Mercurial > sdl-ios-xcode
annotate src/events/SDL_events.c @ 1226:d05306f0dc21
More dynamic X11 fixes...catches some code in Xlib headers that caused
dependencies...
author | Ryan C. Gordon <icculus@icculus.org> |
---|---|
date | Wed, 04 Jan 2006 22:57:50 +0000 |
parents | 173c063d4f55 |
children | c9b51268668f |
rev | line source |
---|---|
0 | 1 /* |
2 SDL - Simple DirectMedia Layer | |
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Updated copyright information for 2004 (Happy New Year!)
Sam Lantinga <slouken@libsdl.org>
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3 Copyright (C) 1997-2004 Sam Lantinga |
0 | 4 |
5 This library is free software; you can redistribute it and/or | |
6 modify it under the terms of the GNU Library General Public | |
7 License as published by the Free Software Foundation; either | |
8 version 2 of the License, or (at your option) any later version. | |
9 | |
10 This library is distributed in the hope that it will be useful, | |
11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 Library General Public License for more details. | |
14 | |
15 You should have received a copy of the GNU Library General Public | |
16 License along with this library; if not, write to the Free | |
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | |
19 Sam Lantinga | |
252
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Updated the source with the correct e-mail address
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20 slouken@libsdl.org |
0 | 21 */ |
22 | |
23 #ifdef SAVE_RCSID | |
24 static char rcsid = | |
25 "@(#) $Id$"; | |
26 #endif | |
27 | |
28 /* General event handling code for SDL */ | |
29 | |
30 #include <stdio.h> | |
31 #include <string.h> | |
32 | |
33 #include "SDL.h" | |
34 #include "SDL_thread.h" | |
35 #include "SDL_mutex.h" | |
36 #include "SDL_events.h" | |
37 #include "SDL_events_c.h" | |
38 #include "SDL_timer_c.h" | |
39 #ifndef DISABLE_JOYSTICK | |
40 #include "SDL_joystick_c.h" | |
41 #endif | |
42 #ifndef ENABLE_X11 | |
43 #define DISABLE_X11 | |
44 #endif | |
45 #include "SDL_syswm.h" | |
46 #include "SDL_sysevents.h" | |
47 | |
48 /* Public data -- the event filter */ | |
49 SDL_EventFilter SDL_EventOK = NULL; | |
50 Uint8 SDL_ProcessEvents[SDL_NUMEVENTS]; | |
51 static Uint32 SDL_eventstate = 0; | |
52 | |
53 /* Private data -- event queue */ | |
54 #define MAXEVENTS 128 | |
55 static struct { | |
56 SDL_mutex *lock; | |
57 int active; | |
58 int head; | |
59 int tail; | |
60 SDL_Event event[MAXEVENTS]; | |
61 int wmmsg_next; | |
62 struct SDL_SysWMmsg wmmsg[MAXEVENTS]; | |
63 } SDL_EventQ; | |
64 | |
65 /* Private data -- event locking structure */ | |
66 static struct { | |
67 SDL_mutex *lock; | |
68 int safe; | |
69 } SDL_EventLock; | |
70 | |
71 /* Thread functions */ | |
72 static SDL_Thread *SDL_EventThread = NULL; /* Thread handle */ | |
73 static Uint32 event_thread; /* The event thread id */ | |
74 | |
75 void SDL_Lock_EventThread(void) | |
76 { | |
77 if ( SDL_EventThread && (SDL_ThreadID() != event_thread) ) { | |
78 /* Grab lock and spin until we're sure event thread stopped */ | |
79 SDL_mutexP(SDL_EventLock.lock); | |
80 while ( ! SDL_EventLock.safe ) { | |
81 SDL_Delay(1); | |
82 } | |
83 } | |
84 } | |
85 void SDL_Unlock_EventThread(void) | |
86 { | |
87 if ( SDL_EventThread && (SDL_ThreadID() != event_thread) ) { | |
88 SDL_mutexV(SDL_EventLock.lock); | |
89 } | |
90 } | |
91 | |
1190 | 92 #ifdef __OS2__ |
93 /* | |
94 * We'll increase the priority of GobbleEvents thread, so it will process | |
95 * events in time for sure! For this, we need the DosSetPriority() API | |
96 * from the os2.h include file. | |
97 */ | |
98 #define INCL_DOSPROCESS | |
99 #include <os2.h> | |
100 #include <time.h> | |
101 #endif | |
102 | |
