src/events/SDL_events.c
author Ryan C. Gordon <icculus@icculus.org>
Sun, 24 Nov 2013 23:56:17 -0500
changeset 8093 b43765095a6f
parent 7860 2b0bcdea3a79
child 8149 681eb46b8ac4
permissions -rw-r--r--
Make internal SDL sources include SDL_internal.h instead of SDL_config.h

The new header will include SDL_config.h, but allows for other global stuff.
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/*
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  Simple DirectMedia Layer
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  Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
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  This software is provided 'as-is', without any express or implied
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  warranty.  In no event will the authors be held liable for any damages
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  arising from the use of this software.
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  Permission is granted to anyone to use this software for any purpose,
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  including commercial applications, and to alter it and redistribute it
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  freely, subject to the following restrictions:
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  1. The origin of this software must not be misrepresented; you must not
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     claim that you wrote the original software. If you use this software
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     in a product, an acknowledgment in the product documentation would be
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     appreciated but is not required.
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  2. Altered source versions must be plainly marked as such, and must not be
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     misrepresented as being the original software.
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  3. This notice may not be removed or altered from any source distribution.
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*/
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#include "../SDL_internal.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_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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#include "../video/SDL_sysvideo.h"
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/* An arbitrary limit so we don't have unbounded growth */
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#define SDL_MAX_QUEUED_EVENTS   65535
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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 SDL_EventWatcher {
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    SDL_EventFilter callback;
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    void *userdata;
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    struct SDL_EventWatcher *next;
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} SDL_EventWatcher;
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static SDL_EventWatcher *SDL_event_watchers = NULL;
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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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typedef struct _SDL_EventEntry
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{
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    SDL_Event event;
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    SDL_SysWMmsg msg;
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    struct _SDL_EventEntry *prev;
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    struct _SDL_EventEntry *next;
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} SDL_EventEntry;
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typedef struct _SDL_SysWMEntry
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{
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    SDL_SysWMmsg msg;
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    struct _SDL_SysWMEntry *next;
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} SDL_SysWMEntry;
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static struct
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{
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    SDL_mutex *lock;
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    volatile SDL_bool active;
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    volatile int count;
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    SDL_EventEntry *head;
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    SDL_EventEntry *tail;
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    SDL_EventEntry *free;
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    SDL_SysWMEntry *wmmsg_used;
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    SDL_SysWMEntry *wmmsg_free;
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} SDL_EventQ = { NULL, SDL_TRUE };
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static SDL_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_disabled_events[SDL_JOYAXISMOTION >> 8] ||
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         SDL_JoystickEventState(SDL_QUERY)) &&
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        SDL_PrivateJoystickNeedsPolling()) {
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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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/* Public functions */
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void
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SDL_StopEventLoop(void)
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{
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    int i;
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    SDL_EventEntry *entry;
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    SDL_SysWMEntry *wmmsg;
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    if (SDL_EventQ.lock) {
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        SDL_LockMutex(SDL_EventQ.lock);
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    }
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    SDL_EventQ.active = SDL_FALSE;
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    /* Clean out EventQ */
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    for (entry = SDL_EventQ.head; entry; ) {
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        SDL_EventEntry *next = entry->next;
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        SDL_free(entry);
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        entry = next;
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    }
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    for (entry = SDL_EventQ.free; entry; ) {
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        SDL_EventEntry *next = entry->next;
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        SDL_free(entry);
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        entry = next;
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    }
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    for (wmmsg = SDL_EventQ.wmmsg_used; wmmsg; ) {
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        SDL_SysWMEntry *next = wmmsg->next;
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        SDL_free(wmmsg);
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        wmmsg = next;
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    }
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    for (wmmsg = SDL_EventQ.wmmsg_free; wmmsg; ) {
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        SDL_SysWMEntry *next = wmmsg->next;
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        SDL_free(wmmsg);
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        wmmsg = next;
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    }
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    SDL_EventQ.count = 0;
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    SDL_EventQ.head = NULL;
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    SDL_EventQ.tail = NULL;
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    SDL_EventQ.free = NULL;
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    SDL_EventQ.wmmsg_used = NULL;
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    SDL_EventQ.wmmsg_free = NULL;
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    /* Clear disabled event state */
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    for (i = 0; i < SDL_arraysize(SDL_disabled_events); ++i) {
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        SDL_free(SDL_disabled_events[i]);
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        SDL_disabled_events[i] = NULL;
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    }
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    while (SDL_event_watchers) {
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        SDL_EventWatcher *tmp = SDL_event_watchers;
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        SDL_event_watchers = tmp->next;
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        SDL_free(tmp);
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    }
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    SDL_EventOK = NULL;
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    if (SDL_EventQ.lock) {
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        SDL_UnlockMutex(SDL_EventQ.lock);
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        SDL_DestroyMutex(SDL_EventQ.lock);
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        SDL_EventQ.lock = NULL;
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    }
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}
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/* This function (and associated calls) may be called more than once */
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int
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SDL_StartEventLoop(void)
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{
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    /* We'll leave the event queue alone, since we might have gotten
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       some important events at launch (like SDL_DROPFILE)
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       FIXME: Does this introduce any other bugs with events at startup?
