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-rw-r--r--xorg-server/os/WaitFor.c1380
1 files changed, 693 insertions, 687 deletions
diff --git a/xorg-server/os/WaitFor.c b/xorg-server/os/WaitFor.c
index 025f2a2a4..ddfa14903 100644
--- a/xorg-server/os/WaitFor.c
+++ b/xorg-server/os/WaitFor.c
@@ -1,687 +1,693 @@
-/***********************************************************
-
-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.
-
-******************************************************************/
-
-
-/*****************************************************************
- * 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"
-
-#include "osdep.h"
-#include <X11/Xpoll.h>
-#include "dixstruct.h"
-#include "opaque.h"
-#ifdef DPMSExtension
-#include "dpmsproc.h"
-#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
-
-/* like ffs, but uses fd_mask instead of int as argument, so it works
- when fd_mask is longer than an int, such as common 64-bit platforms */
-/* 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
-#include <X11/extensions/dpmsconst.h>
-#endif
-
-struct _OsTimerRec {
- OsTimerPtr next;
- CARD32 expires;
- CARD32 delta;
- OsTimerCallback callback;
- pointer arg;
-};
-
-static void DoTimer(OsTimerPtr timer, CARD32 now, OsTimerPtr *prev);
-static void CheckAllTimers(void);
-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;
- Bool someReady = FALSE;
-
- FD_ZERO(&clientsReadable);
-
- /* 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))
- {
- if (!SmartScheduleDisable)
- {
- someReady = TRUE;
- waittime.tv_sec = 0;
- waittime.tv_usec = 0;
- wt = &waittime;
- }
- else
- {
- XFD_COPYSET (&ClientsWithInput, &clientsReadable);
- break;
- }
- }
- if (someReady)
- {
- XFD_COPYSET(&AllSockets, &LastSelectMask);
- XFD_UNSET(&LastSelectMask, &ClientsWithInput);
- }
- else
- {
- wt = NULL;
- if (timers)
- {
- now = GetTimeInMillis();
- timeout = timers->expires - now;
- if (timeout > 0 && timeout > timers->delta + 250) {
- /* time has rewound. reset the timers. */
- CheckAllTimers();
- }
-
- if (timers) {
- 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;
- }
- }
- if (!wt)
- {
- wt = &waittime;
- waittime.tv_sec = 0;
- waittime.tv_usec = 100;
- }
- XFD_COPYSET(&AllSockets, &LastSelectMask);
- }
- SmartScheduleStopTimer ();
-
- BlockHandler((pointer)&wt, (pointer)&LastSelectMask);
- if (NewOutputPending)
- FlushAllOutput();
- /* keep this check close to select() call to minimize race */
- if (dispatchException)
- i = -1;
- else if (AnyClientsWriteBlocked)
- {
- XFD_COPYSET(&ClientsWriteBlocked, &clientsWritable);
- i = Select (MaxClients, &LastSelectMask, &clientsWritable, NULL, wt);
- }
- else
- {
- i = Select (MaxClients, &LastSelectMask, NULL, NULL, wt);
- }
- selecterr = GetErrno();
- WakeupHandler(i, (pointer)&LastSelectMask);
- SmartScheduleStartTimer ();
- if (i <= 0) /* An error or timeout occurred */
- {
- if (dispatchException)
- return 0;
- if (i < 0)
- {
- if (selecterr == EBADF) /* Some client disconnected */
- {
- CheckConnections ();
- if (! XFD_ANYSET (&AllClients))
- return 0;
- }
- else if (selecterr == EINVAL)
- {
- FatalError("WaitForSomething(): select: %s\n",
- strerror(selecterr));
- }
- else if (selecterr != EINTR && selecterr != EAGAIN)
- {
- ErrorF("WaitForSomething(): select: %s\n",
- strerror(selecterr));
- }
- }
- else if (someReady)
- {
- /*
- * If no-one else is home, bail quickly
- */
- XFD_COPYSET(&ClientsWithInput, &LastSelectMask);
- XFD_COPYSET(&ClientsWithInput, &clientsReadable);
- break;
- }
- if (*checkForInput[0] != *checkForInput[1])
- return 0;
-
- 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;
- }
- }
- if (someReady)
- XFD_ORSET(&LastSelectMask, &ClientsWithInput, &LastSelectMask);
- 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);
-
- if (XFD_ANYSET (&devicesReadable) || XFD_ANYSET (&clientsReadable))
- break;
- /* check here for DDXes that queue events during Block/Wakeup */
- if (*checkForInput[0] != *checkForInput[1])
- return 0;
- }
- }
-
- 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 = mffs (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
- /* 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)
- {
- pClientsReady[nready++] = client_index;
- }
-#ifndef WIN32
- clientsReadable.fds_bits[i] &= ~(((fd_mask)1L) << curclient);
- }
-#else
- FD_CLR(curclient, &clientsReadable);
-#endif
- }
- }
- return nready;
-}
-
-/* If time has rewound, re-run every affected timer.
