| /* |
| Simple DirectMedia Layer |
| Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org> |
| |
| This software is provided 'as-is', without any express or implied |
| warranty. In no event will the authors be held liable for any damages |
| arising from the use of this software. |
| |
| Permission is granted to anyone to use this software for any purpose, |
| including commercial applications, and to alter it and redistribute it |
| freely, subject to the following restrictions: |
| |
| 1. The origin of this software must not be misrepresented; you must not |
| claim that you wrote the original software. If you use this software |
| in a product, an acknowledgment in the product documentation would be |
| appreciated but is not required. |
| 2. Altered source versions must be plainly marked as such, and must not be |
| misrepresented as being the original software. |
| 3. This notice may not be removed or altered from any source distribution. |
| */ |
| #include "../SDL_internal.h" |
| |
| /* General event handling code for SDL */ |
| |
| #include "SDL.h" |
| #include "SDL_events.h" |
| #include "SDL_thread.h" |
| #include "SDL_events_c.h" |
| #include "../timer/SDL_timer_c.h" |
| #if !SDL_JOYSTICK_DISABLED |
| #include "../joystick/SDL_joystick_c.h" |
| #endif |
| #include "../video/SDL_sysvideo.h" |
| #include "SDL_syswm.h" |
| |
| #undef SDL_PRIs64 |
| #ifdef __WIN32__ |
| #define SDL_PRIs64 "I64d" |
| #else |
| #define SDL_PRIs64 "lld" |
| #endif |
| |
| /* An arbitrary limit so we don't have unbounded growth */ |
| #define SDL_MAX_QUEUED_EVENTS 65535 |
| |
| typedef struct SDL_EventWatcher { |
| SDL_EventFilter callback; |
| void *userdata; |
| SDL_bool removed; |
| } SDL_EventWatcher; |
| |
| static SDL_mutex *SDL_event_watchers_lock; |
| static SDL_EventWatcher SDL_EventOK; |
| static SDL_EventWatcher *SDL_event_watchers = NULL; |
| static int SDL_event_watchers_count = 0; |
| static SDL_bool SDL_event_watchers_dispatching = SDL_FALSE; |
| static SDL_bool SDL_event_watchers_removed = SDL_FALSE; |
| |
| typedef struct { |
| Uint32 bits[8]; |
| } SDL_DisabledEventBlock; |
| |
| static SDL_DisabledEventBlock *SDL_disabled_events[256]; |
| static Uint32 SDL_userevents = SDL_USEREVENT; |
| |
| /* Private data -- event queue */ |
| typedef struct _SDL_EventEntry |
| { |
| SDL_Event event; |
| SDL_SysWMmsg msg; |
| struct _SDL_EventEntry *prev; |
| struct _SDL_EventEntry *next; |
| } SDL_EventEntry; |
| |
| typedef struct _SDL_SysWMEntry |
| { |
| SDL_SysWMmsg msg; |
| struct _SDL_SysWMEntry *next; |
| } SDL_SysWMEntry; |
| |
| static struct |
| { |
| SDL_mutex *lock; |
| SDL_atomic_t active; |
| SDL_atomic_t count; |
| int max_events_seen; |
| SDL_EventEntry *head; |
| SDL_EventEntry *tail; |
| SDL_EventEntry *free; |
| SDL_SysWMEntry *wmmsg_used; |
| SDL_SysWMEntry *wmmsg_free; |
| } SDL_EventQ = { NULL, { 1 }, { 0 }, 0, NULL, NULL, NULL, NULL, NULL }; |
| |
| |
| #if !SDL_JOYSTICK_DISABLED |
| |
| static SDL_bool SDL_update_joysticks = SDL_TRUE; |
| |
| static void |
| SDL_CalculateShouldUpdateJoysticks() |
| { |
| if (SDL_GetHintBoolean(SDL_HINT_AUTO_UPDATE_JOYSTICKS, SDL_TRUE) && |
| (!SDL_disabled_events[SDL_JOYAXISMOTION >> 8] || SDL_JoystickEventState(SDL_QUERY))) { |
| SDL_update_joysticks = SDL_TRUE; |
| } else { |
| SDL_update_joysticks = SDL_FALSE; |
| } |
| } |
| |
| static void SDLCALL |
| SDL_AutoUpdateJoysticksChanged(void *userdata, const char *name, const char *oldValue, const char *hint) |
| { |
| SDL_CalculateShouldUpdateJoysticks(); |
| } |
| |
| #endif /* !SDL_JOYSTICK_DISABLED */ |
| |
| |
| #if !SDL_SENSOR_DISABLED |
| |
| static SDL_bool SDL_update_sensors = SDL_TRUE; |
| |
| static void |
| SDL_CalculateShouldUpdateSensors() |
| { |
| if (SDL_GetHintBoolean(SDL_HINT_AUTO_UPDATE_SENSORS, SDL_TRUE) && |
| !SDL_disabled_events[SDL_SENSORUPDATE >> 8]) { |
| SDL_update_sensors = SDL_TRUE; |
| } else { |
| SDL_update_sensors = SDL_FALSE; |
| } |
| } |
| |
| static void SDLCALL |
| SDL_AutoUpdateSensorsChanged(void *userdata, const char *name, const char *oldValue, const char *hint) |
| { |
| SDL_CalculateShouldUpdateSensors(); |
| } |
| |
| #endif /* !SDL_SENSOR_DISABLED */ |
| |
| |
| /* 0 (default) means no logging, 1 means logging, 2 means logging with mouse and finger motion */ |
| static int SDL_DoEventLogging = 0; |
| |
| static void SDLCALL |
| SDL_EventLoggingChanged(void *userdata, const char *name, const char *oldValue, const char *hint) |