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     */
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    /* Create the lock and set ourselves active */
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#if !SDL_THREADS_DISABLED
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    if (!SDL_EventQ.lock) {
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        SDL_EventQ.lock = SDL_CreateMutex();
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    }
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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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    /* Process most event types */
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    SDL_EventState(SDL_TEXTINPUT, SDL_DISABLE);
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    SDL_EventState(SDL_TEXTEDITING, SDL_DISABLE);
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    SDL_EventState(SDL_SYSWMEVENT, SDL_DISABLE);
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    SDL_EventQ.active = SDL_TRUE;
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    return (0);
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}
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/* Add an event to the event queue -- called with the queue locked */
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static int
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SDL_AddEvent(SDL_Event * event)
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{
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    SDL_EventEntry *entry;
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    if (SDL_EventQ.count >= SDL_MAX_QUEUED_EVENTS) {
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        SDL_SetError("Event queue is full (%d events)", SDL_EventQ.count);
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        return 0;
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    }
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    if (SDL_EventQ.free == NULL) {
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        entry = (SDL_EventEntry *)SDL_malloc(sizeof(*entry));
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        if (!entry) {
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            return 0;
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        }
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    } else {
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        entry = SDL_EventQ.free;
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        SDL_EventQ.free = entry->next;
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    }
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    entry->event = *event;
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    if (event->type == SDL_SYSWMEVENT) {
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        entry->msg = *event->syswm.msg;
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        entry->event.syswm.msg = &entry->msg;
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    }
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    if (SDL_EventQ.tail) {
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        SDL_EventQ.tail->next = entry;
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        entry->prev = SDL_EventQ.tail;
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        SDL_EventQ.tail = entry;
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        entry->next = NULL;
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    } else {
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        SDL_assert(!SDL_EventQ.head);
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        SDL_EventQ.head = entry;
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        SDL_EventQ.tail = entry;
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        entry->prev = NULL;
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        entry->next = NULL;
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    }
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    ++SDL_EventQ.count;
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    return 1;
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}
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/* Remove an event from the queue -- called with the queue locked */
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static void
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SDL_CutEvent(SDL_EventEntry *entry)
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{
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    if (entry->prev) {
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        entry->prev->next = entry->next;
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    }
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    if (entry->next) {
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        entry->next->prev = entry->prev;
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    }
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    if (entry == SDL_EventQ.head) {
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        SDL_assert(entry->prev == NULL);
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        SDL_EventQ.head = entry->next;
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    }
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    if (entry == SDL_EventQ.tail) {
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        SDL_assert(entry->next == NULL);
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        SDL_EventQ.tail = entry->prev;
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    }
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    entry->next = SDL_EventQ.free;
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    SDL_EventQ.free = entry;
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    SDL_assert(SDL_EventQ.count > 0);
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    --SDL_EventQ.count;
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}
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/* Lock the event queue, take a peep at it, and unlock it */
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int
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SDL_PeepEvents(SDL_Event * events, int numevents, SDL_eventaction action,
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               Uint32 minType, Uint32 maxType)
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{
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    int i, used;
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    /* Don't look after we've quit */
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    if (!SDL_EventQ.active) {
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        /* We get a few spurious events at shutdown, so don't warn then */
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        if (action != SDL_ADDEVENT) {
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            SDL_SetError("The event system has been shut down");
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        }
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        return (-1);
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    }
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    /* Lock the event queue */
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    used = 0;
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    if (!SDL_EventQ.lock || SDL_LockMutex(SDL_EventQ.lock) == 0) {
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        if (action == SDL_ADDEVENT) {
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            for (i = 0; i < numevents; ++i) {
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                used += SDL_AddEvent(&events[i]);
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            }
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        } else {
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            SDL_EventEntry *entry, *next;
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            SDL_SysWMEntry *wmmsg, *wmmsg_next;
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            SDL_Event tmpevent;
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            Uint32 type;
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            /* If 'events' is NULL, just see if they exist */
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            if (events == NULL) {
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                action = SDL_PEEKEVENT;
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                numevents = 1;
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                events = &tmpevent;
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            }
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            /* Clean out any used wmmsg data
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               FIXME: Do we want to retain the data for some period of time?
