diff options
Diffstat (limited to 'xorg-server/Xext/sync.c')
| -rw-r--r-- | xorg-server/Xext/sync.c | 4793 |
1 files changed, 2394 insertions, 2399 deletions
diff --git a/xorg-server/Xext/sync.c b/xorg-server/Xext/sync.c index d46087a68..8eb228bf1 100644 --- a/xorg-server/Xext/sync.c +++ b/xorg-server/Xext/sync.c @@ -1,2399 +1,2394 @@ -/* - -Copyright 1991, 1993, 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 1991, 1993 by Digital Equipment Corporation, Maynard, Massachusetts, -and Olivetti Research Limited, Cambridge, England. - - 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 names of Digital or Olivetti -not be used in advertising or publicity pertaining to distribution of the -software without specific, written prior permission. Digital and Olivetti -make no representations about the suitability of this software -for any purpose. It is provided "as is" without express or implied warranty. - -DIGITAL AND OLIVETTI DISCLAIM ALL WARRANTIES WITH REGARD TO THIS -SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND -FITNESS, IN NO EVENT SHALL THEY 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. - -*/ - -#ifdef HAVE_DIX_CONFIG_H -#include <dix-config.h> -#endif - -#include <string.h> - -#include <X11/X.h> -#include <X11/Xproto.h> -#include <X11/Xmd.h> -#include "misc.h" -#include "os.h" -#include "extnsionst.h" -#include "dixstruct.h" -#include "resource.h" -#include "opaque.h" -#include <X11/extensions/syncproto.h> -#include "syncsrv.h" - -#include <stdio.h> -#if !defined(WIN32) -#include <sys/time.h> -#endif - -#include "modinit.h" - -/* - * Local Global Variables - */ -static int SyncEventBase; -static int SyncErrorBase; -static RESTYPE RTCounter = 0; -static RESTYPE RTAwait; -static RESTYPE RTAlarm; -static RESTYPE RTAlarmClient; -static int SyncNumSystemCounters = 0; -static SyncCounter **SysCounterList = NULL; - -#define IsSystemCounter(pCounter) \ - (pCounter && (pCounter->client == NULL)) - -/* these are all the alarm attributes that pertain to the alarm's trigger */ -#define XSyncCAAllTrigger \ - (XSyncCACounter | XSyncCAValueType | XSyncCAValue | XSyncCATestType) - -static void SyncComputeBracketValues(SyncCounter *); - -static void SyncInitServerTime(void); - -static void SyncInitIdleTime(void); - -static DISPATCH_PROC(ProcSyncAwait); -static DISPATCH_PROC(ProcSyncChangeAlarm); -static DISPATCH_PROC(ProcSyncChangeCounter); -static DISPATCH_PROC(ProcSyncCreateAlarm); -static DISPATCH_PROC(ProcSyncCreateCounter); -static DISPATCH_PROC(ProcSyncDestroyAlarm); -static DISPATCH_PROC(ProcSyncDestroyCounter); -static DISPATCH_PROC(ProcSyncDispatch); -static DISPATCH_PROC(ProcSyncGetPriority); -static DISPATCH_PROC(ProcSyncInitialize); -static DISPATCH_PROC(ProcSyncListSystemCounters); -static DISPATCH_PROC(ProcSyncQueryAlarm); -static DISPATCH_PROC(ProcSyncQueryCounter); -static DISPATCH_PROC(ProcSyncSetCounter); -static DISPATCH_PROC(ProcSyncSetPriority); -static DISPATCH_PROC(SProcSyncAwait); -static DISPATCH_PROC(SProcSyncChangeAlarm); -static DISPATCH_PROC(SProcSyncChangeCounter); -static DISPATCH_PROC(SProcSyncCreateAlarm); -static DISPATCH_PROC(SProcSyncCreateCounter); -static DISPATCH_PROC(SProcSyncDestroyAlarm); -static DISPATCH_PROC(SProcSyncDestroyCounter); -static DISPATCH_PROC(SProcSyncDispatch); -static DISPATCH_PROC(SProcSyncGetPriority); -static DISPATCH_PROC(SProcSyncInitialize); -static DISPATCH_PROC(SProcSyncListSystemCounters); -static DISPATCH_PROC(SProcSyncQueryAlarm); -static DISPATCH_PROC(SProcSyncQueryCounter); -static DISPATCH_PROC(SProcSyncSetCounter); -static DISPATCH_PROC(SProcSyncSetPriority); - -/* Each counter maintains a simple linked list of triggers that are - * interested in the counter. The two functions below are used to - * delete and add triggers on this list. - */ -static void -SyncDeleteTriggerFromCounter(SyncTrigger *pTrigger) -{ - SyncTriggerList *pCur; - SyncTriggerList *pPrev; - - /* pCounter needs to be stored in pTrigger before calling here. */ - - if (!pTrigger->pCounter) - return; - - pPrev = NULL; - pCur = pTrigger->pCounter->pTriglist; - - while (pCur) - { - if (pCur->pTrigger == pTrigger) - { - if (pPrev) - pPrev->next = pCur->next; - else - pTrigger->pCounter->pTriglist = pCur->next; - - free(pCur); - break; - } - - pPrev = pCur; - pCur = pCur->next; - } - - if (IsSystemCounter(pTrigger->pCounter)) - SyncComputeBracketValues(pTrigger->pCounter); -} - - -static int -SyncAddTriggerToCounter(SyncTrigger *pTrigger) -{ - SyncTriggerList *pCur; - - if (!pTrigger->pCounter) - return Success; - - /* don't do anything if it's already there */ - for (pCur = pTrigger->pCounter->pTriglist; pCur; pCur = pCur->next) - { - if (pCur->pTrigger == pTrigger) - return Success; - } - - if (!(pCur = malloc(sizeof(SyncTriggerList)))) - return BadAlloc; - - pCur->pTrigger = pTrigger; - pCur->next = pTrigger->pCounter->pTriglist; - pTrigger->pCounter->pTriglist = pCur; - - if (IsSystemCounter(pTrigger->pCounter)) - SyncComputeBracketValues(pTrigger->pCounter); - - return Success; -} - - -/* Below are four possible functions that can be plugged into - * pTrigger->CheckTrigger, corresponding to the four possible - * test-types. These functions are called after the counter's - * value changes but are also passed the old counter value - * so they can inspect both the old and new values. - * (PositiveTransition and NegativeTransition need to see both - * pieces of information.) These functions return the truth value - * of the trigger. - * - * All of them include the condition pTrigger->pCounter == NULL. - * This is because the spec says that a trigger with a counter value - * of None is always TRUE. - */ - -static Bool -SyncCheckTriggerPositiveComparison(SyncTrigger *pTrigger, CARD64 oldval) -{ - return (pTrigger->pCounter == NULL || - XSyncValueGreaterOrEqual(pTrigger->pCounter->value, - pTrigger->test_value)); -} - -static Bool -SyncCheckTriggerNegativeComparison(SyncTrigger *pTrigger, CARD64 oldval) -{ - return (pTrigger->pCounter == NULL || - XSyncValueLessOrEqual(pTrigger->pCounter->value, - pTrigger->test_value)); -} - -static Bool -SyncCheckTriggerPositiveTransition(SyncTrigger *pTrigger, CARD64 oldval) -{ - return (pTrigger->pCounter == NULL || - (XSyncValueLessThan(oldval, pTrigger->test_value) && - XSyncValueGreaterOrEqual(pTrigger->pCounter->value, - pTrigger->test_value))); -} - -static Bool -SyncCheckTriggerNegativeTransition(SyncTrigger *pTrigger, CARD64 oldval) -{ - return (pTrigger->pCounter == NULL || - (XSyncValueGreaterThan(oldval, pTrigger->test_value) && - XSyncValueLessOrEqual(pTrigger->pCounter->value, - pTrigger->test_value))); -} - -static int -SyncInitTrigger(ClientPtr client, SyncTrigger *pTrigger, XSyncCounter counter, - Mask changes) -{ - SyncCounter *pCounter = pTrigger->pCounter; - int rc; - Bool newcounter = FALSE; - - if (changes & XSyncCACounter) - { - if (counter == None) - pCounter = NULL; - else if (Success != (rc = dixLookupResourceByType ((pointer *)&pCounter, - counter, RTCounter, client, DixReadAccess))) - { - client->errorValue = counter; - return (rc == BadValue) ? SyncErrorBase + XSyncBadCounter : rc; - } - if (pCounter != pTrigger->pCounter) - { /* new counter for trigger */ - SyncDeleteTriggerFromCounter(pTrigger); - pTrigger->pCounter = pCounter; - newcounter = TRUE; - } - } - - /* if system counter, ask it what the current value is */ - - if (IsSystemCounter(pCounter)) - { - (*pCounter->pSysCounterInfo->QueryValue) ((pointer) pCounter, - &pCounter->value); - } - - if (changes & XSyncCAValueType) - { - if (pTrigger->value_type != XSyncRelative && - pTrigger->value_type != XSyncAbsolute) - { - client->errorValue = pTrigger->value_type; - return BadValue; - } - } - - if (changes & XSyncCATestType) - { - if (pTrigger->test_type != XSyncPositiveTransition && - pTrigger->test_type != XSyncNegativeTransition && - pTrigger->test_type != XSyncPositiveComparison && - pTrigger->test_type != XSyncNegativeComparison) - { - client->errorValue = pTrigger->test_type; - return BadValue; - } - /* select appropriate CheckTrigger function */ - - switch (pTrigger->test_type) - { - case XSyncPositiveTransition: - pTrigger->CheckTrigger = SyncCheckTriggerPositiveTransition; - break; - case XSyncNegativeTransition: - pTrigger->CheckTrigger = SyncCheckTriggerNegativeTransition; - break; - case XSyncPositiveComparison: - pTrigger->CheckTrigger = SyncCheckTriggerPositiveComparison; - break; - case XSyncNegativeComparison: - pTrigger->CheckTrigger = SyncCheckTriggerNegativeComparison; - break; - } - } - - if (changes & (XSyncCAValueType | XSyncCAValue)) - { - if (pTrigger->value_type == XSyncAbsolute) - pTrigger->test_value = pTrigger->wait_value; - else /* relative */ - { - Bool overflow; - if (pCounter == NULL) - return BadMatch; - - XSyncValueAdd(&pTrigger->test_value, pCounter->value, - pTrigger->wait_value, &overflow); - if (overflow) - { - client->errorValue = XSyncValueHigh32(pTrigger->wait_value); - return BadValue; - } - } - } - - /* we wait until we're sure there are no errors before registering - * a new counter on a trigger - */ - if (newcounter) - { - if ((rc = SyncAddTriggerToCounter(pTrigger)) != Success) - return rc; - } - else if (IsSystemCounter(pCounter)) - { - SyncComputeBracketValues(pCounter); - } - - return Success; -} - -/* AlarmNotify events happen in response to actions taken on an Alarm or - * the counter used by the alarm. AlarmNotify may be sent to multiple - * clients. The alarm maintains a list of clients interested in events. - */ -static void -SyncSendAlarmNotifyEvents(SyncAlarm *pAlarm) -{ - SyncAlarmClientList *pcl; - xSyncAlarmNotifyEvent ane; - SyncTrigger *pTrigger = &pAlarm->trigger; - - UpdateCurrentTime(); - - ane.type = SyncEventBase + XSyncAlarmNotify; - ane.kind = XSyncAlarmNotify; - ane.sequenceNumber = pAlarm->client->sequence; - ane.alarm = pAlarm->alarm_id; - if (pTrigger->pCounter) - { - ane.counter_value_hi = XSyncValueHigh32(pTrigger->pCounter->value); - ane.counter_value_lo = XSyncValueLow32(pTrigger->pCounter->value); - } - else - { /* XXX what else can we do if there's no counter? */ - ane.counter_value_hi = ane.counter_value_lo = 0; - } - - ane.alarm_value_hi = XSyncValueHigh32(pTrigger->test_value); - ane.alarm_value_lo = XSyncValueLow32(pTrigger->test_value); - ane.time = currentTime.milliseconds; - ane.state = pAlarm->state; - - /* send to owner */ - if (pAlarm->events && !pAlarm->client->clientGone) - WriteEventsToClient(pAlarm->client, 1, (xEvent *) &ane); - - /* send to other interested clients */ - for (pcl = pAlarm->pEventClients; pcl; pcl = pcl->next) - { - if (!pcl->client->clientGone) - { - ane.sequenceNumber = pcl->client->sequence; - WriteEventsToClient(pcl->client, 1, (xEvent *) &ane); - } - } -} - - -/* CounterNotify events only occur in response to an Await. The events - * go only to the Awaiting client. - */ -static void -SyncSendCounterNotifyEvents(ClientPtr client, SyncAwait **ppAwait, - int num_events) -{ - xSyncCounterNotifyEvent *pEvents, *pev; - int i; - - if (client->clientGone) - return; - pev = pEvents = malloc(num_events * sizeof(xSyncCounterNotifyEvent)); - if (!pEvents) - return; - UpdateCurrentTime(); - for (i = 0; i < num_events; i++, ppAwait++, pev++) - { - SyncTrigger *pTrigger = &(*ppAwait)->trigger; - pev->type = SyncEventBase + XSyncCounterNotify; - pev->kind = XSyncCounterNotify; - pev->sequenceNumber = client->sequence; - pev->counter = pTrigger->pCounter->id; - pev->wait_value_lo = XSyncValueLow32(pTrigger->test_value); - pev->wait_value_hi = XSyncValueHigh32(pTrigger->test_value); - pev->counter_value_lo = XSyncValueLow32(pTrigger->pCounter->value); - pev->counter_value_hi = XSyncValueHigh32(pTrigger->pCounter->value); - pev->time = currentTime.milliseconds; - pev->count = num_events - i - 1; /* events remaining */ - pev->destroyed = pTrigger->pCounter->beingDestroyed; - } - /* swapping will be taken care of by this */ - WriteEventsToClient(client, num_events, (xEvent *)pEvents); - free(pEvents); -} - - -/* This function is called when an alarm's counter is destroyed. - * It is plugged into pTrigger->CounterDestroyed (for alarm triggers). - */ -static void -SyncAlarmCounterDestroyed(SyncTrigger *pTrigger) -{ - SyncAlarm *pAlarm = (SyncAlarm *)pTrigger; - - pAlarm->state = XSyncAlarmInactive; - SyncSendAlarmNotifyEvents(pAlarm); - pTrigger->pCounter = NULL; -} - - -/* This function is called when an alarm "goes off." - * It is plugged into pTrigger->TriggerFired (for alarm triggers). - */ -static void -SyncAlarmTriggerFired(SyncTrigger *pTrigger) -{ - SyncAlarm *pAlarm = (SyncAlarm *)pTrigger; - CARD64 new_test_value; - - /* no need to check alarm unless it's active */ - if (pAlarm->state != XSyncAlarmActive) - return; - - /* " if the counter value is None, or if the delta is 0 and - * the test-type is PositiveComparison or NegativeComparison, - * no change is made to value (test-value) and the alarm - * state is changed to Inactive before the event is generated." - */ - if (pAlarm->trigger.pCounter == NULL - || (XSyncValueIsZero(pAlarm->delta) - && (pAlarm->trigger.test_type == XSyncPositiveComparison - || pAlarm->trigger.test_type == XSyncNegativeComparison))) - pAlarm->state = XSyncAlarmInactive; - - new_test_value = pAlarm->trigger.test_value; - - if (pAlarm->state == XSyncAlarmActive) - { - Bool overflow; - CARD64 oldvalue; - SyncTrigger *paTrigger = &pAlarm->trigger; - - /* "The alarm is updated by repeatedly adding delta to the - * value of the trigger and re-initializing it until it - * becomes FALSE." - */ - oldvalue = paTrigger->test_value; - - /* XXX really should do something smarter here */ - - do - { - XSyncValueAdd(&paTrigger->test_value, paTrigger->test_value, - pAlarm->delta, &overflow); - } while (!overflow && - (*paTrigger->CheckTrigger)(paTrigger, - paTrigger->pCounter->value)); - - new_test_value = paTrigger->test_value; - paTrigger->test_value = oldvalue; - - /* "If this update would cause value to fall outside the range - * for an INT64...no change is made to value (test-value) and - * the alarm state is changed to Inactive before the event is - * generated." - */ - if (overflow) - { - new_test_value = oldvalue; - pAlarm->state = XSyncAlarmInactive; - } - } - /* The AlarmNotify event has to have the "new state of the alarm" - * which we can't be sure of until this point. However, it has - * to have the "old" trigger test value. That's the reason for - * all the newvalue/oldvalue shuffling above. After we send the - * events, give the trigger its new test value. - */ - SyncSendAlarmNotifyEvents(pAlarm); - pTrigger->test_value = new_test_value; -} - - -/* This function is called when an Await unblocks, either as a result - * of the trigger firing OR the counter being destroyed. - * It goes into pTrigger->TriggerFired AND pTrigger->CounterDestroyed - * (for Await triggers). - */ -static void -SyncAwaitTriggerFired(SyncTrigger *pTrigger) -{ - SyncAwait *pAwait = (SyncAwait *)pTrigger; - int numwaits; - SyncAwaitUnion *pAwaitUnion; - SyncAwait **ppAwait; - int num_events = 0; - - pAwaitUnion = (SyncAwaitUnion *)pAwait->pHeader; - numwaits = pAwaitUnion->header.num_waitconditions; - ppAwait = malloc(numwaits * sizeof(SyncAwait *)); - if (!ppAwait) - goto bail; - - pAwait = &(pAwaitUnion+1)->await; - - /* "When a client is unblocked, all the CounterNotify events for - * the Await request are generated contiguously. If count is 0 - * there are no more events to follow for this request. If - * count is n, there are at least n more events to follow." - * - * Thus, it is best to find all the counters for which events - * need to be sent first, so that an accurate count field can - * be stored in the events. - */ - for ( ; numwaits; numwaits--, pAwait++) - { - CARD64 