677 lines
16 KiB
C
677 lines
16 KiB
C
/* $XFree86: xc/programs/Xserver/os/WaitFor.c,v 3.43 2003/10/29 04:17:22 dawes Exp $ */
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/***********************************************************
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Copyright 1987, 1998 The Open Group
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Permission to use, copy, modify, distribute, and sell this software and its
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documentation for any purpose is hereby granted without fee, provided that
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the above copyright notice appear in all copies and that both that
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copyright notice and this permission notice appear in supporting
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documentation.
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of The Open Group shall not be
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used in advertising or otherwise to promote the sale, use or other dealings
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in this Software without prior written authorization from The Open Group.
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Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the name of Digital not be
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used in advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
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ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
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DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
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ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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SOFTWARE.
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******************************************************************/
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/* $Xorg: WaitFor.c,v 1.4 2001/02/09 02:05:22 xorgcvs Exp $ */
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/*****************************************************************
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* OS Dependent input routines:
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*
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* WaitForSomething
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* TimerForce, TimerSet, TimerCheck, TimerFree
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*
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*****************************************************************/
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#ifdef WIN32
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#include <X11/Xwinsock.h>
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#endif
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#include "Xos.h" /* for strings, fcntl, time */
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#include <errno.h>
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#include <stdio.h>
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#include "X.h"
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#include "misc.h"
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#ifdef __UNIXOS2__
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#define select(n,r,w,x,t) os2PseudoSelect(n,r,w,x,t)
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#endif
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#include "osdep.h"
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#include <X11/Xpoll.h>
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#include "dixstruct.h"
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#include "opaque.h"
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#ifdef DPMSExtension
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#include "dpmsproc.h"
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#endif
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/* modifications by raphael */
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int
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mffs(fd_mask mask)
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{
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int i;
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if (!mask) return 0;
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i = 1;
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while (!(mask & 1))
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{
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i++;
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mask >>= 1;
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}
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return i;
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}
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#ifdef DPMSExtension
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#define DPMS_SERVER
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#include "dpms.h"
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#endif
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#ifdef XTESTEXT1
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/*
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* defined in xtestext1dd.c
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*/
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extern int playback_on;
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#endif /* XTESTEXT1 */
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struct _OsTimerRec {
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OsTimerPtr next;
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CARD32 expires;
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OsTimerCallback callback;
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pointer arg;
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};
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static void DoTimer(OsTimerPtr timer, CARD32 now, OsTimerPtr *prev);
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static OsTimerPtr timers = NULL;
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/*****************
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* WaitForSomething:
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* Make the server suspend until there is
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* 1. data from clients or
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* 2. input events available or
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* 3. ddx notices something of interest (graphics
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* queue ready, etc.) or
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* 4. clients that have buffered replies/events are ready
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*
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* If the time between INPUT events is
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* greater than ScreenSaverTime, the display is turned off (or
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* saved, depending on the hardware). So, WaitForSomething()
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* has to handle this also (that's why the select() has a timeout.
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* For more info on ClientsWithInput, see ReadRequestFromClient().
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* pClientsReady is an array to store ready client->index values into.
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*****************/
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int
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WaitForSomething(int *pClientsReady)
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{
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int i;
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struct timeval waittime, *wt;
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INT32 timeout = 0;
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fd_set clientsReadable;
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fd_set clientsWritable;
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int curclient;
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int selecterr;
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int nready;
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fd_set devicesReadable;
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CARD32 now = 0;
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#ifdef SMART_SCHEDULE
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Bool someReady = FALSE;
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#endif
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FD_ZERO(&clientsReadable);
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/* We need a while loop here to handle
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crashed connections and the screen saver timeout */
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while (1)
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{
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/* deal with any blocked jobs */
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if (workQueue)
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ProcessWorkQueue();
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if (XFD_ANYSET (&ClientsWithInput))
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{
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#ifdef SMART_SCHEDULE
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if (!SmartScheduleDisable)
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{
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someReady = TRUE;
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waittime.tv_sec = 0;
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waittime.tv_usec = 0;
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wt = &waittime;
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}
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else
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#endif
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{
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XFD_COPYSET (&ClientsWithInput, &clientsReadable);
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break;
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}
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}
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#ifdef SMART_SCHEDULE
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if (someReady)
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{
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XFD_COPYSET(&AllSockets, &LastSelectMask);
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XFD_UNSET(&LastSelectMask, &ClientsWithInput);
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}
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else
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{
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#endif
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wt = NULL;
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if (timers)
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{
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now = GetTimeInMillis();
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timeout = timers->expires - now;
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if (timeout < 0)
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timeout = 0;
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waittime.tv_sec = timeout / MILLI_PER_SECOND;
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waittime.tv_usec = (timeout % MILLI_PER_SECOND) *
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(1000000 / MILLI_PER_SECOND);
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wt = &waittime;
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}
