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+/* $XFree86: xc/programs/Xserver/os/WaitFor.c,v 3.42 2003/10/16 01:33:35 dawes Exp $ */
+/***********************************************************
+
+Copyright 1987, 1998 The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+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 THE
+OPEN GROUP 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 The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+
+
+Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
+
+ All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its
+documentation for any purpose and without fee is hereby granted,
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in
+supporting documentation, and that the name of Digital not be
+used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.
+
+DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+SOFTWARE.
+
+******************************************************************/
+
+/* $Xorg: WaitFor.c,v 1.4 2001/02/09 02:05:22 xorgcvs Exp $ */
+
+/**************************************************************************/
+/* */
+/* Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com/. */
+/* */
+/* NX-X11, NX protocol compression and NX extensions to this software */
+/* are copyright of NoMachine. Redistribution and use of the present */
+/* software is allowed according to terms specified in the file LICENSE */
+/* which comes in the source distribution. */
+/* */
+/* Check http://www.nomachine.com/licensing.html for applicability. */
+/* */
+/* NX and NoMachine are trademarks of NoMachine S.r.l. */
+/* */
+/* All rights reserved. */
+/* */
+/**************************************************************************/
+
+/*****************************************************************
+ * OS Dependent input routines:
+ *
+ * WaitForSomething
+ * TimerForce, TimerSet, TimerCheck, TimerFree
+ *
+ *****************************************************************/
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#ifdef WIN32
+#include <X11/Xwinsock.h>
+#endif
+#include <X11/Xos.h> /* for strings, fcntl, time */
+#include <errno.h>
+#include <stdio.h>
+#include <X11/X.h>
+#include "misc.h"
+
+#ifdef __UNIXOS2__
+#define select(n,r,w,x,t) os2PseudoSelect(n,r,w,x,t)
+#endif
+#include "osdep.h"
+#include <X11/Xpoll.h>
+#include "dixstruct.h"
+#include "opaque.h"
+#ifdef DPMSExtension
+#include "dpmsproc.h"
+#endif
+
+#if defined(NX_TRANS_SOCKET) && defined(NX_TRANS_WAKEUP)
+
+static unsigned long startTimeInMillis;
+
+#endif
+
+#ifdef WIN32
+/* Error codes from windows sockets differ from fileio error codes */
+#undef EINTR
+#define EINTR WSAEINTR
+#undef EINVAL
+#define EINVAL WSAEINVAL
+#undef EBADF
+#define EBADF WSAENOTSOCK
+/* Windows select does not set errno. Use GetErrno as wrapper for
+ WSAGetLastError */
+#define GetErrno WSAGetLastError
+#else
+/* This is just a fallback to errno to hide the differences between unix and
+ Windows in the code */
+#define GetErrno() errno
+#endif
+
+/* modifications by raphael */
+int
+mffs(fd_mask mask)
+{
+ int i;
+
+ if (!mask) return 0;
+ i = 1;
+ while (!(mask & 1))
+ {
+ i++;
+ mask >>= 1;
+ }
+ return i;
+}
+
+#ifdef DPMSExtension
+#define DPMS_SERVER
+#include <X11/extensions/dpms.h>
+#endif
+
+#ifdef XTESTEXT1
+/*
+ * defined in xtestext1dd.c
+ */
+extern int playback_on;
+#endif /* XTESTEXT1 */
+
+struct _OsTimerRec {
+ OsTimerPtr next;
+ CARD32 expires;
+ OsTimerCallback callback;
+ pointer arg;
+};
+
+static void DoTimer(OsTimerPtr timer, CARD32 now, OsTimerPtr *prev);
+static OsTimerPtr timers = NULL;
+
+/*****************
+ * WaitForSomething:
+ * Make the server suspend until there is
+ * 1. data from clients or
+ * 2. input events available or
+ * 3. ddx notices something of interest (graphics
+ * queue ready, etc.) or
+ * 4. clients that have buffered replies/events are ready
+ *
+ * If the time between INPUT events is
+ * greater than ScreenSaverTime, the display is turned off (or
+ * saved, depending on the hardware). So, WaitForSomething()
+ * has to handle this also (that's why the select() has a timeout.
