478 lines
13 KiB
C
478 lines
13 KiB
C
/*
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*
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Copyright 1990, 1998 The Open Group
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Permission to use, copy, modify, distribute, and sell this software and its
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documentation for any purpose is hereby granted without fee, provided that
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the above copyright notice appear in all copies and that both that
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copyright notice and this permission notice appear in supporting
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documentation.
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of The Open Group shall not be
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used in advertising or otherwise to promote the sale, use or other dealings
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in this Software without prior written authorization from The Open Group.
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*
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* Author: Keith Packard, MIT X Consortium
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*/
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/*
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* mieq.c
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*
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* Machine independent event queue
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*
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*/
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#if HAVE_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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# include <X11/X.h>
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# include <X11/Xmd.h>
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# include <X11/Xproto.h>
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# include "misc.h"
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# include "windowstr.h"
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# include "pixmapstr.h"
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# include "inputstr.h"
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# include "mi.h"
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# include "mipointer.h"
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# include "scrnintstr.h"
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# include <X11/extensions/XI.h>
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# include <X11/extensions/XIproto.h>
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# include <X11/extensions/geproto.h>
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# include "extinit.h"
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# include "exglobals.h"
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#ifdef DPMSExtension
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# include "dpmsproc.h"
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# define DPMS_SERVER
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# include <X11/extensions/dpms.h>
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#endif
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#define QUEUE_SIZE 512
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#define EnqueueScreen(dev) dev->spriteInfo->sprite->pEnqueueScreen
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#define DequeueScreen(dev) dev->spriteInfo->sprite->pDequeueScreen
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typedef struct _Event {
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EventListPtr events;
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ScreenPtr pScreen;
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DeviceIntPtr pDev; /* device this event _originated_ from */
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} EventRec, *EventPtr;
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typedef struct _EventQueue {
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HWEventQueueType head, tail; /* long for SetInputCheck */
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CARD32 lastEventTime; /* to avoid time running backwards */
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int lastMotion; /* device ID if last event motion? */
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EventRec events[QUEUE_SIZE]; /* static allocation for signals */
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mieqHandler handlers[128]; /* custom event handler */
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} EventQueueRec, *EventQueuePtr;
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static EventQueueRec miEventQueue;
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static EventListPtr masterEvents; /* for use in mieqProcessInputEvents */
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#ifdef XQUARTZ
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#include <pthread.h>
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static pthread_mutex_t miEventQueueMutex = PTHREAD_MUTEX_INITIALIZER;
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extern BOOL serverInitComplete;
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extern pthread_mutex_t serverInitCompleteMutex;
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extern pthread_cond_t serverInitCompleteCond;
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static inline void wait_for_server_init(void) {
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/* If the server hasn't finished initializing, wait for it... */
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if(!serverInitComplete) {
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pthread_mutex_lock(&serverInitCompleteMutex);
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while(!serverInitComplete)
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pthread_cond_wait(&serverInitCompleteCond, &serverInitCompleteMutex);
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pthread_mutex_unlock(&serverInitCompleteMutex);
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}
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}
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#endif
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Bool
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mieqInit(void)
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{
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int i;
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miEventQueue.head = miEventQueue.tail = 0;
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miEventQueue.lastEventTime = GetTimeInMillis ();
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miEventQueue.lastMotion = FALSE;
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for (i = 0; i < 128; i++)
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miEventQueue.handlers[i] = NULL;
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for (i = 0; i < QUEUE_SIZE; i++)
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{
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EventListPtr evlist = InitEventList(1);
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if (!evlist)
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FatalError("Could not allocate event queue.\n");
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miEventQueue.events[i].events = evlist;
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}
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/* XXX: mE is just 1 event long, if we have Motion + Valuator they are
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* squashed into the first event to make passing it into the event
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* processing handlers easier. This should be fixed when the processing
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* handlers switch to EventListPtr instead of xEvent */
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masterEvents = InitEventList(1);
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if (!masterEvents)
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FatalError("Could not allocated MD event queue.\n");
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SetMinimumEventSize(masterEvents, 1,
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(1 + MAX_VALUATOR_EVENTS) * sizeof(xEvent));
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SetInputCheck(&miEventQueue.head, &miEventQueue.tail);
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return TRUE;
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}
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/* Ensure all events in the EQ are at least size bytes. */
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void
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mieqResizeEvents(int min_size)
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{
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int i;
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for (i = 0; i < QUEUE_SIZE; i++)
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SetMinimumEventSize(miEventQueue.events[i].events, 1, min_size);
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}
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/*
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* Must be reentrant with ProcessInputEvents. Assumption: mieqEnqueue
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* will never be interrupted. If this is called from both signal
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* handlers and regular code, make sure the signal is suspended when
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* called from regular code.
