XSleep - An alternative to the Sleep() function

Environment: Windows 9x/NT, Visual C++ 6.0

If you use Sleep() in your code, you will soon realize that your application "appears" to block. This is because the Sleep() function does not process the message pump, and due to this your application gives the appearance of "hanging" for some time.

I've written an alternative function which keeps processing the message pump to ensure that all message are posted even while the Sleep is in progress.

You may not find it neccessary to use the XSleep() function all the time. For instance, in a console based application. There are some scenarios where you may need this over Sleep(), especially if you're using Sleep in a GUI application.

The XSleep() code uses only Win32 calls, and so it can be used in both MFC and Win32 applications.

To use XSleep() include the XSleep.h file into your project and then call the XSleep() function with the required sleep duration in miliseconds as the parameter.


XSleep(1000); // sleep for 1 second

A demo Visual C++ 6.0 project is available for download. The demo creates two threads and makes them both go to sleep for 2 seconds.

Downloads

Download demo project - 3 Kb


Comments

  • adwczx sj zX hEI itLd pq

    Posted by PiaRbNeAqh on 06/25/2013 02:01pm

    http://www.ami-bonnymethod.org/cgi/brandviagra/#19 does viagra for women work - viagra us online pharmacy

    Reply
  • Problem with handle count

    Posted by Bob20100 on 05/03/2005 06:24am

    I opened Task Manager and I noticed that the count of Handles increased every time I called XSleep. I solved the problem getting the handle returned by CreateHandle and executing CloseHandle() before leaving XSleep() function

    Reply
  • Ok but does not work in a dialog... eats messages and blows up

    Posted by Legacy on 05/08/2000 12:00am

    Originally posted by: Hans Wedemeyer

    Does not work in a dialog.
    Eats mouse messages and if called more than a few times blows away Windows NT...

    Reply
  • Another way

    Posted by Legacy on 01/15/2000 12:00am

    Originally posted by: John Bundgaard

    I have a suggestion for another way of doing this.
    
    I does not need to start a worker thread and will
    support MFC projects better.

    void XSleepAnotherWay(DWORD dwWaitInMSecs)
    {
    DWORD dwStopTime = GetTickCount() + dwWaitInMSecs;
    DWORD dwTimeout = dwWaitInMSecs;
    MSG msg;
    while(1) {
    switch(MsgWaitForMultipleObjects(0, NULL, FALSE, dwTimeout, QS_ALLINPUT)) {
    case WAIT_TIMEOUT:
    break;
    default:
    #ifdef __AFX_H__
    while(::PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE))
    AfxGetApp()->PumpMessage();
    #else
    while(::PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
    ::TranslateMessage(&msg);
    ::DispatchMessage(&msg);
    }
    #endif
    }
    dwTimeout = dwStopTime - GetTickCount();
    if(!dwTimeout || dwTimeout>dwWaitInMSecs)
    break;
    }
    }


    Reply
Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • Thanks to wide spread cloud hosting and innovations small businesses can meet and exceed the legacy systems of goliath corporations. Explore the freedom to work how you want, with a phone system that will adapt to your evolving needs and actually save you lots of expense—read Get an Enterprise Phone System without High Cost and Complexity. The article clearly illustrates: The only hardware you'll need is phone equipment for advanced voice and fax. How to join all your employees, mobile devices, …

  • For the first time in modern history, workplace demographics now span four generations. Understanding the unique social influences that have shaped the behaviors of each is instrumental in creating productive work teams. And when managed effectively, their strengths, perspectives, and experiences can bring synergy in the workplace. Download this white paper for best practices on how to better understand and effectively manage a multi-generational workforce.

Most Popular Programming Stories

More for Developers

RSS Feeds

Thanks for your registration, follow us on our social networks to keep up-to-date