| { |
| SDL_DoEventLogging = (hint && *hint) ? SDL_max(SDL_min(SDL_atoi(hint), 2), 0) : 0; |
| } |
| |
| static void |
| SDL_LogEvent(const SDL_Event *event) |
| { |
| char name[32]; |
| char details[128]; |
| |
| /* mouse/finger motion are spammy, ignore these if they aren't demanded. */ |
| if ( (SDL_DoEventLogging < 2) && |
| ( (event->type == SDL_MOUSEMOTION) || |
| (event->type == SDL_FINGERMOTION) ) ) { |
| return; |
| } |
| |
| /* this is to make SDL_snprintf() calls cleaner. */ |
| #define uint unsigned int |
| |
| name[0] = '\0'; |
| details[0] = '\0'; |
| |
| /* !!! FIXME: This code is kinda ugly, sorry. */ |
| |
| if ((event->type >= SDL_USEREVENT) && (event->type <= SDL_LASTEVENT)) { |
| char plusstr[16]; |
| SDL_strlcpy(name, "SDL_USEREVENT", sizeof (name)); |
| if (event->type > SDL_USEREVENT) { |
| SDL_snprintf(plusstr, sizeof (plusstr), "+%u", ((uint) event->type) - SDL_USEREVENT); |
| } else { |
| plusstr[0] = '\0'; |
| } |
| SDL_snprintf(details, sizeof (details), "%s (timestamp=%u windowid=%u code=%d data1=%p data2=%p)", |
| plusstr, (uint) event->user.timestamp, (uint) event->user.windowID, |
| (int) event->user.code, event->user.data1, event->user.data2); |
| } |
| |
| switch (event->type) { |
| #define SDL_EVENT_CASE(x) case x: SDL_strlcpy(name, #x, sizeof (name)); |
| SDL_EVENT_CASE(SDL_FIRSTEVENT) SDL_strlcpy(details, " (THIS IS PROBABLY A BUG!)", sizeof (details)); break; |
| SDL_EVENT_CASE(SDL_QUIT) SDL_snprintf(details, sizeof (details), " (timestamp=%u)", (uint) event->quit.timestamp); break; |
| SDL_EVENT_CASE(SDL_APP_TERMINATING) break; |
| SDL_EVENT_CASE(SDL_APP_LOWMEMORY) break; |
| SDL_EVENT_CASE(SDL_APP_WILLENTERBACKGROUND) break; |
| SDL_EVENT_CASE(SDL_APP_DIDENTERBACKGROUND) break; |
| SDL_EVENT_CASE(SDL_APP_WILLENTERFOREGROUND) break; |
| SDL_EVENT_CASE(SDL_APP_DIDENTERFOREGROUND) break; |
| SDL_EVENT_CASE(SDL_KEYMAPCHANGED) break; |
| SDL_EVENT_CASE(SDL_CLIPBOARDUPDATE) break; |
| SDL_EVENT_CASE(SDL_RENDER_TARGETS_RESET) break; |
| SDL_EVENT_CASE(SDL_RENDER_DEVICE_RESET) break; |
| |
| SDL_EVENT_CASE(SDL_WINDOWEVENT) { |
| char name2[64]; |
| switch(event->window.event) { |
| case SDL_WINDOWEVENT_NONE: SDL_strlcpy(name2, "SDL_WINDOWEVENT_NONE (THIS IS PROBABLY A BUG!)", sizeof (name2)); break; |
| #define SDL_WINDOWEVENT_CASE(x) case x: SDL_strlcpy(name2, #x, sizeof (name2)); break |
| SDL_WINDOWEVENT_CASE(SDL_WINDOWEVENT_SHOWN); |
| SDL_WINDOWEVENT_CASE(SDL_WINDOWEVENT_HIDDEN); |
| SDL_WINDOWEVENT_CASE(SDL_WINDOWEVENT_EXPOSED); |
| SDL_WINDOWEVENT_CASE(SDL_WINDOWEVENT_MOVED); |
| SDL_WINDOWEVENT_CASE(SDL_WINDOWEVENT_RESIZED); |
| SDL_WINDOWEVENT_CASE(SDL_WINDOWEVENT_SIZE_CHANGED); |
| SDL_WINDOWEVENT_CASE(SDL_WINDOWEVENT_MINIMIZED); |
| SDL_WINDOWEVENT_CASE(SDL_WINDOWEVENT_MAXIMIZED); |
| SDL_WINDOWEVENT_CASE(SDL_WINDOWEVENT_RESTORED); |
| SDL_WINDOWEVENT_CASE(SDL_WINDOWEVENT_ENTER); |
| SDL_WINDOWEVENT_CASE(SDL_WINDOWEVENT_LEAVE); |
| SDL_WINDOWEVENT_CASE(SDL_WINDOWEVENT_FOCUS_GAINED); |
| SDL_WINDOWEVENT_CASE(SDL_WINDOWEVENT_FOCUS_LOST); |
| SDL_WINDOWEVENT_CASE(SDL_WINDOWEVENT_CLOSE); |
| SDL_WINDOWEVENT_CASE(SDL_WINDOWEVENT_TAKE_FOCUS); |
| SDL_WINDOWEVENT_CASE(SDL_WINDOWEVENT_HIT_TEST); |
| #undef SDL_WINDOWEVENT_CASE |
| default: SDL_strlcpy(name2, "UNKNOWN (bug? fixme?)", sizeof (name2)); break; |
| } |
| SDL_snprintf(details, sizeof (details), " (timestamp=%u windowid=%u event=%s data1=%d data2=%d)", |
| (uint) event->window.timestamp, (uint) event->window.windowID, name2, (int) event->window.data1, (int) event->window.data2); |
| break; |
| } |
| |
| SDL_EVENT_CASE(SDL_SYSWMEVENT) |
| /* !!! FIXME: we don't delve further at the moment. */ |
| SDL_snprintf(details, sizeof (details), " (timestamp=%u)", (uint) event->syswm.timestamp); |
| break; |
| |
| #define PRINT_KEY_EVENT(event) \ |
| SDL_snprintf(details, sizeof (details), " (timestamp=%u windowid=%u state=%s repeat=%s scancode=%u keycode=%u mod=%u)", \ |
| (uint) event->key.timestamp, (uint) event->key.windowID, \ |
| event->key.state == SDL_PRESSED ? "pressed" : "released", \ |
| event->key.repeat ? "true" : "false", \ |
| (uint) event->key.keysym.scancode, \ |
| (uint) event->key.keysym.sym, \ |
| (uint) event->key.keysym.mod) |
| SDL_EVENT_CASE(SDL_KEYDOWN) PRINT_KEY_EVENT(event); break; |
| SDL_EVENT_CASE(SDL_KEYUP) PRINT_KEY_EVENT(event); break; |
| #undef PRINT_KEY_EVENT |
| |
