slouken@0
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/*
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SDL - Simple DirectMedia Layer
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slouken@3697
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Copyright (C) 1997-2010 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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slouken@0
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Sam Lantinga
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slouken@libsdl.org
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slouken@0
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*/
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#include "SDL_config.h"
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/* General event handling code for SDL */
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#include "SDL.h"
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#include "SDL_events.h"
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#include "SDL_syswm.h"
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#include "SDL_thread.h"
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#include "SDL_sysevents.h"
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#include "SDL_events_c.h"
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#include "../timer/SDL_timer_c.h"
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#if !SDL_JOYSTICK_DISABLED
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#include "../joystick/SDL_joystick_c.h"
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#endif
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/* Public data -- the event filter */
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SDL_EventFilter SDL_EventOK = NULL;
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void *SDL_EventOKParam;
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typedef struct {
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Uint32 bits[8];
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} SDL_DisabledEventBlock;
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static SDL_DisabledEventBlock *SDL_disabled_events[256];
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static Uint32 SDL_userevents = SDL_USEREVENT;
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/* Private data -- event queue */
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#define MAXEVENTS 128
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static struct
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{
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SDL_mutex *lock;
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int active;
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int head;
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int tail;
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SDL_Event event[MAXEVENTS];
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int wmmsg_next;
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struct SDL_SysWMmsg wmmsg[MAXEVENTS];
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} SDL_EventQ;
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/* Private data -- event locking structure */
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static struct
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{
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SDL_mutex *lock;
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int safe;
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} SDL_EventLock;
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/* Thread functions */
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static SDL_Thread *SDL_EventThread = NULL; /* Thread handle */
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static SDL_threadID event_thread; /* The event thread id */
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void
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SDL_Lock_EventThread(void)
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{
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if (SDL_EventThread && (SDL_ThreadID() != event_thread)) {
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/* Grab lock and spin until we're sure event thread stopped */
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SDL_mutexP(SDL_EventLock.lock);
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while (!SDL_EventLock.safe) {
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SDL_Delay(1);
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}
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}
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}
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void
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SDL_Unlock_EventThread(void)
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{
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if (SDL_EventThread && (SDL_ThreadID() != event_thread)) {
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SDL_mutexV(SDL_EventLock.lock);
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}
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}
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static __inline__ SDL_bool
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SDL_ShouldPollJoystick()
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{
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#if !SDL_JOYSTICK_DISABLED
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if (SDL_numjoysticks &&
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(!SDL_disabled_events[SDL_JOYAXISMOTION >> 8] ||
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SDL_JoystickEventState(SDL_QUERY))) {
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return SDL_TRUE;
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}
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#endif
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return SDL_FALSE;
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}
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static int SDLCALL
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SDL_GobbleEvents(void *unused)
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{
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event_thread = SDL_ThreadID();
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while (SDL_EventQ.active) {
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SDL_VideoDevice *_this = SDL_GetVideoDevice();
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/* Get events from the video subsystem */
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if (_this) {
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_this->PumpEvents(_this);
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}
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#if !SDL_JOYSTICK_DISABLED
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/* Check for joystick state change */
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if (SDL_ShouldPollJoystick()) {
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SDL_JoystickUpdate();
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}
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#endif
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/* Give up the CPU for the rest of our timeslice */
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SDL_EventLock.safe = 1;
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if (SDL_timer_running) {
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SDL_ThreadedTimerCheck();
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}
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SDL_Delay(1);
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/* Check for event locking.
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On the P of the lock mutex, if the lock is held, this thread
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will wait until the lock is released before continuing. The
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safe flag will be set, meaning that the other thread can go
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about it's business. The safe flag is reset before the V,
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so as soon as the mutex is free, other threads can see that
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it's not safe to interfere with the event thread.
