/* * Copyright 1990, 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. * * Author: Keith Packard, MIT X Consortium */ /* * mieq.c * * Machine independent event queue * */ #if HAVE_DIX_CONFIG_H #include #endif # define NEED_EVENTS # include # include # include # include "misc.h" # include "windowstr.h" # include "pixmapstr.h" # include "inputstr.h" # include "mi.h" # include "mipointer.h" # include "scrnintstr.h" # include # include # include # include "extinit.h" # include "exglobals.h" #ifdef DPMSExtension # include "dpmsproc.h" # include #endif #define QUEUE_SIZE 512 #define EnqueueScreen(dev) dev->spriteInfo->sprite->pEnqueueScreen #define DequeueScreen(dev) dev->spriteInfo->sprite->pDequeueScreen typedef struct _Event { EventListPtr events; int nevents; ScreenPtr pScreen; DeviceIntPtr pDev; /* device this event _originated_ from */ } EventRec, *EventPtr; typedef struct _EventQueue { HWEventQueueType head, tail; /* long for SetInputCheck */ CARD32 lastEventTime; /* to avoid time running backwards */ int lastMotion; /* device ID if last event motion? */ EventRec events[QUEUE_SIZE]; /* static allocation for signals */ mieqHandler handlers[128]; /* custom event handler */ } EventQueueRec, *EventQueuePtr; static EventQueueRec miEventQueue; static EventListPtr masterEvents; /* for use in mieqProcessInputEvents */ #ifdef XQUARTZ #include static pthread_mutex_t miEventQueueMutex = PTHREAD_MUTEX_INITIALIZER; extern BOOL serverInitComplete; extern pthread_mutex_t serverInitCompleteMutex; extern pthread_cond_t serverInitCompleteCond; static inline void wait_for_server_init(void) { /* If the server hasn't finished initializing, wait for it... */ if(!serverInitComplete) { pthread_mutex_lock(&serverInitCompleteMutex); while(!serverInitComplete) pthread_cond_wait(&serverInitCompleteCond, &serverInitCompleteMutex); pthread_mutex_unlock(&serverInitCompleteMutex); } } #endif Bool mieqInit(void) { int i; miEventQueue.head = miEventQueue.tail = 0; miEventQueue.lastEventTime = GetTimeInMillis (); miEventQueue.lastMotion = FALSE; for (i = 0; i < 128; i++) miEventQueue.handlers[i] = NULL; for (i = 0; i < QUEUE_SIZE; i++) { EventListPtr evlist = InitEventList(1 + MAX_VALUATOR_EVENTS); if (!evlist) FatalError("Could not allocate event queue.\n"); miEventQueue.events[i].events = evlist; } /* XXX: mE is just 1 event long, if we have Motion + Valuator they are * squashed into the first event to make passing it into the event * processing handlers easier. This should be fixed when the processing * handlers switch to EventListPtr instead of xEvent */ masterEvents = InitEventList(1); if (!masterEvents) FatalError("Could not allocated MD event queue.\n"); SetMinimumEventSize(masterEvents, 1, (1 + MAX_VALUATOR_EVENTS) * sizeof(xEvent)); SetInputCheck(&miEventQueue.head, &miEventQueue.tail); return TRUE; } /* Ensure all events in the EQ are at least size bytes. */ void mieqResizeEvents(int min_size) { int i; for (i = 0; i < QUEUE_SIZE; i++) SetMinimumEventSize(miEventQueue.events[i].events, 7, min_size); } /* * Must be reentrant with ProcessInputEvents. Assumption: mieqEnqueue * will never be interrupted. If this is called from both signal * handlers and regular code, make sure the signal is suspended when * called from regular code. */ void mieqEnqueue(DeviceIntPtr pDev, xEvent *e) { unsigned int oldtail = miEventQueue.tail; EventListPtr evt; int isMotion = 0; int evlen; #ifdef XQUARTZ wait_for_server_init(); pthread_mutex_lock(&miEventQueueMutex); #endif /* avoid merging events from different devices */ if (e->u.u.type == MotionNotify) isMotion = pDev->id; else if (e->u.u.type == DeviceMotionNotify) isMotion = pDev->id | (1 << 8); /* flag to indicate DeviceMotion */ /* We silently steal valuator events: just tack them on to the last * motion event they need to be attached to. Sigh. */ if (e->u.u.type == DeviceValuator) { deviceValuator *v = (deviceValuator *) e; EventPtr laste; deviceKeyButtonPointer *lastkbp; laste = &miEventQueue.events[(oldtail - 1) % QUEUE_SIZE]; lastkbp = (deviceKeyButtonPointer *) laste->events->event; if (laste->nevents > 6) { #ifdef XQUARTZ pthread_mutex_unlock(&miEventQueueMutex); #endif ErrorF("[mi] mieqEnqueue: more than six valuator events; dropping.