| SDL_EVENT_CASE(SDL_TEXTEDITING) |
| SDL_snprintf(details, sizeof (details), " (timestamp=%u windowid=%u text='%s' start=%d length=%d)", |
| (uint) event->edit.timestamp, (uint) event->edit.windowID, |
| event->edit.text, (int) event->edit.start, (int) event->edit.length); |
| break; |
| |
| SDL_EVENT_CASE(SDL_TEXTINPUT) |
| SDL_snprintf(details, sizeof (details), " (timestamp=%u windowid=%u text='%s')", (uint) event->text.timestamp, (uint) event->text.windowID, event->text.text); |
| break; |
| |
| |
| SDL_EVENT_CASE(SDL_MOUSEMOTION) |
| SDL_snprintf(details, sizeof (details), " (timestamp=%u windowid=%u which=%u state=%u x=%d y=%d xrel=%d yrel=%d)", |
| (uint) event->motion.timestamp, (uint) event->motion.windowID, |
| (uint) event->motion.which, (uint) event->motion.state, |
| (int) event->motion.x, (int) event->motion.y, |
| (int) event->motion.xrel, (int) event->motion.yrel); |
| break; |
| |
| #define PRINT_MBUTTON_EVENT(event) \ |
| SDL_snprintf(details, sizeof (details), " (timestamp=%u windowid=%u which=%u button=%u state=%s clicks=%u x=%d y=%d)", \ |
| (uint) event->button.timestamp, (uint) event->button.windowID, \ |
| (uint) event->button.which, (uint) event->button.button, \ |
| event->button.state == SDL_PRESSED ? "pressed" : "released", \ |
| (uint) event->button.clicks, (int) event->button.x, (int) event->button.y) |
| SDL_EVENT_CASE(SDL_MOUSEBUTTONDOWN) PRINT_MBUTTON_EVENT(event); break; |
| SDL_EVENT_CASE(SDL_MOUSEBUTTONUP) PRINT_MBUTTON_EVENT(event); break; |
| #undef PRINT_MBUTTON_EVENT |
| |
| |
| SDL_EVENT_CASE(SDL_MOUSEWHEEL) |
| SDL_snprintf(details, sizeof (details), " (timestamp=%u windowid=%u which=%u x=%d y=%d direction=%s)", |
| (uint) event->wheel.timestamp, (uint) event->wheel.windowID, |
| (uint) event->wheel.which, (int) event->wheel.x, (int) event->wheel.y, |
| event->wheel.direction == SDL_MOUSEWHEEL_NORMAL ? "normal" : "flipped"); |
| break; |
| |
| SDL_EVENT_CASE(SDL_JOYAXISMOTION) |
| SDL_snprintf(details, sizeof (details), " (timestamp=%u which=%d axis=%u value=%d)", |
| (uint) event->jaxis.timestamp, (int) event->jaxis.which, |
| (uint) event->jaxis.axis, (int) event->jaxis.value); |
| break; |
| |
| SDL_EVENT_CASE(SDL_JOYBALLMOTION) |
| SDL_snprintf(details, sizeof (details), " (timestamp=%u which=%d ball=%u xrel=%d yrel=%d)", |
| (uint) event->jball.timestamp, (int) event->jball.which, |
| (uint) event->jball.ball, (int) event->jball.xrel, (int) event->jball.yrel); |
| break; |
| |
| SDL_EVENT_CASE(SDL_JOYHATMOTION) |
| SDL_snprintf(details, sizeof (details), " (timestamp=%u which=%d hat=%u value=%u)", |
| (uint) event->jhat.timestamp, (int) event->jhat.which, |
| (uint) event->jhat.hat, (uint) event->jhat.value); |
| break; |
| |
| #define PRINT_JBUTTON_EVENT(event) \ |
| SDL_snprintf(details, sizeof (details), " (timestamp=%u which=%d button=%u state=%s)", \ |
| (uint) event->jbutton.timestamp, (int) event->jbutton.which, \ |
| (uint) event->jbutton.button, event->jbutton.state == SDL_PRESSED ? "pressed" : "released") |
| SDL_EVENT_CASE(SDL_JOYBUTTONDOWN) PRINT_JBUTTON_EVENT(event); break; |
| SDL_EVENT_CASE(SDL_JOYBUTTONUP) PRINT_JBUTTON_EVENT(event); break; |
| #undef PRINT_JBUTTON_EVENT |
| |
| #define PRINT_JOYDEV_EVENT(event) SDL_snprintf(details, sizeof (details), " (timestamp=%u which=%d)", (uint) event->jdevice.timestamp, (int) event->jdevice.which) |
| SDL_EVENT_CASE(SDL_JOYDEVICEADDED) PRINT_JOYDEV_EVENT(event); break; |
| SDL_EVENT_CASE(SDL_JOYDEVICEREMOVED) PRINT_JOYDEV_EVENT(event); break; |
| #undef PRINT_JOYDEV_EVENT |
| |
| SDL_EVENT_CASE(SDL_CONTROLLERAXISMOTION) |
| SDL_snprintf(details, sizeof (details), " (timestamp=%u which=%d axis=%u value=%d)", |
| (uint) event->caxis.timestamp, (int) event->caxis.which, |
| (uint) event->caxis.axis, (int) event->caxis.value); |
| break; |
| |
| #define PRINT_CBUTTON_EVENT(event) \ |
| SDL_snprintf(details, sizeof (details), " (timestamp=%u which=%d button=%u state=%s)", \ |
| (uint) event->cbutton.timestamp, (int) event->cbutton.which, \ |
| (uint) event->cbutton.button, event->cbutton.state == SDL_PRESSED ? "pressed" : "released") |
| SDL_EVENT_CASE(SDL_CONTROLLERBUTTONDOWN) PRINT_CBUTTON_EVENT(event); break; |
| SDL_EVENT_CASE(SDL_CONTROLLERBUTTONUP) PRINT_CBUTTON_EVENT(event); break; |
| #undef PRINT_CBUTTON_EVENT |
| |
| #define PRINT_CONTROLLERDEV_EVENT(event) SDL_snprintf(details, sizeof (details), " (timestamp=%u which=%d)", (uint) event->cdevice.timestamp, (int) event->cdevice.which) |