diff; - Bool overflow, diffgreater, diffequal; - - /* "A CounterNotify event with the destroyed flag set to TRUE is - * always generated if the counter for one of the triggers is - * destroyed." - */ - if (pAwait->trigger.pCounter->beingDestroyed) - { - ppAwait[num_events++] = pAwait; - continue; - } - - /* "The difference between the counter and the test value is - * calculated by subtracting the test value from the value of - * the counter." - */ - XSyncValueSubtract(&diff, pAwait->trigger.pCounter->value, - pAwait->trigger.test_value, &overflow); - - /* "If the difference lies outside the range for an INT64, an - * event is not generated." - */ - if (overflow) - continue; - diffgreater = XSyncValueGreaterThan(diff, pAwait->event_threshold); - diffequal = XSyncValueEqual(diff, pAwait->event_threshold); - - /* "If the test-type is PositiveTransition or - * PositiveComparison, a CounterNotify event is generated if - * the difference is at least event-threshold. If the test-type - * is NegativeTransition or NegativeComparison, a CounterNotify - * event is generated if the difference is at most - * event-threshold." - */ - - if ( ((pAwait->trigger.test_type == XSyncPositiveComparison || - pAwait->trigger.test_type == XSyncPositiveTransition) - && (diffgreater || diffequal)) - || - ((pAwait->trigger.test_type == XSyncNegativeComparison || - pAwait->trigger.test_type == XSyncNegativeTransition) - && (!diffgreater) /* less or equal */ - ) - ) - { - ppAwait[num_events++] = pAwait; - } - } - if (num_events) - SyncSendCounterNotifyEvents(pAwaitUnion->header.client, ppAwait, - num_events); - free(ppAwait); - -bail: - /* unblock the client */ - AttendClient(pAwaitUnion->header.client); - /* delete the await */ - FreeResource(pAwaitUnion->header.delete_id, RT_NONE); -} - - -/* This function should always be used to change a counter's value so that - * any triggers depending on the counter will be checked. - */ -void -SyncChangeCounter(SyncCounter *pCounter, CARD64 newval) -{ - SyncTriggerList *ptl, *pnext; - CARD64 oldval; - - oldval = pCounter->value; - pCounter->value = newval; - - /* run through triggers to see if any become true */ - for (ptl = pCounter->pTriglist; ptl; ptl = pnext) - { - pnext = ptl->next; - if ((*ptl->pTrigger->CheckTrigger)(ptl->pTrigger, oldval)) - (*ptl->pTrigger->TriggerFired)(ptl->pTrigger); - } - - if (IsSystemCounter(pCounter)) - { - SyncComputeBracketValues(pCounter); - } -} - - -/* loosely based on dix/events.c/EventSelectForWindow */ -static Bool -SyncEventSelectForAlarm(SyncAlarm *pAlarm, ClientPtr client, Bool wantevents) -{ - SyncAlarmClientList *pClients; - - if (client == pAlarm->client) /* alarm owner */ - { - pAlarm->events = wantevents; - return Success; - } - - /* see if the client is already on the list (has events selected) */ - - for (pClients = pAlarm->pEventClients; pClients; - pClients = pClients->next) - { - if (pClients->client == client) - { - /* client's presence on the list indicates desire for - * events. If the client doesn't want events, remove it - * from the list. If the client does want events, do - * nothing, since it's already got them. - */ - if (!wantevents) - { - FreeResource(pClients->delete_id, RT_NONE); - } - return Success; - } - } - - /* if we get here, this client does not currently have - * events selected on the alarm - */ - - if (!wantevents) - /* client doesn't want events, and we just discovered that it - * doesn't have them, so there's nothing to do. - */ - return Success; - - /* add new client to pAlarm->pEventClients */ - - pClients = malloc(sizeof(SyncAlarmClientList)); - if (!pClients) - return BadAlloc; - - /* register it as a resource so it will be cleaned up - * if the client dies - */ - - pClients->delete_id = FakeClientID(client->index); - if (!AddResource(pClients->delete_id, RTAlarmClient, pAlarm)) - { - free(pClients); - return BadAlloc; - } - - /* link it into list after we know all the allocations succeed */ - - pClients->next = pAlarm->pEventClients; - pAlarm->pEventClients = pClients; - pClients->client = client; - return Success; -} - -/* - * ** SyncChangeAlarmAttributes ** This is used by CreateAlarm and ChangeAlarm - */ -static int -SyncChangeAlarmAttributes(ClientPtr client, SyncAlarm *pAlarm, Mask mask, - CARD32 *values) -{ - int status; - XSyncCounter counter; - Mask origmask = mask; - - counter = pAlarm->trigger.pCounter ? pAlarm->trigger.pCounter->id : None; - - while (mask) - { - int index2 = lowbit(mask); - mask &= ~index2; - switch (index2) - { - case XSyncCACounter: - mask &= ~XSyncCACounter; - /* sanity check in SyncInitTrigger */ - counter = *values++; - break; - - case XSyncCAValueType: - mask &= ~XSyncCAValueType; - /* sanity check in SyncInitTrigger */ - pAlarm->trigger.value_type = *values++; - break; - - case XSyncCAValue: - mask &= ~XSyncCAValue; - XSyncIntsToValue(&pAlarm->trigger.wait_value, values[1], values[0]); - values += 2; - break; - - case XSyncCATestType: - mask &= ~XSyncCATestType; - /* sanity check in SyncInitTrigger */ - pAlarm->trigger.test_type = *values++; - break; - - case XSyncCADelta: - mask &= ~XSyncCADelta; - XSyncIntsToValue(&pAlarm->delta, values[1], values[0]); - values += 2; - break; - - case XSyncCAEvents: - mask &= ~XSyncCAEvents; - if ((*values != xTrue) && (*values != xFalse)) - { - client->errorValue = *values; - return BadValue; - } - status = SyncEventSelectForAlarm(pAlarm, client, - (Bool)(*values++)); - if (status != Success) - return status; - break; - - default: - client->errorValue = mask; - return BadValue; - } - } - - /* "If the test-type is PositiveComparison or PositiveTransition - * and delta is less than zero, or if the test-type is - * NegativeComparison or NegativeTransition and delta is - * greater than zero, a Match error is generated." - */ - if (origmask & (XSyncCADelta|XSyncCATestType)) - { - CARD64 zero; - XSyncIntToValue(&zero, 0); - if ((((pAlarm->trigger.test_type == XSyncPositiveComparison) || - (pAlarm->trigger.test_type == XSyncPositiveTransition)) - && XSyncValueLessThan(pAlarm->delta, zero)) - || - (((pAlarm->trigger.test_type == XSyncNegativeComparison) || - (pAlarm->trigger.test_type == XSyncNegativeTransition)) - && XSyncValueGreaterThan(pAlarm->delta, zero)) - ) - { - return BadMatch; - } - } - - /* postpone this until now, when we're sure nothing else can go wrong */ - if ((status = SyncInitTrigger(client, &pAlarm->trigger, counter, - origmask & XSyncCAAllTrigger)) != Success) - return status; - - /* XXX spec does not really say to do this - needs clarification */ - pAlarm->state = XSyncAlarmActive; - return Success; -} - - -static SyncCounter * -SyncCreateCounter(ClientPtr client, XSyncCounter id, CARD64 initialvalue) -{ - SyncCounter *pCounter; - - if (!(pCounter = malloc(sizeof(SyncCounter)))) - return NULL; - - if (!AddResource(id, RTCounter, (pointer) pCounter)) - { - free(pCounter); - return NULL; - } - - pCounter->client = client; - pCounter->id = id; - pCounter->value = initialvalue; - pCounter->pTriglist = NULL; - pCounter->beingDestroyed = FALSE; - pCounter->pSysCounterInfo = NULL; - return pCounter; -} - -static int FreeCounter(void *, XID); - -/* - * ***** System Counter utilities - */ - -pointer -SyncCreateSystemCounter( - char *name, - CARD64 initial, - CARD64 resolution, - SyncCounterType counterType, - void (*QueryValue)(pointer /* pCounter */, - CARD64 * /* pValue_return */), - void (*BracketValues)(pointer /* pCounter */, - CARD64 * /* pbracket_less */, - CARD64 * /* pbracket_greater */) - ) -{ - SyncCounter *pCounter; - - SysCounterList = realloc(SysCounterList, - (SyncNumSystemCounters+1)*sizeof(SyncCounter *)); - if (!SysCounterList) - return NULL; - - /* this function may be called before SYNC has been initialized, so we - * have to make sure RTCounter is created. - */ - if (RTCounter == 0) - { - RTCounter = CreateNewResourceType(FreeCounter, "SyncCounter"); - if (RTCounter == 0) - { - return NULL; - } - } - - pCounter = SyncCreateCounter(NULL, FakeClientID(0), initial); - - if (pCounter) - { - SysCounterInfo *psci; - - psci = malloc(sizeof(SysCounterInfo)); - if (!psci) - { - FreeResource(pCounter->id, RT_NONE); - return pCounter; - } - pCounter->pSysCounterInfo = psci; - psci->name = name; - psci->resolution = resolution; - psci->counterType = counterType; - psci->QueryValue = QueryValue; - psci->BracketValues = BracketValues; - XSyncMaxValue(&psci->bracket_greater); - XSyncMinValue(&psci->bracket_less); - SysCounterList[SyncNumSystemCounters++] = pCounter; - } - return pCounter; -} - -void -SyncDestroySystemCounter(pointer pSysCounter) -{ - SyncCounter *pCounter = (SyncCounter *)pSysCounter; - FreeResource(pCounter->id, RT_NONE); -} - -static void -SyncComputeBracketValues(SyncCounter *pCounter) -{ - SyncTriggerList *pCur; - SyncTrigger *pTrigger; - SysCounterInfo *psci; - CARD64 *pnewgtval = NULL; - CARD64 *pnewltval = NULL; - SyncCounterType ct; - - if (!pCounter) - return; - - psci = pCounter->pSysCounterInfo; - ct = pCounter->pSysCounterInfo->counterType; - if (ct == XSyncCounterNeverChanges) - return; - - XSyncMaxValue(&psci->bracket_greater); - XSyncMinValue(&psci->bracket_less); - - for (pCur = pCounter->pTriglist; pCur; pCur = pCur->next) - { - pTrigger = pCur->pTrigger; - - if (pTrigger->test_type == XSyncPositiveComparison && - ct != XSyncCounterNeverIncreases) - { - if (XSyncValueLessThan(pCounter->value, pTrigger->test_value) && - XSyncValueLessThan(pTrigger->test_value, - psci->bracket_greater)) - { - psci->bracket_greater = pTrigger->test_value; - pnewgtval = &psci->bracket_greater; - } - } - else if (pTrigger->test_type == XSyncNegativeComparison && - ct != XSyncCounterNeverDecreases) - { - if (XSyncValueGreaterThan(pCounter->value, pTrigger->test_value) && - XSyncValueGreaterThan(pTrigger->test_value, - psci->bracket_less)) - { - psci->bracket_less = pTrigger->test_value; - pnewltval = &psci->bracket_less; - } - } - else if (pTrigger->test_type == XSyncNegativeTransition && - ct != XSyncCounterNeverIncreases) - { - if (XSyncValueGreaterThan(pCounter->value, pTrigger->test_value) && - XSyncValueGreaterThan(pTrigger->test_value, psci->bracket_less)) - { - psci->bracket_less = pTrigger->test_value; - pnewltval = &psci->bracket_less; - } - } - else if (pTrigger->test_type == XSyncPositiveTransition && - ct != XSyncCounterNeverDecreases) - { - if (XSyncValueLessThan(pCounter->value, pTrigger->test_value) && - XSyncValueLessThan(pTrigger->test_value, psci->bracket_greater)) - { - psci->bracket_greater = pTrigger->test_value; - pnewgtval = &psci->bracket_greater; - } - } - } /* end for each trigger */ - - if (pnewgtval || pnewltval) - { - (*psci->BracketValues)((pointer)pCounter, pnewltval, pnewgtval); - } -} - -/* - * ***** Resource delete functions - */ - -/* ARGSUSED */ -static int -FreeAlarm(void *addr, XID id) -{ - SyncAlarm *pAlarm = (SyncAlarm *) addr; - - pAlarm->state = XSyncAlarmDestroyed; - - SyncSendAlarmNotifyEvents(pAlarm); - - /* delete event selections */ - - while (pAlarm->pEventClients) - FreeResource(pAlarm->pEventClients->delete_id, RT_NONE); - - SyncDeleteTriggerFromCounter(&pAlarm->trigger); - - free(pAlarm); - return Success; -} - - -/* - * ** Cleanup after the destruction of a Counter - */ -/* ARGSUSED */ -static int -FreeCounter(void *env, XID id) -{ - SyncCounter *pCounter = (SyncCounter *) env; - SyncTriggerList *ptl, *pnext; - - pCounter->beingDestroyed = TRUE; - /* tell all the counter's triggers that the counter has been destroyed */ - for (ptl = pCounter->pTriglist; ptl; ptl = pnext) - { - (*ptl->pTrigger->CounterDestroyed)(ptl->pTrigger); - pnext = ptl->next; - free(ptl); /* destroy the trigger list as we go */ - } - if (IsSystemCounter(pCounter)) - { - int i, found = 0; - - free(pCounter->pSysCounterInfo); - - /* find the counter in the list of system counters and remove it */ - - if (SysCounterList) - { - for (i = 0; i < SyncNumSystemCounters; i++) - { - if (SysCounterList[i] == pCounter) - { - found = i; - break; - } - } - if (found < (SyncNumSystemCounters-1)) - { - for (i = found; i < SyncNumSystemCounters-1; i++) - { - SysCounterList[i] = SysCounterList[i+1]; - } - } - } - SyncNumSystemCounters--; - } - free(pCounter); - return Success; -} - -/* - * ** Cleanup after Await - */ -/* ARGSUSED */ -static int -FreeAwait(void *addr, XID id) -{ - SyncAwaitUnion *pAwaitUnion = (SyncAwaitUnion *) addr; - SyncAwait *pAwait; - int numwaits; - - pAwait = &(pAwaitUnion+1)->await; /* first await on list */ - - /* remove triggers from counters */ - - for (numwaits = pAwaitUnion->header.num_waitconditions; numwaits; - numwaits--, pAwait++) - { - /* If the counter is being destroyed, FreeCounter will delete - * the trigger list itself, so don't do it here. - */ - SyncCounter *pCounter = pAwait->trigger.pCounter; - if (pCounter && !pCounter->beingDestroyed) - SyncDeleteTriggerFromCounter(&pAwait->trigger); - } - free(pAwaitUnion); - return Success; -} - -/* loosely based on dix/events.c/OtherClientGone */ -static int -FreeAlarmClient(void *value, XID id) -{ - SyncAlarm *pAlarm = (SyncAlarm *)value; - SyncAlarmClientList *pCur, *pPrev; - - for (pPrev = NULL, pCur = pAlarm->pEventClients; - pCur; - pPrev = pCur, pCur = pCur->next) - { - if (pCur->delete_id == id) - { - if (pPrev) - pPrev->next = pCur->next; - else - pAlarm->pEventClients = pCur->next; - free(pCur); - return Success; - } - } - FatalError("alarm client not on event list"); - /*NOTREACHED*/ -} - - -/* - * ***** Proc functions - */ - - -/* - * ** Initialize the extension - */ -static int -ProcSyncInitialize(ClientPtr client) -{ - xSyncInitializeReply rep; - int n; - - REQUEST_SIZE_MATCH(xSyncInitializeReq); - - memset(&rep, 0, sizeof(xSyncInitializeReply)); - rep.type = X_Reply; - rep.sequenceNumber = client->sequence; - rep.majorVersion = SYNC_MAJOR_VERSION; - rep.minorVersion = SYNC_MINOR_VERSION; - rep.length = 0; - - if (client->swapped) - { - swaps(&rep.sequenceNumber, n); - } - WriteToClient(client, sizeof(rep), (char *) &rep); - return Success; -} - -/* - * ** Get list of system counters available through the extension - */ -static int -ProcSyncListSystemCounters(ClientPtr client) -{ - xSyncListSystemCountersReply rep; - int i, len; - xSyncSystemCounter *list = NULL, *walklist = NULL; - - REQUEST_SIZE_MATCH(xSyncListSystemCountersReq); - - rep.type = X_Reply; - rep.sequenceNumber = client->sequence; - rep.nCounters = SyncNumSystemCounters; - - for (i = len = 0; i < SyncNumSystemCounters; i++) - { - char *name = SysCounterList[i]->pSysCounterInfo->name; - /* pad to 4 byte boundary */ - len += pad_to_int32(sz_xSyncSystemCounter + strlen(name)); - } - - if (len) - { - walklist = list = malloc(len); - if (!list) - return BadAlloc; - } - - rep.length = bytes_to_int32(len); - - if (client->swapped) - { - char n; - swaps(&rep.sequenceNumber, n); - swapl(&rep.length, n); - swapl(&rep.nCounters, n); - } - - for (i = 0; i < SyncNumSystemCounters; i++) - { - int namelen; - char *pname_in_reply; - SysCounterInfo *psci = SysCounterList[i]->pSysCounterInfo; - - walklist->counter = SysCounterList[i]->id; - walklist->resolution_hi = XSyncValueHigh32(psci->resolution); - walklist->resolution_lo = XSyncValueLow32(psci->resolution); - namelen = strlen(psci->name); - walklist->name_length = namelen; - - if (client->swapped) - { - char n; - swapl(&walklist->counter, n); - swapl(&walklist->resolution_hi, n); - swapl(&walklist->resolution_lo, n); - swaps(&walklist->name_length, n); - } - - pname_in_reply = ((char *)walklist) + sz_xSyncSystemCounter; - strncpy(pname_in_reply, psci->name, namelen); - walklist = (xSyncSystemCounter *) (((char *)walklist) + - pad_to_int32(sz_xSyncSystemCounter + namelen)); - } - - WriteToClient(client, sizeof(rep), (char *) &rep); - if (len) - { - WriteToClient(client, len, (char *) list); - free(list); - } - - return Success; -} - -/* - * ** Set client Priority - */ -static int -ProcSyncSetPriority(ClientPtr client) -{ - REQUEST(xSyncSetPriorityReq); - ClientPtr priorityclient; - int rc; - - REQUEST_SIZE_MATCH(xSyncSetPriorityReq); - - if (stuff->id == None) - priorityclient = client; - else { - rc = dixLookupClient(&priorityclient, stuff->id, client, - DixSetAttrAccess); - if (rc != Success) - return rc; - } - - if (priorityclient->priority != stuff->priority) - { - priorityclient->priority = stuff->priority; - - /* The following will force the server back into WaitForSomething - * so that the change in this client's priority is immediately - * reflected. - */ - isItTimeToYield = TRUE; - dispatchException |= DE_PRIORITYCHANGE; - } - return Success; -} - -/* - * ** Get client Priority - */ -static int -ProcSyncGetPriority(ClientPtr client) -{ - REQUEST(xSyncGetPriorityReq); - xSyncGetPriorityReply rep; - ClientPtr priorityclient; - int rc; - - REQUEST_SIZE_MATCH(xSyncGetPriorityReq); - - if (stuff->id == None) - priorityclient = client; - else { - rc = dixLookupClient(&priorityclient, stuff->id, client, - DixGetAttrAccess); - if (rc != Success) - return rc; - } - - rep.type = X_Reply; - rep.length = 0; - rep.sequenceNumber = client->sequence; - rep.priority = priorityclient->priority; - - if (client->swapped) - { - char n; - swaps(&rep.sequenceNumber, n); - swapl(&rep.priority, n); - } - - WriteToClient(client, sizeof(xSyncGetPriorityReply), (char *) &rep); - - return Success; -} - -/* - * ** Create a new counter - */ -static int -ProcSyncCreateCounter(ClientPtr client) -{ - REQUEST(xSyncCreateCounterReq); - CARD64 initial; - - REQUEST_SIZE_MATCH(xSyncCreateCounterReq); - - LEGAL_NEW_RESOURCE(stuff->cid, client); - - XSyncIntsToValue(&initial, stuff->initial_value_lo, stuff->initial_value_hi); - if (!SyncCreateCounter(client, stuff->cid, initial)) - return BadAlloc; - - return Success; -} - -/* - * ** Set Counter value - */ -static int -ProcSyncSetCounter(ClientPtr client) -{ - REQUEST(xSyncSetCounterReq); - SyncCounter *pCounter; - CARD64 newvalue; - int rc; - - REQUEST_SIZE_MATCH(xSyncSetCounterReq); - - rc = dixLookupResourceByType((pointer *)&pCounter, stuff->cid, RTCounter, - client, DixWriteAccess); - if (rc != Success) - return (rc == BadValue) ? SyncErrorBase + XSyncBadCounter : rc; - - if (IsSystemCounter(pCounter)) - { - client->errorValue = stuff->cid; - return BadAccess; - } - - XSyncIntsToValue(&newvalue, stuff->value_lo, stuff->value_hi); - SyncChangeCounter(pCounter, newvalue); - return Success; -} - -/* - * ** Change Counter value - */ -static int -ProcSyncChangeCounter(ClientPtr client) -{ - REQUEST(xSyncChangeCounterReq); - SyncCounter *pCounter; - CARD64 newvalue; - Bool overflow; - int rc; - - REQUEST_SIZE_MATCH(xSyncChangeCounterReq); - - rc = dixLookupResourceByType((pointer *)&pCounter, stuff->cid, RTCounter, - client, DixWriteAccess); - if (rc != Success) - return (rc == BadValue) ? SyncErrorBase + XSyncBadCounter : rc; - - if (IsSystemCounter(pCounter)) - { - client->errorValue = stuff->cid; - return BadAccess; - } - - XSyncIntsToValue(&newvalue, stuff->value_lo, stuff->value_hi); - XSyncValueAdd(&newvalue, pCounter->value, newvalue, &overflow); - if (overflow) - { - /* XXX 64 bit value can't fit in 32 bits; do the best we can */ - client->errorValue = stuff->value_hi; - return BadValue; - } - SyncChangeCounter(pCounter, newvalue); - return Success; -} - -/* - * ** Destroy a counter - */ -static int -ProcSyncDestroyCounter(ClientPtr client) -{ - REQUEST(xSyncDestroyCounterReq); - SyncCounter *pCounter; - int rc; - - REQUEST_SIZE_MATCH(xSyncDestroyCounterReq); - - rc = dixLookupResourceByType((pointer *)&pCounter, stuff->counter, RTCounter, - client, DixDestroyAccess); - if (rc != Success) - return (rc == BadValue) ? SyncErrorBase + XSyncBadCounter : rc; - - if (IsSystemCounter(pCounter)) - { - client->errorValue = stuff->counter; - return BadAccess; - } - FreeResource(pCounter->id, RT_NONE); - return Success; -} - - -/* - * ** Await - */ -static int -ProcSyncAwait(ClientPtr client) -{ - REQUEST(xSyncAwaitReq); - int len, items; - int i; - xSyncWaitCondition *pProtocolWaitConds; - SyncAwaitUnion *pAwaitUnion; - SyncAwait *pAwait; - int status; - - REQUEST_AT_LEAST_SIZE(xSyncAwaitReq); - - len = client->req_len << 2; - len -= sz_xSyncAwaitReq; - items = len / sz_xSyncWaitCondition; - - if (items * sz_xSyncWaitCondition != len) - { - return BadLength; - } - if (items == 0) - { - client->errorValue = items; /* XXX protocol change */ - return BadValue; - } - - pProtocolWaitConds = (xSyncWaitCondition *) & stuff[1]; - - /* all the memory for the entire await list is allocated - * here in one chunk - */ - pAwaitUnion = malloc((items+1) * sizeof(SyncAwaitUnion)); - if (!pAwaitUnion) - return BadAlloc; - - /* first item is the header, remainder are real wait conditions */ - - pAwaitUnion->header.delete_id = FakeClientID(client->index); - if (!AddResource(pAwaitUnion->header.delete_id, RTAwait, pAwaitUnion)) - { - free(pAwaitUnion); - return BadAlloc; - } - - /* don't need to do any more memory allocation for this request! */ - - pAwaitUnion->header.client = client; - pAwaitUnion->header.num_waitconditions = 0; - - pAwait = &(pAwaitUnion+1)->await; /* skip over header */ - for (i = 0; i < items; i++, pProtocolWaitConds++, pAwait++) - { - if (pProtocolWaitConds->counter == None) /* XXX protocol change */ - { - /* this should take care of removing any triggers created by - * this request that have already been registered on counters - */ - FreeResource(pAwaitUnion->header.delete_id, RT_NONE); - client->errorValue = pProtocolWaitConds->counter; - return SyncErrorBase + XSyncBadCounter; - } - - /* sanity checks are in SyncInitTrigger */ - pAwait->trigger.pCounter = NULL; - pAwait->trigger.value_type = pProtocolWaitConds->value_type; - XSyncIntsToValue(&pAwait->trigger.wait_value, - pProtocolWaitConds->wait_value_lo, - pProtocolWaitConds->wait_value_hi); - pAwait->trigger.test_type = pProtocolWaitConds->test_type; - - status = SyncInitTrigger(client, &pAwait->trigger, - pProtocolWaitConds->counter, XSyncCAAllTrigger); - if (status != Success) - { - /* this should take care of removing any triggers created by - * this request that have already been registered on counters - */ - FreeResource(pAwaitUnion->header.delete_id, RT_NONE); - return status; - } - /* this is not a mistake -- same function works for both cases */ - pAwait->trigger.TriggerFired = SyncAwaitTriggerFired; - pAwait->trigger.CounterDestroyed = SyncAwaitTriggerFired; - XSyncIntsToValue(&pAwait->event_threshold, - pProtocolWaitConds->event_threshold_lo, - pProtocolWaitConds->event_threshold_hi); - pAwait->pHeader = &pAwaitUnion->header; - pAwaitUnion->header.num_waitconditions++; - } - - IgnoreClient(client); - - /* see if any of the triggers are already true */ - - pAwait = &(pAwaitUnion+1)->await; /* skip over header */ - for (i = 0; i < items; i++, pAwait++) - { - /* don't have to worry about NULL counters because the request - * errors before we get here out if they occur - */ - if ((*pAwait->trigger.CheckTrigger)(&pAwait->trigger, - pAwait->trigger.pCounter->value)) - { - (*pAwait->trigger.TriggerFired)(&pAwait->trigger); - break; /* once is enough */ - } - } - return Success; -} - - -/* - * ** Query a counter - */ -static int -ProcSyncQueryCounter(ClientPtr client) -{ - REQUEST(xSyncQueryCounterReq); - xSyncQueryCounterReply rep; - SyncCounter *pCounter; - int rc; - - REQUEST_SIZE_MATCH(xSyncQueryCounterReq); - - rc = dixLookupResourceByType((pointer *)&pCounter, stuff->counter, - RTCounter, client, DixReadAccess); - if (rc != Success) - return (rc == BadValue) ? SyncErrorBase + XSyncBadCounter : rc; - - rep.type = X_Reply; - rep.length = 0; - rep.sequenceNumber = client->sequence; - - /* if system counter, ask it what the current value is */ - - if (IsSystemCounter(pCounter)) - { - (*pCounter->pSysCounterInfo->QueryValue) ((pointer) pCounter, - &pCounter->value); - } - - rep.value_hi = XSyncValueHigh32(pCounter->value); - rep.value_lo = XSyncValueLow32(pCounter->value); - if (client->swapped) - { - char n; - swaps(&rep.sequenceNumber, n); - swapl(&rep.length, n); - swapl(&rep.value_hi, n); - swapl(&rep.value_lo, n); - } - WriteToClient(client, sizeof(xSyncQueryCounterReply), (char *) &rep); - return Success; -} - - -/* - * ** Create Alarm - */ -static int -ProcSyncCreateAlarm(ClientPtr client) -{ - REQUEST(xSyncCreateAlarmReq); - SyncAlarm *pAlarm; - int status; - unsigned long len, vmask; - SyncTrigger *pTrigger; - - REQUEST_AT_LEAST_SIZE(xSyncCreateAlarmReq); - - LEGAL_NEW_RESOURCE(stuff->id, client); - - vmask = stuff->valueMask; - len = client->req_len - bytes_to_int32(sizeof(xSyncCreateAlarmReq)); - /* the "extra" call to Ones accounts for the presence of 64 bit values */ - if (len != (Ones(vmask) + Ones(vmask & (XSyncCAValue|XSyncCADelta)))) - return BadLength; - - if (!(pAlarm = malloc(sizeof(SyncAlarm)))) - { - return BadAlloc; - } - - /* set up defaults */ - - pTrigger = &pAlarm->trigger; - pTrigger->pCounter = NULL; - pTrigger->value_type = XSyncAbsolute; - XSyncIntToValue(&pTrigger->wait_value, 0L); - pTrigger->test_type = XSyncPositiveComparison; - pTrigger->TriggerFired = SyncAlarmTriggerFired; - pTrigger->CounterDestroyed = SyncAlarmCounterDestroyed; - status = SyncInitTrigger(client, pTrigger, None, XSyncCAAllTrigger); - if (status != Success) - { - free(pAlarm); - return status; - } - - pAlarm->client = client; - pAlarm->alarm_id = stuff->id; - XSyncIntToValue(&pAlarm->delta, 1L); - pAlarm->events = TRUE; - pAlarm->state = XSyncAlarmInactive; - pAlarm->pEventClients = NULL; - status = SyncChangeAlarmAttributes(client, pAlarm, vmask, - (CARD32 *)&stuff[1]); - if (status != Success) - { - free(pAlarm); - return status; - } - - if (!AddResource(stuff->id, RTAlarm, pAlarm)) - { - free(pAlarm); - return BadAlloc; - } - - /* see if alarm already triggered. NULL counter will not trigger - * in CreateAlarm and sets alarm state to Inactive. - */ - - if (!pTrigger->pCounter) - { - pAlarm->state = XSyncAlarmInactive; /* XXX protocol change */ - } - else if ((*pTrigger->CheckTrigger)(pTrigger, pTrigger->pCounter->value)) - { - (*pTrigger->TriggerFired)(pTrigger); - } - - return Success; -} - -/* - * ** Change Alarm - */ -static int -ProcSyncChangeAlarm(ClientPtr client) -{ - REQUEST(xSyncChangeAlarmReq); - SyncAlarm *pAlarm; - long vmask; - int len, status; - - REQUEST_AT_LEAST_SIZE(xSyncChangeAlarmReq); - - status = dixLookupResourceByType((pointer *)&pAlarm, stuff->alarm, RTAlarm, - client, DixWriteAccess); - if (status != Success) - return (status == BadValue) ? SyncErrorBase + XSyncBadAlarm : status; - - vmask = stuff->valueMask; - len = client->req_len - bytes_to_int32(sizeof(xSyncChangeAlarmReq)); - /* the "extra" call to Ones accounts for the presence of 64 bit values */ - if (len != (Ones(vmask) + Ones(vmask & (XSyncCAValue|XSyncCADelta)))) - return BadLength; - - if ((status = SyncChangeAlarmAttributes(client, pAlarm, vmask, - (CARD32 *)&stuff[1])) != Success) - return status; - - /* see if alarm already triggered. NULL counter WILL trigger - * in ChangeAlarm. - */ - - if (!pAlarm->trigger.pCounter || - (*pAlarm->trigger.CheckTrigger)(&pAlarm->trigger, - pAlarm->trigger.pCounter->value)) - { - (*pAlarm->trigger.TriggerFired)(&pAlarm->trigger); - } - return Success; -} - -static int -ProcSyncQueryAlarm(ClientPtr client) -{ - REQUEST(xSyncQueryAlarmReq); - SyncAlarm *pAlarm; - xSyncQueryAlarmReply rep; - SyncTrigger *pTrigger; - int rc; - - REQUEST_SIZE_MATCH(xSyncQueryAlarmReq); - - rc = dixLookupResourceByType((pointer *)&pAlarm, stuff->alarm, RTAlarm, - client, DixReadAccess); - if (rc != Success) - return (rc == BadValue) ? SyncErrorBase + XSyncBadAlarm : rc; - - rep.type = X_Reply; - rep.length = bytes_to_int32(sizeof(xSyncQueryAlarmReply) - sizeof(xGenericReply)); - rep.sequenceNumber = client->sequence; - - pTrigger = &pAlarm->trigger; - rep.counter = (pTrigger->pCounter) ? pTrigger->pCounter->id : None; - -#if 0 /* XXX unclear what to do, depends on whether relative value-types - * are "consumed" immediately and are considered absolute from then - * on. - */ - rep.value_type = pTrigger->value_type; - rep.wait_value_hi = XSyncValueHigh32(pTrigger->wait_value); - rep.wait_value_lo = XSyncValueLow32(pTrigger->wait_value); -#else - rep.value_type = XSyncAbsolute; - rep.wait_value_hi = XSyncValueHigh32(pTrigger->test_value); - rep.wait_value_lo = XSyncValueLow32(pTrigger->test_value); -#endif - - rep.test_type = pTrigger->test_type; - rep.delta_hi = XSyncValueHigh32(pAlarm->delta); - rep.delta_lo = XSyncValueLow32(pAlarm->delta); - rep.events = pAlarm->events; - rep.state = pAlarm->state; - - if (client->swapped) - { - char n; - swaps(&rep.sequenceNumber, n); - swapl(&rep.length, n); - swapl(&rep.counter, n); - swapl(&rep.wait_value_hi, n); - swapl(&rep.wait_value_lo, n); - swapl(&rep.test_type, n); - swapl(&rep.delta_hi, n); - swapl(&rep.delta_lo, n); - } - - WriteToClient(client, sizeof(xSyncQueryAlarmReply), (char *) &rep); - return Success; -} - -static int -ProcSyncDestroyAlarm(ClientPtr client) -{ - SyncAlarm *pAlarm; - int rc; - REQUEST(xSyncDestroyAlarmReq); - - REQUEST_SIZE_MATCH(xSyncDestroyAlarmReq); - - rc = dixLookupResourceByType((pointer *)&pAlarm, stuff->alarm, RTAlarm, - client, DixDestroyAccess); - if (rc != Success) - return (rc == BadValue) ? SyncErrorBase + XSyncBadAlarm : rc; - - FreeResource(stuff->alarm, RT_NONE); - return Success; -} - -/* - * ** Given an extension request, call the appropriate request procedure - */ -static int -ProcSyncDispatch(ClientPtr client) -{ - REQUEST(xReq); - - switch (stuff->data) - { - case X_SyncInitialize: - return ProcSyncInitialize(client); - case X_SyncListSystemCounters: - return ProcSyncListSystemCounters(client); - case X_SyncCreateCounter: - return ProcSyncCreateCounter(client); - case X_SyncSetCounter: - return ProcSyncSetCounter(client); - case X_SyncChangeCounter: - return ProcSyncChangeCounter(client); - case X_SyncQueryCounter: - return ProcSyncQueryCounter(client); - case X_SyncDestroyCounter: - return ProcSyncDestroyCounter(client); - case X_SyncAwait: - return ProcSyncAwait(client); - case X_SyncCreateAlarm: - return ProcSyncCreateAlarm(client); - case X_SyncChangeAlarm: - return ProcSyncChangeAlarm(client); - case X_SyncQueryAlarm: - return ProcSyncQueryAlarm(client); - case X_SyncDestroyAlarm: - return ProcSyncDestroyAlarm(client); - case X_SyncSetPriority: - return ProcSyncSetPriority(client); - case X_SyncGetPriority: - return ProcSyncGetPriority(client); - default: - return BadRequest; - } -} - -/* - * Boring Swapping stuff ... - */ - -static int -SProcSyncInitialize(ClientPtr client) -{ - REQUEST(xSyncInitializeReq); - char n; - - swaps(&stuff->length, n); - REQUEST_SIZE_MATCH (xSyncInitializeReq); - - return ProcSyncInitialize(client); -} - -static int -SProcSyncListSystemCounters(ClientPtr client) -{ - REQUEST(xSyncListSystemCountersReq); - char n; - - swaps(&stuff->length, n); - REQUEST_SIZE_MATCH (xSyncListSystemCountersReq); - - return ProcSyncListSystemCounters(client); -} - -static int -SProcSyncCreateCounter(ClientPtr client) -{ - REQUEST(xSyncCreateCounterReq); - char n; - - swaps(&stuff->length, n); - REQUEST_SIZE_MATCH (xSyncCreateCounterReq); - swapl(&stuff->cid, n); - swapl(&stuff->initial_value_lo, n); - swapl(&stuff->initial_value_hi, n); - - return ProcSyncCreateCounter(client); -} - -static int -SProcSyncSetCounter(ClientPtr client) -{ - REQUEST(xSyncSetCounterReq); - char n; - - swaps(&stuff->length, n); - REQUEST_SIZE_MATCH (xSyncSetCounterReq); - swapl(&stuff->cid, n); - swapl(&stuff->value_lo, n); - swapl(&stuff->value_hi, n); - - return