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*/
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SDL_mutexP(SDL_EventLock.lock);
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SDL_EventLock.safe = 0;
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SDL_mutexV(SDL_EventLock.lock);
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}
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SDL_SetTimerThreaded(0);
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event_thread = 0;
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return (0);
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}
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static int
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SDL_StartEventThread(Uint32 flags)
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{
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/* Reset everything to zero */
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SDL_EventThread = NULL;
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SDL_memset(&SDL_EventLock, 0, sizeof(SDL_EventLock));
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/* Create the lock and set ourselves active */
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#if !SDL_THREADS_DISABLED
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SDL_EventQ.lock = SDL_CreateMutex();
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if (SDL_EventQ.lock == NULL) {
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return (-1);
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}
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#endif /* !SDL_THREADS_DISABLED */
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SDL_EventQ.active = 1;
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if ((flags & SDL_INIT_EVENTTHREAD) == SDL_INIT_EVENTTHREAD) {
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SDL_EventLock.lock = SDL_CreateMutex();
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if (SDL_EventLock.lock == NULL) {
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return (-1);
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}
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SDL_EventLock.safe = 0;
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/* The event thread will handle timers too */
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SDL_SetTimerThreaded(2);
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#if (defined(__WIN32__) && !defined(_WIN32_WCE)) && !defined(HAVE_LIBC)
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#undef SDL_CreateThread
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SDL_EventThread =
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SDL_CreateThread(SDL_GobbleEvents, NULL, NULL, NULL);
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#else
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SDL_EventThread = SDL_CreateThread(SDL_GobbleEvents, NULL);
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#endif
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if (SDL_EventThread == NULL) {
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return (-1);
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}
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} else {
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event_thread = 0;
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}
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return (0);
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}
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static void
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SDL_StopEventThread(void)
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{
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slouken@1895
