE hThread=NULL;
DWORD dwThreadID;
SECURITY_ATTRIBUTES sa;
ZeroMemory(&sa,sizeof(SECURITY_ATTRIBUTES));
sa.nLength = sizeof(SECURITY_ATTRIBUTES);

hSemaphore=CreateSemaphore(NULL,0,iThread,"SEMA");//开始时计数为0，最大100
if(hSemaphore==NULL)
{
//("CreateSemaphore failed:%d",GetLastError());
}
for(int i=0;i<iThread;i++)
{
hThread=CreateThread(NULL,0,myThread,NULL,0,&dwThreadID);
if(hThread==NULL)
{
//("Create thread failed");
break;
}
CloseHandle(hThread);
//WaitForSingleObject(hSemaphore,INFINITE);
//i=100时，阻塞在这里，因为WaitForSingleObject(...)每次会将信号量计数减一
//所以上面的循环计数应该时0-99,而不是0-100.
}


for(i=0;i<iThread;i++)
{
WaitForSingleObject(hSemaphore,INFINITE);
}
CloseHandle(hSemaphore);
return 0;
}
DWORD WINAPI myThread(LPVOID lpParam)
{
//每个线程将计数加一。
HANDLE hSemaphore = OpenSemaphore(SEMAPHORE_ALL_ACCESS,FALSE,"SEMA");
ReleaseSemaphore(hSemaphore,1,NULL);
return TRUE;
}

[zb_china]

全错啦！天是灰的，地是黄的，血是黑的。

[neomeng]

while能用break退出吗？我好像也记不清楚了。

[111222]

多蒙堕落天使大仙指点乾坤！

[111222]

neomeng(大胖)　：

能地，不信你试试！