0 | 103 static int SDL_GobbleEvents(void *unused) |
104 { | |
105 event_thread = SDL_ThreadID(); | |
1190 | 106 |
107 #ifdef __OS2__ | |
108 #ifdef USE_DOSSETPRIORITY | |
109 /* Increase thread priority, so it will process events in time for sure! */ | |
110 DosSetPriority(PRTYS_THREAD, PRTYC_REGULAR, +16, 0); | |
111 #endif | |
112 #endif | |
113 | |
0 | 114 while ( SDL_EventQ.active ) { |
115 SDL_VideoDevice *video = current_video; | |
116 SDL_VideoDevice *this = current_video; | |
117 | |
118 /* Get events from the video subsystem */ | |
119 if ( video ) { | |
120 video->PumpEvents(this); | |
121 } | |
122 | |
123 /* Queue pending key-repeat events */ | |
124 SDL_CheckKeyRepeat(); | |
125 | |
126 #ifndef DISABLE_JOYSTICK | |
127 /* Check for joystick state change */ | |
128 if ( SDL_numjoysticks && (SDL_eventstate & SDL_JOYEVENTMASK) ) { | |
129 SDL_JoystickUpdate(); | |
130 } | |
131 #endif | |
132 | |
133 /* Give up the CPU for the rest of our timeslice */ | |
134 SDL_EventLock.safe = 1; | |
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Fix various problems with the timer code.
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135 if ( SDL_timer_running ) { |
0 | 136 SDL_ThreadedTimerCheck(); |
137 } | |
138 SDL_Delay(1); | |
139 | |
140 /* Check for event locking. | |
141 On the P of the lock mutex, if the lock is held, this thread | |
142 will wait until the lock is released before continuing. The | |
143 safe flag will be set, meaning that the other thread can go | |
144 about it's business. The safe flag is reset before the V, | |
145 so as soon as the mutex is free, other threads can see that | |
146 it's not safe to interfere with the event thread. | |
147 */ | |
148 SDL_mutexP(SDL_EventLock.lock); | |
149 SDL_EventLock.safe = 0; | |
150 SDL_mutexV(SDL_EventLock.lock); | |
151 } | |
152 SDL_SetTimerThreaded(0); | |
153 event_thread = 0; | |
154 return(0); | |
155 } | |
156 | |
157 static int SDL_StartEventThread(Uint32 flags) | |
158 { | |
159 /* Reset everything to zero */ | |
160 SDL_EventThread = NULL; | |
161 memset(&SDL_EventLock, 0, sizeof(SDL_EventLock)); | |
162 | |
163 /* Create the lock and set ourselves active */ | |
164 #ifndef DISABLE_THREADS | |
165 SDL_EventQ.lock = SDL_CreateMutex(); | |
166 if ( SDL_EventQ.lock == NULL ) { | |
167 #ifdef macintosh /* On MacOS 7/8, you can't multithread, so no lock needed */ | |
168 ; | |
169 #else | |
170 return(-1); | |
171 #endif | |
172 } | |
173 #endif /* !DISABLE_THREADS */ | |
174 SDL_EventQ.active = 1; | |
175 | |
176 if ( (flags&SDL_INIT_EVENTTHREAD) == SDL_INIT_EVENTTHREAD ) { | |
177 SDL_EventLock.lock = SDL_CreateMutex(); | |
178 if ( SDL_EventLock.lock == NULL ) { | |
179 return(-1); | |
180 } | |
181 SDL_EventLock.safe = 0; | |
182 | |
1028
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Fix various problems with the timer code.
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
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183 /* The event thread will handle timers too */ |
5ba65305c954
Fix various problems with the timer code.
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
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184 SDL_SetTimerThreaded(2); |
0 | 185 SDL_EventThread = SDL_CreateThread(SDL_GobbleEvents, NULL); |
186 if ( SDL_EventThread == NULL ) { | |
187 return(-1); | |
188 } | |
189 } else { | |
190 event_thread = 0; | |
191 } | |
192 return(0); | |
193 } | |
194 | |
195 static void SDL_StopEventThread(void) | |
196 { | |
197 SDL_EventQ.active = 0; | |
198 if ( SDL_EventThread ) { | |
199 SDL_WaitThread(SDL_EventThread, NULL); | |
200 SDL_EventThread = NULL; | |
201 SDL_DestroyMutex(SDL_EventLock.lock); | |
202 } | |
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iPod Linux framebuffer support.