ProcSyncSetCounter(client); -} - -static int -SProcSyncChangeCounter(ClientPtr client) -{ - REQUEST(xSyncChangeCounterReq); - char n; - - swaps(&stuff->length, n); - REQUEST_SIZE_MATCH (xSyncChangeCounterReq); - swapl(&stuff->cid, n); - swapl(&stuff->value_lo, n); - swapl(&stuff->value_hi, n); - - return ProcSyncChangeCounter(client); -} - -static int -SProcSyncQueryCounter(ClientPtr client) -{ - REQUEST(xSyncQueryCounterReq); - char n; - - swaps(&stuff->length, n); - REQUEST_SIZE_MATCH (xSyncQueryCounterReq); - swapl(&stuff->counter, n); - - return ProcSyncQueryCounter(client); -} - -static int -SProcSyncDestroyCounter(ClientPtr client) -{ - REQUEST(xSyncDestroyCounterReq); - char n; - - swaps(&stuff->length, n); - REQUEST_SIZE_MATCH (xSyncDestroyCounterReq); - swapl(&stuff->counter, n); - - return ProcSyncDestroyCounter(client); -} - -static int -SProcSyncAwait(ClientPtr client) -{ - REQUEST(xSyncAwaitReq); - char n; - - swaps(&stuff->length, n); - REQUEST_AT_LEAST_SIZE(xSyncAwaitReq); - SwapRestL(stuff); - - return ProcSyncAwait(client); -} - -static int -SProcSyncCreateAlarm(ClientPtr client) -{ - REQUEST(xSyncCreateAlarmReq); - char n; - - swaps(&stuff->length, n); - REQUEST_AT_LEAST_SIZE(xSyncCreateAlarmReq); - swapl(&stuff->id, n); - swapl(&stuff->valueMask, n); - SwapRestL(stuff); - - return ProcSyncCreateAlarm(client); -} - -static int -SProcSyncChangeAlarm(ClientPtr client) -{ - REQUEST(xSyncChangeAlarmReq); - char n; - - swaps(&stuff->length, n); - REQUEST_AT_LEAST_SIZE(xSyncChangeAlarmReq); - swapl(&stuff->alarm, n); - swapl(&stuff->valueMask, n); - SwapRestL(stuff); - return ProcSyncChangeAlarm(client); -} - -static int -SProcSyncQueryAlarm(ClientPtr client) -{ - REQUEST(xSyncQueryAlarmReq); - char n; - - swaps(&stuff->length, n); - REQUEST_SIZE_MATCH (xSyncQueryAlarmReq); - swapl(&stuff->alarm, n); - - return ProcSyncQueryAlarm(client); -} - -static int -SProcSyncDestroyAlarm(ClientPtr client) -{ - REQUEST(xSyncDestroyAlarmReq); - char n; - - swaps(&stuff->length, n); - REQUEST_SIZE_MATCH (xSyncDestroyAlarmReq); - swapl(&stuff->alarm, n); - - return ProcSyncDestroyAlarm(client); -} - -static int -SProcSyncSetPriority(ClientPtr client) -{ - REQUEST(xSyncSetPriorityReq); - char n; - - swaps(&stuff->length, n); - REQUEST_SIZE_MATCH (xSyncSetPriorityReq); - swapl(&stuff->id, n); - swapl(&stuff->priority, n); - - return ProcSyncSetPriority(client); -} - -static int -SProcSyncGetPriority(ClientPtr client) -{ - REQUEST(xSyncGetPriorityReq); - char n; - - swaps(&stuff->length, n); - REQUEST_SIZE_MATCH (xSyncGetPriorityReq); - swapl(&stuff->id, n); - - return ProcSyncGetPriority(client); -} - - -static int -SProcSyncDispatch(ClientPtr client) -{ - REQUEST(xReq); - - switch (stuff->data) - { - case X_SyncInitialize: - return SProcSyncInitialize(client); - case X_SyncListSystemCounters: - return SProcSyncListSystemCounters(client); - case X_SyncCreateCounter: - return SProcSyncCreateCounter(client); - case X_SyncSetCounter: - return SProcSyncSetCounter(client); - case X_SyncChangeCounter: - return SProcSyncChangeCounter(client); - case X_SyncQueryCounter: - return SProcSyncQueryCounter(client); - case X_SyncDestroyCounter: - return SProcSyncDestroyCounter(client); - case X_SyncAwait: - return SProcSyncAwait(client); - case X_SyncCreateAlarm: - return SProcSyncCreateAlarm(client); - case X_SyncChangeAlarm: - return SProcSyncChangeAlarm(client); - case X_SyncQueryAlarm: - return SProcSyncQueryAlarm(client); - case X_SyncDestroyAlarm: - return SProcSyncDestroyAlarm(client); - case X_SyncSetPriority: - return SProcSyncSetPriority(client); - case X_SyncGetPriority: - return SProcSyncGetPriority(client); - default: - return BadRequest; - } -} - -/* - * Event Swapping - */ - -static void -SCounterNotifyEvent(xSyncCounterNotifyEvent *from, xSyncCounterNotifyEvent *to) -{ - to->type = from->type; - to->kind = from->kind; - cpswaps(from->sequenceNumber, to->sequenceNumber); - cpswapl(from->counter, to->counter); - cpswapl(from->wait_value_lo, to->wait_value_lo); - cpswapl(from->wait_value_hi, to->wait_value_hi); - cpswapl(from->counter_value_lo, to->counter_value_lo); - cpswapl(from->counter_value_hi, to->counter_value_hi); - cpswapl(from->time, to->time); - cpswaps(from->count, to->count); - to->destroyed = from->destroyed; -} - - -static void -SAlarmNotifyEvent(xSyncAlarmNotifyEvent *from, xSyncAlarmNotifyEvent *to) -{ - to->type = from->type; - to->kind = from->kind; - cpswaps(from->sequenceNumber, to->sequenceNumber); - cpswapl(from->alarm, to->alarm); - cpswapl(from->counter_value_lo, to->counter_value_lo); - cpswapl(from->counter_value_hi, to->counter_value_hi); - cpswapl(from->alarm_value_lo, to->alarm_value_lo); - cpswapl(from->alarm_value_hi, to->alarm_value_hi); - cpswapl(from->time, to->time); - to->state = from->state; -} - -/* - * ** Close everything down. ** This is fairly simple for now. - */ -/* ARGSUSED */ -static void -SyncResetProc(ExtensionEntry *extEntry) -{ - free(SysCounterList); - SysCounterList = NULL; - RTCounter = 0; -} - - -/* - * ** Initialise the extension. - */ -void -SyncExtensionInit(void) -{ - ExtensionEntry *extEntry; - - if (RTCounter == 0) - { - RTCounter = CreateNewResourceType(FreeCounter, "SyncCounter"); - } - RTAlarm = CreateNewResourceType(FreeAlarm, "SyncAlarm"); - RTAwait = CreateNewResourceType(FreeAwait, "SyncAwait"); - if (RTAwait) - RTAwait |= RC_NEVERRETAIN; - RTAlarmClient = CreateNewResourceType(FreeAlarmClient, "SyncAlarmClient"); - if (RTAlarmClient) - RTAlarmClient |= RC_NEVERRETAIN; - - if (RTCounter == 0 || RTAwait == 0 || RTAlarm == 0 || - RTAlarmClient == 0 || - (extEntry = AddExtension(SYNC_NAME, - XSyncNumberEvents, XSyncNumberErrors, - ProcSyncDispatch, SProcSyncDispatch, - SyncResetProc, - StandardMinorOpcode)) == NULL) - { - ErrorF("Sync Extension %d.%d failed to Initialise\n", - SYNC_MAJOR_VERSION, SYNC_MINOR_VERSION); - return; - } - - SyncEventBase = extEntry->eventBase; - SyncErrorBase = extEntry->errorBase; - EventSwapVector[SyncEventBase + XSyncCounterNotify] = (EventSwapPtr) SCounterNotifyEvent; - EventSwapVector[SyncEventBase + XSyncAlarmNotify] = (EventSwapPtr) SAlarmNotifyEvent; - - /* - * Although SERVERTIME is implemented by the OS layer, we initialise it - * here because doing it in OsInit() is too early. The resource database - * is not initialised when OsInit() is called. This is just about OK - * because there is always a servertime counter. - */ - SyncInitServerTime(); - SyncInitIdleTime(); - -#ifdef DEBUG - fprintf(stderr, "Sync Extension %d.%d\n", - SYNC_MAJOR_VERSION, SYNC_MINOR_VERSION); -#endif -} - - -/* - * ***** SERVERTIME implementation - should go in its own file in OS directory? - */ - - - -static pointer ServertimeCounter; -static XSyncValue Now; -static XSyncValue *pnext_time; - -#define GetTime()\ -{\ - unsigned long millis = GetTimeInMillis();\ - unsigned long maxis = XSyncValueHigh32(Now);\ - if (millis < XSyncValueLow32(Now)) maxis++;\ - XSyncIntsToValue(&Now, millis, maxis);\ -} - -/* -*** Server Block Handler -*** code inspired by multibuffer extension (now deprecated) - */ -/*ARGSUSED*/ -static void -ServertimeBlockHandler(void *env, struct timeval **wt, void *LastSelectMask) -{ - XSyncValue delay; - unsigned long timeout; - - if (pnext_time) - { - GetTime(); - - if (XSyncValueGreaterOrEqual(Now, *pnext_time)) - { - timeout = 0; - } - else - { - Bool overflow; - XSyncValueSubtract(&delay, *pnext_time, Now, &overflow); - (void)overflow; - timeout = XSyncValueLow32(delay); - } - AdjustWaitForDelay(wt, timeout); /* os/utils.c */ - } -} - -/* -*** Wakeup Handler - */ -/*ARGSUSED*/ -static void -ServertimeWakeupHandler(void *env, int rc, void *LastSelectMask) -{ - if (pnext_time) - { - GetTime(); - - if (XSyncValueGreaterOrEqual(Now, *pnext_time)) - { - SyncChangeCounter(ServertimeCounter, Now); - } - } -} - -static void -ServertimeQueryValue(void *pCounter, CARD64 *pValue_return) -{ - GetTime(); - *pValue_return = Now; -} - -static void -ServertimeBracketValues(void *pCounter, CARD64 *pbracket_less, - CARD64 *pbracket_greater) -{ - if (!pnext_time && pbracket_greater) - { - RegisterBlockAndWakeupHandlers(ServertimeBlockHandler, - ServertimeWakeupHandler, - NULL); - } - else if (pnext_time && !pbracket_greater) - { - RemoveBlockAndWakeupHandlers(ServertimeBlockHandler, - ServertimeWakeupHandler, - NULL); - } - pnext_time = pbracket_greater; -} - -static void -SyncInitServerTime(void) -{ - CARD64 resolution; - - XSyncIntsToValue(&Now, GetTimeInMillis(), 0); - XSyncIntToValue(&resolution, 4); - ServertimeCounter = SyncCreateSystemCounter("SERVERTIME", Now, resolution, - XSyncCounterNeverDecreases, - ServertimeQueryValue, ServertimeBracketValues); - pnext_time = NULL; -} - - - -/* - * IDLETIME implementation - */ - -static SyncCounter *IdleTimeCounter; -static XSyncValue *pIdleTimeValueLess; -static XSyncValue *pIdleTimeValueGreater; - -static void -IdleTimeQueryValue (pointer pCounter, CARD64 *pValue_return) -{ - CARD32 idle = GetTimeInMillis() - lastDeviceEventTime.milliseconds; - XSyncIntsToValue (pValue_return, idle, 0); -} - -static void -IdleTimeBlockHandler(pointer env, struct timeval **wt, pointer LastSelectMask) -{ - XSyncValue idle, old_idle; - SyncTriggerList *list = IdleTimeCounter->pTriglist; - SyncTrigger *trig; - - if (!pIdleTimeValueLess && !pIdleTimeValueGreater) - return; - - old_idle = IdleTimeCounter->value; - IdleTimeQueryValue (NULL, &idle); - IdleTimeCounter->value = idle; /* push, so CheckTrigger works */ - - if (pIdleTimeValueLess && - XSyncValueLessOrEqual (idle, *pIdleTimeValueLess)) - { - /* - * We've been idle for less than the threshold value, and someone - * wants to know about that, but now we need to know whether they - * want level or edge trigger. Check the trigger list against the - * current idle time, and if any succeed, bomb out of select() - * immediately so we can reschedule. - */ - - for (list = IdleTimeCounter->pTriglist; list; list = list->next) { - trig = list->pTrigger; - if (trig->CheckTrigger(trig, old_idle)) { - AdjustWaitForDelay(wt, 0); - break; - } - } - } - else if (pIdleTimeValueGreater) - { - /* - * There's a threshold in the positive direction. If we've been - * idle less than it, schedule a wakeup for sometime in the future. - * If we've been idle more than it, and someone wants to know about - * that level-triggered, schedule an immediate wakeup. - */ - unsigned long timeout = -1; - - if (XSyncValueLessThan (idle, *pIdleTimeValueGreater)) { - XSyncValue value; - Bool overflow; - - XSyncValueSubtract (&value, *pIdleTimeValueGreater, - idle, &overflow); - timeout = min(timeout, XSyncValueLow32 (value)); - } else { - for (list = IdleTimeCounter->pTriglist; list; list = list->next) { - trig = list->pTrigger; - if (trig->CheckTrigger(trig, old_idle)) { - timeout = min(timeout, 0); - break; - } - } - } - - AdjustWaitForDelay (wt, timeout); - } - - IdleTimeCounter->value = old_idle; /* pop */ -} - -static void -IdleTimeWakeupHandler (pointer env, int rc, pointer LastSelectMask) -{ - XSyncValue idle; - - if (!pIdleTimeValueLess && !pIdleTimeValueGreater) - return; - - IdleTimeQueryValue (NULL, &idle); - - if ((pIdleTimeValueGreater && - XSyncValueGreaterOrEqual (idle, *pIdleTimeValueGreater)) || - (pIdleTimeValueLess && - XSyncValueLessOrEqual (idle, *pIdleTimeValueLess))) - { - SyncChangeCounter (IdleTimeCounter, idle); - } -} - -static void -IdleTimeBracketValues (pointer pCounter, CARD64 *pbracket_less, - CARD64 *pbracket_greater) -{ - Bool registered = (pIdleTimeValueLess || pIdleTimeValueGreater); - - if (registered && !pbracket_less && !pbracket_greater) - { - RemoveBlockAndWakeupHandlers(IdleTimeBlockHandler, - IdleTimeWakeupHandler, - NULL); - } - else if (!registered && (pbracket_less || pbracket_greater)) - { - RegisterBlockAndWakeupHandlers(IdleTimeBlockHandler, - IdleTimeWakeupHandler, - NULL); - } - - pIdleTimeValueGreater = pbracket_greater; - pIdleTimeValueLess = pbracket_less; -} - -static void -SyncInitIdleTime (void) -{ - CARD64 resolution; - XSyncValue idle; - - IdleTimeQueryValue (NULL, &idle); - XSyncIntToValue (&resolution, 4); - - IdleTimeCounter = SyncCreateSystemCounter ("IDLETIME", idle, resolution, - XSyncCounterUnrestricted, - IdleTimeQueryValue, - IdleTimeBracketValues); - - pIdleTimeValueLess = pIdleTimeValueGreater = NULL; -} +/*
+
+Copyright 1991, 1993, 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 1991, 1993 by Digital Equipment Corporation, Maynard, Massachusetts,
+and Olivetti Research Limited, Cambridge, England.
+
+ 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 names of Digital or Olivetti
+not be used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission. Digital and Olivetti
+make no representations about the suitability of this software
+for any purpose. It is provided "as is" without express or implied warranty.
+
+DIGITAL AND OLIVETTI DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
+SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS, IN NO EVENT SHALL THEY 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.
+
+*/
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include <string.h>
+
+#include <X11/X.h>
+#include <X11/Xproto.h>
+#include <X11/Xmd.h>
+#include "misc.h"
+#include "os.h"
+#include "extnsionst.h"
+#include "dixstruct.h"
+#include "resource.h"
+#include "opaque.h"
+#include <X11/extensions/syncproto.h>
+#include "syncsrv.h"
+
+#include <stdio.h>
+#if !defined(WIN32)
+#include <sys/time.h>
+#endif
+
+#include "modinit.h"
+
+/*
+ * Local Global Variables
+ */
+static int SyncEventBase;
+static int SyncErrorBase;
+static RESTYPE RTCounter = 0;
+static RESTYPE RTAwait;
+static RESTYPE RTAlarm;
+static RESTYPE RTAlarmClient;
+static int SyncNumSystemCounters = 0;
+static SyncCounter **SysCounterList = NULL;
+
+#define IsSystemCounter(pCounter) \
+ (pCounter && (pCounter->client == NULL))
+
+/* these are all the alarm attributes that pertain to the alarm's trigger */
+#define XSyncCAAllTrigger \
+ (XSyncCACounter | XSyncCAValueType | XSyncCAValue | XSyncCATestType)
+
+static void SyncComputeBracketValues(SyncCounter *);
+
+static void SyncInitServerTime(void);
+
+static void SyncInitIdleTime(void);
+
+static DISPATCH_PROC(ProcSyncAwait);
+static DISPATCH_PROC(ProcSyncChangeAlarm);
+static DISPATCH_PROC(ProcSyncChangeCounter);
+static DISPATCH_PROC(ProcSyncCreateAlarm);
+static DISPATCH_PROC(ProcSyncCreateCounter);
+static DISPATCH_PROC(ProcSyncDestroyAlarm);
+static DISPATCH_PROC(ProcSyncDestroyCounter);
+static DISPATCH_PROC(ProcSyncDispatch);
+static DISPATCH_PROC(ProcSyncGetPriority);
+static DISPATCH_PROC(ProcSyncInitialize);
+static DISPATCH_PROC(ProcSyncListSystemCounters);
+static DISPATCH_PROC(ProcSyncQueryAlarm);
+static DISPATCH_PROC(ProcSyncQueryCounter);
+static DISPATCH_PROC(ProcSyncSetCounter);
+static DISPATCH_PROC(ProcSyncSetPriority);
+static DISPATCH_PROC(SProcSyncAwait);
+static DISPATCH_PROC(SProcSyncChangeAlarm);
+static DISPATCH_PROC(SProcSyncChangeCounter);
+static DISPATCH_PROC(SProcSyncCreateAlarm);
+static DISPATCH_PROC(SProcSyncCreateCounter);
+static DISPATCH_PROC(SProcSyncDestroyAlarm);
+static DISPATCH_PROC(SProcSyncDestroyCounter);
+static DISPATCH_PROC(SProcSyncDispatch);
+static DISPATCH_PROC(SProcSyncGetPriority);
+static DISPATCH_PROC(SProcSyncInitialize);
+static DISPATCH_PROC(SProcSyncListSystemCounters);
+static DISPATCH_PROC(SProcSyncQueryAlarm);
+static DISPATCH_PROC(SProcSyncQueryCounter);
+static DISPATCH_PROC(SProcSyncSetCounter);
+static DISPATCH_PROC(SProcSyncSetPriority);
+
+/* Each counter maintains a simple linked list of triggers that are
+ * interested in the counter. The two functions below are used to
+ * delete and add triggers on this list.