+ * For more info on ClientsWithInput, see ReadRequestFromClient().
+ * pClientsReady is an array to store ready client->index values into.
+ *****************/
+
+int
+WaitForSomething(int *pClientsReady)
+{
+ int i;
+ struct timeval waittime, *wt;
+ INT32 timeout = 0;
+ fd_set clientsReadable;
+ fd_set clientsWritable;
+ int curclient;
+ int selecterr;
+ int nready;
+ fd_set devicesReadable;
+ CARD32 now = 0;
+#ifdef SMART_SCHEDULE
+ Bool someReady = FALSE;
+#endif
+
+#if defined(NX_TRANS_SOCKET) && defined(NX_TRANS_DEBUG)
+ fprintf(stderr, "WaitForSomething: Got called.\n");
+#endif
+
+ FD_ZERO(&clientsReadable);
+
+#if defined(NX_TRANS_SOCKET) && defined(NX_TRANS_WAKEUP)
+
+ startTimeInMillis = GetTimeInMillis();
+
+#endif
+
+ /* We need a while loop here to handle
+ crashed connections and the screen saver timeout */
+ while (1)
+ {
+ /* deal with any blocked jobs */
+ if (workQueue)
+ ProcessWorkQueue();
+ if (XFD_ANYSET (&ClientsWithInput))
+ {
+#ifdef SMART_SCHEDULE
+ if (!SmartScheduleDisable)
+ {
+ someReady = TRUE;
+ waittime.tv_sec = 0;
+ waittime.tv_usec = 0;
+ wt = &waittime;
+ }
+ else
+#endif
+ {
+ XFD_COPYSET (&ClientsWithInput, &clientsReadable);
+ break;
+ }
+ }
+#ifdef SMART_SCHEDULE
+ if (someReady)
+ {
+ XFD_COPYSET(&AllSockets, &LastSelectMask);
+ XFD_UNSET(&LastSelectMask, &ClientsWithInput);
+ }
+ else
+ {
+#endif
+ wt = NULL;
+ if (timers)
+ {
+ now = GetTimeInMillis();
+ timeout = timers->expires - now;
+ if (timeout < 0)
+ timeout = 0;
+ waittime.tv_sec = timeout / MILLI_PER_SECOND;
+ waittime.tv_usec = (timeout % MILLI_PER_SECOND) *
+ (1000000 / MILLI_PER_SECOND);
+ wt = &waittime;
+ }
+ XFD_COPYSET(&AllSockets, &LastSelectMask);
+#ifdef SMART_SCHEDULE
+ }
+ SmartScheduleIdle = TRUE;
+#endif
+ BlockHandler((pointer)&wt, (pointer)&LastSelectMask);
+ if (NewOutputPending)
+ FlushAllOutput();
+#ifdef XTESTEXT1
+ /* XXX how does this interact with new write block handling? */
+ if (playback_on) {
+ wt = &waittime;
+ XTestComputeWaitTime (&waittime);
+ }
+#endif /* XTESTEXT1 */
+
+#if defined(NX_TRANS_SOCKET) && defined(NX_TRANS_WAKEUP)
+
+ /*
+ * If caller has marked the first element of pClientsReady[],
+ * bail out of select after a short timeout. We need this to
+ * let the NX agent remove the splash screen when the timeout
+ * is expired. A better option would be to use the existing
+ * screen-saver timeout but it can be modified by clients, so
+ * we would need a special handling. This hack is trivial and
+ * keeps WaitForSomething() backward compatible with the exis-
+ * ting servers.