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XFD_COPYSET(&AllSockets, &LastSelectMask);
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#ifdef SMART_SCHEDULE
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}
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SmartScheduleIdle = TRUE;
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#endif
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BlockHandler((pointer)&wt, (pointer)&LastSelectMask);
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if (NewOutputPending)
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FlushAllOutput();
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#ifdef XTESTEXT1
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/* XXX how does this interact with new write block handling? */
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if (playback_on) {
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wt = &waittime;
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XTestComputeWaitTime (&waittime);
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}
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#endif /* XTESTEXT1 */
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/* keep this check close to select() call to minimize race */
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if (dispatchException)
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i = -1;
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else if (AnyClientsWriteBlocked)
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{
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XFD_COPYSET(&ClientsWriteBlocked, &clientsWritable);
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i = Select (MaxClients, &LastSelectMask, &clientsWritable, NULL, wt);
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}
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else
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{
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i = Select (MaxClients, &LastSelectMask, NULL, NULL, wt);
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}
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selecterr = errno;
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WakeupHandler(i, (pointer)&LastSelectMask);
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#ifdef XTESTEXT1
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if (playback_on) {
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i = XTestProcessInputAction (i, &waittime);
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}
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#endif /* XTESTEXT1 */
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#ifdef SMART_SCHEDULE
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if (i >= 0)
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{
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SmartScheduleIdle = FALSE;
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SmartScheduleIdleCount = 0;
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if (SmartScheduleTimerStopped)
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(void) SmartScheduleStartTimer ();
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}
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#endif
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if (i <= 0) /* An error or timeout occurred */
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{
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if (dispatchException)
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return 0;
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if (i < 0)
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{
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if (selecterr == EBADF) /* Some client disconnected */
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{
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CheckConnections ();
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if (! XFD_ANYSET (&AllClients))
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return 0;
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}
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else if (selecterr == EINVAL)
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{
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FatalError("WaitForSomething(): select: errno=%d\n",
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selecterr);
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}
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else if (selecterr != EINTR)
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{
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ErrorF("WaitForSomething(): select: errno=%d\n",
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selecterr);
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}
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}
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#ifdef SMART_SCHEDULE
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else if (someReady)
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{
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/*
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* If no-one else is home, bail quickly
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*/
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XFD_COPYSET(&ClientsWithInput, &LastSelectMask);
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XFD_COPYSET(&ClientsWithInput, &clientsReadable);
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break;
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}
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#endif
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if (*checkForInput[0] != *checkForInput[1])
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return 0;
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if (timers)
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{
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int expired = 0;
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now = GetTimeInMillis();
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if ((int) (timers->expires - now) <= 0)
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expired = 1;
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while (timers && (int) (timers->expires - now) <= 0)
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DoTimer(timers, now, &timers);
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if (expired)
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return 0;
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}
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}
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else
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{
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fd_set tmp_set;
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if (*checkForInput[0] == *checkForInput[1]) {
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if (timers)
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{
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int expired = 0;
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now = GetTimeInMillis();
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if ((int) (timers->expires - now) <= 0)
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expired = 1;
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while (timers && (int) (timers->expires - now) <= 0)
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DoTimer(timers, now, &timers);
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if (expired)
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return 0;
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}
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}
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#ifdef SMART_SCHEDULE
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if (someReady)
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XFD_ORSET(&LastSelectMask, &ClientsWithInput, &LastSelectMask);
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#endif
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if (AnyClientsWriteBlocked && XFD_ANYSET (&clientsWritable))
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{
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NewOutputPending = TRUE;
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XFD_ORSET(&OutputPending, &clientsWritable, &OutputPending);
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XFD_UNSET(&ClientsWriteBlocked, &clientsWritable);
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if (! XFD_ANYSET(&ClientsWriteBlocked))
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AnyClientsWriteBlocked = FALSE;
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}
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XFD_ANDSET(&devicesReadable, &LastSelectMask, &EnabledDevices);
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XFD_ANDSET(&clientsReadable, &LastSelectMask, &AllClients);
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XFD_ANDSET(&tmp_set, &LastSelectMask, &WellKnownConnections);
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if (XFD_ANYSET(&tmp_set))
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QueueWorkProc(EstablishNewConnections, NULL,
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(pointer)&LastSelectMask);
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#ifdef DPMSExtension
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if (XFD_ANYSET (&devicesReadable) && (DPMSPowerLevel != DPMSModeOn))
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DPMSSet(DPMSModeOn);
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#endif
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if (XFD_ANYSET (&devicesReadable) || XFD_ANYSET (&clientsReadable))
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break;
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}
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}
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nready = 0;
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if (XFD_ANYSET (&clientsReadable))
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{
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#ifndef WIN32
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for (i=0; i<howmany(XFD_SETSIZE, NFDBITS); i++)
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{
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int highest_priority = 0;
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while (clientsReadable.fds_bits[i])
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{
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int client_priority, client_index;
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curclient = ffs (clientsReadable.fds_bits[i]) - 1;
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client_index = /* raphael: modified */
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ConnectionTranslation[curclient + (i * (sizeof(fd_mask) * 8))];
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#else
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int highest_priority = 0;
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fd_set savedClientsReadable;
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XFD_COPYSET(&clientsReadable, &savedClientsReadable);
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for (i = 0; i < XFD_SETCOUNT(&savedClientsReadable); i++)
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{
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int client_priority, client_index;
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curclient = XFD_FD(&savedClientsReadable, i);
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client_index = ConnectionTranslation[curclient];
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#endif
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#ifdef XSYNC
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/* We implement "strict" priorities.
