MFC 线程内延时问题

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我是靠谱客的博主安详苗条，最近开发中收集的这篇文章主要介绍MFC 线程内延时问题，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

单击按钮后，创建线程



void CRandom_CreatDlg::OnButtonStart() 

{

	// TODO: Add your control notification handler code here

	if (!image.isStart)

	{	

	image.isStart=true;

	pThread=AfxBeginThread(ThreadDisplay,&image,THREAD_PRIORITY_NORMAL);

	}

	else

		image.isStart=false;

}

线程函数



UINT ThreadDisplay(LPVOID param)

{

	ImageInfo *pImage=(ImageInfo*)param;

	if (pImage->m_ImagePathAry.GetSize()==0)

	{

		return FALSE;

	}

	while(pImage->isStart)

	{   

		srand(time(NULL));

        CDC *pDC=pImage->pWnd->GetDC();

		Graphics graph(pDC->GetSafeHdc());

		int m_rand=rand()%pImage->m_ImagePathAry.GetSize();

		WCHAR* path=pImage->m_ImagePathAry[m_rand].AllocSysString();

		Image image(path);

		graph.DrawImage(&image,pImage->rc.left,pImage->rc.top,pImage->rc.right-pImage->rc.left,pImage->rc.bottom-pImage->rc.top);

		DelayTime(50);

	}

	return TRUE;

}

延时函数



void DelayTime(DWORD dwMilliseconds)

{

	LARGE_INTEGER littmp;

	LONGLONG lTimeBegin;

	LONGLONG lTimeEnd;

	double dMinus;

	double dFreq;

	double dTim;

	QueryPerformanceFrequency(&littmp);

	dFreq=(double)littmp.QuadPart;

	QueryPerformanceCounter(&littmp);

	lTimeBegin=littmp.QuadPart;

	do 

	{

		QueryPerformanceCounter(&littmp);

		lTimeEnd=littmp.QuadPart;

		dMinus=(double)(lTimeEnd-lTimeBegin);

		dTim=dMinus/dFreq;

	} while (dTim<dwMilliseconds*0.001);

}