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SDL_EventQ.active = 0;
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slouken@1895
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if (SDL_EventThread) {
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slouken@1895
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SDL_WaitThread(SDL_EventThread, NULL);
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slouken@1895
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SDL_EventThread = NULL;
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slouken@1895
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SDL_DestroyMutex(SDL_EventLock.lock);
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icculus@3611
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SDL_EventLock.lock = NULL;
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slouken@1895
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}
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slouken@3259
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if (SDL_EventQ.lock) {
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SDL_DestroyMutex(SDL_EventQ.lock);
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slouken@3259
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SDL_EventQ.lock = NULL;
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slouken@3259
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}
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slouken@0
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}
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slouken@0
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SDL_threadID
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SDL_EventThreadID(void)
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slouken@0
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{
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slouken@1895
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return (event_thread);
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}
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slouken@0
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slouken@0
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/* Public functions */
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slouken@0
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slouken@1895
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void
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SDL_StopEventLoop(void)
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slouken@0
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{
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slouken@4429
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int i;
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slouken@4429
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slouken@1895
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/* Halt the event thread, if running */
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slouken@1895
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SDL_StopEventThread();
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slouken@0
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slouken@1895
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/* Shutdown event handlers */
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slouken@1895
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SDL_KeyboardQuit();
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slouken@1895
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SDL_MouseQuit();
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slouken@1895
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SDL_QuitQuit();
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slouken@1123