- * Timers might drop out of the list, so we have to restart every time. */
-static void
-CheckAllTimers(void)
-{
- OsTimerPtr timer;
- CARD32 now;
-
-start:
- now = GetTimeInMillis();
-
- for (timer = timers; timer; timer = timer->next) {
- if (timer->expires - now > timer->delta + 250) {
- TimerForce(timer);
- goto start;
- }
- }
-}
-
-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 = malloc(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) {
- timer->delta = millis - now;
- }
- else {
- timer->delta = millis;
- 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);
- free(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;
- free(timer);
- }
-}
-
-#ifdef DPMSExtension
-
-#define DPMS_CHECK_MODE(mode,time)\
- if (time > 0 && DPMSPowerLevel < mode && timeout >= time)\
- DPMSSet(serverClient, mode);
-
-#define DPMS_CHECK_TIMEOUT(time)\
- if (time > 0 && (time - timeout) > 0)\
- return time - timeout;
-
-static CARD32
-NextDPMSTimeout(INT32 timeout)
-{
- /*
- * Return the amount of time remaining until we should set
- * the next power level. Fallthroughs are intentional.
- */
- switch (DPMSPowerLevel)
- {
- case DPMSModeOn:
- DPMS_CHECK_TIMEOUT(DPMSStandbyTime)
-
- case DPMSModeStandby:
- DPMS_CHECK_TIMEOUT(DPMSSuspendTime)
-
- case DPMSModeSuspend:
- DPMS_CHECK_TIMEOUT(DPMSOffTime)
-
- default: /* DPMSModeOff */
- return 0;
- }
-}
-#endif /* DPMSExtension */
-
-static CARD32
-ScreenSaverTimeoutExpire(OsTimerPtr timer,CARD32 now,pointer arg)
-{
- INT32 timeout = now - lastDeviceEventTime.milliseconds;
- CARD32 nextTimeout = 0;
-
-#ifdef DPMSExtension
- /*
- * Check each mode lowest to highest, since a lower mode can
- * have the same timeout as a higher one.
- */
- if (DPMSEnabled)
- {
- DPMS_CHECK_MODE(DPMSModeOff, DPMSOffTime)
- DPMS_CHECK_MODE(DPMSModeSuspend, DPMSSuspendTime)
- DPMS_CHECK_MODE(DPMSModeStandby, DPMSStandbyTime)
-
- nextTimeout = NextDPMSTimeout(timeout);
- }
-
- /*
- * Only do the screensaver checks if we're not in a DPMS
- * power saving mode
- */
- if (DPMSPowerLevel != DPMSModeOn)
- return nextTimeout;
-#endif /* DPMSExtension */
-
- if (!ScreenSaverTime)
- return nextTimeout;
-
- if (timeout < ScreenSaverTime)
- {
- return nextTimeout > 0 ?
