Windows核心编程--事件内核对象

事件的触发表示一个操作已经完成，有两种不同类型的事件对象，手动重置事件和自动重置事件。当一个手动重置事件被触发的时候，正在等待该事件的所有线程都将变成可调度的。当一个自动重置事件触发的时候，只有一个正在等待该事件的线程会变成可调度状态。下面是事件内核对象的简单应用。

//事件内核对象 

HANDLE g_hEvent;

UINT WINAPI WordCount(PVOID pvParam)

{
WaitForSingleObject(g_hEvent, INFINITE);
_tprintf(_T("WordCount\n"));
SetEvent(g_hEvent);
return 0;

}

UINT WINAPI SpellCheck(PVOID pvParam)

{
WaitForSingleObject(g_hEvent, INFINITE);
_tprintf(_T("SpellCheck\n"));
SetEvent(g_hEvent);
return 0;

}

UINT WINAPI GrammarCheck(PVOID pvParam)

{
WaitForSingleObject(g_hEvent, INFINITE);
_tprintf(_T("GrammarCheck\n"));
SetEvent(g_hEvent);
return 0;

}

//end

main函数如下：

int _tmain( int argc, TCHAR* argv[] )

{

        g_hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
HANDLE hThread[3];
UINT dwThreadID;
hThread[0] = (HANDLE)_beginthreadex(NULL, 0, WordCount, NULL, 0, &dwThreadID);
hThread[1] = (HANDLE)_beginthreadex(NULL, 0, SpellCheck, NULL, 0, &dwThreadID);
hThread[2] = (HANDLE)_beginthreadex(NULL, 0, GrammarCheck, NULL, 0, &dwThreadID);
Sleep(5000);
SetEvent(g_hEvent);
WaitForMultipleObjects(3, hThread, TRUE, INFINITE);
for (int i = 0; i < 3; i++)
{
CloseHandle(hThread[i]);
}
CloseHandle(g_hEvent);
return 0;

}