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slouken@1895
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/* Clean out EventQ */
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slouken@1895
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SDL_EventQ.head = 0;
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slouken@1895
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SDL_EventQ.tail = 0;
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slouken@1895
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SDL_EventQ.wmmsg_next = 0;
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slouken@4429
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slouken@4429
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/* Clear disabled event state */
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slouken@4429
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for (i = 0; i < SDL_arraysize(SDL_disabled_events); ++i) {
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slouken@4429
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233 |
if (SDL_disabled_events[i]) {
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slouken@4429
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234 |
SDL_free(SDL_disabled_events[i]);
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slouken@4429
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235 |
SDL_disabled_events[i] = NULL;
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slouken@4429
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236 |
}
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slouken@4429
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237 |
}
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slouken@0
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238 |
}
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slouken@0
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239 |
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slouken@0
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240 |
/* This function (and associated calls) may be called more than once */
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slouken@1895
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241 |
int
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slouken@1895
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242 |
SDL_StartEventLoop(Uint32 flags)
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slouken@0
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243 |
{
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slouken@1895
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244 |
int retcode;
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slouken@0
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245 |
|
slouken@1895
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246 |
/* Clean out the event queue */
|
slouken@1895
|
247 |
SDL_EventThread = NULL;
|
slouken@1895
|
248 |
SDL_EventQ.lock = NULL;
|
slouken@1895
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249 |
SDL_StopEventLoop();
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slouken@0
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250 |
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slouken@1895
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251 |
/* No filter to start with, process most event types */
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slouken@1895
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252 |
SDL_EventOK = NULL;
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slouken@4429
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253 |
SDL_EventState(SDL_SYSWMEVENT, SDL_DISABLE);
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slouken@0