| SDL_EVENT_CASE(SDL_CONTROLLERDEVICEADDED) PRINT_CONTROLLERDEV_EVENT(event); break; |
| SDL_EVENT_CASE(SDL_CONTROLLERDEVICEREMOVED) PRINT_CONTROLLERDEV_EVENT(event); break; |
| SDL_EVENT_CASE(SDL_CONTROLLERDEVICEREMAPPED) PRINT_CONTROLLERDEV_EVENT(event); break; |
| #undef PRINT_CONTROLLERDEV_EVENT |
| |
| #define PRINT_FINGER_EVENT(event) \ |
| SDL_snprintf(details, sizeof (details), " (timestamp=%u touchid=%"SDL_PRIs64" fingerid=%"SDL_PRIs64" x=%f y=%f dx=%f dy=%f pressure=%f)", \ |
| (uint) event->tfinger.timestamp, (long long)event->tfinger.touchId, \ |
| (long long)event->tfinger.fingerId, event->tfinger.x, event->tfinger.y, \ |
| event->tfinger.dx, event->tfinger.dy, event->tfinger.pressure) |
| SDL_EVENT_CASE(SDL_FINGERDOWN) PRINT_FINGER_EVENT(event); break; |
| SDL_EVENT_CASE(SDL_FINGERUP) PRINT_FINGER_EVENT(event); break; |
| SDL_EVENT_CASE(SDL_FINGERMOTION) PRINT_FINGER_EVENT(event); break; |
| #undef PRINT_FINGER_EVENT |
| |
| #define PRINT_DOLLAR_EVENT(event) \ |
| SDL_snprintf(details, sizeof (details), " (timestamp=%u touchid=%"SDL_PRIs64" gestureid=%"SDL_PRIs64" numfingers=%u error=%f x=%f y=%f)", \ |
| (uint) event->dgesture.timestamp, (long long)event->dgesture.touchId, \ |
| (long long)event->dgesture.gestureId, (uint) event->dgesture.numFingers, \ |
| event->dgesture.error, event->dgesture.x, event->dgesture.y); |
| SDL_EVENT_CASE(SDL_DOLLARGESTURE) PRINT_DOLLAR_EVENT(event); break; |
| SDL_EVENT_CASE(SDL_DOLLARRECORD) PRINT_DOLLAR_EVENT(event); break; |
| #undef PRINT_DOLLAR_EVENT |
| |
| SDL_EVENT_CASE(SDL_MULTIGESTURE) |
| SDL_snprintf(details, sizeof (details), " (timestamp=%u touchid=%"SDL_PRIs64" dtheta=%f ddist=%f x=%f y=%f numfingers=%u)", |
| (uint) event->mgesture.timestamp, (long long)event->mgesture.touchId, |
| event->mgesture.dTheta, event->mgesture.dDist, |
| event->mgesture.x, event->mgesture.y, (uint) event->mgesture.numFingers); |
| break; |
| |
| #define PRINT_DROP_EVENT(event) SDL_snprintf(details, sizeof (details), " (file='%s' timestamp=%u windowid=%u)", event->drop.file, (uint) event->drop.timestamp, (uint) event->drop.windowID) |
| SDL_EVENT_CASE(SDL_DROPFILE) PRINT_DROP_EVENT(event); break; |
| SDL_EVENT_CASE(SDL_DROPTEXT) PRINT_DROP_EVENT(event); break; |
| SDL_EVENT_CASE(SDL_DROPBEGIN) PRINT_DROP_EVENT(event); break; |
| SDL_EVENT_CASE(SDL_DROPCOMPLETE) PRINT_DROP_EVENT(event); break; |
| #undef PRINT_DROP_EVENT |
| |
| #define PRINT_AUDIODEV_EVENT(event) SDL_snprintf(details, sizeof (details), " (timestamp=%u which=%u iscapture=%s)", (uint) event->adevice.timestamp, (uint) event->adevice.which, event->adevice.iscapture ? "true" : "false"); |
| SDL_EVENT_CASE(SDL_AUDIODEVICEADDED) PRINT_AUDIODEV_EVENT(event); break; |
| SDL_EVENT_CASE(SDL_AUDIODEVICEREMOVED) PRINT_AUDIODEV_EVENT(event); break; |
| #undef PRINT_AUDIODEV_EVENT |
| |
| #undef SDL_EVENT_CASE |
| |
| default: |
| if (!name[0]) { |
| SDL_strlcpy(name, "UNKNOWN", sizeof (name)); |
| SDL_snprintf(details, sizeof (details), " #%u! (Bug? FIXME?)", (uint) event->type); |
| } |
| break; |
| } |
| |
| if (name[0]) { |
| SDL_Log("SDL EVENT: %s%s", name, details); |
| } |
| |
| #undef uint |
| } |
| |
| |
| |
| /* Public functions */ |
| |
| void |
| SDL_StopEventLoop(void) |
| { |
| const char *report = SDL_GetHint("SDL_EVENT_QUEUE_STATISTICS"); |
| int i; |
| SDL_EventEntry *entry; |
| SDL_SysWMEntry *wmmsg; |
| |
| if (SDL_EventQ.lock) { |
| SDL_LockMutex(SDL_EventQ.lock); |
| } |
| |
| SDL_AtomicSet(&SDL_EventQ.active, 0); |
| |
| if (report && SDL_atoi(report)) { |
| SDL_Log("SDL EVENT QUEUE: Maximum events in-flight: %d\n", |
| SDL_EventQ.max_events_seen); |
| } |
| |
| /* Clean out EventQ */ |
| for (entry = SDL_EventQ.head; entry; ) { |
| SDL_EventEntry *next = entry->next; |
| SDL_free(entry); |
| entry = next; |
| } |
| for (entry = SDL_EventQ.free; entry; ) { |
| SDL_EventEntry *next = entry->next; |
| SDL_free(entry); |
| entry = next; |
| } |
| for (wmmsg = SDL_EventQ.wmmsg_used; wmmsg; ) { |
| SDL_SysWMEntry *next = wmmsg->next; |
| SDL_free(wmmsg); |
| wmmsg = next; |
| } |
| for (wmmsg = SDL_EventQ.wmmsg_free; wmmsg; ) { |
| SDL_SysWMEntry *next = wmmsg->next; |
| SDL_free(wmmsg); |
| wmmsg = next; |
| } |
| |
| SDL_AtomicSet(&SDL_EventQ.count, 0); |
| SDL_EventQ.max_events_seen = 0; |
| SDL_EventQ.head = NULL; |
| SDL_EventQ.tail = NULL; |