\n"); return; } if (oldtail == miEventQueue.head || !(lastkbp->type == DeviceMotionNotify || lastkbp->type == DeviceButtonPress || lastkbp->type == DeviceButtonRelease || lastkbp->type == ProximityIn || lastkbp->type == ProximityOut) || ((lastkbp->deviceid & DEVICE_BITS) != (v->deviceid & DEVICE_BITS))) { #ifdef XQUARTZ pthread_mutex_unlock(&miEventQueueMutex); #endif ErrorF("[mi] mieqEnequeue: out-of-order valuator event; dropping.\n"); return; } memcpy((laste->events[laste->nevents++].event), e, sizeof(xEvent)); #ifdef XQUARTZ pthread_mutex_unlock(&miEventQueueMutex); #endif return; } if (isMotion && isMotion == miEventQueue.lastMotion && oldtail != miEventQueue.head) { oldtail = (oldtail - 1) % QUEUE_SIZE; } else { static int stuck = 0; /* Toss events which come in late. Usually this means your server's * stuck in an infinite loop somewhere, but SIGIO is still getting * handled. */ if (((oldtail + 1) % QUEUE_SIZE) == miEventQueue.head) { ErrorF("[mi] EQ overflowing. The server is probably stuck " "in an infinite loop.\n"); if (!stuck) { xorg_backtrace(); stuck = 1; } #ifdef XQUARTZ pthread_mutex_unlock(&miEventQueueMutex); #endif return; } stuck = 0; } evlen = sizeof(xEvent); if (e->u.u.type == GenericEvent) evlen += ((xGenericEvent*)e)->length * 4; evt = miEventQueue.events[oldtail].events; if (evt->evlen < evlen) { evt->evlen = evlen; evt->event = xrealloc(evt->event, evt->evlen); if (!evt->event) { ErrorF("[mi] Running out of memory. Tossing event.\n"); #ifdef XQUARTZ pthread_mutex_unlock(&miEventQueueMutex); #endif return; } } memcpy(evt->event, e, evlen); miEventQueue.events[oldtail].nevents = 1; /* Make sure that event times don't go backwards - this * is "unnecessary", but very useful. */ if (e->u.u.type != GenericEvent && e->u.keyButtonPointer.time < miEventQueue.lastEventTime && miEventQueue.lastEventTime - e->u.keyButtonPointer.time < 10000) evt->event->u.keyButtonPointer.time = miEventQueue.lastEventTime; miEventQueue.lastEventTime = evt->event->u.keyButtonPointer.time; miEventQueue.events[oldtail].pScreen = EnqueueScreen(pDev); miEventQueue.events[oldtail].pDev = pDev; miEventQueue.lastMotion = isMotion; miEventQueue.tail = (oldtail + 1) % QUEUE_SIZE; #ifdef XQUARTZ pthread_mutex_unlock(&miEventQueueMutex); #endif } void mieqSwitchScreen(DeviceIntPtr pDev, ScreenPtr pScreen, Bool fromDIX) { #ifdef XQUARTZ pthread_mutex_lock(&miEventQueueMutex); #endif EnqueueScreen(pDev) = pScreen; if (fromDIX) DequeueScreen(pDev) = pScreen; #ifdef XQUARTZ pthread_mutex_unlock(&miEventQueueMutex); #endif } void mieqSetHandler(int event, mieqHandler handler) { #ifdef XQUARTZ pthread_mutex_lock(&miEventQueueMutex); #endif if (handler && miEventQueue.handlers[event]) ErrorF("[mi] mieq: warning: overriding existing handler %p with %p for " "event %d\n", miEventQueue.handlers[event], handler, event); miEventQueue.handlers[event] = handler; #ifdef XQUARTZ pthread_mutex_unlock(&miEventQueueMutex); #endif } /** * Change the device id of the given event to the given device's id. */ static void ChangeDeviceID(DeviceIntPtr dev, xEvent* event) { int type = event->u.u.type; if (type == DeviceKeyPress || type == DeviceKeyRelease || type == DeviceButtonPress || type == DeviceButtonRelease || type == DeviceMotionNotify || type == ProximityIn || type == ProximityOut) ((deviceKeyButtonPointer*)event)->deviceid = dev->id; else if (type == DeviceValuator) ((deviceValuator*)event)->deviceid = dev->id; else if (type == GenericEvent) { DebugF("[mi] Unknown generic event (%d/%d), cannot change id.\n", ((xGenericEvent*)event)->extension, ((xGenericEvent*)event)->evtype); } else DebugF("[mi] Unknown event type (%d), cannot change id.