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Diffstat (limited to 'xorg-server/os/WaitFor.c')
| -rw-r--r-- | xorg-server/os/WaitFor.c | 696 |
1 files changed, 696 insertions, 0 deletions
diff --git a/xorg-server/os/WaitFor.c b/xorg-server/os/WaitFor.c new file mode 100644 index 000000000..da12976ca --- /dev/null +++ b/xorg-server/os/WaitFor.c @@ -0,0 +1,696 @@ +/*********************************************************** + +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 + +/* 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 + +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; +#ifdef SMART_SCHEDULE + Bool someReady = FALSE; +#endif + + 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)) + { +#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 > 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; + } + } + XFD_COPYSET(&AllSockets, &LastSelectMask); +#ifdef SMART_SCHEDULE + } + SmartScheduleStopTimer (); + +#endif + 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); +#ifdef SMART_SCHEDULE + SmartScheduleStartTimer (); +#endif + 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)); + } + } +#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 (*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; + } + } +#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); + + 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 = 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 + } + } + 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); +} + +_X_EXPORT 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) { + 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; +} + + +_X_EXPORT void +TimerCancel(OsTimerPtr timer) +{ + OsTimerPtr *prev; + + if (!timer) + return; + for (prev = &timers; *prev; prev = &(*prev)->next) + { + if (*prev == timer) + { + *prev = timer->next; + break; + } + } +} + +_X_EXPORT 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); + } +} + +#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(); + } +} + |