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* Only the highest priority client is returned to
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* dix. If multiple clients at the same priority are
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* ready, they are all returned. This means that an
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* aggressive client could take over the server.
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* This was not considered a big problem because
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* aggressive clients can hose the server in so many
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* other ways :)
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*/
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client_priority = clients[client_index]->priority;
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if (nready == 0 || client_priority > highest_priority)
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{
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/* Either we found the first client, or we found
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* a client whose priority is greater than all others
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* that have been found so far. Either way, we want
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* to initialize the list of clients to contain just
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* this client.
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*/
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pClientsReady[0] = client_index;
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highest_priority = client_priority;
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nready = 1;
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}
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/* the following if makes sure that multiple same-priority
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* clients get batched together
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*/
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else if (client_priority == highest_priority)
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#endif
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{
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pClientsReady[nready++] = client_index;
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}
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#ifndef WIN32
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clientsReadable.fds_bits[i] &= ~(((fd_mask)1L) << curclient);
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}
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#else
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FD_CLR(curclient, &clientsReadable);
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#endif
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}
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}
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return nready;
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}
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#if 0
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/*
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* This is not always a macro.
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*/
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ANYSET(FdMask *src)
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{
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int i;
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for (i=0; i<mskcnt; i++)
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if (src[ i ])
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return (TRUE);
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return (FALSE);
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}
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#endif
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static void
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DoTimer(OsTimerPtr timer, CARD32 now, OsTimerPtr *prev)
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{
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CARD32 newTime;
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*prev = timer->next;
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timer->next = NULL;
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newTime = (*timer->callback)(timer, now, timer->arg);
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if (newTime)
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TimerSet(timer, 0, newTime, timer->callback, timer->arg);
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}
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OsTimerPtr
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TimerSet(OsTimerPtr timer, int flags, CARD32 millis,
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OsTimerCallback func, pointer arg)
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{
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register OsTimerPtr *prev;
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CARD32 now = GetTimeInMillis();
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if (!timer)
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{
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timer = (OsTimerPtr)xalloc(sizeof(struct _OsTimerRec));
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if (!timer)
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return NULL;
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}
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else
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{
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for (prev = &timers; *prev; prev = &(*prev)->next)
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{
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if (*prev == timer)
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{
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*prev = timer->next;
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if (flags & TimerForceOld)
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(void)(*timer->callback)(timer, now, timer->arg);
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break;
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}
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}
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}
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if (!millis)
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return timer;
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if (!(flags & TimerAbsolute))
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millis += now;
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timer->expires = millis;
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timer->callback = func;
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timer->arg = arg;
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if ((int) (millis - now) <= 0)
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{
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timer->next = NULL;
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millis = (*timer->callback)(timer, now, timer->arg);
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if (!millis)
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return timer;
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}
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for (prev = &timers;
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*prev && (int) ((*prev)->expires - millis) <= 0;
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prev = &(*prev)->next)
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;
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timer->next = *prev;
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*prev = timer;
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return timer;
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}
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Bool
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TimerForce(OsTimerPtr timer)
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{
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OsTimerPtr *prev;
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for (prev = &timers; *prev; prev = &(*prev)->next)
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{
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if (*prev == timer)
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{
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DoTimer(timer, GetTimeInMillis(), prev);
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return TRUE;
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}
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}
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return FALSE;
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}
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void
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TimerCancel(OsTimerPtr timer)
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{