- min(ScreenSaverTime - timeout, nextTimeout) :
- ScreenSaverTime - timeout;
- }
-
- ResetOsBuffers(); /* not ideal, but better than nothing */
- dixSaveScreens(serverClient, SCREEN_SAVER_ON, ScreenSaverActive);
-
- if (ScreenSaverInterval > 0)
- {
- nextTimeout = nextTimeout > 0 ?
- min(ScreenSaverInterval, nextTimeout) :
- ScreenSaverInterval;
- }
-
- return nextTimeout;
-}
-
-static OsTimerPtr ScreenSaverTimer = NULL;
-
-void
-FreeScreenSaverTimer(void)
-{
- if (ScreenSaverTimer) {
- TimerFree(ScreenSaverTimer);
- ScreenSaverTimer = NULL;
- }
-}
-
-void
-SetScreenSaverTimer(void)
-{
- CARD32 timeout = 0;
-
-#ifdef DPMSExtension
- if (DPMSEnabled)
- {
- /*
- * A higher DPMS level has a timeout that's either less
- * than or equal to that of a lower DPMS level.
- */
- if (DPMSStandbyTime > 0)
- timeout = DPMSStandbyTime;
-
- else if (DPMSSuspendTime > 0)
- timeout = DPMSSuspendTime;
-
- else if (DPMSOffTime > 0)
- timeout = DPMSOffTime;
- }
-#endif
-
- if (ScreenSaverTime > 0)
- {
- timeout = timeout > 0 ?
- min(ScreenSaverTime, timeout) :
- ScreenSaverTime;
- }
-
-#ifdef SCREENSAVER
- if (timeout && !screenSaverSuspended) {
-#else
- if (timeout) {
-#endif
- ScreenSaverTimer = TimerSet(ScreenSaverTimer, 0, timeout,
- ScreenSaverTimeoutExpire, NULL);
- }
- else if (ScreenSaverTimer) {
- FreeScreenSaverTimer();
- }
-}
-
+/***********************************************************
+
+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.
+
+******************************************************************/
+
+
+/*****************************************************************
+ * 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"
+
+#include "osdep.h"
+#include <X11/Xpoll.h>
+#include "dixstruct.h"
+#include "opaque.h"
+#ifdef DPMSExtension
+#include "dpmsproc.h"
+#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
+
+/* like ffs, but uses fd_mask instead of int as argument, so it works
+ when fd_mask is longer than an int, such as common 64-bit platforms */
+/* 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
+#include <X11/extensions/dpmsconst.h>
+#endif
+
+struct _OsTimerRec {
+ OsTimerPtr next;
+ CARD32 expires;
+ CARD32 delta;
+ OsTimerCallback callback;
+ pointer arg;
+};
+
+static void DoTimer(OsTimerPtr timer, CARD32 now, OsTimerPtr *prev);
+static void CheckAllTimers(void);
+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;
+ static int nready;
+ fd_set devicesReadable;
+ CARD32 now = 0;
+ Bool someReady = FALSE;
+
+ FD_ZERO(&clientsReadable);
+
+ if (nready)
+ SmartScheduleStopTimer();
+ nready = 0;
+
+ /* 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))
+ {
+ if (!SmartScheduleDisable)
+ {
+ someReady = TRUE;
+ waittime.tv_sec = 0;
+ waittime.tv_usec = 0;
+ wt = &waittime;
+ }
+ else
+ {
+ XFD_COPYSET (&ClientsWithInput, &clientsReadable);
+ break;
+ }
+ }
+ if (someReady)
+ {
+ XFD_COPYSET(&AllSockets, &LastSelectMask);
+ XFD_UNSET(&LastSelectMask, &ClientsWithInput);
+ }
+ else
+ {
+ wt = NULL;
+ if (timers)
+ {
+ now = GetTimeInMillis();
+ timeout = timers->expires - now;
+ if (timeout > 0 && timeout > timers->delta + 250) {
+ /* time has rewound. reset the timers. */
+ CheckAllTimers();
+ }
+
+ if (timers) {
+ 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;
+ }
+ }
+ if (!wt)
+ {
+ wt = &waittime;
+ waittime.tv_sec = 0;
+ waittime.tv_usec = 100;