|
254 |
|
slouken@1895
|
255 |
/* Initialize event handlers */
|
slouken@1895
|
256 |
retcode = 0;
|
slouken@1895
|
257 |
retcode += SDL_KeyboardInit();
|
slouken@1895
|
258 |
retcode += SDL_MouseInit();
|
slouken@1895
|
259 |
retcode += SDL_QuitInit();
|
slouken@1895
|
260 |
if (retcode < 0) {
|
slouken@1895
|
261 |
/* We don't expect them to fail, but... */
|
slouken@1895
|
262 |
return (-1);
|
slouken@1895
|
263 |
}
|
slouken@1895
|
264 |
|
slouken@1895
|
265 |
/* Create the lock and event thread */
|
slouken@1895
|
266 |
if (SDL_StartEventThread(flags) < 0) {
|
slouken@1895
|
267 |
SDL_StopEventLoop();
|
slouken@1895
|
268 |
return (-1);
|
slouken@1895
|
269 |
}
|
slouken@1895
|
270 |
return (0);
|
slouken@0
|
271 |
}
|
slouken@0
|
272 |
|
slouken@0
|
273 |
|
slouken@0
|
274 |
/* Add an event to the event queue -- called with the queue locked */
|
slouken@1895
|
275 |
static int
|
slouken@1895
|
276 |
SDL_AddEvent(SDL_Event * event)
|
slouken@0
|
277 |
{
|
slouken@1895
|
278 |
int tail, added;
|
slouken@0
|
279 |
|
slouken@1895
|
280 |
tail = (SDL_EventQ.tail + 1) % MAXEVENTS;
|
slouken@1895
|
281 |
if (tail == SDL_EventQ.head) {
|
slouken@1895
|
282 |
/* Overflow, drop event */
|
slouken@1895
|
283 |
added = 0;
|
slouken@1895
|
284 |
} else {
|
slouken@1895
|
285 |
SDL_EventQ.event[SDL_EventQ.tail] = *event;
|
slouken@1895
|
286 |
if (event->type == SDL_SYSWMEVENT) {
|
slouken@1895
|
287 |
/* Note that it's possible to lose an event */
|
slouken@1895
|
288 |
int next = SDL_EventQ.wmmsg_next;
|
slouken@1895
|
289 |
SDL_EventQ.wmmsg[next] = *event->syswm.msg;
|
slouken@1895
|
290 |
SDL_EventQ.event[SDL_EventQ.tail].syswm.msg =
|
slouken@1895
|
291 |
&SDL_EventQ.wmmsg[next];
|
slouken@1895
|
292 |
SDL_EventQ.wmmsg_next = (next + 1) % MAXEVENTS;
|
slouken@1895
|
293 |
}
|
slouken@1895
|
294 |
SDL_EventQ.tail = tail;
|
slouken@1895
|
295 |
added = 1;
|
slouken@1895
|
296 |
}
|
slouken@1895
|
297 |
return (added);
|
slouken@0
|
298 |
}
|
slouken@0
|
299 |
|
slouken@0
|
300 |
/* Cut an event, and return the next valid spot, or the tail */
|
slouken@0
|
301 |
/* -- called with the queue locked */
|
slouken@1895
|
302 |
static int
|
slouken@1895
|
303 |
SDL_CutEvent(int spot)
|
slouken@0
|
304 |
{
|
slouken@1895
|
305 |
if (spot == SDL_EventQ.head) {
|
slouken@1895
|
306 |
SDL_EventQ.head = (SDL_EventQ.head + 1) % MAXEVENTS;
|
slouken@1895
|
307 |
return (SDL_EventQ.head);
|
slouken@1895
|
308 |
} else if ((spot + 1) % MAXEVENTS == SDL_EventQ.tail) {
|
slouken@1895
|
309 |
SDL_EventQ.tail = spot;
|
slouken@1895
|
310 |
return (SDL_EventQ.tail);
|
slouken@1895
|
311 |
} else
|
slouken@1895
|
312 |
/* We cut the middle -- shift everything over */
|
slouken@1895
|
313 |
{
|
slouken@1895
|
314 |
int here, next;
|
slouken@0
|
315 |
|
slouken@1895
|
316 |
/* This can probably be optimized with SDL_memcpy() -- careful! */
|
slouken@1895
|
317 |
if (--SDL_EventQ.tail < 0) {
|
slouken@1895
|
318 |
SDL_EventQ.tail = MAXEVENTS - 1;
|
slouken@1895
|
319 |
}
|
slouken@1895
|
320 |
for (here = spot; here != SDL_EventQ.tail; here = next) {
|
slouken@1895
|
321 |
next = (here + 1) % MAXEVENTS;
|
slouken@1895
|
322 |
SDL_EventQ.event[here] = SDL_EventQ.event[next];
|
slouken@1895
|
323 |
}
|
slouken@1895
|
324 |
return (spot);
|
slouken@1895
|
325 |
}
|
slouken@1895
|
326 |
/* NOTREACHED */
|
slouken@0
|
327 |
}
|
slouken@0
|
328 |
|
slouken@0
|
329 |
/* Lock the event queue, take a peep at it, and unlock it */
|
slouken@1895
|
330 |
int
|
slouken@1895
|
331 |
SDL_PeepEvents(SDL_Event * events, int numevents, SDL_eventaction action,
|
slouken@4429
|
332 |
Uint32 minType, Uint32 maxType)
|
slouken@0
|
333 |
{
|
slouken@1895
|
334 |
int i, used;
|
slouken@0
|
335 |
|
slouken@1895
|
336 |
/* Don't look after we've quit */
|
slouken@1895
|
337 |
if (!SDL_EventQ.active) {