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203 #ifndef IPOD |
0 | 204 SDL_DestroyMutex(SDL_EventQ.lock); |
1140
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iPod Linux framebuffer support.
Ryan C. Gordon <icculus@icculus.org>
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205 #endif |
0 | 206 } |
207 | |
208 Uint32 SDL_EventThreadID(void) | |
209 { | |
210 return(event_thread); | |
211 } | |
212 | |
213 /* Public functions */ | |
214 | |
215 void SDL_StopEventLoop(void) | |
216 { | |
217 /* Halt the event thread, if running */ | |
218 SDL_StopEventThread(); | |
219 | |
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Date: Fri, 08 Jul 2005 22:43:48 +0200 (CEST)
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220 /* Shutdown event handlers */ |
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221 SDL_AppActiveQuit(); |
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Date: Fri, 08 Jul 2005 22:43:48 +0200 (CEST)
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222 SDL_KeyboardQuit(); |
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Date: Fri, 08 Jul 2005 22:43:48 +0200 (CEST)
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223 SDL_MouseQuit(); |
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Date: Fri, 08 Jul 2005 22:43:48 +0200 (CEST)
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224 SDL_QuitQuit(); |
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Date: Fri, 08 Jul 2005 22:43:48 +0200 (CEST)
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225 |
0 | 226 /* Clean out EventQ */ |
227 SDL_EventQ.head = 0; | |
228 SDL_EventQ.tail = 0; | |
229 SDL_EventQ.wmmsg_next = 0; | |
230 } | |
231 | |
232 /* This function (and associated calls) may be called more than once */ | |
233 int SDL_StartEventLoop(Uint32 flags) | |
234 { | |
235 int retcode; | |
236 | |
237 /* Clean out the event queue */ | |
238 SDL_EventThread = NULL; | |
239 SDL_EventQ.lock = NULL; | |
240 SDL_StopEventLoop(); | |
241 | |
242 /* No filter to start with, process most event types */ | |
243 SDL_EventOK = NULL; | |
244 memset(SDL_ProcessEvents,SDL_ENABLE,sizeof(SDL_ProcessEvents)); | |
245 SDL_eventstate = ~0; | |
246 /* It's not save to call SDL_EventState() yet */ | |
247 SDL_eventstate &= ~(0x00000001 << SDL_SYSWMEVENT); | |
248 SDL_ProcessEvents[SDL_SYSWMEVENT] = SDL_IGNORE; | |
249 | |
250 /* Initialize event handlers */ | |
251 retcode = 0; | |
252 retcode += SDL_AppActiveInit(); | |
253 retcode += SDL_KeyboardInit(); | |
254 retcode += SDL_MouseInit(); | |
255 retcode += SDL_QuitInit(); | |
256 if ( retcode < 0 ) { | |
257 /* We don't expect them to fail, but... */ | |
258 return(-1); | |
259 } | |
260 | |
261 /* Create the lock and event thread */ | |
262 if ( SDL_StartEventThread(flags) < 0 ) { | |
263 SDL_StopEventLoop(); | |
264 return(-1); | |
265 } | |
266 return(0); | |
267 } | |
268 | |
269 | |
270 /* Add an event to the event queue -- called with the queue locked */ | |
271 static int SDL_AddEvent(SDL_Event *event) | |
272 { | |
273 int tail, added; | |
274 | |
275 tail = (SDL_EventQ.tail+1)%MAXEVENTS; | |
276 if ( tail == SDL_EventQ.head ) { | |
277 /* Overflow, drop event */ | |
278 added = 0; | |
279 } else { | |
280 SDL_EventQ.event[SDL_EventQ.tail] = *event; | |
281 if (event->type == SDL_SYSWMEVENT) { | |
282 /* Note that it's possible to lose an event */ | |
283 int next = SDL_EventQ.wmmsg_next; | |