+ */
+static void
+SyncDeleteTriggerFromCounter(SyncTrigger *pTrigger)
+{
+ SyncTriggerList *pCur;
+ SyncTriggerList *pPrev;
+
+ /* pCounter needs to be stored in pTrigger before calling here. */
+
+ if (!pTrigger->pCounter)
+ return;
+
+ pPrev = NULL;
+ pCur = pTrigger->pCounter->pTriglist;
+
+ while (pCur)
+ {
+ if (pCur->pTrigger == pTrigger)
+ {
+ if (pPrev)
+ pPrev->next = pCur->next;
+ else
+ pTrigger->pCounter->pTriglist = pCur->next;
+
+ free(pCur);
+ break;
+ }
+
+ pPrev = pCur;
+ pCur = pCur->next;
+ }
+
+ if (IsSystemCounter(pTrigger->pCounter))
+ SyncComputeBracketValues(pTrigger->pCounter);
+}
+
+
+static int
+SyncAddTriggerToCounter(SyncTrigger *pTrigger)
+{
+ SyncTriggerList *pCur;
+
+ if (!pTrigger->pCounter)
+ return Success;
+
+ /* don't do anything if it's already there */
+ for (pCur = pTrigger->pCounter->pTriglist; pCur; pCur = pCur->next)
+ {
+ if (pCur->pTrigger == pTrigger)
+ return Success;
+ }
+
+ if (!(pCur = malloc(sizeof(SyncTriggerList))))
+ return BadAlloc;
+
+ pCur->pTrigger = pTrigger;
+ pCur->next = pTrigger->pCounter->pTriglist;
+ pTrigger->pCounter->pTriglist = pCur;
+
+ if (IsSystemCounter(pTrigger->pCounter))
+ SyncComputeBracketValues(pTrigger->pCounter);
+
+ return Success;
+}
+
+
+/* Below are four possible functions that can be plugged into
+ * pTrigger->CheckTrigger, corresponding to the four possible
+ * test-types. These functions are called after the counter's
+ * value changes but are also passed the old counter value
+ * so they can inspect both the old and new values.
+ * (PositiveTransition and NegativeTransition need to see both
+ * pieces of information.) These functions return the truth value
+ * of the trigger.
+ *
+ * All of them include the condition pTrigger->pCounter == NULL.
+ * This is because the spec says that a trigger with a counter value
+ * of None is always TRUE.
+ */
+
+static Bool
+SyncCheckTriggerPositiveComparison(SyncTrigger *pTrigger, CARD64 oldval)
+{
+ return (pTrigger->pCounter == NULL ||
+ XSyncValueGreaterOrEqual(pTrigger->pCounter->value,
+ pTrigger->test_value));
+}
+
+static Bool
+SyncCheckTriggerNegativeComparison(SyncTrigger *pTrigger, CARD64 oldval)
+{
+ return (pTrigger->pCounter == NULL ||
+ XSyncValueLessOrEqual(pTrigger->pCounter->value,
+ pTrigger->test_value));
+}
+
+static Bool
+SyncCheckTriggerPositiveTransition(SyncTrigger *pTrigger, CARD64 oldval)
+{
+ return (pTrigger->pCounter == NULL ||
+ (XSyncValueLessThan(oldval, pTrigger->test_value) &&
+ XSyncValueGreaterOrEqual(pTrigger->pCounter->value,
+ pTrigger->test_value)));
+}
+
+static Bool
+SyncCheckTriggerNegativeTransition(SyncTrigger *pTrigger, CARD64 oldval)
+{
+ return (pTrigger->pCounter == NULL ||
+ (XSyncValueGreaterThan(oldval, pTrigger->test_value) &&
+ XSyncValueLessOrEqual(pTrigger->pCounter->value,
+ pTrigger->test_value)));
+}
+
+static int
+SyncInitTrigger(ClientPtr client, SyncTrigger *pTrigger, XSyncCounter counter,
+ Mask changes)
+{
+ SyncCounter *pCounter = pTrigger->pCounter;
+ int rc;
+ Bool newcounter = FALSE;
+
+ if (changes & XSyncCACounter)
+ {
+ if (counter == None)
+ pCounter = NULL;
+ else if (Success != (rc = dixLookupResourceByType ((pointer *)&pCounter,
+ counter, RTCounter, client, DixReadAccess)))
+ {
+ client->errorValue = counter;
+ return rc;
+ }
+ if (pCounter != pTrigger->pCounter)
+ { /* new counter for trigger */
+ SyncDeleteTriggerFromCounter(pTrigger);
+ pTrigger->pCounter = pCounter;
+ newcounter = TRUE;
+ }
+ }
+
+ /* if system counter, ask it what the current value is */
+
+ if (IsSystemCounter(pCounter))
+ {
+ (*pCounter->pSysCounterInfo->QueryValue) ((pointer) pCounter,
+ &pCounter->value);
+ }
+
+ if (changes & XSyncCAValueType)
+ {
+ if (pTrigger->value_type != XSyncRelative &&
+ pTrigger->value_type != XSyncAbsolute)
+ {
+ client->errorValue = pTrigger->value_type;
+ return BadValue;
+ }
+ }
+
+ if (changes & XSyncCATestType)
+ {
+ if (pTrigger->test_type != XSyncPositiveTransition &&
+ pTrigger->test_type != XSyncNegativeTransition &&
+ pTrigger->test_type != XSyncPositiveComparison &&
+ pTrigger->test_type != XSyncNegativeComparison)
+ {
+ client->errorValue = pTrigger->test_type;
+ return BadValue;
+ }
+ /* select appropriate CheckTrigger function */
+
+ switch (pTrigger->test_type)
+ {
+ case XSyncPositiveTransition:
+ pTrigger->CheckTrigger = SyncCheckTriggerPositiveTransition;
+ break;
+ case XSyncNegativeTransition:
+ pTrigger->CheckTrigger = SyncCheckTriggerNegativeTransition;
+ break;
+ case XSyncPositiveComparison:
+ pTrigger->CheckTrigger = SyncCheckTriggerPositiveComparison;
+ break;
+ case XSyncNegativeComparison:
+ pTrigger->CheckTrigger = SyncCheckTriggerNegativeComparison;
+ break;
+ }
+ }
+
+ if (changes & (XSyncCAValueType | XSyncCAValue))
+ {
+ if (pTrigger->value_type == XSyncAbsolute)
+ pTrigger->test_value = pTrigger->wait_value;
+ else /* relative */
+ {
+ Bool overflow;
+ if (pCounter == NULL)
+ return BadMatch;
+
+ XSyncValueAdd(&pTrigger->test_value, pCounter->value,
+ pTrigger->wait_value, &overflow);
+ if (overflow)
+ {
+ client->errorValue = XSyncValueHigh32(pTrigger->wait_value);
+ return BadValue;
+ }
+ }
+ }
+
+ /* we wait until we're sure there are no errors before registering
+ * a new counter on a trigger
+ */
+ if (newcounter)
+ {
+ if ((rc = SyncAddTriggerToCounter(pTrigger)) != Success)
+ return rc;
+ }
+ else if (IsSystemCounter(pCounter))
+ {
+ SyncComputeBracketValues(pCounter);
+ }
+
+ return Success;
+}
+
+/* AlarmNotify events happen in response to actions taken on an Alarm or
+ * the counter used by the alarm. AlarmNotify may be sent to multiple
+ * clients. The alarm maintains a list of clients interested in events.
+ */
+static void
+SyncSendAlarmNotifyEvents(SyncAlarm *pAlarm)
+{
+ SyncAlarmClientList *pcl;
+ xSyncAlarmNotifyEvent ane;
+ SyncTrigger *pTrigger = &pAlarm->trigger;
+
+ UpdateCurrentTime();
+
+ ane.type = SyncEventBase + XSyncAlarmNotify;
+ ane.kind = XSyncAlarmNotify;
+ ane.alarm = pAlarm->alarm_id;
+ if (pTrigger->pCounter)
+ {
+ ane.counter_value_hi = XSyncValueHigh32(pTrigger->pCounter->value);
+ ane.counter_value_lo = XSyncValueLow32(pTrigger->pCounter->value);
+ }
+ else
+ { /* XXX what else can we do if there's no counter? */
+ ane.counter_value_hi = ane.counter_value_lo = 0;
+ }
+
+ ane.alarm_value_hi = XSyncValueHigh32(pTrigger->test_value);
+ ane.alarm_value_lo = XSyncValueLow32(pTrigger->test_value);
+ ane.time = currentTime.milliseconds;
+ ane.state = pAlarm->state;
+
+ /* send to owner */
+ if (pAlarm->events)
+ WriteEventsToClient(pAlarm->client, 1, (xEvent *) &ane);
+
+ /* send to other interested clients */
+ for (pcl = pAlarm->pEventClients; pcl; pcl = pcl->next)
+ WriteEventsToClient(pcl->client, 1, (xEvent *) &ane);
+}
+
+
+/* CounterNotify events only occur in response to an Await. The events
+ * go only to the Awaiting client.
+ */
+static void
+SyncSendCounterNotifyEvents(ClientPtr client, SyncAwait **ppAwait,
+ int num_events)
+{
+ xSyncCounterNotifyEvent *pEvents, *pev;
+ int i;
+
+ if (client->clientGone)
+ return;
+ pev = pEvents = malloc(num_events * sizeof(xSyncCounterNotifyEvent));
+ if (!pEvents)
+ return;
+ UpdateCurrentTime();
+ for (i = 0; i < num_events; i++, ppAwait++, pev++)
+ {
+ SyncTrigger *pTrigger = &(*ppAwait)->trigger;
+ pev->type = SyncEventBase + XSyncCounterNotify;
+ pev->kind = XSyncCounterNotify;
+ pev->counter = pTrigger->pCounter->id;
+ pev->wait_value_lo = XSyncValueLow32(pTrigger->test_value);
+ pev->wait_value_hi = XSyncValueHigh32(pTrigger->test_value);
+ pev->counter_value_lo = XSyncValueLow32(pTrigger->pCounter->value);
+ pev->counter_value_hi = XSyncValueHigh32(pTrigger->pCounter->value);
+ pev->time = currentTime.milliseconds;
+ pev->count = num_events - i - 1; /* events remaining */
+ pev->destroyed = pTrigger->pCounter->beingDestroyed;
+ }
+ /* swapping will be taken care of by this */
+ WriteEventsToClient(client, num_events, (xEvent *)pEvents);
+ free(pEvents);
+}
+
+
+/* This function is called when an alarm's counter is destroyed.
+ * It is plugged into pTrigger->CounterDestroyed (for alarm triggers).
+ */
+static void
+SyncAlarmCounterDestroyed(SyncTrigger *pTrigger)
+{
+ SyncAlarm *pAlarm = (SyncAlarm *)pTrigger;
+
+ pAlarm->state = XSyncAlarmInactive;
+ SyncSendAlarmNotifyEvents(pAlarm);
+ pTrigger->pCounter = NULL;
+}
+
+
+/* This function is called when an alarm "goes off."
+ * It is plugged into pTrigger->TriggerFired (for alarm triggers).
+ */
+static void
+SyncAlarmTriggerFired(SyncTrigger *pTrigger)
+{
+ SyncAlarm *pAlarm = (SyncAlarm *)pTrigger;
+ CARD64 new_test_value;
+
+ /* no need to check alarm unless it's active */
+ if (pAlarm->state != XSyncAlarmActive)
+ return;
+
+ /* " if the counter value is None, or if the delta is 0 and
+ * the test-type is PositiveComparison or NegativeComparison,
+ * no change is made to value (test-value) and the alarm
+ * state is changed to Inactive before the event is generated."
+ */
+ if (pAlarm->trigger.pCounter == NULL
+ || (XSyncValueIsZero(pAlarm->delta)
+ && (pAlarm->trigger.test_type == XSyncPositiveComparison
+ || pAlarm->trigger.test_type == XSyncNegativeComparison)))
+ pAlarm->state = XSyncAlarmInactive;
+
+ new_test_value = pAlarm->trigger.test_value;
+
+ if (pAlarm->state == XSyncAlarmActive)
+ {
+ Bool overflow;
+ CARD64 oldvalue;
+ SyncTrigger *paTrigger = &pAlarm->trigger;
+
+ /* "The alarm is updated by repeatedly adding delta to the
+ * value of the trigger and re-initializing it until it
+ * becomes FALSE."
+ */
+ oldvalue = paTrigger->test_value;
+
+ /* XXX really should do something smarter here */
+
+ do
+ {
+ XSyncValueAdd(&paTrigger->test_value, paTrigger->test_value,
+ pAlarm->delta, &overflow);
+ } while (!overflow &&
+ (*paTrigger->CheckTrigger)(paTrigger,
+ paTrigger->pCounter->value));
+
+ new_test_value = paTrigger->test_value;
+ paTrigger->test_value = oldvalue;
+
+ /* "If this update would cause value to fall outside the range
+ * for an INT64...no change is made to value (test-value) and
+ * the alarm state is changed to Inactive before the event is
+ * generated."
+ */
+ if (overflow)
+ {
+ new_test_value = oldvalue;
+ pAlarm->state = XSyncAlarmInactive;
+ }
+ }
+ /* The AlarmNotify event has to have the "new state of the alarm"
+ * which we can't be sure of until this point. However, it has
+ * to have the "old" trigger test value. That's the reason for
+ * all the newvalue/oldvalue shuffling above. After we send the
+ * events, give the trigger its new test value.
+ */
+ SyncSendAlarmNotifyEvents(pAlarm);
+ pTrigger->test_value = new_test_value;
+}
+
+
+/* This function is called when an Await unblocks, either as a result
+ * of the trigger firing OR the counter being destroyed.
+ * It goes into pTrigger->TriggerFired AND pTrigger->CounterDestroyed
+ * (for Await triggers).
+ */
+static void
+SyncAwaitTriggerFired(SyncTrigger *pTrigger)
+{
+ SyncAwait *pAwait = (SyncAwait *)pTrigger;
+ int numwaits;
+ SyncAwaitUnion *pAwaitUnion;
+ SyncAwait **ppAwait;
+ int num_events = 0;
+
+ pAwaitUnion = (SyncAwaitUnion *)pAwait->pHeader;
+ numwaits = pAwaitUnion->header.num_waitconditions;
+ ppAwait = malloc(numwaits * sizeof(SyncAwait *));
+ if (!ppAwait)
+ goto bail;
+
+ pAwait = &(pAwaitUnion+1)->await;
+
+ /* "When a client is unblocked, all the CounterNotify events for
+ * the Await request are generated contiguously. If count is 0
+ * there are no more events to follow for this request. If
+ * count is n, there are at least n more events to follow."
+ *
+ * Thus, it is best to find all the counters for which events
+ * need to be sent first, so that an accurate count field can
+ * be stored in the events.
+ */
+ for ( ; numwaits; numwaits--, pAwait++)
+ {
+ CARD64 diff;
+ Bool overflow, diffgreater, diffequal;
+
+ /* "A CounterNotify event with the destroyed flag set to TRUE is
+ * always generated if the counter for one of the triggers is
+ * destroyed."
+ */
+ if (pAwait->trigger.pCounter->beingDestroyed)
+ {
+ ppAwait[num_events++] = pAwait;
+ continue;
+ }
+
+ /* "The difference between the counter and the test value is
+ * calculated by subtracting the test value from the value of
+ * the counter."
+ */
+ XSyncValueSubtract(&diff, pAwait->trigger.pCounter->value,
+ pAwait->trigger.test_value, &overflow);
+
+ /* "If the difference lies outside the range for an INT64, an
+ * event is not generated."
+ */
+ if (overflow)
+ continue;
+ diffgreater = XSyncValueGreaterThan(diff, pAwait->event_threshold);
+ diffequal = XSyncValueEqual(diff, pAwait->event_threshold);
+
+ /* "If the test-type is PositiveTransition or
+ * PositiveComparison, a CounterNotify event is generated if
+ * the difference is at least event-threshold. If the test-type
+ * is NegativeTransition or NegativeComparison, a CounterNotify
+ * event is generated if the difference is at most
+ * event-threshold."
+ */
+
+ if ( ((pAwait->trigger.test_type == XSyncPositiveComparison ||
+ pAwait->trigger.test_type == XSyncPositiveTransition)
+ && (diffgreater || diffequal))
+ ||
+ ((pAwait->trigger.test_type == XSyncNegativeComparison ||
+ pAwait->trigger.test_type == XSyncNegativeTransition)
+ && (!diffgreater) /* less or equal */
+ )
+ )
+ {
+ ppAwait[num_events++] = pAwait;
+ }
+ }
+ if (num_events)
+ SyncSendCounterNotifyEvents(pAwaitUnion->header.client, ppAwait,
+ num_events);
+ free(ppAwait);
+
+bail:
+ /* unblock the client */
+ AttendClient(pAwaitUnion->header.client);
+ /* delete the await */
+ FreeResource(pAwaitUnion->header.delete_id, RT_NONE);
+}
+
+
+/* This function should always be used to change a counter's value so that
+ * any triggers depending on the counter will be checked.
+ */
+void
+SyncChangeCounter(SyncCounter *pCounter, CARD64 newval)
+{
+ SyncTriggerList *ptl, *pnext;
+ CARD64 oldval;
+
+ oldval = pCounter->value;
+ pCounter->value = newval;
+
+ /* run through triggers to see if any become true */
+ for (ptl = pCounter->pTriglist; ptl; ptl = pnext)
+ {
+ pnext = ptl->next;
+ if ((*ptl->pTrigger->CheckTrigger)(ptl->pTrigger, oldval))
+ (*ptl->pTrigger->TriggerFired)(ptl->pTrigger);
+ }
+
+ if (IsSystemCounter(pCounter))
+ {
+ SyncComputeBracketValues(pCounter);
+ }
+}
+
+
+/* loosely based on dix/events.c/EventSelectForWindow */
+static Bool
+SyncEventSelectForAlarm(SyncAlarm *pAlarm, ClientPtr client, Bool wantevents)
+{
+ SyncAlarmClientList *pClients;
+
+ if (client == pAlarm->client) /* alarm owner */
+ {
+ pAlarm->events = wantevents;
+ return Success;
+ }
+
+ /* see if the client is already on the list (has events selected) */
+
+ for (pClients = pAlarm->pEventClients; pClients;
+ pClients = pClients->next)
+ {
+ if (pClients->client == client)
+ {
+ /* client's presence on the list indicates desire for
+ * events. If the client doesn't want events, remove it
+ * from the list. If the client does want events, do
+ * nothing, since it's already got them.