| SDL_EventQ.free = NULL; |
| SDL_EventQ.wmmsg_used = NULL; |
| SDL_EventQ.wmmsg_free = NULL; |
| |
| /* Clear disabled event state */ |
| for (i = 0; i < SDL_arraysize(SDL_disabled_events); ++i) { |
| SDL_free(SDL_disabled_events[i]); |
| SDL_disabled_events[i] = NULL; |
| } |
| |
| if (SDL_event_watchers_lock) { |
| SDL_DestroyMutex(SDL_event_watchers_lock); |
| SDL_event_watchers_lock = NULL; |
| } |
| if (SDL_event_watchers) { |
| SDL_free(SDL_event_watchers); |
| SDL_event_watchers = NULL; |
| SDL_event_watchers_count = 0; |
| } |
| SDL_zero(SDL_EventOK); |
| |
| if (SDL_EventQ.lock) { |
| SDL_UnlockMutex(SDL_EventQ.lock); |
| SDL_DestroyMutex(SDL_EventQ.lock); |
| SDL_EventQ.lock = NULL; |
| } |
| } |
| |
| /* This function (and associated calls) may be called more than once */ |
| int |
| SDL_StartEventLoop(void) |
| { |
| /* We'll leave the event queue alone, since we might have gotten |
| some important events at launch (like SDL_DROPFILE) |
| |
| FIXME: Does this introduce any other bugs with events at startup? |
| */ |
| |
| /* Create the lock and set ourselves active */ |
| #if !SDL_THREADS_DISABLED |
| if (!SDL_EventQ.lock) { |
| SDL_EventQ.lock = SDL_CreateMutex(); |
| if (SDL_EventQ.lock == NULL) { |
| return -1; |
| } |
| } |
| |
| if (!SDL_event_watchers_lock) { |
| SDL_event_watchers_lock = SDL_CreateMutex(); |
| if (SDL_event_watchers_lock == NULL) { |
| return -1; |
| } |
| } |
| #endif /* !SDL_THREADS_DISABLED */ |
| |
| /* Process most event types */ |
| SDL_EventState(SDL_TEXTINPUT, SDL_DISABLE); |
| SDL_EventState(SDL_TEXTEDITING, SDL_DISABLE); |
| SDL_EventState(SDL_SYSWMEVENT, SDL_DISABLE); |
| #if 0 /* Leave these events enabled so apps can respond to items being dragged onto them at startup */ |
| SDL_EventState(SDL_DROPFILE, SDL_DISABLE); |
| SDL_EventState(SDL_DROPTEXT, SDL_DISABLE); |
| #endif |
| |
| SDL_AtomicSet(&SDL_EventQ.active, 1); |
| |
| return 0; |
| } |
| |
| |
| /* Add an event to the event queue -- called with the queue locked */ |
| static int |
| SDL_AddEvent(SDL_Event * event) |
| { |
| SDL_EventEntry *entry; |
| const int initial_count = SDL_AtomicGet(&SDL_EventQ.count); |
| int final_count; |
| |
| if (initial_count >= SDL_MAX_QUEUED_EVENTS) { |
| SDL_SetError("Event queue is full (%d events)", initial_count); |
| return 0; |
| } |
| |
| if (SDL_EventQ.free == NULL) { |
| entry = (SDL_EventEntry *)SDL_malloc(sizeof(*entry)); |
| if (!entry) { |
| return 0; |
| } |
| } else { |
| entry = SDL_EventQ.free; |
| SDL_EventQ.free = entry->next; |
| } |
| |
| if (SDL_DoEventLogging) { |
| SDL_LogEvent(event); |
| } |
| |
| entry->event = *event; |
| if (event->type == SDL_SYSWMEVENT) { |
| entry->msg = *event->syswm.msg; |
| entry->event.syswm.msg = &entry->msg; |
| } |
| |
| if (SDL_EventQ.tail) { |
| SDL_EventQ.tail->next = entry; |
| entry->prev = SDL_EventQ.tail; |
| SDL_EventQ.tail = entry; |
| entry->next = NULL; |
| } else { |
| SDL_assert(!SDL_EventQ.head); |
| SDL_EventQ.head = entry; |
| SDL_EventQ.tail = entry; |
| entry->prev = NULL; |
| entry->next = NULL; |
| } |
| |
| final_count = SDL_AtomicAdd(&SDL_EventQ.count, 1) + 1; |
| if (final_count > SDL_EventQ.max_events_seen) { |
| SDL_EventQ.max_events_seen = final_count; |
| } |
| |
| return 1; |
| } |
| |
| /* Remove an event from the queue -- called with the queue locked */ |
| static void |
| SDL_CutEvent(SDL_EventEntry *entry) |
| { |
| if (entry->prev) { |
| entry->prev->next = entry->next; |
| } |
| if (entry->next) { |
| entry->next->prev = entry->prev; |
| } |
| |
| if (entry == SDL_EventQ.head) { |
| SDL_assert(entry->prev == NULL); |
| SDL_EventQ.head = entry->next; |
| } |
| if (entry == SDL_EventQ.tail) { |
| SDL_assert(entry->next == NULL); |
| SDL_EventQ.tail = entry->prev; |
| } |
| |
| entry->next = SDL_EventQ.free; |
| SDL_EventQ.free = entry; |
| SDL_assert(SDL_AtomicGet(&SDL_EventQ.count) > 0); |
| SDL_AtomicAdd(&SDL_EventQ.count, -1); |
| } |
| |
| /* Lock the event queue, take a peep at it, and unlock it */ |
| int |
| SDL_PeepEvents(SDL_Event * events, int numevents, SDL_eventaction action, |
| Uint32 minType, Uint32 maxType) |
| { |
| int i, used; |
| |
| /* Don't look after we've quit */ |
| if (!SDL_AtomicGet(&SDL_EventQ.active)) { |
| /* We get a few spurious events at shutdown, so don't warn then */ |
| if (action != SDL_ADDEVENT) { |
| SDL_SetError("The event system has been shut down"); |
| } |
| return (-1); |