+ */
+
+ if (pClientsReady[0] == -1)
+ {
+ unsigned long timeoutInMillis;
+
+#if defined(NX_TRANS_SOCKET) && defined(NX_TRANS_WAKEUP) && defined(NX_TRANS_DEBUG)
+ fprintf(stderr, "WaitForSomething: pClientsReady[0] is [%d], pClientsReady[1] is [%d].\n",
+ pClientsReady[0], pClientsReady[1]);
+#endif
+
+ timeoutInMillis = GetTimeInMillis();
+
+ if (timeoutInMillis - startTimeInMillis >= NX_TRANS_WAKEUP)
+ {
+#if defined(NX_TRANS_SOCKET) && defined(NX_TRANS_WAKEUP) && defined(NX_TRANS_DEBUG)
+ fprintf(stderr, "WaitForSomething: Returning 0 because of wakeup timeout.\n");
+#endif
+ return 0;
+ }
+
+ timeoutInMillis = NX_TRANS_WAKEUP - (timeoutInMillis - startTimeInMillis);
+
+#if defined(NX_TRANS_SOCKET) && defined(NX_TRANS_WAKEUP) && defined(NX_TRANS_DEBUG)
+ fprintf(stderr, "WaitForSomething: Milliseconds to next wakeup are %ld.\n",
+ timeoutInMillis);
+#endif
+ if (wt == NULL || (wt -> tv_sec * MILLI_PER_SECOND +
+ wt -> tv_usec / MILLI_PER_SECOND) > timeoutInMillis)
+ {
+ if ((waittime.tv_sec * MILLI_PER_SECOND +
+ waittime.tv_usec / MILLI_PER_SECOND) > timeoutInMillis)
+ {
+ waittime.tv_sec = timeoutInMillis / MILLI_PER_SECOND;
+ waittime.tv_usec = (timeoutInMillis * MILLI_PER_SECOND) %
+ (MILLI_PER_SECOND * 1000);
+ wt = &waittime;
+ }
+
+#if defined(NX_TRANS_SOCKET) && defined(NX_TRANS_WAKEUP) && defined(NX_TRANS_DEBUG)
+ fprintf(stderr, "WaitForSomething: Next wakeup timeout set to %ld milliseconds.\n",
+ (waittime.tv_sec * MILLI_PER_SECOND) +
+ (waittime.tv_usec / MILLI_PER_SECOND));
+#endif
+ }
+#if defined(NX_TRANS_SOCKET) && defined(NX_TRANS_WAKEUP) && defined(NX_TRANS_DEBUG)
+ else
+ {
+ fprintf(stderr, "WaitForSomething: Using existing timeout of %ld milliseconds.\n",
+ (waittime.tv_sec * MILLI_PER_SECOND) +
+ (waittime.tv_usec / MILLI_PER_SECOND));
+ }
+#endif
+ }
+#endif
+
+ /* keep this check close to select() call to minimize race */
+#if defined(NX_TRANS_SOCKET) && defined(NX_TRANS_DEBUG)
+ if (dispatchException)
+ {
+ i = -1;
+
+ fprintf(stderr, "WaitForSomething: Value of dispatchException is true. Set i = -1.\n");
+ }
+#else
+ if (dispatchException)
+ i = -1;
+#endif
+ else if (AnyClientsWriteBlocked)
+ {
+#if defined(NX_TRANS_SOCKET) && defined(NX_TRANS_DEBUG)
+ if (wt == NULL)
+ {
+ fprintf(stderr, "WaitForSomething: Executing select with LastSelectMask and "
+ "clientsWritable and null timeout.\n");
+ }
+ else
+ {
+ fprintf(stderr, "WaitForSomething: Executing select with LastSelectMask, "
+ "clientsWritable, %ld secs and %ld usecs.\n",
+ wt -> tv_sec, wt -> tv_usec);
+ }
+#endif
+ XFD_COPYSET(&ClientsWriteBlocked, &clientsWritable);
+ i = Select (MaxClients, &LastSelectMask, &clientsWritable, NULL, wt);
+ }
+ else
+ {
+#if defined(NX_TRANS_SOCKET) && defined(NX_TRANS_DEBUG)
+ if (wt == NULL)
+ {
+ fprintf(stderr, "WaitForSomething: Executing select with LastSelectMask and null timeout.\n");
+ }
+ else
+ {