+ }
+ XFD_COPYSET(&AllSockets, &LastSelectMask);
+ }
+
+ BlockHandler((pointer)&wt, (pointer)&LastSelectMask);
+ if (NewOutputPending)
+ FlushAllOutput();
+ /* keep this check close to select() call to minimize race */
+ if (dispatchException)
+ i = -1;
+ else if (AnyClientsWriteBlocked)
+ {
+ XFD_COPYSET(&ClientsWriteBlocked, &clientsWritable);
+ i = Select (MaxClients, &LastSelectMask, &clientsWritable, NULL, wt);
+ }
+ else
+ {
+ i = Select (MaxClients, &LastSelectMask, NULL, NULL, wt);
+ }
+ selecterr = GetErrno();
+ WakeupHandler(i, (pointer)&LastSelectMask);
+ if (i <= 0) /* An error or timeout occurred */
+ {
+ if (dispatchException)
+ return 0;
+ if (i < 0)
+ {
+ if (selecterr == EBADF) /* Some client disconnected */
+ {
+ CheckConnections ();
+ if (! XFD_ANYSET (&AllClients))
+ return 0;
+ }
+ else if (selecterr == EINVAL)
+ {
+ FatalError("WaitForSomething(): select: %s\n",
+ strerror(selecterr));
+ }
+ else if (selecterr != EINTR && selecterr != EAGAIN)
+ {
+ ErrorF("WaitForSomething(): select: %s\n",
+ strerror(selecterr));
+ }
+ }
+ else if (someReady)
+ {
+ /*
+ * If no-one else is home, bail quickly
+ */
+ XFD_COPYSET(&ClientsWithInput, &LastSelectMask);
+ XFD_COPYSET(&ClientsWithInput, &clientsReadable);
+ break;
+ }
+ if (*checkForInput[0] != *checkForInput[1])
+ return 0;
+
+ 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;
+ }
+ }
+ if (someReady)
+ XFD_ORSET(&LastSelectMask, &ClientsWithInput, &LastSelectMask);
+ 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);
+
+ if (XFD_ANYSET (&devicesReadable) || XFD_ANYSET (&clientsReadable))
+ break;
+ /* check here for DDXes that queue events during Block/Wakeup */
+ if (*checkForInput[0] != *checkForInput[1])
+ return 0;
+ }
+ }
+
+ 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 = mffs (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
+ /* 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)
+ {
+ pClientsReady[nready++] = client_index;
+ }
+#ifndef WIN32
+ clientsReadable.fds_bits[i] &= ~(((fd_mask)1L) << curclient);
+ }
+#else
+ FD_CLR(curclient, &clientsReadable);
+#endif
+ }
+ }
+
+ if (nready)
+ SmartScheduleStartTimer();
+
+ return nready;
+}
+
+/* If time has rewound, re-run every affected timer.
+ * Timers might drop out of the list, so we have to restart every time. */
+static void
+CheckAllTimers(void)
+{
+ OsTimerPtr timer;
+ CARD32 now;
+
+start:
+ now = GetTimeInMillis();
+
+ for (timer = timers; timer; timer = timer->next) {
+ if (timer->expires - now > timer->delta + 250) {
+ TimerForce(timer);
+ goto start;
+ }
+ }
+}
+
+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 = malloc(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) {
+ timer->delta = millis - now;
+ }
+ else {
+ timer->delta = millis;
+ 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);
+ free(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;
+ free(timer);
+ }
+}
+
+#ifdef DPMSExtension
+
+#define DPMS_CHECK_MODE(mode,time)\
+ if (time > 0 && DPMSPowerLevel < mode && timeout >= time)\
+ DPMSSet(serverClient, mode);
+
+#define DPMS_CHECK_TIMEOUT(time)\
+ if (time > 0 && (time - timeout) > 0)\
+ return time - timeout;
+
+static CARD32
+NextDPMSTimeout(INT32 timeout)
+{
+ /*
+ * Return the amount of time remaining until we should set
+ * the next power level. Fallthroughs are intentional.