| } |
| /* Lock the event queue */ |
| used = 0; |
| if (!SDL_EventQ.lock || SDL_LockMutex(SDL_EventQ.lock) == 0) { |
| if (action == SDL_ADDEVENT) { |
| for (i = 0; i < numevents; ++i) { |
| used += SDL_AddEvent(&events[i]); |
| } |
| } else { |
| SDL_EventEntry *entry, *next; |
| SDL_SysWMEntry *wmmsg, *wmmsg_next; |
| Uint32 type; |
| |
| if (action == SDL_GETEVENT) { |
| /* Clean out any used wmmsg data |
| FIXME: Do we want to retain the data for some period of time? |
| */ |
| for (wmmsg = SDL_EventQ.wmmsg_used; wmmsg; wmmsg = wmmsg_next) { |
| wmmsg_next = wmmsg->next; |
| wmmsg->next = SDL_EventQ.wmmsg_free; |
| SDL_EventQ.wmmsg_free = wmmsg; |
| } |
| SDL_EventQ.wmmsg_used = NULL; |
| } |
| |
| for (entry = SDL_EventQ.head; entry && (!events || used < numevents); entry = next) { |
| next = entry->next; |
| type = entry->event.type; |
| if (minType <= type && type <= maxType) { |
| if (events) { |
| events[used] = entry->event; |
| if (entry->event.type == SDL_SYSWMEVENT) { |
| /* We need to copy the wmmsg somewhere safe. |
| For now we'll guarantee it's valid at least until |
| the next call to SDL_PeepEvents() |
| */ |
| if (SDL_EventQ.wmmsg_free) { |
| wmmsg = SDL_EventQ.wmmsg_free; |
| SDL_EventQ.wmmsg_free = wmmsg->next; |
| } else { |
| wmmsg = (SDL_SysWMEntry *)SDL_malloc(sizeof(*wmmsg)); |
| } |
| wmmsg->msg = *entry->event.syswm.msg; |
| wmmsg->next = SDL_EventQ.wmmsg_used; |
| SDL_EventQ.wmmsg_used = wmmsg; |
| events[used].syswm.msg = &wmmsg->msg; |
| } |
| |
| if (action == SDL_GETEVENT) { |
| SDL_CutEvent(entry); |
| } |
| } |
| ++used; |
| } |
| } |
| } |
| if (SDL_EventQ.lock) { |
| SDL_UnlockMutex(SDL_EventQ.lock); |
| } |
| } else { |
| return SDL_SetError("Couldn't lock event queue"); |
| } |
| return (used); |
| } |
| |
| SDL_bool |
| SDL_HasEvent(Uint32 type) |
| { |
| return (SDL_PeepEvents(NULL, 0, SDL_PEEKEVENT, type, type) > 0); |
| } |
| |
| SDL_bool |
| SDL_HasEvents(Uint32 minType, Uint32 maxType) |
| { |
| return (SDL_PeepEvents(NULL, 0, SDL_PEEKEVENT, minType, maxType) > 0); |
| } |
| |
| void |
| SDL_FlushEvent(Uint32 type) |
| { |
| SDL_FlushEvents(type, type); |
| } |
| |
| void |
| SDL_FlushEvents(Uint32 minType, Uint32 maxType) |
| { |
| /* !!! FIXME: we need to manually SDL_free() the strings in TEXTINPUT and |
| drag'n'drop events if we're flushing them without passing them to the |
| app, but I don't know if this is the right place to do that. */ |
| |
| /* Don't look after we've quit */ |
| if (!SDL_AtomicGet(&SDL_EventQ.active)) { |
| return; |
| } |
| |
| /* Make sure the events are current */ |
| #if 0 |
| /* Actually, we can't do this since we might be flushing while processing |
| a resize event, and calling this might trigger further resize events. |
| */ |
| SDL_PumpEvents(); |
| #endif |
| |
| /* Lock the event queue */ |
| if (!SDL_EventQ.lock || SDL_LockMutex(SDL_EventQ.lock) == 0) { |
| SDL_EventEntry *entry, *next; |
| Uint32 type; |
| for (entry = SDL_EventQ.head; entry; entry = next) { |
| next = entry->next; |
| type = entry->event.type; |
| if (minType <= type && type <= maxType) { |
| SDL_CutEvent(entry); |
| } |
| } |
| if (SDL_EventQ.lock) { |
| SDL_UnlockMutex(SDL_EventQ.lock); |
| } |
| } |
| } |
| |
| /* Run the system dependent event loops */ |
| void |
| SDL_PumpEvents(void) |
| { |
| SDL_VideoDevice *_this = SDL_GetVideoDevice(); |
| |
| /* Release any keys held down from last frame */ |
| SDL_ReleaseAutoReleaseKeys(); |
| |
| /* Get events from the video subsystem */ |
| if (_this) { |
| _this->PumpEvents(_this); |
| } |
| |
| #if !SDL_JOYSTICK_DISABLED |
| /* Check for joystick state change */ |
| if (SDL_update_joysticks) { |
| SDL_JoystickUpdate(); |
| } |
| #endif |
| |
| #if !SDL_SENSOR_DISABLED |
| /* Check for sensor state change */ |
| if (SDL_update_sensors) { |
| SDL_SensorUpdate(); |
| } |
| #endif |
| |
| SDL_SendPendingSignalEvents(); /* in case we had a signal handler fire, etc. */ |
| } |
| |
| /* Public functions */ |
| |
| int |
| SDL_PollEvent(SDL_Event * event) |
| { |
| return SDL_WaitEventTimeout(event, 0); |
| } |
| |
| int |
| SDL_WaitEvent(SDL_Event * event) |
| { |
| return SDL_WaitEventTimeout(event, -1); |
| } |
| |
| int |
| SDL_WaitEventTimeout(SDL_Event * event, int timeout) |
| { |
| Uint32 expiration = 0; |
| |
| if (timeout > 0) |
| expiration = SDL_GetTicks() + timeout; |
| |
| for (;;) { |
| SDL_PumpEvents(); |