\n", type); } static void FixUpEventForMaster(DeviceIntPtr mdev, DeviceIntPtr sdev, xEvent* original, EventListPtr master, int count) { /* Ensure chained button mappings, i.e. that the detail field is the * value of the mapped button on the SD, not the physical button */ if (original->u.u.type == DeviceButtonPress || original->u.u.type == DeviceButtonRelease) { int btn = original->u.u.detail; if (!sdev->button) return; /* Should never happen */ master->event->u.u.detail = sdev->button->map[btn]; } } /** * Copy the given event into master. * @param mdev The master device * @param sdev The slave device the original event comes from * @param original The event as it came from the EQ * @param master The event after being copied * @param count Number of events in original. */ void CopyGetMasterEvent(DeviceIntPtr mdev, DeviceIntPtr sdev, xEvent* original, EventListPtr master, int count) { int len = count * sizeof(xEvent); /* Assumption: GenericEvents always have count 1 */ if (GEV(original)->type == GenericEvent) len += GEV(original)->length * 4; if (master->evlen < len) SetMinimumEventSize(master, 1, len); memcpy(master->event, original, len); while (count--) { ChangeDeviceID(mdev, &master->event[count]); FixUpEventForMaster(mdev, sdev, original, master, count); } } extern void CopyKeyClass(DeviceIntPtr device, DeviceIntPtr master); /* Call this from ProcessInputEvents(). */ void mieqProcessInputEvents(void) { mieqHandler handler; EventRec *e = NULL; int x = 0, y = 0; int type, nevents, evlen, i; ScreenPtr screen; static xEvent *event = NULL; static size_t event_size = 0; DeviceIntPtr dev = NULL, master = NULL; #ifdef XQUARTZ pthread_mutex_lock(&miEventQueueMutex); #endif while (miEventQueue.head != miEventQueue.tail) { e = &miEventQueue.events[miEventQueue.head]; /* GenericEvents always have nevents == 1 */ nevents = e->nevents; evlen = (nevents > 1) ? sizeof(xEvent) : e->events->evlen; if((nevents * evlen) > event_size) { event_size = nevents * evlen; event = (xEvent *)xrealloc(event, event_size); } if (!event) FatalError("[mi] No memory left for event processing.\n"); for (i = 0; i < nevents; i++) memcpy(&event[i], e->events[i].event, evlen); dev = e->pDev; screen = e->pScreen; miEventQueue.head = (miEventQueue.head + 1) % QUEUE_SIZE; #ifdef XQUARTZ pthread_mutex_unlock(&miEventQueueMutex); #endif type = event->u.u.type; master = (!dev->isMaster && dev->u.master) ? dev->u.master : NULL; if (screenIsSaved == SCREEN_SAVER_ON) dixSaveScreens (serverClient, SCREEN_SAVER_OFF, ScreenSaverReset); #ifdef DPMSExtension else if (DPMSPowerLevel != DPMSModeOn) SetScreenSaverTimer(); if (DPMSPowerLevel != DPMSModeOn) DPMSSet(serverClient, DPMSModeOn); #endif /* Custom event handler */ handler = miEventQueue.handlers[type]; if (screen != DequeueScreen(dev) && !handler) { /* Assumption - screen switching can only occur on motion events. */ DequeueScreen(dev) = screen; x = event->u.keyButtonPointer.rootX; y = event->u.keyButtonPointer.rootY; NewCurrentScreen (dev, DequeueScreen(dev), x, y); } else { if (master && dev->coreEvents) { /* Force a copy of the key class into the VCK so that the layout is transferred. */ if (event->u.u.type == DeviceKeyPress || event->u.u.type == DeviceKeyRelease) { if (!master->key) master = GetPairedDevice(master); CopyKeyClass(dev, master); } CopyGetMasterEvent(master, dev, event, masterEvents, nevents); } /* If someone's registered a custom event handler, let them * steal it. */ if (handler) { handler(DequeueScreen(dev)->myNum, event, dev, nevents); if (master) handler(DequeueScreen(master)->myNum, masterEvents->event, master, nevents); } else { /* process slave first, then master */ dev->public.processInputProc(event, dev, nevents); if (master && dev->coreEvents) master->public.processInputProc(masterEvents->event, master, nevents); } } /* Update the sprite now. Next event may be from different device. */ if (type == DeviceMotionNotify && dev->coreEvents) miPointerUpdateSprite(dev); #ifdef XQUARTZ pthread_mutex_lock(&miEventQueueMutex); #endif } #ifdef XQUARTZ pthread_mutex_unlock(&miEventQueueMutex); #endif }