+ fprintf(stderr, "WaitForSomething: Executing select with LastSelectMask, %ld secs and %ld usecs.\n",
+ wt -> tv_sec, wt -> tv_usec);
+ }
+#endif
+ i = Select (MaxClients, &LastSelectMask, NULL, NULL, wt);
+ }
+#if defined(NX_TRANS_SOCKET) && defined(NX_TRANS_DEBUG)
+ fprintf(stderr, "WaitForSomething: Bailed out with i = [%d] and errno = [%d].\n", i, errno);
+
+ if (i < 0)
+ {
+ fprintf(stderr, "WaitForSomething: Error is [%s].\n", strerror(errno));
+ }
+#endif
+ selecterr = GetErrno();
+ WakeupHandler(i, (pointer)&LastSelectMask);
+#ifdef XTESTEXT1
+ if (playback_on) {
+ i = XTestProcessInputAction (i, &waittime);
+ }
+#endif /* XTESTEXT1 */
+#ifdef SMART_SCHEDULE
+ if (i >= 0)
+ {
+ SmartScheduleIdle = FALSE;
+ SmartScheduleIdleCount = 0;
+ if (SmartScheduleTimerStopped)
+ (void) SmartScheduleStartTimer ();
+ }
+#endif
+ if (i <= 0) /* An error or timeout occurred */
+ {
+#if defined(NX_TRANS_SOCKET) && defined(NX_TRANS_DEBUG)
+ if (dispatchException)
+ {
+ fprintf(stderr, "WaitForSomething: Returning 0 because of (dispatchException).\n");
+ return 0;
+ }
+#else
+ if (dispatchException)
+ return 0;
+#endif
+ if (i < 0)
+ {
+ if (selecterr == EBADF) /* Some client disconnected */
+ {
+ CheckConnections ();
+#if defined(NX_TRANS_SOCKET) && defined(NX_TRANS_DEBUG)
+ if (! XFD_ANYSET (&AllClients))
+ {
+ fprintf(stderr, "WaitForSomething: Returning 0 because of (! XFD_ANYSET (&AllClients)).\n");
+ return 0;
+ }
+#else
+ if (! XFD_ANYSET (&AllClients))
+ return 0;
+#endif
+ }
+ else if (selecterr == EINVAL)
+ {
+ FatalError("WaitForSomething(): select: errno=%d\n",
+ selecterr);
+ }
+ else if (selecterr != EINTR)
+ {
+ ErrorF("WaitForSomething(): select: errno=%d\n",
+ selecterr);
+ }
+ }
+#ifdef SMART_SCHEDULE
+ else if (someReady)
+ {
+ /*
+ * If no-one else is home, bail quickly
+ */
+ XFD_COPYSET(&ClientsWithInput, &LastSelectMask);
+ XFD_COPYSET(&ClientsWithInput, &clientsReadable);
+ break;
+ }
+#endif
+#if defined(NX_TRANS_SOCKET)
+ if (*checkForInput[0] != *checkForInput[1])
+ {
+#if defined(NX_TRANS_SOCKET) && defined(NX_TRANS_DEBUG)
+ fprintf(stderr, "WaitForSomething: Returning 0 because of (*checkForInput[0] != *checkForInput[1]).\n");
+#endif
+ return 0;
+ }
+#else
+ if (*checkForInput[0] != *checkForInput[1])
+ return 0;
+#endif
+
+ if (timers)
+ {
+ int expired = 0;
+ now = GetTimeInMillis();
+ if ((int) (timers->expires - now) <= 0)
+ expired = 1;
+
+ while (timers && (int) (timers->expires - now) <= 0)
+ DoTimer(timers, now, &timers);
+
+ if (expired)
+ return 0;
+ }
+ }
+ else
+ {
+ fd_set tmp_set;
+
+ if (*checkForInput[0] == *checkForInput[1]) {
+ if (timers)
+ {
+ int expired = 0;
+ now = GetTimeInMillis();
+ if ((int) (timers->expires - now) <= 0)
+ expired = 1;
+
+ while (timers && (int) (timers->expires - now) <= 0)
+ DoTimer(timers, now, &timers);
+
+ if (expired)
+ return 0;
+ }
+ }
+#ifdef SMART_SCHEDULE
+ if (someReady)