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OsTimerPtr *prev;
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if (!timer)
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return;
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for (prev = &timers; *prev; prev = &(*prev)->next)
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{
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if (*prev == timer)
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{
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*prev = timer->next;
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break;
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}
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}
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}
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void
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TimerFree(OsTimerPtr timer)
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{
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if (!timer)
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return;
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TimerCancel(timer);
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xfree(timer);
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}
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void
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TimerCheck(void)
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{
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CARD32 now = GetTimeInMillis();
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while (timers && (int) (timers->expires - now) <= 0)
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DoTimer(timers, now, &timers);
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}
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void
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TimerInit(void)
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{
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OsTimerPtr timer;
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while ((timer = timers))
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{
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timers = timer->next;
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xfree(timer);
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}
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}
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static CARD32
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ScreenSaverTimeoutExpire(OsTimerPtr timer,CARD32 now,pointer arg)
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{
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INT32 timeout = now - lastDeviceEventTime.milliseconds;
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if (timeout < ScreenSaverTime) {
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return ScreenSaverTime - timeout;
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}
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ResetOsBuffers(); /* not ideal, but better than nothing */
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SaveScreens(SCREEN_SAVER_ON, ScreenSaverActive);
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#ifdef DPMSExtension
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if (ScreenSaverInterval > 0 && DPMSPowerLevel == DPMSModeOn)
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#else
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if (ScreenSaverInterval > 0)
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#endif /* DPMSExtension */
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return ScreenSaverInterval;
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return 0;
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}
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static OsTimerPtr ScreenSaverTimer = NULL;
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void
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FreeScreenSaverTimer(void)
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{
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if (ScreenSaverTimer) {
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TimerFree(ScreenSaverTimer);
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ScreenSaverTimer = NULL;
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}
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}
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void
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SetScreenSaverTimer(void)
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{
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if (ScreenSaverTime > 0) {
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ScreenSaverTimer = TimerSet(ScreenSaverTimer, 0, ScreenSaverTime,
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ScreenSaverTimeoutExpire, NULL);
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} else if (ScreenSaverTimer) {
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FreeScreenSaverTimer();
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}
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}
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#ifdef DPMSExtension
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static OsTimerPtr DPMSStandbyTimer = NULL;
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static OsTimerPtr DPMSSuspendTimer = NULL;
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static OsTimerPtr DPMSOffTimer = NULL;
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static CARD32
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DPMSStandbyTimerExpire(OsTimerPtr timer,CARD32 now,pointer arg)
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{
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INT32 timeout = now - lastDeviceEventTime.milliseconds;
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if (timeout < DPMSStandbyTime) {
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return DPMSStandbyTime - timeout;
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}
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if (DPMSPowerLevel < DPMSModeStandby) {
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DPMSSet(DPMSModeStandby);
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}
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return DPMSStandbyTime;
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}
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|
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static CARD32
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|
DPMSSuspendTimerExpire(OsTimerPtr timer,CARD32 now,pointer arg)
|
|
{
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INT32 timeout = now - lastDeviceEventTime.milliseconds;
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|
|
|
if (timeout < DPMSSuspendTime) {
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return DPMSSuspendTime - timeout;
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}
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if (DPMSPowerLevel < DPMSModeSuspend) {
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DPMSSet(DPMSModeSuspend);
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}
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return DPMSSuspendTime;
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}
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|
|
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static CARD32
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|
DPMSOffTimerExpire(OsTimerPtr timer,CARD32 now,pointer arg)
|
|
{
|
|
INT32 timeout = now - lastDeviceEventTime.milliseconds;
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|
|
|
if (timeout < DPMSOffTime) {
|
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return DPMSOffTime - timeout;
|
|
}
|
|
if (DPMSPowerLevel < DPMSModeOff) {
|
|
DPMSSet(DPMSModeOff);
|
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}
|
|
return DPMSOffTime;
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}
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|
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void
|
|
FreeDPMSTimers(void)
|
|
{
|
|
if (DPMSStandbyTimer) {
|
|
TimerFree(DPMSStandbyTimer);
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DPMSStandbyTimer = NULL;
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|
}
|
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if (DPMSSuspendTimer) {
|
|
TimerFree(DPMSSuspendTimer);
|
|
DPMSSuspendTimer = NULL;
|
|
}
|
|
if (DPMSOffTimer) {
|
|
TimerFree(DPMSOffTimer);
|
|
DPMSOffTimer = NULL;
|
|
}
|
|
}
|
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|
|
void
|
|
SetDPMSTimers(void)
|
|
{
|
|
if (!DPMSEnabled)
|
|
return;
|
|
|
|
if (DPMSStandbyTime > 0) {
|
|
DPMSStandbyTimer = TimerSet(DPMSStandbyTimer, 0, DPMSStandbyTime,
|
|
DPMSStandbyTimerExpire, NULL);
|
|
}
|
|
if (DPMSSuspendTime > 0) {
|
|
DPMSSuspendTimer = TimerSet(DPMSSuspendTimer, 0, DPMSSuspendTime,
|
|
DPMSSuspendTimerExpire, NULL);
|
|
}
|
|
if (DPMSOffTime > 0) {
|
|
DPMSOffTimer = TimerSet(DPMSOffTimer, 0, DPMSOffTime,
|
|
DPMSOffTimerExpire, NULL);
|
|
}
|
|
}
|
|
#endif
|