|
slouken@1895
|
338 |
return (-1);
|
slouken@1895
|
339 |
}
|
slouken@1895
|
340 |
/* Lock the event queue */
|
slouken@1895
|
341 |
used = 0;
|
slouken@1895
|
342 |
if (SDL_mutexP(SDL_EventQ.lock) == 0) {
|
slouken@1895
|
343 |
if (action == SDL_ADDEVENT) {
|
slouken@1895
|
344 |
for (i = 0; i < numevents; ++i) {
|
slouken@1895
|
345 |
used += SDL_AddEvent(&events[i]);
|
slouken@1895
|
346 |
}
|
slouken@1895
|
347 |
} else {
|
slouken@1895
|
348 |
SDL_Event tmpevent;
|
slouken@1895
|
349 |
int spot;
|
slouken@0
|
350 |
|
slouken@1895
|
351 |
/* If 'events' is NULL, just see if they exist */
|
slouken@1895
|
352 |
if (events == NULL) {
|
slouken@1895
|
353 |
action = SDL_PEEKEVENT;
|
slouken@1895
|
354 |
numevents = 1;
|
slouken@1895
|
355 |
events = &tmpevent;
|
slouken@1895
|
356 |
}
|
slouken@1895
|
357 |
spot = SDL_EventQ.head;
|
slouken@1895
|
358 |
while ((used < numevents) && (spot != SDL_EventQ.tail)) {
|
slouken@4429
|
359 |
Uint32 type = SDL_EventQ.event[spot].type;
|
slouken@4429
|
360 |
if (minType <= type && type <= maxType) {
|
slouken@1895
|
361 |
events[used++] = SDL_EventQ.event[spot];
|
slouken@1895
|
362 |
if (action == SDL_GETEVENT) {
|
slouken@1895
|
363 |
spot = SDL_CutEvent(spot);
|
slouken@1895
|
364 |
} else {
|
slouken@1895
|
365 |
spot = (spot + 1) % MAXEVENTS;
|
slouken@1895
|
366 |
}
|
slouken@1895
|
367 |
} else {
|
slouken@1895
|
368 |
spot = (spot + 1) % MAXEVENTS;
|
slouken@1895
|
369 |
}
|
slouken@1895
|
370 |
}
|
slouken@1895
|
371 |
}
|
slouken@1895
|
372 |
SDL_mutexV(SDL_EventQ.lock);
|
slouken@1895
|
373 |
} else {
|
slouken@1895
|
374 |
SDL_SetError("Couldn't lock event queue");
|
slouken@1895
|
375 |
used = -1;
|
slouken@1895
|
376 |
}
|
slouken@1895
|
377 |
return (used);
|
slouken@1895
|
378 |
}
|
slouken@1895
|
379 |
|
slouken@1895
|
380 |
SDL_bool
|
slouken@4429
|
381 |
SDL_HasEvent(Uint32 type)
|
slouken@4429
|
382 |
{
|
slouken@4429
|
383 |
return (SDL_PeepEvents(NULL, 0, SDL_PEEKEVENT, type, type) > 0);
|
slouken@4429
|
384 |
}
|
slouken@4429
|
385 |
|
slouken@4429
|
386 |
SDL_bool
|
slouken@4429
|
387 |
SDL_HasEvents(Uint32 minType, Uint32 maxType)
|
slouken@4429
|
388 |
{
|
slouken@4429
|
389 |
return (SDL_PeepEvents(NULL, 0, SDL_PEEKEVENT, minType, maxType) > 0);
|
slouken@4429
|
390 |
}
|
slouken@4429
|
391 |
|
slouken@4429
|
392 |
void
|
slouken@4429
|
393 |
SDL_FlushEvent(Uint32 type)
|
slouken@1895
|
394 |
{
|
slouken@4429
|
395 |
SDL_FlushEvents(type, type);
|
slouken@4429
|
396 |
}
|
slouken@4429
|
397 |
|
slouken@4429
|
398 |
void
|
slouken@4429
|
399 |
SDL_FlushEvents(Uint32 minType, Uint32 maxType)
|
slouken@4429
|
400 |
{
|
slouken@4429
|
401 |
/* Don't look after we've quit */
|
slouken@4429
|
402 |
if (!SDL_EventQ.active) {
|
slouken@4429
|
403 |
return;
|
slouken@4429
|
404 |
}
|
slouken@4429
|
405 |
|
slouken@4460
|
406 |
/* Make sure the events are current */
|
slouken@4460
|
407 |
SDL_PumpEvents();
|
slouken@4460
|
408 |
|
slouken@4429
|
409 |
/* Lock the event queue */
|
slouken@4429
|
410 |
if (SDL_mutexP(SDL_EventQ.lock) == 0) {
|
slouken@4429
|
411 |
int spot = SDL_EventQ.head;
|
slouken@4429
|
412 |
while (spot != SDL_EventQ.tail) {
|
slouken@4429
|
413 |
Uint32 type = SDL_EventQ.event[spot].type;
|
slouken@4429
|
414 |
if (minType <= type && type <= maxType) {
|
slouken@4429
|
415 |
spot = SDL_CutEvent(spot);
|
slouken@4429
|
416 |
} else {
|
slouken@4429
|
417 |
spot = (spot + 1) % MAXEVENTS;
|
slouken@4429
|
418 |
}
|
slouken@4429
|
419 |
}
|
slouken@4429
|
420 |
SDL_mutexV(SDL_EventQ.lock);
|
slouken@4429
|
421 |
}
|
slouken@0
|
422 |
}
|
slouken@0
|
423 |
|
slouken@0
|
424 |
/* Run the system dependent event loops */
|
slouken@1895
|
425 |
void
|
slouken@1895
|
426 |
SDL_PumpEvents(void)
|
slouken@0
|
427 |
{
|
slouken@1895
|
428 |
if (!SDL_EventThread) {