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*/
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void
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mieqEnqueue(DeviceIntPtr pDev, InternalEvent *e)
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{
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unsigned int oldtail = miEventQueue.tail;
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EventListPtr evt;
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int isMotion = 0;
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int evlen;
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Time time;
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#ifdef XQUARTZ
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wait_for_server_init();
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pthread_mutex_lock(&miEventQueueMutex);
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#endif
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CHECKEVENT(e);
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/* avoid merging events from different devices */
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if (e->any.type == ET_Motion)
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isMotion = pDev->id;
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if (isMotion && isMotion == miEventQueue.lastMotion &&
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oldtail != miEventQueue.head) {
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oldtail = (oldtail - 1) % QUEUE_SIZE;
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}
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else {
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static int stuck = 0;
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/* Toss events which come in late. Usually this means your server's
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* stuck in an infinite loop somewhere, but SIGIO is still getting
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* handled. */
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if (((oldtail + 1) % QUEUE_SIZE) == miEventQueue.head) {
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if (!stuck) {
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ErrorF("[mi] EQ overflowing. The server is probably stuck "
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"in an infinite loop.\n");
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xorg_backtrace();
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stuck = 1;
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}
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#ifdef XQUARTZ
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pthread_mutex_unlock(&miEventQueueMutex);
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#endif
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return;
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}
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stuck = 0;
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}
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evlen = e->any.length;
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evt = miEventQueue.events[oldtail].events;
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if (evt->evlen < evlen)
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{
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evt->evlen = evlen;
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evt->event = xrealloc(evt->event, evt->evlen);
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if (!evt->event)
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{
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ErrorF("[mi] Running out of memory. Tossing event.\n");
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#ifdef XQUARTZ
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pthread_mutex_unlock(&miEventQueueMutex);
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#endif
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return;
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}
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}
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memcpy(evt->event, e, evlen);
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time = e->any.time;
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/* Make sure that event times don't go backwards - this
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* is "unnecessary", but very useful. */
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if (time < miEventQueue.lastEventTime &&
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miEventQueue.lastEventTime - time < 10000)
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e->any.time = miEventQueue.lastEventTime;
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miEventQueue.lastEventTime = ((InternalEvent*)evt->event)->any.time;
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miEventQueue.events[oldtail].pScreen = EnqueueScreen(pDev);
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miEventQueue.events[oldtail].pDev = pDev;
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miEventQueue.lastMotion = isMotion;
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miEventQueue.tail = (oldtail + 1) % QUEUE_SIZE;
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#ifdef XQUARTZ
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pthread_mutex_unlock(&miEventQueueMutex);
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#endif
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}
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void
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mieqSwitchScreen(DeviceIntPtr pDev, ScreenPtr pScreen, Bool fromDIX)
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{
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#ifdef XQUARTZ
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pthread_mutex_lock(&miEventQueueMutex);
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#endif
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EnqueueScreen(pDev) = pScreen;
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if (fromDIX)
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DequeueScreen(pDev) = pScreen;
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#ifdef XQUARTZ
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pthread_mutex_unlock(&miEventQueueMutex);
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#endif
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}
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void
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mieqSetHandler(int event, mieqHandler handler)
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{
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#ifdef XQUARTZ
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pthread_mutex_lock(&miEventQueueMutex);
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#endif
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if (handler && miEventQueue.handlers[event])
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ErrorF("[mi] mieq: warning: overriding existing handler %p with %p for "
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"event %d\n", miEventQueue.handlers[event], handler, event);
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miEventQueue.handlers[event] = handler;
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#ifdef XQUARTZ
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pthread_mutex_unlock(&miEventQueueMutex);
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#endif
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}
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/**
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* Change the device id of the given event to the given device's id.
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*/
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static void
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ChangeDeviceID(DeviceIntPtr dev, InternalEvent* event)
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{
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switch(event->any.type)
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{
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case ET_Motion:
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case ET_KeyPress:
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case ET_KeyRelease:
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case ET_ButtonPress:
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case ET_ButtonRelease:
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case ET_ProximityIn:
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case ET_ProximityOut:
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case ET_Hierarchy:
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case ET_DeviceChanged:
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event->device.deviceid = dev->id;
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break;
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case ET_Raw:
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event->raw.deviceid = dev->id;
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break;
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default:
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ErrorF("[mi] Unknown event type (%d), cannot change id.\n",
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event->any.type);
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}
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}
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static void
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FixUpEventForMaster(DeviceIntPtr mdev, DeviceIntPtr sdev,
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InternalEvent* original, InternalEvent *master)
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{
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CHECKEVENT(original);
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CHECKEVENT(master);
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/* Ensure chained button mappings, i.e. that the detail field is the
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* value of the mapped button on the SD, not the physical button */
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if (original->any.type == ET_ButtonPress ||
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original->any.type == ET_ButtonRelease)
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{
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int btn = original->device.detail.button;
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if (!sdev->button)
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return; /* Should never happen */
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master->device.detail.button = sdev->button->map[btn];
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}
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}
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/**
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* Copy the given event into master.