+ XFD_ORSET(&LastSelectMask, &ClientsWithInput, &LastSelectMask);
+#endif
+ if (AnyClientsWriteBlocked && XFD_ANYSET (&clientsWritable))
+ {
+ NewOutputPending = TRUE;
+ XFD_ORSET(&OutputPending, &clientsWritable, &OutputPending);
+ XFD_UNSET(&ClientsWriteBlocked, &clientsWritable);
+ if (! XFD_ANYSET(&ClientsWriteBlocked))
+ AnyClientsWriteBlocked = FALSE;
+ }
+
+ XFD_ANDSET(&devicesReadable, &LastSelectMask, &EnabledDevices);
+ XFD_ANDSET(&clientsReadable, &LastSelectMask, &AllClients);
+ XFD_ANDSET(&tmp_set, &LastSelectMask, &WellKnownConnections);
+ if (XFD_ANYSET(&tmp_set))
+ QueueWorkProc(EstablishNewConnections, NULL,
+ (pointer)&LastSelectMask);
+#ifdef DPMSExtension
+ if (XFD_ANYSET (&devicesReadable) && (DPMSPowerLevel != DPMSModeOn))
+ DPMSSet(DPMSModeOn);
+#endif
+ if (XFD_ANYSET (&devicesReadable) || XFD_ANYSET (&clientsReadable))
+ break;
+#ifdef WIN32
+ /* Windows keyboard and mouse events are added to the input queue
+ in Block- and WakupHandlers. There is no device to check if
+ data is ready. So check here if new input is available */
+#if defined(NX_TRANS_SOCKET)
+ if (*checkForInput[0] != *checkForInput[1])
+ {
+#if defined(NX_TRANS_SOCKET) && defined(NX_TRANS_DEBUG)
+ fprintf(stderr, "WaitForSomething: Returning 0 because of (*checkForInput[0] != *checkForInput[1]).\n");
+#endif
+ return 0;
+ }
+#else
+ if (*checkForInput[0] != *checkForInput[1])
+ return 0;
+#endif
+#endif
+ }
+ }
+
+ nready = 0;
+ if (XFD_ANYSET (&clientsReadable))
+ {
+#ifndef WIN32
+ for (i=0; i<howmany(XFD_SETSIZE, NFDBITS); i++)
+ {
+ int highest_priority = 0;
+
+ while (clientsReadable.fds_bits[i])
+ {
+ int client_priority, client_index;
+
+ curclient = ffs (clientsReadable.fds_bits[i]) - 1;
+ client_index = /* raphael: modified */
+ ConnectionTranslation[curclient + (i * (sizeof(fd_mask) * 8))];
+#else
+ int highest_priority = 0;
+ fd_set savedClientsReadable;
+ XFD_COPYSET(&clientsReadable, &savedClientsReadable);
+ for (i = 0; i < XFD_SETCOUNT(&savedClientsReadable); i++)
+ {
+ int client_priority, client_index;
+
+ curclient = XFD_FD(&savedClientsReadable, i);
+ client_index = GetConnectionTranslation(curclient);
+#endif
+#ifdef XSYNC
+ /* We implement "strict" priorities.
+ * Only the highest priority client is returned to
+ * dix. If multiple clients at the same priority are
+ * ready, they are all returned. This means that an
+ * aggressive client could take over the server.
+ * This was not considered a big problem because
+ * aggressive clients can hose the server in so many
+ * other ways :)
+ */
+ client_priority = clients[client_index]->priority;
+ if (nready == 0 || client_priority > highest_priority)
+ {
+ /* Either we found the first client, or we found
+ * a client whose priority is greater than all others
+ * that have been found so far. Either way, we want
+ * to initialize the list of clients to contain just
+ * this client.