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             */
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            for (wmmsg = SDL_EventQ.wmmsg_used; wmmsg; wmmsg = wmmsg_next) {
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                wmmsg_next = wmmsg->next;
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                wmmsg->next = SDL_EventQ.wmmsg_free;
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                SDL_EventQ.wmmsg_free = wmmsg;
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            }
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            SDL_EventQ.wmmsg_used = NULL;
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            for (entry = SDL_EventQ.head; entry && used < numevents; entry = next) {
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                next = entry->next;
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                type = entry->event.type;
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                if (minType <= type && type <= maxType) {
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                    events[used] = entry->event;
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                    if (entry->event.type == SDL_SYSWMEVENT) {
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                        /* We need to copy the wmmsg somewhere safe.
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                           For now we'll guarantee it's valid at least until
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                           the next call to SDL_PeepEvents()
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                         */
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                        SDL_SysWMEntry *wmmsg;
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                        if (SDL_EventQ.wmmsg_free) {
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                            wmmsg = SDL_EventQ.wmmsg_free;
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                            SDL_EventQ.wmmsg_free = wmmsg->next;
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                        } else {
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                            wmmsg = (SDL_SysWMEntry *)SDL_malloc(sizeof(*wmmsg));
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                        }
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                        wmmsg->msg = *entry->event.syswm.msg;
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                        wmmsg->next = SDL_EventQ.wmmsg_used;
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                        SDL_EventQ.wmmsg_used = wmmsg;
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                        events[used].syswm.msg = &wmmsg->msg;
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                    }
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                    ++used;
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                    if (action == SDL_GETEVENT) {
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                        SDL_CutEvent(entry);
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                    }
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                }
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            }
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        }
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        SDL_UnlockMutex(SDL_EventQ.lock);
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    } else {
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        return SDL_SetError("Couldn't lock event queue");
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    }
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    return (used);
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}
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SDL_bool
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SDL_HasEvent(Uint32 type)
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{
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    return (SDL_PeepEvents(NULL, 0, SDL_PEEKEVENT, type, type) > 0);
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}
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SDL_bool
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SDL_HasEvents(Uint32 minType, Uint32 maxType)
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{
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    return (SDL_PeepEvents(NULL, 0, SDL_PEEKEVENT, minType, maxType) > 0);
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}
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void
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SDL_FlushEvent(Uint32 type)
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{
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    SDL_FlushEvents(type, type);
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}
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void
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SDL_FlushEvents(Uint32 minType, Uint32 maxType)
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{
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    /* Don't look after we've quit */
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    if (!SDL_EventQ.active) {
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        return;