+ */
+ switch (DPMSPowerLevel)
+ {
+ case DPMSModeOn:
+ DPMS_CHECK_TIMEOUT(DPMSStandbyTime)
+
+ case DPMSModeStandby:
+ DPMS_CHECK_TIMEOUT(DPMSSuspendTime)
+
+ case DPMSModeSuspend:
+ DPMS_CHECK_TIMEOUT(DPMSOffTime)
+
+ default: /* DPMSModeOff */
+ return 0;
+ }
+}
+#endif /* DPMSExtension */
+
+static CARD32
+ScreenSaverTimeoutExpire(OsTimerPtr timer,CARD32 now,pointer arg)
+{
+ INT32 timeout = now - lastDeviceEventTime.milliseconds;
+ CARD32 nextTimeout = 0;
+
+#ifdef DPMSExtension
+ /*
+ * Check each mode lowest to highest, since a lower mode can
+ * have the same timeout as a higher one.
+ */
+ if (DPMSEnabled)
+ {
+ DPMS_CHECK_MODE(DPMSModeOff, DPMSOffTime)
+ DPMS_CHECK_MODE(DPMSModeSuspend, DPMSSuspendTime)
+ DPMS_CHECK_MODE(DPMSModeStandby, DPMSStandbyTime)
+
+ nextTimeout = NextDPMSTimeout(timeout);
+ }
+
+ /*
+ * Only do the screensaver checks if we're not in a DPMS
+ * power saving mode
+ */
+ if (DPMSPowerLevel != DPMSModeOn)
+ return nextTimeout;
+#endif /* DPMSExtension */
+
+ if (!ScreenSaverTime)
+ return nextTimeout;
+
+ if (timeout < ScreenSaverTime)
+ {
+ return nextTimeout > 0 ?
+ min(ScreenSaverTime - timeout, nextTimeout) :
+ ScreenSaverTime - timeout;
+ }
+
+ ResetOsBuffers(); /* not ideal, but better than nothing */
+ dixSaveScreens(serverClient, SCREEN_SAVER_ON, ScreenSaverActive);
+
+ if (ScreenSaverInterval > 0)
+ {
+ nextTimeout = nextTimeout > 0 ?
+ min(ScreenSaverInterval, nextTimeout) :
+ ScreenSaverInterval;
+ }
+
+ return nextTimeout;
+}
+
+static OsTimerPtr ScreenSaverTimer = NULL;
+
+void
+FreeScreenSaverTimer(void)
+{
+ if (ScreenSaverTimer) {
+ TimerFree(ScreenSaverTimer);
+ ScreenSaverTimer = NULL;
+ }
+}
+
+void
+SetScreenSaverTimer(void)
+{
+ CARD32 timeout = 0;
+
+#ifdef DPMSExtension
+ if (DPMSEnabled)
+ {
+ /*
+ * A higher DPMS level has a timeout that's either less
+ * than or equal to that of a lower DPMS level.
+ */
+ if (DPMSStandbyTime > 0)
+ timeout = DPMSStandbyTime;
+
+ else if (DPMSSuspendTime > 0)
+ timeout = DPMSSuspendTime;
+
+ else if (DPMSOffTime > 0)
+ timeout = DPMSOffTime;
+ }
+#endif
+
+ if (ScreenSaverTime > 0)
+ {
+ timeout = timeout > 0 ?
+ min(ScreenSaverTime, timeout) :
+ ScreenSaverTime;
+ }
+
+#ifdef SCREENSAVER
+ if (timeout && !screenSaverSuspended) {
+#else
+ if (timeout) {
+#endif
+ ScreenSaverTimer = TimerSet(ScreenSaverTimer, 0, timeout,
+ ScreenSaverTimeoutExpire, NULL);
+ }
+ else if (ScreenSaverTimer) {
+ FreeScreenSaverTimer();
+ }
+}
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 13:55:02 +0000