+ */
+ if (!wantevents)
+ {
+ FreeResource(pClients->delete_id, RT_NONE);
+ }
+ return Success;
+ }
+ }
+
+ /* if we get here, this client does not currently have
+ * events selected on the alarm
+ */
+
+ if (!wantevents)
+ /* client doesn't want events, and we just discovered that it
+ * doesn't have them, so there's nothing to do.
+ */
+ return Success;
+
+ /* add new client to pAlarm->pEventClients */
+
+ pClients = malloc(sizeof(SyncAlarmClientList));
+ if (!pClients)
+ return BadAlloc;
+
+ /* register it as a resource so it will be cleaned up
+ * if the client dies
+ */
+
+ pClients->delete_id = FakeClientID(client->index);
+ if (!AddResource(pClients->delete_id, RTAlarmClient, pAlarm))
+ {
+ free(pClients);
+ return BadAlloc;
+ }
+
+ /* link it into list after we know all the allocations succeed */
+
+ pClients->next = pAlarm->pEventClients;
+ pAlarm->pEventClients = pClients;
+ pClients->client = client;
+ return Success;
+}
+
+/*
+ * ** SyncChangeAlarmAttributes ** This is used by CreateAlarm and ChangeAlarm
+ */
+static int
+SyncChangeAlarmAttributes(ClientPtr client, SyncAlarm *pAlarm, Mask mask,
+ CARD32 *values)
+{
+ int status;
+ XSyncCounter counter;
+ Mask origmask = mask;
+
+ counter = pAlarm->trigger.pCounter ? pAlarm->trigger.pCounter->id : None;
+
+ while (mask)
+ {
+ int index2 = lowbit(mask);
+ mask &= ~index2;
+ switch (index2)
+ {
+ case XSyncCACounter:
+ mask &= ~XSyncCACounter;
+ /* sanity check in SyncInitTrigger */
+ counter = *values++;
+ break;
+
+ case XSyncCAValueType:
+ mask &= ~XSyncCAValueType;
+ /* sanity check in SyncInitTrigger */
+ pAlarm->trigger.value_type = *values++;
+ break;
+
+ case XSyncCAValue:
+ mask &= ~XSyncCAValue;
+ XSyncIntsToValue(&pAlarm->trigger.wait_value, values[1], values[0]);
+ values += 2;
+ break;
+
+ case XSyncCATestType:
+ mask &= ~XSyncCATestType;
+ /* sanity check in SyncInitTrigger */
+ pAlarm->trigger.test_type = *values++;
+ break;
+
+ case XSyncCADelta:
+ mask &= ~XSyncCADelta;
+ XSyncIntsToValue(&pAlarm->delta, values[1], values[0]);
+ values += 2;
+ break;
+
+ case XSyncCAEvents:
+ mask &= ~XSyncCAEvents;
+ if ((*values != xTrue) && (*values != xFalse))
+ {
+ client->errorValue = *values;
+ return BadValue;
+ }
+ status = SyncEventSelectForAlarm(pAlarm, client,
+ (Bool)(*values++));
+ if (status != Success)
+ return status;
+ break;
+
+ default:
+ client->errorValue = mask;
+ return BadValue;
+ }
+ }
+
+ /* "If the test-type is PositiveComparison or PositiveTransition
+ * and delta is less than zero, or if the test-type is
+ * NegativeComparison or NegativeTransition and delta is
+ * greater than zero, a Match error is generated."
+ */
+ if (origmask & (XSyncCADelta|XSyncCATestType))
+ {
+ CARD64 zero;
+ XSyncIntToValue(&zero, 0);
+ if ((((pAlarm->trigger.test_type == XSyncPositiveComparison) ||
+ (pAlarm->trigger.test_type == XSyncPositiveTransition))
+ && XSyncValueLessThan(pAlarm->delta, zero))
+ ||
+ (((pAlarm->trigger.test_type == XSyncNegativeComparison) ||
+ (pAlarm->trigger.test_type == XSyncNegativeTransition))
+ && XSyncValueGreaterThan(pAlarm->delta, zero))
+ )
+ {
+ return BadMatch;
+ }
+ }
+
+ /* postpone this until now, when we're sure nothing else can go wrong */
+ if ((status = SyncInitTrigger(client, &pAlarm->trigger, counter,
+ origmask & XSyncCAAllTrigger)) != Success)
+ return status;
+
+ /* XXX spec does not really say to do this - needs clarification */
+ pAlarm->state = XSyncAlarmActive;
+ return Success;
+}
+
+
+static SyncCounter *
+SyncCreateCounter(ClientPtr client, XSyncCounter id, CARD64 initialvalue)
+{
+ SyncCounter *pCounter;
+
+ if (!(pCounter = malloc(sizeof(SyncCounter))))
+ return NULL;
+
+ if (!AddResource(id, RTCounter, (pointer) pCounter))
+ {
+ free(pCounter);
+ return NULL;
+ }
+
+ pCounter->client = client;
+ pCounter->id = id;
+ pCounter->value = initialvalue;
+ pCounter->pTriglist = NULL;
+ pCounter->beingDestroyed = FALSE;
+ pCounter->pSysCounterInfo = NULL;
+ return pCounter;
+}
+
+static int FreeCounter(void *, XID);
+
+/*
+ * ***** System Counter utilities
+ */
+
+pointer
+SyncCreateSystemCounter(
+ char *name,
+ CARD64 initial,
+ CARD64 resolution,
+ SyncCounterType counterType,
+ void (*QueryValue)(pointer /* pCounter */,
+ CARD64 * /* pValue_return */),
+ void (*BracketValues)(pointer /* pCounter */,
+ CARD64 * /* pbracket_less */,
+ CARD64 * /* pbracket_greater */)
+ )
+{
+ SyncCounter *pCounter;
+
+ SysCounterList = realloc(SysCounterList,
+ (SyncNumSystemCounters+1)*sizeof(SyncCounter *));
+ if (!SysCounterList)
+ return NULL;
+
+ /* this function may be called before SYNC has been initialized, so we
+ * have to make sure RTCounter is created.
+ */
+ if (RTCounter == 0)
+ {
+ RTCounter = CreateNewResourceType(FreeCounter, "SyncCounter");
+ if (RTCounter == 0)
+ {
+ return NULL;
+ }
+ }
+
+ pCounter = SyncCreateCounter(NULL, FakeClientID(0), initial);
+
+ if (pCounter)
+ {
+ SysCounterInfo *psci;
+
+ psci = malloc(sizeof(SysCounterInfo));
+ if (!psci)
+ {
+ FreeResource(pCounter->id, RT_NONE);
+ return pCounter;
+ }
+ pCounter->pSysCounterInfo = psci;
+ psci->name = name;
+ psci->resolution = resolution;
+ psci->counterType = counterType;
+ psci->QueryValue = QueryValue;
+ psci->BracketValues = BracketValues;
+ XSyncMaxValue(&psci->bracket_greater);
+ XSyncMinValue(&psci->bracket_less);
+ SysCounterList[SyncNumSystemCounters++] = pCounter;
+ }
+ return pCounter;
+}
+
+void
+SyncDestroySystemCounter(pointer pSysCounter)
+{
+ SyncCounter *pCounter = (SyncCounter *)pSysCounter;
+ FreeResource(pCounter->id, RT_NONE);
+}
+
+static void
+SyncComputeBracketValues(SyncCounter *pCounter)
+{
+ SyncTriggerList *pCur;
+ SyncTrigger *pTrigger;
+ SysCounterInfo *psci;
+ CARD64 *pnewgtval = NULL;
+ CARD64 *pnewltval = NULL;
+ SyncCounterType ct;
+
+ if (!pCounter)
+ return;
+
+ psci = pCounter->pSysCounterInfo;
+ ct = pCounter->pSysCounterInfo->counterType;
+ if (ct == XSyncCounterNeverChanges)
+ return;
+
+ XSyncMaxValue(&psci->bracket_greater);
+ XSyncMinValue(&psci->bracket_less);
+
+ for (pCur = pCounter->pTriglist; pCur; pCur = pCur->next)
+ {
+ pTrigger = pCur->pTrigger;
+
+ if (pTrigger->test_type == XSyncPositiveComparison &&
+ ct != XSyncCounterNeverIncreases)
+ {
+ if (XSyncValueLessThan(pCounter->value, pTrigger->test_value) &&
+ XSyncValueLessThan(pTrigger->test_value,
+ psci->bracket_greater))
+ {
+ psci->bracket_greater = pTrigger->test_value;
+ pnewgtval = &psci->bracket_greater;
+ }
+ }
+ else if (pTrigger->test_type == XSyncNegativeComparison &&
+ ct != XSyncCounterNeverDecreases)
+ {
+ if (XSyncValueGreaterThan(pCounter->value, pTrigger->test_value) &&
+ XSyncValueGreaterThan(pTrigger->test_value,
+ psci->bracket_less))
+ {
+ psci->bracket_less = pTrigger->test_value;
+ pnewltval = &psci->bracket_less;
+ }
+ }
+ else if (pTrigger->test_type == XSyncNegativeTransition &&
+ ct != XSyncCounterNeverIncreases)
+ {
+ if (XSyncValueGreaterThan(pCounter->value, pTrigger->test_value) &&
+ XSyncValueGreaterThan(pTrigger->test_value, psci->bracket_less))
+ {
+ psci->bracket_less = pTrigger->test_value;
+ pnewltval = &psci->bracket_less;
+ }
+ }
+ else if (pTrigger->test_type == XSyncPositiveTransition &&
+ ct != XSyncCounterNeverDecreases)
+ {
+ if (XSyncValueLessThan(pCounter->value, pTrigger->test_value) &&
+ XSyncValueLessThan(pTrigger->test_value, psci->bracket_greater))
+ {
+ psci->bracket_greater = pTrigger->test_value;
+ pnewgtval = &psci->bracket_greater;
+ }
+ }
+ } /* end for each trigger */
+
+ if (pnewgtval || pnewltval)
+ {
+ (*psci->BracketValues)((pointer)pCounter, pnewltval, pnewgtval);
+ }
+}
+
+/*
+ * ***** Resource delete functions
+ */
+
+/* ARGSUSED */
+static int
+FreeAlarm(void *addr, XID id)
+{
+ SyncAlarm *pAlarm = (SyncAlarm *) addr;
+
+ pAlarm->state = XSyncAlarmDestroyed;
+
+ SyncSendAlarmNotifyEvents(pAlarm);
+
+ /* delete event selections */
+
+ while (pAlarm->pEventClients)
+ FreeResource(pAlarm->pEventClients->delete_id, RT_NONE);
+
+ SyncDeleteTriggerFromCounter(&pAlarm->trigger);
+
+ free(pAlarm);
+ return Success;
+}
+
+
+/*
+ * ** Cleanup after the destruction of a Counter
+ */
+/* ARGSUSED */
+static int
+FreeCounter(void *env, XID id)
+{
+ SyncCounter *pCounter = (SyncCounter *) env;
+ SyncTriggerList *ptl, *pnext;
+
+ pCounter->beingDestroyed = TRUE;
+ /* tell all the counter's triggers that the counter has been destroyed */
+ for (ptl = pCounter->pTriglist; ptl; ptl = pnext)
+ {
+ (*ptl->pTrigger->CounterDestroyed)(ptl->pTrigger);
+ pnext = ptl->next;
+ free(ptl); /* destroy the trigger list as we go */
+ }
+ if (IsSystemCounter(pCounter))
+ {
+ int i, found = 0;
+
+ free(pCounter->pSysCounterInfo);
+
+ /* find the counter in the list of system counters and remove it */
+
+ if (SysCounterList)
+ {
+ for (i = 0; i < SyncNumSystemCounters; i++)
+ {
+ if (SysCounterList[i] == pCounter)
+ {
+ found = i;
+ break;
+ }
+ }
+ if (found < (SyncNumSystemCounters-1))
+ {
+ for (i = found; i < SyncNumSystemCounters-1; i++)
+ {
+ SysCounterList[i] = SysCounterList[i+1];
+ }
+ }
+ }
+ SyncNumSystemCounters--;
+ }
+ free(pCounter);
+ return Success;
+}
+
+/*
+ * ** Cleanup after Await
+ */
+/* ARGSUSED */
+static int
+FreeAwait(void *addr, XID id)
+{
+ SyncAwaitUnion *pAwaitUnion = (SyncAwaitUnion *) addr;
+ SyncAwait *pAwait;
+ int numwaits;
+
+ pAwait = &(pAwaitUnion+1)->await; /* first await on list */
+
+ /* remove triggers from counters */
+
+ for (numwaits = pAwaitUnion->header.num_waitconditions; numwaits;
+ numwaits--, pAwait++)
+ {
+ /* If the counter is being destroyed, FreeCounter will delete
+ * the trigger list itself, so don't do it here.
+ */
+ SyncCounter *pCounter = pAwait->trigger.pCounter;
+ if (pCounter && !pCounter->beingDestroyed)
+ SyncDeleteTriggerFromCounter(&pAwait->trigger);
+ }
+ free(pAwaitUnion);
+ return Success;
+}
+
+/* loosely based on dix/events.c/OtherClientGone */
+static int
+FreeAlarmClient(void *value, XID id)
+{
+ SyncAlarm *pAlarm = (SyncAlarm *)value;
+ SyncAlarmClientList *pCur, *pPrev;
+
+ for (pPrev = NULL, pCur = pAlarm->pEventClients;
+ pCur;
+ pPrev = pCur, pCur = pCur->next)
+ {
+ if (pCur->delete_id == id)
+ {
+ if (pPrev)
+ pPrev->next = pCur->next;
+ else
+ pAlarm->pEventClients = pCur->next;
+ free(pCur);
+ return Success;
+ }
+ }
+ FatalError("alarm client not on event list");
+ /*NOTREACHED*/
+}
+
+
+/*
+ * ***** Proc functions
+ */
+
+
+/*
+ * ** Initialize the extension
+ */
+static int
+ProcSyncInitialize(ClientPtr client)
+{
+ xSyncInitializeReply rep;
+ int n;
+
+ REQUEST_SIZE_MATCH(xSyncInitializeReq);
+
+ memset(&rep, 0, sizeof(xSyncInitializeReply));
+ rep.type = X_Reply;
+ rep.sequenceNumber = client->sequence;
+ rep.majorVersion = SYNC_MAJOR_VERSION;
+ rep.minorVersion = SYNC_MINOR_VERSION;
+ rep.length = 0;
+
+ if (client->swapped)
+ {
+ swaps(&rep.sequenceNumber, n);
+ }
+ WriteToClient(client, sizeof(rep), (char *) &rep);
+ return Success;
+}
+
+/*
+ * ** Get list of system counters available through the extension
+ */
+static int
+ProcSyncListSystemCounters(ClientPtr client)
+{
+ xSyncListSystemCountersReply rep;
+ int i, len;
+ xSyncSystemCounter *list = NULL, *walklist = NULL;
+
+ REQUEST_SIZE_MATCH(xSyncListSystemCountersReq);
+
+ rep.type = X_Reply;
+ rep.sequenceNumber = client->sequence;
+ rep.nCounters = SyncNumSystemCounters;
+
+ for (i = len = 0; i < SyncNumSystemCounters; i++)
+ {
+ char *name = SysCounterList[i]->pSysCounterInfo->name;
+ /* pad to 4 byte boundary */
+ len += pad_to_int32(sz_xSyncSystemCounter + strlen(name));
+ }
+
+ if (len)
+ {
+ walklist = list = malloc(len);
+ if (!list)
+ return BadAlloc;
+ }
+
+ rep.length = bytes_to_int32(len);
+
+ if (client->swapped)
+ {
+ char n;
+ swaps(&rep.sequenceNumber, n);
+ swapl(&rep.length, n);
+ swapl(&rep.nCounters, n);
+ }
+
+ for (i = 0; i < SyncNumSystemCounters; i++)
+ {
+ int namelen;
+ char *pname_in_reply;
+ SysCounterInfo *psci = SysCounterList[i]->pSysCounterInfo;
+
+ walklist->counter = SysCounterList[i]->id;
+ walklist->resolution_hi = XSyncValueHigh32(psci->resolution);
+ walklist->resolution_lo = XSyncValueLow32(psci->resolution);
+ namelen = strlen(psci->name);
+ walklist->name_length = namelen;
+
+ if (client->swapped)
+ {
+ char n;
+ swapl(&walklist->counter, n);
+ swapl(&walklist->resolution_hi, n);
+ swapl(&walklist->resolution_lo, n);
+ swaps(&walklist->name_length, n);
+ }
+
+ pname_in_reply = ((char *)walklist) + sz_xSyncSystemCounter;
+ strncpy(pname_in_reply, psci->name, namelen);
+ walklist = (xSyncSystemCounter *) (((char *)walklist) +
+ pad_to_int32(sz_xSyncSystemCounter + namelen));
+ }
+
+ WriteToClient(client, sizeof(rep), (char *) &rep);
+ if (len)
+ {
+ WriteToClient(client, len, (char *) list);
+ free(list);
+ }
+
+ return Success;
+}
+
+/*
+ * ** Set client Priority
+ */
+static int
+ProcSyncSetPriority(ClientPtr client)
+{
+ REQUEST(xSyncSetPriorityReq);
+ ClientPtr priorityclient;
+ int rc;
+
+ REQUEST_SIZE_MATCH(xSyncSetPriorityReq);
+
+ if (stuff->id == None)
+ priorityclient = client;
+ else {
+ rc = dixLookupClient(&priorityclient, stuff->id, client,
+ DixSetAttrAccess);
+ if (rc != Success)
+ return rc;
+ }
+
+ if (priorityclient->priority != stuff->priority)
+ {
+ priorityclient->priority = stuff->priority;
+
+ /* The following will force the server back into WaitForSomething
+ * so that the change in this client's priority is immediately
+ * reflected.
