xref: /xsrc/external/mit/xorg-server/dist/hw/xwin/winblock.c

/*
 *Copyright (C) 2001-2004 Harold L Hunt II All Rights Reserved.
 *
 *Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 *"Software"), to deal in the Software without restriction, including
 *without limitation the rights to use, copy, modify, merge, publish,
 *distribute, sublicense, and/or sell copies of the Software, and to
 *permit persons to whom the Software is furnished to do so, subject to
 *the following conditions:
 *
 *The above copyright notice and this permission notice shall be
 *included in all copies or substantial portions of the Software.
 *
 *THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *NONINFRINGEMENT. IN NO EVENT SHALL HAROLD L HUNT II BE LIABLE FOR
 *ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
 *CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 *WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 *Except as contained in this notice, the name of Harold L Hunt II
 *shall not be used in advertising or otherwise to promote the sale, use
 *or other dealings in this Software without prior written authorization
 *from Harold L Hunt II.
 *
 * Authors:	Harold L Hunt II
 */

#ifdef HAVE_XWIN_CONFIG_H
#include <xwin-config.h>
#endif
#include "win.h"
#include "winmsg.h"

/* See Porting Layer Definition - p. 6 */
void
winBlockHandler(ScreenPtr pScreen, void *pTimeout)
{
    winScreenPriv(pScreen);

#ifndef HAS_DEVWINDOWS
    struct timeval **tvp = pTimeout;

    if (*tvp != NULL) {
      if (GetQueueStatus(QS_ALLINPUT | QS_ALLPOSTMESSAGE) != 0) {
        /* If there are still messages to process on the Windows message
           queue, make sure select() just polls rather than blocking.
        */
        (*tvp)->tv_sec = 0;
        (*tvp)->tv_usec = 0;
      }
      else {
        /* Otherwise, lacking /dev/windows, we must wake up again in
           a reasonable time to check the Windows message queue. without
           noticeable delay.
         */
        (*tvp)->tv_sec = 0;
        (*tvp)->tv_usec = 100;
      }
    }
#endif

    /* Signal threaded modules to begin */
    if (pScreenPriv != NULL && !pScreenPriv->fServerStarted) {
        int iReturn;

        winDebug("winBlockHandler - pthread_mutex_unlock()\n");

        /* Flag that modules are to be started */
        pScreenPriv->fServerStarted = TRUE;

        /* Unlock the mutex for threaded modules */
        iReturn = pthread_mutex_unlock(&pScreenPriv->pmServerStarted);
        if (iReturn != 0) {
            ErrorF("winBlockHandler - pthread_mutex_unlock () failed: %d\n",
                   iReturn);
        }
        else {
            winDebug("winBlockHandler - pthread_mutex_unlock () returned\n");
        }
    }

  /*
    At least one X client has asked to suspend the screensaver, so
    reset Windows' display idle timer
  */
#ifdef SCREENSAVER
  if (screenSaverSuspended)
    SetThreadExecutionState(ES_DISPLAY_REQUIRED);
#endif
}