+ */
+ pClientsReady[0] = client_index;
+ highest_priority = client_priority;
+ nready = 1;
+ }
+ /* the following if makes sure that multiple same-priority
+ * clients get batched together
+ */
+ else if (client_priority == highest_priority)
+#endif
+ {
+ pClientsReady[nready++] = client_index;
+ }
+#ifndef WIN32
+ clientsReadable.fds_bits[i] &= ~(((fd_mask)1L) << curclient);
+ }
+#else
+ FD_CLR(curclient, &clientsReadable);
+#endif
+ }
+ }
+#if defined(NX_TRANS_SOCKET) && defined(NX_TRANS_DEBUG)
+ fprintf(stderr, "WaitForSomething: Returning nready.\n");
+#endif
+ return nready;
+}
+
+#if 0
+/*
+ * This is not always a macro.
+ */
+ANYSET(FdMask *src)
+{
+ int i;
+
+ for (i=0; i<mskcnt; i++)
+ if (src[ i ])
+ return (TRUE);
+ return (FALSE);
+}
+#endif
+
+
+static void
+DoTimer(OsTimerPtr timer, CARD32 now, OsTimerPtr *prev)
+{
+ CARD32 newTime;
+
+ *prev = timer->next;
+ timer->next = NULL;
+ newTime = (*timer->callback)(timer, now, timer->arg);
+ if (newTime)
+ TimerSet(timer, 0, newTime, timer->callback, timer->arg);
+}
+
+OsTimerPtr
+TimerSet(OsTimerPtr timer, int flags, CARD32 millis,
+ OsTimerCallback func, pointer arg)
+{
+ register OsTimerPtr *prev;
+ CARD32 now = GetTimeInMillis();
+
+ if (!timer)
+ {
+ timer = (OsTimerPtr)xalloc(sizeof(struct _OsTimerRec));
+ if (!timer)
+ return NULL;
+ }
+ else
+ {
+ for (prev = &timers; *prev; prev = &(*prev)->next)
+ {
+ if (*prev == timer)
+ {
+ *prev = timer->next;
+ if (flags & TimerForceOld)
+ (void)(*timer->callback)(timer, now, timer->arg);
+ break;
+ }
+ }
+ }
+ if (!millis)
+ return timer;
+ if (!(flags & TimerAbsolute))
+ millis += now;
+ timer->expires = millis;
+ timer->callback = func;
+ timer->arg = arg;
+ if ((int) (millis - now) <= 0)
+ {
+ timer->next = NULL;
+ millis = (*timer->callback)(timer, now, timer->arg);
+ if (!millis)
+ return timer;
+ }
+ for (prev = &timers;
+ *prev && (int) ((*prev)->expires - millis) <= 0;
+ prev = &(*prev)->next)
+ ;
+ timer->next = *prev;
+ *prev = timer;
+ return timer;
+}
+
+Bool
+TimerForce(OsTimerPtr timer)
+{
+ OsTimerPtr *prev;
+
+ for (prev = &timers; *prev; prev = &(*prev)->next)
+ {
+ if (*prev == timer)
+ {
+ DoTimer(timer, GetTimeInMillis(), prev);
+ return TRUE;
+ }
+ }
+ return FALSE;
+}
+
+
+void
+TimerCancel(OsTimerPtr timer)
+{
+ OsTimerPtr *prev;
+
+ if (!timer)
+ return;
+ for (prev = &timers; *prev; prev = &(*prev)->next)
+ {
+ if (*prev == timer)
+ {
+ *prev = timer->next;
+ break;
+ }
+ }
+}
+
+void
+TimerFree(OsTimerPtr timer)
+{
+ if (!timer)
+ return;
+ TimerCancel(timer);
+ xfree(timer);
+}
+
+void
+TimerCheck(void)
+{
+ CARD32 now = GetTimeInMillis();
+
+ while (timers && (int) (timers->expires - now) <= 0)
+ DoTimer(timers, now, &timers);
+}
+
+void
+TimerInit(void)
+{
+ OsTimerPtr timer;
+
+ while ((timer = timers))
+ {