+ */
+ isItTimeToYield = TRUE;
+ dispatchException |= DE_PRIORITYCHANGE;
+ }
+ return Success;
+}
+
+/*
+ * ** Get client Priority
+ */
+static int
+ProcSyncGetPriority(ClientPtr client)
+{
+ REQUEST(xSyncGetPriorityReq);
+ xSyncGetPriorityReply rep;
+ ClientPtr priorityclient;
+ int rc;
+
+ REQUEST_SIZE_MATCH(xSyncGetPriorityReq);
+
+ if (stuff->id == None)
+ priorityclient = client;
+ else {
+ rc = dixLookupClient(&priorityclient, stuff->id, client,
+ DixGetAttrAccess);
+ if (rc != Success)
+ return rc;
+ }
+
+ rep.type = X_Reply;
+ rep.length = 0;
+ rep.sequenceNumber = client->sequence;
+ rep.priority = priorityclient->priority;
+
+ if (client->swapped)
+ {
+ char n;
+ swaps(&rep.sequenceNumber, n);
+ swapl(&rep.priority, n);
+ }
+
+ WriteToClient(client, sizeof(xSyncGetPriorityReply), (char *) &rep);
+
+ return Success;
+}
+
+/*
+ * ** Create a new counter
+ */
+static int
+ProcSyncCreateCounter(ClientPtr client)
+{
+ REQUEST(xSyncCreateCounterReq);
+ CARD64 initial;
+
+ REQUEST_SIZE_MATCH(xSyncCreateCounterReq);
+
+ LEGAL_NEW_RESOURCE(stuff->cid, client);
+
+ XSyncIntsToValue(&initial, stuff->initial_value_lo, stuff->initial_value_hi);
+ if (!SyncCreateCounter(client, stuff->cid, initial))
+ return BadAlloc;
+
+ return Success;
+}
+
+/*
+ * ** Set Counter value
+ */
+static int
+ProcSyncSetCounter(ClientPtr client)
+{
+ REQUEST(xSyncSetCounterReq);
+ SyncCounter *pCounter;
+ CARD64 newvalue;
+ int rc;
+
+ REQUEST_SIZE_MATCH(xSyncSetCounterReq);
+
+ rc = dixLookupResourceByType((pointer *)&pCounter, stuff->cid, RTCounter,
+ client, DixWriteAccess);
+ if (rc != Success)
+ return rc;
+
+ if (IsSystemCounter(pCounter))
+ {
+ client->errorValue = stuff->cid;
+ return BadAccess;
+ }
+
+ XSyncIntsToValue(&newvalue, stuff->value_lo, stuff->value_hi);
+ SyncChangeCounter(pCounter, newvalue);
+ return Success;
+}
+
+/*
+ * ** Change Counter value
+ */
+static int
+ProcSyncChangeCounter(ClientPtr client)
+{
+ REQUEST(xSyncChangeCounterReq);
+ SyncCounter *pCounter;
+ CARD64 newvalue;
+ Bool overflow;
+ int rc;
+
+ REQUEST_SIZE_MATCH(xSyncChangeCounterReq);
+
+ rc = dixLookupResourceByType((pointer *)&pCounter, stuff->cid, RTCounter,
+ client, DixWriteAccess);
+ if (rc != Success)
+ return rc;
+
+ if (IsSystemCounter(pCounter))
+ {
+ client->errorValue = stuff->cid;
+ return BadAccess;
+ }
+
+ XSyncIntsToValue(&newvalue, stuff->value_lo, stuff->value_hi);
+ XSyncValueAdd(&newvalue, pCounter->value, newvalue, &overflow);
+ if (overflow)
+ {
+ /* XXX 64 bit value can't fit in 32 bits; do the best we can */
+ client->errorValue = stuff->value_hi;
+ return BadValue;
+ }
+ SyncChangeCounter(pCounter, newvalue);
+ return Success;
+}
+
+/*
+ * ** Destroy a counter
+ */
+static int
+ProcSyncDestroyCounter(ClientPtr client)
+{
+ REQUEST(xSyncDestroyCounterReq);
+ SyncCounter *pCounter;
+ int rc;
+
+ REQUEST_SIZE_MATCH(xSyncDestroyCounterReq);
+
+ rc = dixLookupResourceByType((pointer *)&pCounter, stuff->counter, RTCounter,
+ client, DixDestroyAccess);
+ if (rc != Success)
+ return rc;
+
+ if (IsSystemCounter(pCounter))
+ {
+ client->errorValue = stuff->counter;
+ return BadAccess;
+ }
+ FreeResource(pCounter->id, RT_NONE);
+ return Success;
+}
+
+
+/*
+ * ** Await
+ */
+static int
+ProcSyncAwait(ClientPtr client)
+{
+ REQUEST(xSyncAwaitReq);
+ int len, items;
+ int i;
+ xSyncWaitCondition *pProtocolWaitConds;
+ SyncAwaitUnion *pAwaitUnion;
+ SyncAwait *pAwait;
+ int status;
+
+ REQUEST_AT_LEAST_SIZE(xSyncAwaitReq);
+
+ len = client->req_len << 2;
+ len -= sz_xSyncAwaitReq;
+ items = len / sz_xSyncWaitCondition;
+
+ if (items * sz_xSyncWaitCondition != len)
+ {
+ return BadLength;
+ }
+ if (items == 0)
+ {
+ client->errorValue = items; /* XXX protocol change */
+ return BadValue;
+ }
+
+ pProtocolWaitConds = (xSyncWaitCondition *) & stuff[1];
+
+ /* all the memory for the entire await list is allocated
+ * here in one chunk
+ */
+ pAwaitUnion = malloc((items+1) * sizeof(SyncAwaitUnion));
+ if (!pAwaitUnion)
+ return BadAlloc;
+
+ /* first item is the header, remainder are real wait conditions */
+
+ pAwaitUnion->header.delete_id = FakeClientID(client->index);
+ if (!AddResource(pAwaitUnion->header.delete_id, RTAwait, pAwaitUnion))
+ {
+ free(pAwaitUnion);
+ return BadAlloc;
+ }
+
+ /* don't need to do any more memory allocation for this request! */
+
+ pAwaitUnion->header.client = client;
+ pAwaitUnion->header.num_waitconditions = 0;
+
+ pAwait = &(pAwaitUnion+1)->await; /* skip over header */
+ for (i = 0; i < items; i++, pProtocolWaitConds++, pAwait++)
+ {
+ if (pProtocolWaitConds->counter == None) /* XXX protocol change */
+ {
+ /* this should take care of removing any triggers created by
+ * this request that have already been registered on counters
+ */
+ FreeResource(pAwaitUnion->header.delete_id, RT_NONE);
+ client->errorValue = pProtocolWaitConds->counter;
+ return SyncErrorBase + XSyncBadCounter;
+ }
+
+ /* sanity checks are in SyncInitTrigger */
+ pAwait->trigger.pCounter = NULL;
+ pAwait->trigger.value_type = pProtocolWaitConds->value_type;
+ XSyncIntsToValue(&pAwait->trigger.wait_value,
+ pProtocolWaitConds->wait_value_lo,
+ pProtocolWaitConds->wait_value_hi);
+ pAwait->trigger.test_type = pProtocolWaitConds->test_type;
+
+ status = SyncInitTrigger(client, &pAwait->trigger,
+ pProtocolWaitConds->counter, XSyncCAAllTrigger);
+ if (status != Success)
+ {
+ /* this should take care of removing any triggers created by
+ * this request that have already been registered on counters
+ */
+ FreeResource(pAwaitUnion->header.delete_id, RT_NONE);
+ return status;
+ }
+ /* this is not a mistake -- same function works for both cases */
+ pAwait->trigger.TriggerFired = SyncAwaitTriggerFired;
+ pAwait->trigger.CounterDestroyed = SyncAwaitTriggerFired;
+ XSyncIntsToValue(&pAwait->event_threshold,
+ pProtocolWaitConds->event_threshold_lo,
+ pProtocolWaitConds->event_threshold_hi);
+ pAwait->pHeader = &pAwaitUnion->header;
+ pAwaitUnion->header.num_waitconditions++;
+ }
+
+ IgnoreClient(client);
+
+ /* see if any of the triggers are already true */
+
+ pAwait = &(pAwaitUnion+1)->await; /* skip over header */
+ for (i = 0; i < items; i++, pAwait++)
+ {
+ /* don't have to worry about NULL counters because the request
+ * errors before we get here out if they occur
+ */
+ if ((*pAwait->trigger.CheckTrigger)(&pAwait->trigger,
+ pAwait->trigger.pCounter->value))
+ {
+ (*pAwait->trigger.TriggerFired)(&pAwait->trigger);
+ break; /* once is enough */
+ }
+ }
+ return Success;
+}
+
+
+/*
+ * ** Query a counter
+ */
+static int
+ProcSyncQueryCounter(ClientPtr client)
+{
+ REQUEST(xSyncQueryCounterReq);
+ xSyncQueryCounterReply rep;
+ SyncCounter *pCounter;
+ int rc;
+
+ REQUEST_SIZE_MATCH(xSyncQueryCounterReq);
+
+ rc = dixLookupResourceByType((pointer *)&pCounter, stuff->counter,
+ RTCounter, client, DixReadAccess);
+ if (rc != Success)
+ return rc;
+
+ rep.type = X_Reply;
+ rep.length = 0;
+ rep.sequenceNumber = client->sequence;
+
+ /* if system counter, ask it what the current value is */
+
+ if (IsSystemCounter(pCounter))
+ {
+ (*pCounter->pSysCounterInfo->QueryValue) ((pointer) pCounter,
+ &pCounter->value);
+ }
+
+ rep.value_hi = XSyncValueHigh32(pCounter->value);
+ rep.value_lo = XSyncValueLow32(pCounter->value);
+ if (client->swapped)
+ {
+ char n;
+ swaps(&rep.sequenceNumber, n);
+ swapl(&rep.length, n);
+ swapl(&rep.value_hi, n);
+ swapl(&rep.value_lo, n);
+ }
+ WriteToClient(client, sizeof(xSyncQueryCounterReply), (char *) &rep);
+ return Success;
+}
+
+
+/*
+ * ** Create Alarm
+ */
+static int
+ProcSyncCreateAlarm(ClientPtr client)
+{
+ REQUEST(xSyncCreateAlarmReq);
+ SyncAlarm *pAlarm;
+ int status;
+ unsigned long len, vmask;
+ SyncTrigger *pTrigger;
+
+ REQUEST_AT_LEAST_SIZE(xSyncCreateAlarmReq);
+
+ LEGAL_NEW_RESOURCE(stuff->id, client);
+
+ vmask = stuff->valueMask;
+ len = client->req_len - bytes_to_int32(sizeof(xSyncCreateAlarmReq));
+ /* the "extra" call to Ones accounts for the presence of 64 bit values */
+ if (len != (Ones(vmask) + Ones(vmask & (XSyncCAValue|XSyncCADelta))))
+ return BadLength;
+
+ if (!(pAlarm = malloc(sizeof(SyncAlarm))))
+ {
+ return BadAlloc;
+ }
+
+ /* set up defaults */
+
+ pTrigger = &pAlarm->trigger;
+ pTrigger->pCounter = NULL;
+ pTrigger->value_type = XSyncAbsolute;
+ XSyncIntToValue(&pTrigger->wait_value, 0L);
+ pTrigger->test_type = XSyncPositiveComparison;
+ pTrigger->TriggerFired = SyncAlarmTriggerFired;
+ pTrigger->CounterDestroyed = SyncAlarmCounterDestroyed;
+ status = SyncInitTrigger(client, pTrigger, None, XSyncCAAllTrigger);
+ if (status != Success)
+ {
+ free(pAlarm);
+ return status;
+ }
+
+ pAlarm->client = client;
+ pAlarm->alarm_id = stuff->id;
+ XSyncIntToValue(&pAlarm->delta, 1L);
+ pAlarm->events = TRUE;
+ pAlarm->state = XSyncAlarmInactive;
+ pAlarm->pEventClients = NULL;
+ status = SyncChangeAlarmAttributes(client, pAlarm, vmask,
+ (CARD32 *)&stuff[1]);
+ if (status != Success)
+ {
+ free(pAlarm);
+ return status;
+ }
+
+ if (!AddResource(stuff->id, RTAlarm, pAlarm))
+ {
+ free(pAlarm);
+ return BadAlloc;
+ }
+
+ /* see if alarm already triggered. NULL counter will not trigger
+ * in CreateAlarm and sets alarm state to Inactive.
+ */
+
+ if (!pTrigger->pCounter)
+ {
+ pAlarm->state = XSyncAlarmInactive; /* XXX protocol change */
+ }
+ else if ((*pTrigger->CheckTrigger)(pTrigger, pTrigger->pCounter->value))
+ {
+ (*pTrigger->TriggerFired)(pTrigger);
+ }
+
+ return Success;
+}
+
+/*
+ * ** Change Alarm
+ */
+static int
+ProcSyncChangeAlarm(ClientPtr client)
+{
+ REQUEST(xSyncChangeAlarmReq);
+ SyncAlarm *pAlarm;
+ long vmask;
+ int len, status;
+
+ REQUEST_AT_LEAST_SIZE(xSyncChangeAlarmReq);
+
+ status = dixLookupResourceByType((pointer *)&pAlarm, stuff->alarm, RTAlarm,
+ client, DixWriteAccess);
+ if (status != Success)
+ return status;
+
+ vmask = stuff->valueMask;
+ len = client->req_len - bytes_to_int32(sizeof(xSyncChangeAlarmReq));
+ /* the "extra" call to Ones accounts for the presence of 64 bit values */
+ if (len != (Ones(vmask) + Ones(vmask & (XSyncCAValue|XSyncCADelta))))
+ return BadLength;
+
+ if ((status = SyncChangeAlarmAttributes(client, pAlarm, vmask,
+ (CARD32 *)&stuff[1])) != Success)
+ return status;
+
+ /* see if alarm already triggered. NULL counter WILL trigger
+ * in ChangeAlarm.
+ */
+
+ if (!pAlarm->trigger.pCounter ||
+ (*pAlarm->trigger.CheckTrigger)(&pAlarm->trigger,
+ pAlarm->trigger.pCounter->value))
+ {
+ (*pAlarm->trigger.TriggerFired)(&pAlarm->trigger);
+ }
+ return Success;
+}
+
+static int
+ProcSyncQueryAlarm(ClientPtr client)
+{
+ REQUEST(xSyncQueryAlarmReq);
+ SyncAlarm *pAlarm;
+ xSyncQueryAlarmReply rep;
+ SyncTrigger *pTrigger;
+ int rc;
+
+ REQUEST_SIZE_MATCH(xSyncQueryAlarmReq);
+
+ rc = dixLookupResourceByType((pointer *)&pAlarm, stuff->alarm, RTAlarm,
+ client, DixReadAccess);
+ if (rc != Success)
+ return rc;
+
+ rep.type = X_Reply;
+ rep.length = bytes_to_int32(sizeof(xSyncQueryAlarmReply) - sizeof(xGenericReply));
+ rep.sequenceNumber = client->sequence;
+
+ pTrigger = &pAlarm->trigger;
+ rep.counter = (pTrigger->pCounter) ? pTrigger->pCounter->id : None;
+
+#if 0 /* XXX unclear what to do, depends on whether relative value-types
+ * are "consumed" immediately and are considered absolute from then
+ * on.
+ */
+ rep.value_type = pTrigger->value_type;
+ rep.wait_value_hi = XSyncValueHigh32(pTrigger->wait_value);
+ rep.wait_value_lo = XSyncValueLow32(pTrigger->wait_value);
+#else
+ rep.value_type = XSyncAbsolute;
+ rep.wait_value_hi = XSyncValueHigh32(pTrigger->test_value);
+ rep.wait_value_lo = XSyncValueLow32(pTrigger->test_value);
+#endif
+
+ rep.test_type = pTrigger->test_type;
+ rep.delta_hi = XSyncValueHigh32(pAlarm->delta);
+ rep.delta_lo = XSyncValueLow32(pAlarm->delta);
+ rep.events = pAlarm->events;
+ rep.state = pAlarm->state;
+
+ if (client->swapped)
+ {
+ char n;
+ swaps(&rep.sequenceNumber, n);
+ swapl(&rep.length, n);
+ swapl(&rep.counter, n);
+ swapl(&rep.wait_value_hi, n);
+ swapl(&rep.wait_value_lo, n);
+ swapl(&rep.test_type, n);
+ swapl(&rep.delta_hi, n);
+ swapl(&rep.delta_lo, n);
+ }
+
+ WriteToClient(client, sizeof(xSyncQueryAlarmReply), (char *) &rep);
+ return Success;
+}
+
+static int
+ProcSyncDestroyAlarm(ClientPtr client)
+{
+ SyncAlarm *pAlarm;
+ int rc;
+ REQUEST(xSyncDestroyAlarmReq);
+
+ REQUEST_SIZE_MATCH(xSyncDestroyAlarmReq);
+
+ rc = dixLookupResourceByType((pointer *)&pAlarm, stuff->alarm, RTAlarm,
+ client, DixDestroyAccess);
+ if (rc != Success)
+ return rc;
+
+ FreeResource(stuff->alarm, RT_NONE);
+ return Success;
+}
+
+/*
+ * ** Given an extension request, call the appropriate request procedure
+ */
+static int
+ProcSyncDispatch(ClientPtr client)
+{
+ REQUEST(xReq);
+
+ switch (stuff->data)
+ {
+ case X_SyncInitialize:
+ return ProcSyncInitialize(client);
+ case X_SyncListSystemCounters:
+ return ProcSyncListSystemCounters(client);
+ case X_SyncCreateCounter:
+ return ProcSyncCreateCounter(client);
+ case X_SyncSetCounter:
+ return ProcSyncSetCounter(client);
+ case X_SyncChangeCounter:
+ return ProcSyncChangeCounter(client);
+ case X_SyncQueryCounter:
+ return ProcSyncQueryCounter(client);
+ case X_SyncDestroyCounter:
+ return ProcSyncDestroyCounter(client);
+ case X_SyncAwait:
+ return ProcSyncAwait(client);
+ case X_SyncCreateAlarm:
+ return ProcSyncCreateAlarm(client);
+ case X_SyncChangeAlarm:
+ return ProcSyncChangeAlarm(client);
+ case X_SyncQueryAlarm:
+ return ProcSyncQueryAlarm(client);
+ case X_SyncDestroyAlarm:
+ return ProcSyncDestroyAlarm(client);
+ case X_SyncSetPriority:
+ return ProcSyncSetPriority(client);
+ case X_SyncGetPriority:
+ return ProcSyncGetPriority(client);
+ default:
+ return BadRequest;
+ }
+}
+
+/*
+ * Boring Swapping stuff ...