|
slouken@1895
|
429 |
SDL_VideoDevice *_this = SDL_GetVideoDevice();
|
slouken@0
|
430 |
|
slouken@1895
|
431 |
/* Get events from the video subsystem */
|
slouken@1895
|
432 |
if (_this) {
|
slouken@1895
|
433 |
_this->PumpEvents(_this);
|
slouken@1895
|
434 |
}
|
slouken@1361
|
435 |
#if !SDL_JOYSTICK_DISABLED
|
slouken@1895
|
436 |
/* Check for joystick state change */
|
slouken@4429
|
437 |
if (SDL_ShouldPollJoystick()) {
|
slouken@1895
|
438 |
SDL_JoystickUpdate();
|
slouken@1895
|
439 |
}
|
slouken@0
|
440 |
#endif
|
slouken@1895
|
441 |
}
|
slouken@0
|
442 |
}
|
slouken@0
|
443 |
|
slouken@0
|
444 |
/* Public functions */
|
slouken@0
|
445 |
|
slouken@1895
|
446 |
int
|
slouken@1895
|
447 |
SDL_PollEvent(SDL_Event * event)
|
slouken@0
|
448 |
{
|
slouken@3072
|
449 |
return SDL_WaitEventTimeout(event, 0);
|
slouken@1895
|
450 |
}
|
slouken@0
|
451 |
|
slouken@1895
|
452 |
int
|
slouken@1895
|
453 |
SDL_WaitEvent(SDL_Event * event)
|
slouken@1895
|
454 |
{
|
slouken@3072
|
455 |
return SDL_WaitEventTimeout(event, -1);
|
slouken@3072
|
456 |
}
|
slouken@3072
|
457 |
|
slouken@3072
|
458 |
int
|
slouken@3072
|
459 |
SDL_WaitEventTimeout(SDL_Event * event, int timeout)
|
slouken@3072
|
460 |
{
|
slouken@3072
|
461 |
Uint32 expiration = 0;
|
slouken@3072
|
462 |
|
slouken@3072
|
463 |
if (timeout > 0)
|
slouken@3072
|
464 |
expiration = SDL_GetTicks() + timeout;
|
slouken@3072
|
465 |
|
slouken@3072
|
466 |
for (;;) {
|
slouken@1895
|
467 |
SDL_PumpEvents();
|
slouken@4429
|
468 |
switch (SDL_PeepEvents(event, 1, SDL_GETEVENT, SDL_FIRSTEVENT, SDL_LASTEVENT)) {
|
slouken@1895
|
469 |
case -1:
|
slouken@1895
|
470 |
return 0;
|
slouken@1895
|
471 |
case 1:
|
slouken@1895
|
472 |
return 1;
|
slouken@1895
|
473 |
case 0:
|
slouken@3072
|
474 |
if (timeout == 0) {
|
slouken@3072
|
475 |
/* Polling and no events, just return */
|
slouken@3072
|
476 |
return 0;
|
slouken@3072
|
477 |
}
|
slouken@3072
|
478 |
if (timeout > 0 && ((int) (SDL_GetTicks() - expiration) >= 0)) {
|
slouken@3072
|
479 |
/* Timeout expired and no events */
|
slouken@3072
|
480 |
return 0;
|
slouken@3072
|
481 |
}
|
slouken@1895
|
482 |
SDL_Delay(10);
|
slouken@3072
|
483 |
break;
|
slouken@1895
|
484 |
}
|
slouken@1895
|
485 |
}
|
slouken@0
|
486 |
}
|
slouken@0
|
487 |
|
slouken@1895
|
488 |
int
|
slouken@1895
|
489 |
SDL_PushEvent(SDL_Event * event)
|
slouken@0
|
490 |
{
|
slouken@1895
|
491 |
if (SDL_EventOK && !SDL_EventOK(SDL_EventOKParam, event)) {
|
slouken@1895
|
492 |
return 0;
|
slouken@1895
|
493 |
}
|
slouken@4429
|
494 |
if (SDL_PeepEvents(event, 1, SDL_ADDEVENT, 0, 0) <= 0) {
|
slouken@1895
|
495 |
return -1;
|
slouken@1895
|
496 |
}
|
slouken@1895
|
497 |
return 1;
|
slouken@0
|
498 |
}
|
slouken@0
|
499 |
|
slouken@1895
|
500 |
void
|
slouken@1895
|
501 |
SDL_SetEventFilter(SDL_EventFilter filter, void *userdata)
|
slouken@0
|
502 |
{
|
slouken@1895
|
503 |
SDL_Event bitbucket;
|
slouken@1895
|
504 |
|
slouken@1895
|
505 |
/* Set filter and discard pending events */
|
slouken@1895
|
506 |
SDL_EventOK = filter;
|
slouken@1895
|
507 |
SDL_EventOKParam = userdata;
|
slouken@1895
|
508 |
while (SDL_PollEvent(&bitbucket) > 0);
|
slouken@0
|
509 |
}
|
slouken@0
|
510 |
|
slouken@1895
|
511 |
SDL_bool
|
slouken@1895
|
512 |
SDL_GetEventFilter(SDL_EventFilter * filter, void **userdata)
|
slouken@0
|
513 |
{
|
slouken@1895
|
514 |
if (filter) {
|
slouken@1895
|
515 |
*filter = SDL_EventOK;
|
slouken@1895
|
516 |
}
|
slouken@1895
|
517 |
if (userdata) {
|
slouken@1895
|
518 |
*userdata = SDL_EventOKParam;
|
slouken@1895
|
519 |
}
|
slouken@1895
|
520 |
return SDL_EventOK ? SDL_TRUE : SDL_FALSE;
|
slouken@0
|
521 |
}
|
slouken@0
|
522 |
|
slouken@1895
|
523 |
void
|
slouken@1895
|
524 |
SDL_FilterEvents(SDL_EventFilter filter, void *userdata)
|
slouken@0
