sleep()是怎么实现的

[cl002]

要将线程进行微妙几级挂起，现在是这样干的：
QueryPerformanceCounter(&litmp);
QPart1 = litmp.QuadPart;

while(ulElapse < m_ulSamCycle)
{
EnterCriticalSection(&m_cs);
QueryPerformanceCounter(&litmp);
QPart2 = litmp.QuadPart;

dfMinus = (double)(QPart2 - QPart1);
dfTim = dfMinus/dfFreq;
dfTimMir = SECTOMIR(dfTim);
ulElapse += (long) dfTimMir;
LeaveCriticalSection(&m_cs);
}
实在是太费系统资源，cpu利用率经常是100％，有没有想sleep样的函数可以实现微秒级的挂起？或者可不可以重写sleep()函数？大家给点建议

[hell190109]

毫秒级

[zhangcrony]

Pay attention to this: you'd better set up a timer!

[DuMiYue]

//Thread Waiting Function
int WaitWithMessageLoop(DWORD dwMilliseconds)
{
CEvent event;
bool bContinue = TRUE;
int iReturnVal = STATUS_WAIT_0;
while(bContinue)
{
switch(iReturnVal = ::MsgWaitForMultipleObjects(1, &event.GetHandle(), FALSE, dwMilliseconds, QS_ALLEVENTS | QS_ALLINPUT))
{
case WAIT_OBJECT_0:
bContinue = FALSE;
//::ResetEvent(pHandles[0]);
break;

case (WAIT_OBJECT_0 + 1):
MSG msg;
while(::PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
{
::TranslateMessage(&msg);
::DispatchMessage(&msg);
if(msg.message == WM_QUIT)
{
bContinue = FALSE;
break;
}
}
break;

case WAIT_TIMEOUT:
bContinue = FALSE;
break;

default:
;
}
}

return iReturnVal;
}

[ZhangYang1981]

我也发现了同样的问题。