| switch (SDL_PeepEvents(event, 1, SDL_GETEVENT, SDL_FIRSTEVENT, SDL_LASTEVENT)) { |
| case -1: |
| return 0; |
| case 0: |
| if (timeout == 0) { |
| /* Polling and no events, just return */ |
| return 0; |
| } |
| if (timeout > 0 && SDL_TICKS_PASSED(SDL_GetTicks(), expiration)) { |
| /* Timeout expired and no events */ |
| return 0; |
| } |
| SDL_Delay(1); |
| break; |
| default: |
| /* Has events */ |
| return 1; |
| } |
| } |
| } |
| |
| int |
| SDL_PushEvent(SDL_Event * event) |
| { |
| event->common.timestamp = SDL_GetTicks(); |
| |
| if (SDL_EventOK.callback || SDL_event_watchers_count > 0) { |
| if (!SDL_event_watchers_lock || SDL_LockMutex(SDL_event_watchers_lock) == 0) { |
| if (SDL_EventOK.callback && !SDL_EventOK.callback(SDL_EventOK.userdata, event)) { |
| if (SDL_event_watchers_lock) { |
| SDL_UnlockMutex(SDL_event_watchers_lock); |
| } |
| return 0; |
| } |
| |
| if (SDL_event_watchers_count > 0) { |
| /* Make sure we only dispatch the current watcher list */ |
| int i, event_watchers_count = SDL_event_watchers_count; |
| |
| SDL_event_watchers_dispatching = SDL_TRUE; |
| for (i = 0; i < event_watchers_count; ++i) { |
| if (!SDL_event_watchers[i].removed) { |
| SDL_event_watchers[i].callback(SDL_event_watchers[i].userdata, event); |
| } |
| } |
| SDL_event_watchers_dispatching = SDL_FALSE; |
| |
| if (SDL_event_watchers_removed) { |
| for (i = SDL_event_watchers_count; i--; ) { |
| if (SDL_event_watchers[i].removed) { |
| --SDL_event_watchers_count; |
| if (i < SDL_event_watchers_count) { |
| SDL_memmove(&SDL_event_watchers[i], &SDL_event_watchers[i+1], (SDL_event_watchers_count - i) * sizeof(SDL_event_watchers[i])); |
| } |
| } |
| } |
| SDL_event_watchers_removed = SDL_FALSE; |
| } |
| } |
| |
| if (SDL_event_watchers_lock) { |
| SDL_UnlockMutex(SDL_event_watchers_lock); |
| } |
| } |
| } |
| |
| if (SDL_PeepEvents(event, 1, SDL_ADDEVENT, 0, 0) <= 0) { |
| return -1; |
| } |
| |
| SDL_GestureProcessEvent(event); |
| |
| return 1; |
| } |
| |
| void |
| SDL_SetEventFilter(SDL_EventFilter filter, void *userdata) |
| { |
| if (!SDL_event_watchers_lock || SDL_LockMutex(SDL_event_watchers_lock) == 0) { |
| /* Set filter and discard pending events */ |
| SDL_EventOK.callback = filter; |
| SDL_EventOK.userdata = userdata; |
| SDL_FlushEvents(SDL_FIRSTEVENT, SDL_LASTEVENT); |
| |
| if (SDL_event_watchers_lock) { |
| SDL_UnlockMutex(SDL_event_watchers_lock); |
| } |
| } |
| } |
| |
| SDL_bool |
| SDL_GetEventFilter(SDL_EventFilter * filter, void **userdata) |
| { |
| SDL_EventWatcher event_ok; |
| |
| if (!SDL_event_watchers_lock || SDL_LockMutex(SDL_event_watchers_lock) == 0) { |
| event_ok = SDL_EventOK; |
| |
| if (SDL_event_watchers_lock) { |
| SDL_UnlockMutex(SDL_event_watchers_lock); |
| } |
| } else { |
| SDL_zero(event_ok); |
| } |
| |
| if (filter) { |
| *filter = event_ok.callback; |
| } |
| if (userdata) { |
| *userdata = event_ok.userdata; |
| } |
| return event_ok.callback ? SDL_TRUE : SDL_FALSE; |
| } |
| |
| void |
| SDL_AddEventWatch(SDL_EventFilter filter, void *userdata) |
| { |
| if (!SDL_event_watchers_lock || SDL_LockMutex(SDL_event_watchers_lock) == 0) { |
| SDL_EventWatcher *event_watchers; |
| |
| event_watchers = SDL_realloc(SDL_event_watchers, (SDL_event_watchers_count + 1) * sizeof(*event_watchers)); |
| if (event_watchers) { |
| SDL_EventWatcher *watcher; |
| |
| SDL_event_watchers = event_watchers; |
| watcher = &SDL_event_watchers[SDL_event_watchers_count]; |
| watcher->callback = filter; |
| watcher->userdata = userdata; |
| watcher->removed = SDL_FALSE; |
| ++SDL_event_watchers_count; |
| } |
| |
| if (SDL_event_watchers_lock) { |
| SDL_UnlockMutex(SDL_event_watchers_lock); |
| } |
| } |
| } |
| |
| void |
| SDL_DelEventWatch(SDL_EventFilter filter, void *userdata) |
| { |
| if (!SDL_event_watchers_lock || SDL_LockMutex(SDL_event_watchers_lock) == 0) { |
| int i; |
| |
| for (i = 0; i < SDL_event_watchers_count; ++i) { |
| if (SDL_event_watchers[i].callback == filter && SDL_event_watchers[i].userdata == userdata) { |
| if (SDL_event_watchers_dispatching) { |
| SDL_event_watchers[i].removed = SDL_TRUE; |
| SDL_event_watchers_removed = SDL_TRUE; |
| } else { |
| --SDL_event_watchers_count; |
| if (i < SDL_event_watchers_count) { |
| SDL_memmove(&SDL_event_watchers[i], &SDL_event_watchers[i+1], (SDL_event_watchers_count - i) * sizeof(SDL_event_watchers[i])); |
| } |
| } |
| break; |
| } |
| } |
| |