284 SDL_EventQ.wmmsg[next] = *event->syswm.msg; | |
285 SDL_EventQ.event[SDL_EventQ.tail].syswm.msg = | |
286 &SDL_EventQ.wmmsg[next]; | |
287 SDL_EventQ.wmmsg_next = (next+1)%MAXEVENTS; | |
288 } | |
289 SDL_EventQ.tail = tail; | |
290 added = 1; | |
291 } | |
292 return(added); | |
293 } | |
294 | |
295 /* Cut an event, and return the next valid spot, or the tail */ | |
296 /* -- called with the queue locked */ | |
297 static int SDL_CutEvent(int spot) | |
298 { | |
299 if ( spot == SDL_EventQ.head ) { | |
300 SDL_EventQ.head = (SDL_EventQ.head+1)%MAXEVENTS; | |
301 return(SDL_EventQ.head); | |
302 } else | |
303 if ( (spot+1)%MAXEVENTS == SDL_EventQ.tail ) { | |
304 SDL_EventQ.tail = spot; | |
305 return(SDL_EventQ.tail); | |
306 } else | |
307 /* We cut the middle -- shift everything over */ | |
308 { | |
309 int here, next; | |
310 | |
311 /* This can probably be optimized with memcpy() -- careful! */ | |
312 if ( --SDL_EventQ.tail < 0 ) { | |
313 SDL_EventQ.tail = MAXEVENTS-1; | |
314 } | |
315 for ( here=spot; here != SDL_EventQ.tail; here = next ) { | |
316 next = (here+1)%MAXEVENTS; | |
317 SDL_EventQ.event[here] = SDL_EventQ.event[next]; | |
318 } | |
319 return(spot); | |
320 } | |
321 /* NOTREACHED */ | |
322 } | |
323 | |
324 /* Lock the event queue, take a peep at it, and unlock it */ | |
325 int SDL_PeepEvents(SDL_Event *events, int numevents, SDL_eventaction action, | |
326 Uint32 mask) | |
327 { | |
328 int i, used; | |
329 | |
330 /* Don't look after we've quit */ | |
331 if ( ! SDL_EventQ.active ) { | |
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332 return(-1); |
0 | 333 } |
334 /* Lock the event queue */ | |
335 used = 0; | |
336 if ( SDL_mutexP(SDL_EventQ.lock) == 0 ) { | |
337 if ( action == SDL_ADDEVENT ) { | |
338 for ( i=0; i<numevents; ++i ) { | |
339 used += SDL_AddEvent(&events[i]); | |
340 } | |
341 } else { | |
342 SDL_Event tmpevent; | |
343 int spot; | |
344 | |
345 /* If 'events' is NULL, just see if they exist */ | |
346 if ( events == NULL ) { | |
347 action = SDL_PEEKEVENT; | |
348 numevents = 1; | |
349 events = &tmpevent; | |
350 } | |
351 spot = SDL_EventQ.head; | |
352 while ((used < numevents)&&(spot != SDL_EventQ.tail)) { | |
353 if ( mask & SDL_EVENTMASK(SDL_EventQ.event[spot].type) ) { | |
354 events[used++] = SDL_EventQ.event[spot]; | |
355 if ( action == SDL_GETEVENT ) { | |
356 spot = SDL_CutEvent(spot); | |
357 } else { | |
358 spot = (spot+1)%MAXEVENTS; | |
359 } | |
360 } else { | |
361 spot = (spot+1)%MAXEVENTS; | |
362 } | |
363 } | |
364 } | |
365 SDL_mutexV(SDL_EventQ.lock); | |
366 } else { | |
367 SDL_SetError("Couldn't lock event queue"); | |
368 used = -1; | |
369 } | |
370 return(used); | |
371 } | |
372 | |
373 /* Run the system dependent event loops */ | |
374 void SDL_PumpEvents(void) | |
375 { | |
376 if ( !SDL_EventThread ) { | |
377 SDL_VideoDevice *video = current_video; | |
378 SDL_VideoDevice *this = current_video; | |
379 | |
380 /* Get events from the video subsystem */ | |
381 if ( video ) { | |
382 video->PumpEvents(this); | |
383 } | |
384 | |
385 /* Queue pending key-repeat events */ | |
386 SDL_CheckKeyRepeat(); | |
387 | |
388 #ifndef DISABLE_JOYSTICK | |
389 /* Check for joystick state change */ | |
390 if ( SDL_numjoysticks && (SDL_eventstate & SDL_JOYEVENTMASK) ) { | |
391 SDL_JoystickUpdate(); | |
392 } | |
393 #endif | |
394 } | |
395 } | |
396 | |
397 /* Public functions */ | |