|
525 |
{
|
slouken@1895
|
526 |
if (SDL_mutexP(SDL_EventQ.lock) == 0) {
|
slouken@1895
|
527 |
int spot;
|
slouken@1895
|
528 |
|
slouken@1895
|
529 |
spot = SDL_EventQ.head;
|
slouken@1895
|
530 |
while (spot != SDL_EventQ.tail) {
|
slouken@1895
|
531 |
if (filter(userdata, &SDL_EventQ.event[spot])) {
|
slouken@1895
|
532 |
spot = (spot + 1) % MAXEVENTS;
|
slouken@1895
|
533 |
} else {
|
slouken@1895
|
534 |
spot = SDL_CutEvent(spot);
|
slouken@1895
|
535 |
}
|
slouken@1895
|
536 |
}
|
slouken@1895
|
537 |
}
|
slouken@1895
|
538 |
SDL_mutexV(SDL_EventQ.lock);
|
slouken@1895
|
539 |
}
|
slouken@1895
|
540 |
|
slouken@1895
|
541 |
Uint8
|
slouken@4429
|
542 |
SDL_EventState(Uint32 type, int state)
|
slouken@1895
|
543 |
{
|
slouken@1895
|
544 |
Uint8 current_state;
|
slouken@4429
|
545 |
Uint8 hi = ((type >> 8) & 0xff);
|
slouken@4429
|
546 |
Uint8 lo = (type & 0xff);
|
slouken@0
|
547 |
|
slouken@4429
|
548 |
if (SDL_disabled_events[hi] &&
|
slouken@4429
|
549 |
(SDL_disabled_events[hi]->bits[lo/32] & (1 << (lo&31)))) {
|
slouken@4429
|
550 |
current_state = SDL_DISABLE;
|
slouken@4429
|
551 |
} else {
|
slouken@4429
|
552 |
current_state = SDL_ENABLE;
|
slouken@1895
|
553 |
}
|
slouken@0
|
554 |
|
slouken@4429
|
555 |
if (state != current_state)
|
slouken@4429
|
556 |
{
|
slouken@4429
|
557 |
switch (state) {
|
slouken@4429
|
558 |
case SDL_DISABLE:
|
slouken@4429
|
559 |
/* Disable this event type and discard pending events */
|
slouken@4429
|
560 |
if (!SDL_disabled_events[hi]) {
|
slouken@4429
|
561 |
SDL_disabled_events[hi] = (SDL_DisabledEventBlock*) SDL_calloc(1, sizeof(SDL_DisabledEventBlock));
|
slouken@4429
|
562 |
if (!SDL_disabled_events[hi]) {
|
slouken@4429
|
563 |
/* Out of memory, nothing we can do... */
|
slouken@4429
|
564 |
break;
|
slouken@4429
|
565 |
}
|
slouken@4429
|
566 |
}
|
slouken@4429
|
567 |
SDL_disabled_events[hi]->bits[lo/32] |= (1 << (lo&31));
|
slouken@4429
|
568 |
SDL_FlushEvent(type);
|
slouken@4429
|
569 |
break;
|
slouken@4429
|
570 |
case SDL_ENABLE:
|
slouken@4429
|
571 |
SDL_disabled_events[hi]->bits[lo/32] &= ~(1 << (lo&31));
|
slouken@4429
|
572 |
break;
|
slouken@4429
|
573 |
default:
|
slouken@4429
|
574 |
/* Querying state... */
|
slouken@4429
|
575 |
break;
|
slouken@1895
|
576 |
}
|
slouken@1895
|
577 |
}
|
slouken@4429
|
578 |
|
slouken@4429
|
579 |
return current_state;
|
slouken@4429
|
580 |
}
|
slouken@4429
|
581 |
|
slouken@4429
|
582 |
Uint32
|
slouken@4429
|
583 |
SDL_RegisterEvents(int numevents)
|
slouken@4429
|
584 |
{
|
slouken@4429
|
585 |
Uint32 event_base;
|
slouken@4429
|
586 |
|
slouken@4429
|
587 |
if (SDL_userevents+numevents <= SDL_LASTEVENT) {
|
slouken@4429
|
588 |
event_base = SDL_userevents;
|
slouken@4429
|
589 |
SDL_userevents += numevents;
|
slouken@4429
|
590 |
} else {
|
slouken@4429
|
591 |
event_base = (Uint32)-1;
|
slouken@4429
|
592 |
}
|
slouken@4429
|
593 |
return event_base;
|
slouken@0
|
594 |
}
|
slouken@0
|
595 |
|
slouken@0
|
596 |
/* This is a generic event handler.
|
slouken@0
|
597 |
*/
|
slouken@1895
|
598 |
int
|
slouken@1895
|
599 |
SDL_SendSysWMEvent(SDL_SysWMmsg * message)
|
slouken@0
|
600 |
{
|
slouken@1895
|
601 |
int posted;
|
slouken@0
|
602 |
|
slouken@1895
|
603 |
posted = 0;
|
slouken@4429
|
604 |
if (SDL_GetEventState(SDL_SYSWMEVENT) == SDL_ENABLE) {
|
slouken@1895
|
605 |
SDL_Event event;
|
slouken@1895
|
606 |
SDL_memset(&event, 0, sizeof(event));
|
slouken@1895
|
607 |
event.type = SDL_SYSWMEVENT;
|
slouken@1895
|
608 |
event.syswm.msg = message;
|
slouken@1895
|
609 |
posted = (SDL_PushEvent(&event) > 0);
|
slouken@1895
|
610 |
}
|
slouken@1895
|
611 |
/* Update internal event state */
|
slouken@1895
|
612 |
return (posted);
|
slouken@0
|
613 |
}
|
slouken@1895
|
614 |
|
slouken@1895
|
615 |
/* vi: set ts=4 sw=4 expandtab: */
|