+ timers = timer->next;
+ xfree(timer);
+ }
+}
+
+static CARD32
+ScreenSaverTimeoutExpire(OsTimerPtr timer,CARD32 now,pointer arg)
+{
+ INT32 timeout = now - lastDeviceEventTime.milliseconds;
+
+ if (timeout < ScreenSaverTime) {
+ return ScreenSaverTime - timeout;
+ }
+
+ ResetOsBuffers(); /* not ideal, but better than nothing */
+ SaveScreens(SCREEN_SAVER_ON, ScreenSaverActive);
+
+#ifdef DPMSExtension
+ if (ScreenSaverInterval > 0 && DPMSPowerLevel == DPMSModeOn)
+#else
+ if (ScreenSaverInterval > 0)
+#endif /* DPMSExtension */
+ return ScreenSaverInterval;
+
+ return 0;
+}
+
+static OsTimerPtr ScreenSaverTimer = NULL;
+
+void
+FreeScreenSaverTimer(void)
+{
+ if (ScreenSaverTimer) {
+ TimerFree(ScreenSaverTimer);
+ ScreenSaverTimer = NULL;
+ }
+}
+
+void
+SetScreenSaverTimer(void)
+{
+ if (ScreenSaverTime > 0) {
+ ScreenSaverTimer = TimerSet(ScreenSaverTimer, 0, ScreenSaverTime,
+ ScreenSaverTimeoutExpire, NULL);
+ } else if (ScreenSaverTimer) {
+ FreeScreenSaverTimer();
+ }
+}
+
+#ifdef DPMSExtension
+
+static OsTimerPtr DPMSStandbyTimer = NULL;
+static OsTimerPtr DPMSSuspendTimer = NULL;
+static OsTimerPtr DPMSOffTimer = NULL;
+
+static CARD32
+DPMSStandbyTimerExpire(OsTimerPtr timer,CARD32 now,pointer arg)
+{
+ INT32 timeout = now - lastDeviceEventTime.milliseconds;
+
+ if (timeout < DPMSStandbyTime) {
+ return DPMSStandbyTime - timeout;
+ }
+ if (DPMSPowerLevel < DPMSModeStandby) {
+ if (DPMSEnabled)
+ DPMSSet(DPMSModeStandby);
+ }
+ return DPMSStandbyTime;
+}
+
+static CARD32
+DPMSSuspendTimerExpire(OsTimerPtr timer,CARD32 now,pointer arg)
+{
+ INT32 timeout = now - lastDeviceEventTime.milliseconds;
+
+ if (timeout < DPMSSuspendTime) {
+ return DPMSSuspendTime - timeout;
+ }
+ if (DPMSPowerLevel < DPMSModeSuspend) {
+ if (DPMSEnabled)
+ DPMSSet(DPMSModeSuspend);
+ }
+ return DPMSSuspendTime;
+}
+
+static CARD32
+DPMSOffTimerExpire(OsTimerPtr timer,CARD32 now,pointer arg)
+{
+ INT32 timeout = now - lastDeviceEventTime.milliseconds;
+
+ if (timeout < DPMSOffTime) {
+ return DPMSOffTime - timeout;
+ }
+ if (DPMSPowerLevel < DPMSModeOff) {
+ if (DPMSEnabled)
+ DPMSSet(DPMSModeOff);
+ }
+ return DPMSOffTime;
+}
+
+void
+FreeDPMSTimers(void)
+{
+ if (DPMSStandbyTimer) {
+ TimerFree(DPMSStandbyTimer);
+ DPMSStandbyTimer = NULL;
+ }
+ if (DPMSSuspendTimer) {
+ TimerFree(DPMSSuspendTimer);
+ DPMSSuspendTimer = NULL;
+ }
+ if (DPMSOffTimer) {
+ TimerFree(DPMSOffTimer);
+ DPMSOffTimer = NULL;
+ }
+}
+
+void
+SetDPMSTimers(void)
+{
+ if (!DPMSEnabled)
+ return;
+
+ DPMSStandbyTimer = TimerSet(DPMSStandbyTimer, 0, DPMSStandbyTime,
+ DPMSStandbyTimerExpire, NULL);
+ DPMSSuspendTimer = TimerSet(DPMSSuspendTimer, 0, DPMSSuspendTime,
+ DPMSSuspendTimerExpire, NULL);
+ DPMSOffTimer = TimerSet(DPMSOffTimer, 0, DPMSOffTime,
+ DPMSOffTimerExpire, NULL);
+}
+#endif