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* @param sdev The slave device the original event comes from
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* @param original The event as it came from the EQ
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* @param master The event after being copied
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* @return The master device or NULL if the device is a floating slave.
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*/
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DeviceIntPtr
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CopyGetMasterEvent(DeviceIntPtr sdev,
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InternalEvent* original, EventListPtr mlist)
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{
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DeviceIntPtr mdev;
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int len = original->any.length;
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InternalEvent *mevent;
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CHECKEVENT(original);
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if (!sdev->u.master)
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return NULL;
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switch(original->any.type)
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{
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case ET_KeyPress:
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case ET_KeyRelease:
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mdev = GetMaster(sdev, MASTER_KEYBOARD);
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break;
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case ET_ButtonPress:
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case ET_ButtonRelease:
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case ET_Motion:
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case ET_ProximityIn:
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case ET_ProximityOut:
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mdev = GetMaster(sdev, MASTER_POINTER);
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break;
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default:
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mdev = sdev->u.master;
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break;
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}
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if (mlist->evlen < len)
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SetMinimumEventSize(mlist, 1, len);
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mevent = (InternalEvent*)mlist->event;
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memcpy(mevent, original, len);
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ChangeDeviceID(mdev, mevent);
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FixUpEventForMaster(mdev, sdev, original, mevent);
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return mdev;
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}
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/**
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* Post the given @event through the device hierarchy, as appropriate.
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* Use this function if an event must be posted for a given device during the
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* usual event processing cycle.
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*/
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void
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mieqProcessDeviceEvent(DeviceIntPtr dev,
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InternalEvent *event,
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ScreenPtr screen)
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{
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mieqHandler handler;
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int x = 0, y = 0;
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DeviceIntPtr master;
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CHECKEVENT(event);
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/* Custom event handler */
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handler = miEventQueue.handlers[event->any.type];
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if (screen && screen != DequeueScreen(dev) && !handler) {
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/* Assumption - screen switching can only occur on motion events. */
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DequeueScreen(dev) = screen;
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x = event->device.root_x;
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y = event->device.root_y;
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NewCurrentScreen (dev, DequeueScreen(dev), x, y);
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}
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else {
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master = CopyGetMasterEvent(dev, event, masterEvents);
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/* If someone's registered a custom event handler, let them
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* steal it. */
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if (handler)
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{
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handler(DequeueScreen(dev)->myNum, event, dev);
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if (master)
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{
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master->u.lastSlave = dev;
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handler(DequeueScreen(master)->myNum,
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(InternalEvent*)masterEvents->event, master);
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}
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} else
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{
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/* process slave first, then master */
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dev->public.processInputProc(event, dev);
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if (master)
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master->public.processInputProc(
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(InternalEvent*)masterEvents->event,
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master);
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}
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}
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}
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/* Call this from ProcessInputEvents(). */
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void
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mieqProcessInputEvents(void)
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{
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EventRec *e = NULL;
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int evlen;
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ScreenPtr screen;
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static InternalEvent *event = NULL;
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static size_t event_size = 0;
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DeviceIntPtr dev = NULL,
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master = NULL;
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#ifdef XQUARTZ
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pthread_mutex_lock(&miEventQueueMutex);
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#endif
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while (miEventQueue.head != miEventQueue.tail) {
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e = &miEventQueue.events[miEventQueue.head];
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evlen = e->events->evlen;
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if(evlen > event_size)
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event = xrealloc(event, evlen);
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if (!event)
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FatalError("[mi] No memory left for event processing.\n");
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memcpy(event, e->events->event, evlen);
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dev = e->pDev;
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screen = e->pScreen;
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miEventQueue.head = (miEventQueue.head + 1) % QUEUE_SIZE;
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#ifdef XQUARTZ
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pthread_mutex_unlock(&miEventQueueMutex);
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#endif
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master = (!IsMaster(dev) && dev->u.master) ? dev->u.master : NULL;
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if (screenIsSaved == SCREEN_SAVER_ON)
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dixSaveScreens (serverClient, SCREEN_SAVER_OFF, ScreenSaverReset);
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#ifdef DPMSExtension
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else if (DPMSPowerLevel != DPMSModeOn)
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SetScreenSaverTimer();
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if (DPMSPowerLevel != DPMSModeOn)
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DPMSSet(serverClient, DPMSModeOn);
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#endif
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mieqProcessDeviceEvent(dev, event, screen);
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/* Update the sprite now. Next event may be from different device. */
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if (event->any.type == ET_Motion && master)
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miPointerUpdateSprite(dev);
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#ifdef XQUARTZ
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pthread_mutex_lock(&miEventQueueMutex);
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#endif
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}
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#ifdef XQUARTZ
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pthread_mutex_unlock(&miEventQueueMutex);
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#endif
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}
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