398 | |
399 int SDL_PollEvent (SDL_Event *event) | |
400 { | |
401 SDL_PumpEvents(); | |
402 | |
352
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403 /* We can't return -1, just return 0 (no event) on error */ |
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404 if ( SDL_PeepEvents(event, 1, SDL_GETEVENT, SDL_ALLEVENTS) <= 0 ) |
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405 return 0; |
b49fc922e7f6
Fixed SDL_PollEvent() so it only returns a boolean value (not -1)
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406 return 1; |
0 | 407 } |
408 | |
409 int SDL_WaitEvent (SDL_Event *event) | |
410 { | |
411 while ( 1 ) { | |
412 SDL_PumpEvents(); | |
413 switch(SDL_PeepEvents(event, 1, SDL_GETEVENT, SDL_ALLEVENTS)) { | |
353
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414 case -1: return 0; |
0 | 415 case 1: return 1; |
416 case 0: SDL_Delay(10); | |
417 } | |
418 } | |
419 } | |
420 | |
421 int SDL_PushEvent(SDL_Event *event) | |
422 { | |
384 | 423 if ( SDL_PeepEvents(event, 1, SDL_ADDEVENT, 0) <= 0 ) |
424 return -1; | |
425 return 0; | |
0 | 426 } |
427 | |
428 void SDL_SetEventFilter (SDL_EventFilter filter) | |
429 { | |
430 SDL_Event bitbucket; | |
431 | |
432 /* Set filter and discard pending events */ | |
433 SDL_EventOK = filter; | |
434 while ( SDL_PollEvent(&bitbucket) > 0 ) | |
435 ; | |
436 } | |
437 | |
438 SDL_EventFilter SDL_GetEventFilter(void) | |
439 { | |
440 return(SDL_EventOK); | |
441 } | |
442 | |
443 Uint8 SDL_EventState (Uint8 type, int state) | |
444 { | |
445 SDL_Event bitbucket; | |
446 Uint8 current_state; | |
447 | |
448 /* If SDL_ALLEVENTS was specified... */ | |
449 if ( type == 0xFF ) { | |
450 current_state = SDL_IGNORE; | |
451 for ( type=0; type<SDL_NUMEVENTS; ++type ) { | |
452 if ( SDL_ProcessEvents[type] != SDL_IGNORE ) { | |
453 current_state = SDL_ENABLE; | |
454 } | |
455 SDL_ProcessEvents[type] = state; | |
456 if ( state == SDL_ENABLE ) { | |
457 SDL_eventstate |= (0x00000001 << (type)); | |
458 } else { | |
459 SDL_eventstate &= ~(0x00000001 << (type)); | |
460 } | |
461 } | |
462 while ( SDL_PollEvent(&bitbucket) > 0 ) | |
463 ; | |
464 return(current_state); | |
465 } | |
466 | |
467 /* Just set the state for one event type */ | |
468 current_state = SDL_ProcessEvents[type]; | |
469 switch (state) { | |
470 case SDL_IGNORE: | |
471 case SDL_ENABLE: | |
472 /* Set state and discard pending events */ | |
473 SDL_ProcessEvents[type] = state; | |
474 if ( state == SDL_ENABLE ) { | |
475 SDL_eventstate |= (0x00000001 << (type)); | |
476 } else { | |
477 SDL_eventstate &= ~(0x00000001 << (type)); | |
478 } | |
479 while ( SDL_PollEvent(&bitbucket) > 0 ) | |
480 ; | |
481 break; | |
482 default: | |
483 /* Querying state? */ | |
484 break; | |
485 } | |
486 return(current_state); | |
487 } | |
488 | |
489 /* This is a generic event handler. | |
490 */ | |
491 int SDL_PrivateSysWMEvent(SDL_SysWMmsg *message) | |
492 { | |
493 int posted; | |
494 | |
495 posted = 0; | |
496 if ( SDL_ProcessEvents[SDL_SYSWMEVENT] == SDL_ENABLE ) { | |
497 SDL_Event event; | |
498 memset(&event, 0, sizeof(event)); | |
499 event.type = SDL_SYSWMEVENT; | |
500 event.syswm.msg = message; | |
501 if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) { | |
502 posted = 1; | |
503 SDL_PushEvent(&event); | |
504 } | |
505 } | |
506 /* Update internal event state */ | |
507 return(posted); | |
508 } |