| if (SDL_event_watchers_lock) { |
| SDL_UnlockMutex(SDL_event_watchers_lock); |
| } |
| } |
| } |
| |
| void |
| SDL_FilterEvents(SDL_EventFilter filter, void *userdata) |
| { |
| if (!SDL_EventQ.lock || SDL_LockMutex(SDL_EventQ.lock) == 0) { |
| SDL_EventEntry *entry, *next; |
| for (entry = SDL_EventQ.head; entry; entry = next) { |
| next = entry->next; |
| if (!filter(userdata, &entry->event)) { |
| SDL_CutEvent(entry); |
| } |
| } |
| if (SDL_EventQ.lock) { |
| SDL_UnlockMutex(SDL_EventQ.lock); |
| } |
| } |
| } |
| |
| Uint8 |
| SDL_EventState(Uint32 type, int state) |
| { |
| const SDL_bool isdnd = ((state == SDL_DISABLE) || (state == SDL_ENABLE)) && |
| ((type == SDL_DROPFILE) || (type == SDL_DROPTEXT)); |
| Uint8 current_state; |
| Uint8 hi = ((type >> 8) & 0xff); |
| Uint8 lo = (type & 0xff); |
| |
| if (SDL_disabled_events[hi] && |
| (SDL_disabled_events[hi]->bits[lo/32] & (1 << (lo&31)))) { |
| current_state = SDL_DISABLE; |
| } else { |
| current_state = SDL_ENABLE; |
| } |
| |
| if (state != current_state) |
| { |
| switch (state) { |
| case SDL_DISABLE: |
| /* Disable this event type and discard pending events */ |
| if (!SDL_disabled_events[hi]) { |
| SDL_disabled_events[hi] = (SDL_DisabledEventBlock*) SDL_calloc(1, sizeof(SDL_DisabledEventBlock)); |
| if (!SDL_disabled_events[hi]) { |
| /* Out of memory, nothing we can do... */ |
| break; |
| } |
| } |
| SDL_disabled_events[hi]->bits[lo/32] |= (1 << (lo&31)); |
| SDL_FlushEvent(type); |
| break; |
| case SDL_ENABLE: |
| SDL_disabled_events[hi]->bits[lo/32] &= ~(1 << (lo&31)); |
| break; |
| default: |
| /* Querying state... */ |
| break; |
| } |
| |
| #if !SDL_JOYSTICK_DISABLED |
| if (state == SDL_DISABLE || state == SDL_ENABLE) { |
| SDL_CalculateShouldUpdateJoysticks(); |
| } |
| #endif |
| #if !SDL_SENSOR_DISABLED |
| if (state == SDL_DISABLE || state == SDL_ENABLE) { |
| SDL_CalculateShouldUpdateSensors(); |
| } |
| #endif |
| } |
| |
| /* turn off drag'n'drop support if we've disabled the events. |
| This might change some UI details at the OS level. */ |
| if (isdnd) { |
| SDL_ToggleDragAndDropSupport(); |
| } |
| |
| return current_state; |
| } |
| |
| Uint32 |
| SDL_RegisterEvents(int numevents) |
| { |
| Uint32 event_base; |
| |
| if ((numevents > 0) && (SDL_userevents+numevents <= SDL_LASTEVENT)) { |
| event_base = SDL_userevents; |
| SDL_userevents += numevents; |
| } else { |
| event_base = (Uint32)-1; |
| } |
| return event_base; |
| } |
| |
| int |
| SDL_SendAppEvent(SDL_EventType eventType) |
| { |
| int posted; |
| |
| posted = 0; |
| if (SDL_GetEventState(eventType) == SDL_ENABLE) { |
| SDL_Event event; |
| event.type = eventType; |
| posted = (SDL_PushEvent(&event) > 0); |
| } |
| return (posted); |
| } |
| |
| int |
| SDL_SendSysWMEvent(SDL_SysWMmsg * message) |
| { |
| int posted; |
| |
| posted = 0; |
| if (SDL_GetEventState(SDL_SYSWMEVENT) == SDL_ENABLE) { |
| SDL_Event event; |
| SDL_memset(&event, 0, sizeof(event)); |
| event.type = SDL_SYSWMEVENT; |
| event.syswm.msg = message; |
| posted = (SDL_PushEvent(&event) > 0); |
| } |
| /* Update internal event state */ |
| return (posted); |
| } |
| |
| int |
| SDL_SendKeymapChangedEvent(void) |
| { |
| return SDL_SendAppEvent(SDL_KEYMAPCHANGED); |
| } |
| |
| int |
| SDL_SendLocaleChangedEvent(void) |
| { |
| return SDL_SendAppEvent(SDL_LOCALECHANGED); |
| } |
| |
| int |
| SDL_EventsInit(void) |
| { |
| #if !SDL_JOYSTICK_DISABLED |
| SDL_AddHintCallback(SDL_HINT_AUTO_UPDATE_JOYSTICKS, SDL_AutoUpdateJoysticksChanged, NULL); |
| #endif |
| #if !SDL_SENSOR_DISABLED |
| SDL_AddHintCallback(SDL_HINT_AUTO_UPDATE_SENSORS, SDL_AutoUpdateSensorsChanged, NULL); |
| #endif |
| SDL_AddHintCallback(SDL_HINT_EVENT_LOGGING, SDL_EventLoggingChanged, NULL); |
| if (SDL_StartEventLoop() < 0) { |
| SDL_DelHintCallback(SDL_HINT_EVENT_LOGGING, SDL_EventLoggingChanged, NULL); |
| return -1; |
| } |
| |
| SDL_QuitInit(); |
| |
| return 0; |
| } |
| |
| void |
| SDL_EventsQuit(void) |
| { |
| SDL_QuitQuit(); |
| SDL_StopEventLoop(); |
| SDL_DelHintCallback(SDL_HINT_EVENT_LOGGING, SDL_EventLoggingChanged, NULL); |
| #if !SDL_JOYSTICK_DISABLED |
| SDL_DelHintCallback(SDL_HINT_AUTO_UPDATE_JOYSTICKS, SDL_AutoUpdateJoysticksChanged, NULL); |
| #endif |
| #if !SDL_SENSOR_DISABLED |
| SDL_DelHintCallback(SDL_HINT_AUTO_UPDATE_SENSORS, SDL_AutoUpdateSensorsChanged, NULL); |
| #endif |
| } |
| |
| /* vi: set ts=4 sw=4 expandtab: */ |