+ */
+
+static int
+SProcSyncInitialize(ClientPtr client)
+{
+ REQUEST(xSyncInitializeReq);
+ char n;
+
+ swaps(&stuff->length, n);
+ REQUEST_SIZE_MATCH (xSyncInitializeReq);
+
+ return ProcSyncInitialize(client);
+}
+
+static int
+SProcSyncListSystemCounters(ClientPtr client)
+{
+ REQUEST(xSyncListSystemCountersReq);
+ char n;
+
+ swaps(&stuff->length, n);
+ REQUEST_SIZE_MATCH (xSyncListSystemCountersReq);
+
+ return ProcSyncListSystemCounters(client);
+}
+
+static int
+SProcSyncCreateCounter(ClientPtr client)
+{
+ REQUEST(xSyncCreateCounterReq);
+ char n;
+
+ swaps(&stuff->length, n);
+ REQUEST_SIZE_MATCH (xSyncCreateCounterReq);
+ swapl(&stuff->cid, n);
+ swapl(&stuff->initial_value_lo, n);
+ swapl(&stuff->initial_value_hi, n);
+
+ return ProcSyncCreateCounter(client);
+}
+
+static int
+SProcSyncSetCounter(ClientPtr client)
+{
+ REQUEST(xSyncSetCounterReq);
+ char n;
+
+ swaps(&stuff->length, n);
+ REQUEST_SIZE_MATCH (xSyncSetCounterReq);
+ swapl(&stuff->cid, n);
+ swapl(&stuff->value_lo, n);
+ swapl(&stuff->value_hi, n);
+
+ return ProcSyncSetCounter(client);
+}
+
+static int
+SProcSyncChangeCounter(ClientPtr client)
+{
+ REQUEST(xSyncChangeCounterReq);
+ char n;
+
+ swaps(&stuff->length, n);
+ REQUEST_SIZE_MATCH (xSyncChangeCounterReq);
+ swapl(&stuff->cid, n);
+ swapl(&stuff->value_lo, n);
+ swapl(&stuff->value_hi, n);
+
+ return ProcSyncChangeCounter(client);
+}
+
+static int
+SProcSyncQueryCounter(ClientPtr client)
+{
+ REQUEST(xSyncQueryCounterReq);
+ char n;
+
+ swaps(&stuff->length, n);
+ REQUEST_SIZE_MATCH (xSyncQueryCounterReq);
+ swapl(&stuff->counter, n);
+
+ return ProcSyncQueryCounter(client);
+}
+
+static int
+SProcSyncDestroyCounter(ClientPtr client)
+{
+ REQUEST(xSyncDestroyCounterReq);
+ char n;
+
+ swaps(&stuff->length, n);
+ REQUEST_SIZE_MATCH (xSyncDestroyCounterReq);
+ swapl(&stuff->counter, n);
+
+ return ProcSyncDestroyCounter(client);
+}
+
+static int
+SProcSyncAwait(ClientPtr client)
+{
+ REQUEST(xSyncAwaitReq);
+ char n;
+
+ swaps(&stuff->length, n);
+ REQUEST_AT_LEAST_SIZE(xSyncAwaitReq);
+ SwapRestL(stuff);
+
+ return ProcSyncAwait(client);
+}
+
+static int
+SProcSyncCreateAlarm(ClientPtr client)
+{
+ REQUEST(xSyncCreateAlarmReq);
+ char n;
+
+ swaps(&stuff->length, n);
+ REQUEST_AT_LEAST_SIZE(xSyncCreateAlarmReq);
+ swapl(&stuff->id, n);
+ swapl(&stuff->valueMask, n);
+ SwapRestL(stuff);
+
+ return ProcSyncCreateAlarm(client);
+}
+
+static int
+SProcSyncChangeAlarm(ClientPtr client)
+{
+ REQUEST(xSyncChangeAlarmReq);
+ char n;
+
+ swaps(&stuff->length, n);
+ REQUEST_AT_LEAST_SIZE(xSyncChangeAlarmReq);
+ swapl(&stuff->alarm, n);
+ swapl(&stuff->valueMask, n);
+ SwapRestL(stuff);
+ return ProcSyncChangeAlarm(client);
+}
+
+static int
+SProcSyncQueryAlarm(ClientPtr client)
+{
+ REQUEST(xSyncQueryAlarmReq);
+ char n;
+
+ swaps(&stuff->length, n);
+ REQUEST_SIZE_MATCH (xSyncQueryAlarmReq);
+ swapl(&stuff->alarm, n);
+
+ return ProcSyncQueryAlarm(client);
+}
+
+static int
+SProcSyncDestroyAlarm(ClientPtr client)
+{
+ REQUEST(xSyncDestroyAlarmReq);
+ char n;
+
+ swaps(&stuff->length, n);
+ REQUEST_SIZE_MATCH (xSyncDestroyAlarmReq);
+ swapl(&stuff->alarm, n);
+
+ return ProcSyncDestroyAlarm(client);
+}
+
+static int
+SProcSyncSetPriority(ClientPtr client)
+{
+ REQUEST(xSyncSetPriorityReq);
+ char n;
+
+ swaps(&stuff->length, n);
+ REQUEST_SIZE_MATCH (xSyncSetPriorityReq);
+ swapl(&stuff->id, n);
+ swapl(&stuff->priority, n);
+
+ return ProcSyncSetPriority(client);
+}
+
+static int
+SProcSyncGetPriority(ClientPtr client)
+{
+ REQUEST(xSyncGetPriorityReq);
+ char n;
+
+ swaps(&stuff->length, n);
+ REQUEST_SIZE_MATCH (xSyncGetPriorityReq);
+ swapl(&stuff->id, n);
+
+ return ProcSyncGetPriority(client);
+}
+
+
+static int
+SProcSyncDispatch(ClientPtr client)
+{
+ REQUEST(xReq);
+
+ switch (stuff->data)
+ {
+ case X_SyncInitialize:
+ return SProcSyncInitialize(client);
+ case X_SyncListSystemCounters:
+ return SProcSyncListSystemCounters(client);
+ case X_SyncCreateCounter:
+ return SProcSyncCreateCounter(client);
+ case X_SyncSetCounter:
+ return SProcSyncSetCounter(client);
+ case X_SyncChangeCounter:
+ return SProcSyncChangeCounter(client);
+ case X_SyncQueryCounter:
+ return SProcSyncQueryCounter(client);
+ case X_SyncDestroyCounter:
+ return SProcSyncDestroyCounter(client);
+ case X_SyncAwait:
+ return SProcSyncAwait(client);
+ case X_SyncCreateAlarm:
+ return SProcSyncCreateAlarm(client);
+ case X_SyncChangeAlarm:
+ return SProcSyncChangeAlarm(client);
+ case X_SyncQueryAlarm:
+ return SProcSyncQueryAlarm(client);
+ case X_SyncDestroyAlarm:
+ return SProcSyncDestroyAlarm(client);
+ case X_SyncSetPriority:
+ return SProcSyncSetPriority(client);
+ case X_SyncGetPriority:
+ return SProcSyncGetPriority(client);
+ default:
+ return BadRequest;
+ }
+}
+
+/*
+ * Event Swapping
+ */
+
+static void
+SCounterNotifyEvent(xSyncCounterNotifyEvent *from, xSyncCounterNotifyEvent *to)
+{
+ to->type = from->type;
+ to->kind = from->kind;
+ cpswaps(from->sequenceNumber, to->sequenceNumber);
+ cpswapl(from->counter, to->counter);
+ cpswapl(from->wait_value_lo, to->wait_value_lo);
+ cpswapl(from->wait_value_hi, to->wait_value_hi);
+ cpswapl(from->counter_value_lo, to->counter_value_lo);
+ cpswapl(from->counter_value_hi, to->counter_value_hi);
+ cpswapl(from->time, to->time);
+ cpswaps(from->count, to->count);
+ to->destroyed = from->destroyed;
+}
+
+
+static void
+SAlarmNotifyEvent(xSyncAlarmNotifyEvent *from, xSyncAlarmNotifyEvent *to)
+{
+ to->type = from->type;
+ to->kind = from->kind;
+ cpswaps(from->sequenceNumber, to->sequenceNumber);
+ cpswapl(from->alarm, to->alarm);
+ cpswapl(from->counter_value_lo, to->counter_value_lo);
+ cpswapl(from->counter_value_hi, to->counter_value_hi);
+ cpswapl(from->alarm_value_lo, to->alarm_value_lo);
+ cpswapl(from->alarm_value_hi, to->alarm_value_hi);
+ cpswapl(from->time, to->time);
+ to->state = from->state;
+}
+
+/*
+ * ** Close everything down. ** This is fairly simple for now.
+ */
+/* ARGSUSED */
+static void
+SyncResetProc(ExtensionEntry *extEntry)
+{
+ free(SysCounterList);
+ SysCounterList = NULL;
+ RTCounter = 0;
+}
+
+
+/*
+ * ** Initialise the extension.
+ */
+void
+SyncExtensionInit(void)
+{
+ ExtensionEntry *extEntry;
+
+ if (RTCounter == 0)
+ {
+ RTCounter = CreateNewResourceType(FreeCounter, "SyncCounter");
+ }
+ RTAlarm = CreateNewResourceType(FreeAlarm, "SyncAlarm");
+ RTAwait = CreateNewResourceType(FreeAwait, "SyncAwait");
+ if (RTAwait)
+ RTAwait |= RC_NEVERRETAIN;
+ RTAlarmClient = CreateNewResourceType(FreeAlarmClient, "SyncAlarmClient");
+ if (RTAlarmClient)
+ RTAlarmClient |= RC_NEVERRETAIN;
+
+ if (RTCounter == 0 || RTAwait == 0 || RTAlarm == 0 ||
+ RTAlarmClient == 0 ||
+ (extEntry = AddExtension(SYNC_NAME,
+ XSyncNumberEvents, XSyncNumberErrors,
+ ProcSyncDispatch, SProcSyncDispatch,
+ SyncResetProc,
+ StandardMinorOpcode)) == NULL)
+ {
+ ErrorF("Sync Extension %d.%d failed to Initialise\n",
+ SYNC_MAJOR_VERSION, SYNC_MINOR_VERSION);
+ return;
+ }
+
+ SyncEventBase = extEntry->eventBase;
+ SyncErrorBase = extEntry->errorBase;
+ EventSwapVector[SyncEventBase + XSyncCounterNotify] = (EventSwapPtr) SCounterNotifyEvent;
+ EventSwapVector[SyncEventBase + XSyncAlarmNotify] = (EventSwapPtr) SAlarmNotifyEvent;
+
+ SetResourceTypeErrorValue(RTCounter, SyncErrorBase + XSyncBadCounter);
+ SetResourceTypeErrorValue(RTAlarm, SyncErrorBase + XSyncBadAlarm);
+
+ /*
+ * Although SERVERTIME is implemented by the OS layer, we initialise it
+ * here because doing it in OsInit() is too early. The resource database
+ * is not initialised when OsInit() is called. This is just about OK
+ * because there is always a servertime counter.
+ */
+ SyncInitServerTime();
+ SyncInitIdleTime();
+
+#ifdef DEBUG
+ fprintf(stderr, "Sync Extension %d.%d\n",
+ SYNC_MAJOR_VERSION, SYNC_MINOR_VERSION);
+#endif
+}
+
+
+/*
+ * ***** SERVERTIME implementation - should go in its own file in OS directory?
+ */
+
+
+
+static pointer ServertimeCounter;
+static XSyncValue Now;
+static XSyncValue *pnext_time;
+
+#define GetTime()\
+{\
+ unsigned long millis = GetTimeInMillis();\
+ unsigned long maxis = XSyncValueHigh32(Now);\
+ if (millis < XSyncValueLow32(Now)) maxis++;\
+ XSyncIntsToValue(&Now, millis, maxis);\
+}
+
+/*
+*** Server Block Handler
+*** code inspired by multibuffer extension (now deprecated)
+ */
+/*ARGSUSED*/
+static void
+ServertimeBlockHandler(void *env, struct timeval **wt, void *LastSelectMask)
+{
+ XSyncValue delay;
+ unsigned long timeout;
+
+ if (pnext_time)
+ {
+ GetTime();
+
+ if (XSyncValueGreaterOrEqual(Now, *pnext_time))
+ {
+ timeout = 0;
+ }
+ else
+ {
+ Bool overflow;
+ XSyncValueSubtract(&delay, *pnext_time, Now, &overflow);
+ (void)overflow;
+ timeout = XSyncValueLow32(delay);
+ }
+ AdjustWaitForDelay(wt, timeout); /* os/utils.c */
+ }
+}
+
+/*
+*** Wakeup Handler
+ */
+/*ARGSUSED*/
+static void
+ServertimeWakeupHandler(void *env, int rc, void *LastSelectMask)
+{
+ if (pnext_time)
+ {
+ GetTime();
+
+ if (XSyncValueGreaterOrEqual(Now, *pnext_time))
+ {
+ SyncChangeCounter(ServertimeCounter, Now);
+ }
+ }
+}
+
+static void
+ServertimeQueryValue(void *pCounter, CARD64 *pValue_return)
+{
+ GetTime();
+ *pValue_return = Now;
+}
+
+static void
+ServertimeBracketValues(void *pCounter, CARD64 *pbracket_less,
+ CARD64 *pbracket_greater)
+{
+ if (!pnext_time && pbracket_greater)
+ {
+ RegisterBlockAndWakeupHandlers(ServertimeBlockHandler,
+ ServertimeWakeupHandler,
+ NULL);
+ }
+ else if (pnext_time && !pbracket_greater)
+ {
+ RemoveBlockAndWakeupHandlers(ServertimeBlockHandler,
+ ServertimeWakeupHandler,
+ NULL);
+ }
+ pnext_time = pbracket_greater;
+}
+
+static void
+SyncInitServerTime(void)
+{
+ CARD64 resolution;
+
+ XSyncIntsToValue(&Now, GetTimeInMillis(), 0);
+ XSyncIntToValue(&resolution, 4);
+ ServertimeCounter = SyncCreateSystemCounter("SERVERTIME", Now, resolution,
+ XSyncCounterNeverDecreases,
+ ServertimeQueryValue, ServertimeBracketValues);
+ pnext_time = NULL;
+}
+
+
+
+/*
+ * IDLETIME implementation
+ */
+
+static SyncCounter *IdleTimeCounter;
+static XSyncValue *pIdleTimeValueLess;
+static XSyncValue *pIdleTimeValueGreater;
+
+static void
+IdleTimeQueryValue (pointer pCounter, CARD64 *pValue_return)
+{
+ CARD32 idle = GetTimeInMillis() - lastDeviceEventTime.milliseconds;
+ XSyncIntsToValue (pValue_return, idle, 0);
+}
+
+static void
+IdleTimeBlockHandler(pointer env, struct timeval **wt, pointer LastSelectMask)
+{
+ XSyncValue idle, old_idle;
+ SyncTriggerList *list = IdleTimeCounter->pTriglist;
+ SyncTrigger *trig;
+
+ if (!pIdleTimeValueLess && !pIdleTimeValueGreater)
+ return;
+
+ old_idle = IdleTimeCounter->value;
+ IdleTimeQueryValue (NULL, &idle);
+ IdleTimeCounter->value = idle; /* push, so CheckTrigger works */
+
+ if (pIdleTimeValueLess &&
+ XSyncValueLessOrEqual (idle, *pIdleTimeValueLess))
+ {
+ /*
+ * We've been idle for less than the threshold value, and someone
+ * wants to know about that, but now we need to know whether they
+ * want level or edge trigger. Check the trigger list against the
+ * current idle time, and if any succeed, bomb out of select()
+ * immediately so we can reschedule.
+ */
+
+ for (list = IdleTimeCounter->pTriglist; list; list = list->next) {
+ trig = list->pTrigger;
+ if (trig->CheckTrigger(trig, old_idle)) {
+ AdjustWaitForDelay(wt, 0);
+ break;
+ }
+ }
+ }
+ else if (pIdleTimeValueGreater)
+ {
+ /*
+ * There's a threshold in the positive direction. If we've been
+ * idle less than it, schedule a wakeup for sometime in the future.
+ * If we've been idle more than it, and someone wants to know about
+ * that level-triggered, schedule an immediate wakeup.
+ */
+ unsigned long timeout = -1;
+
+ if (XSyncValueLessThan (idle, *pIdleTimeValueGreater)) {
+ XSyncValue value;
+ Bool overflow;
+
+ XSyncValueSubtract (&value, *pIdleTimeValueGreater,
+ idle, &overflow);
+ timeout = min(timeout, XSyncValueLow32 (value));
+ } else {
+ for (list = IdleTimeCounter->pTriglist; list; list = list->next) {
+ trig = list->pTrigger;
+ if (trig->CheckTrigger(trig, old_idle)) {
+ timeout = min(timeout, 0);
+ break;
+ }
+ }
+ }
+
+ AdjustWaitForDelay (wt, timeout);
+ }
+
+ IdleTimeCounter->value = old_idle; /* pop */
+}
+
+static void
+IdleTimeWakeupHandler (pointer env, int rc, pointer LastSelectMask)
+{
+ XSyncValue idle;
+
+ if (!pIdleTimeValueLess && !pIdleTimeValueGreater)
+ return;
+
+ IdleTimeQueryValue (NULL, &idle);
+
+ if ((pIdleTimeValueGreater &&
+ XSyncValueGreaterOrEqual (idle, *pIdleTimeValueGreater)) ||
+ (pIdleTimeValueLess &&
+ XSyncValueLessOrEqual (idle, *pIdleTimeValueLess)))
+ {
+ SyncChangeCounter (IdleTimeCounter, idle);
+ }
+}
+
+static void
+IdleTimeBracketValues (pointer pCounter, CARD64 *pbracket_less,
+ CARD64 *pbracket_greater)
+{
+ Bool registered = (pIdleTimeValueLess || pIdleTimeValueGreater);
+
+ if (registered && !pbracket_less && !pbracket_greater)
+ {
+ RemoveBlockAndWakeupHandlers(IdleTimeBlockHandler,
+ IdleTimeWakeupHandler,
+ NULL);
+ }
+ else if (!registered && (pbracket_less || pbracket_greater))
+ {
+ RegisterBlockAndWakeupHandlers(IdleTimeBlockHandler,
+ IdleTimeWakeupHandler,
+ NULL);
+ }
+
+ pIdleTimeValueGreater = pbracket_greater;
+ pIdleTimeValueLess = pbracket_less;
+}
+
+static void
+SyncInitIdleTime (void)
+{
+ CARD64 resolution;
+ XSyncValue idle;
+
+ IdleTimeQueryValue (NULL, &idle);
+ XSyncIntToValue (&resolution, 4);
+
+ IdleTimeCounter = SyncCreateSystemCounter ("IDLETIME", idle, resolution,
+ XSyncCounterUnrestricted,
+ IdleTimeQueryValue,
+ IdleTimeBracketValues);
+
+ pIdleTimeValueLess = pIdleTimeValueGreater = NULL;
+}
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