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    }
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    /* Make sure the events are current */
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#if 0
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    /* Actually, we can't do this since we might be flushing while processing
slouken@5293
   374
       a resize event, and calling this might trigger further resize events.
slouken@5293
   375
    */
slouken@4460
   376
    SDL_PumpEvents();
slouken@5293
   377
#endif
slouken@4460
   378
slouken@4429
   379
    /* Lock the event queue */
slouken@6977
   380
    if (SDL_LockMutex(SDL_EventQ.lock) == 0) {
slouken@7304
   381
        SDL_EventEntry *entry, *next;
slouken@7304
   382
        Uint32 type;
slouken@7304
   383
        for (entry = SDL_EventQ.head; entry; entry = next) {
slouken@7304
   384
            next = entry->next;
slouken@7304
   385
            type = entry->event.type;
slouken@4429
   386
            if (minType <= type && type <= maxType) {
slouken@7304
   387
                SDL_CutEvent(entry);
slouken@4429
   388
            }
slouken@4429
   389
        }
slouken@6977
   390
        SDL_UnlockMutex(SDL_EventQ.lock);
slouken@4429
   391
    }
slouken@0
   392
}
slouken@0
   393
slouken@0
   394
/* Run the system dependent event loops */
slouken@1895
   395
void
slouken@1895
   396
SDL_PumpEvents(void)
slouken@0
   397
{
slouken@5123
   398
    SDL_VideoDevice *_this = SDL_GetVideoDevice();
slouken@0
   399
slouken@5123
   400
    /* Get events from the video subsystem */
slouken@5123
   401
    if (_this) {
slouken@5123
   402
        _this->PumpEvents(_this);
slouken@5123
   403
    }
slouken@1361
   404
#if !SDL_JOYSTICK_DISABLED
slouken@5123
   405
    /* Check for joystick state change */
slouken@5123
   406
    if (SDL_ShouldPollJoystick()) {
slouken@5123
   407
        SDL_JoystickUpdate();
slouken@5123
   408
    }
slouken@0
   409
#endif
slouken@0
   410
}
slouken@0
   411
slouken@0
   412
/* Public functions */
slouken@0
   413
slouken@1895
   414
int
slouken@1895
   415
SDL_PollEvent(SDL_Event * event)
slouken@0
   416
{
slouken@3072
   417
    return SDL_WaitEventTimeout(event, 0);
slouken@0
   418
}
slouken@0
   419
slouken@1895
   420
int
slouken@1895
   421
SDL_WaitEvent(SDL_Event * event)
slouken@0
   422
{
slouken@3072
   423
    return SDL_WaitEventTimeout(event, -1);
slouken@3072
   424
}
slouken@3072
   425
slouken@3072
   426
int
slouken@3072
   427
SDL_WaitEventTimeout(SDL_Event * event, int timeout)
slouken@3072
   428
{
slouken@3072
   429
    Uint32 expiration = 0;
slouken@3072
   430
slouken@3072
   431
    if (timeout > 0)
slouken@3072
   432
        expiration = SDL_GetTicks() + timeout;
slouken@3072
   433
slouken@3072
   434
    for (;;) {
slouken@1895
   435
        SDL_PumpEvents();
slouken@4429
   436
        switch (SDL_PeepEvents(event, 1, SDL_GETEVENT, SDL_FIRSTEVENT, SDL_LASTEVENT)) {
slouken@1895
   437
        case -1:
slouken@1895
   438
            return 0;
slouken@1895
   439
        case 1:
slouken@1895
   440
            return 1;
slouken@1895
   441
        case 0:
slouken@3072
   442
            if (timeout == 0) {
slouken@3072
   443
                /* Polling and no events, just return */
slouken@3072
   444
                return 0;
slouken@3072
   445
            }
slouken@7857
   446
            if (timeout > 0 && SDL_TICKS_PASSED(SDL_GetTicks(), expiration)) {
slouken@3072
   447
                /* Timeout expired and no events */
slouken@3072
   448
                return 0;
slouken@3072
   449
            }
slouken@1895
   450
            SDL_Delay(10);
slouken@3072
   451
            break;
slouken@1895
   452
        }
slouken@1895
   453
    }
slouken@0
   454
}
slouken@0
   455
slouken@1895
   456
int
slouken@1895
   457
SDL_PushEvent(SDL_Event * event)
slouken@0
   458
{
slouken@5146
   459
    SDL_EventWatcher *curr;
slouken@7190
   460
dludwig@7082
   461
    event->common.timestamp = SDL_GetTicks();
slouken@7190
   462
slouken@1895
   463
    if (SDL_EventOK && !SDL_EventOK(SDL_EventOKParam, event)) {
slouken@1895
   464
        return 0;
slouken@1895
   465
    }
slouken@5146
   466
slouken@5146
   467
    for (curr = SDL_event_watchers; curr; curr = curr->next) {
slouken@5146
   468
        curr->callback(curr->userdata, event);
slouken@5146
   469
    }
slouken@5146
   470
slouken@4429
   471
    if (SDL_PeepEvents(event, 1, SDL_ADDEVENT, 0, 0) <= 0) {
slouken@1895
   472
        return -1;
slouken@1895
   473
    }
jim@4657
   474
jim@4657
   475
    SDL_GestureProcessEvent(event);
jim@4657
   476
slouken@1895
   477
    return 1;
slouken@0
   478
}
slouken@0
   479
slouken@1895
   480
void
slouken@1895
   481
SDL_SetEventFilter(SDL_EventFilter filter, void *userdata)
slouken@0
   482
{
slouken@1895
   483
    /* Set filter and discard pending events */
slouken@7201
   484
    SDL_EventOK = NULL;
slouken@7201
   485
    SDL_FlushEvents(SDL_FIRSTEVENT, SDL_LASTEVENT);
slouken@7201
   486
    SDL_EventOKParam = userdata;
slouken@1895
   487
    SDL_EventOK = filter;
slouken@0
   488
}
slouken@0
   489
slouken@1895
   490
SDL_bool
slouken@1895
   491
SDL_GetEventFilter(SDL_EventFilter * filter, void **userdata)
slouken@0
   492
{
slouken@1895
   493
    if (filter) {
slouken@1895
   494
        *filter = SDL_EventOK;
slouken@1895
   495
    }
slouken@1895
   496
    if (userdata) {
slouken@1895
   497
        *userdata = SDL_EventOKParam;
slouken@1895
   498
    }
slouken@1895
   499
    return SDL_EventOK ? SDL_TRUE : SDL_FALSE;
slouken@0
   500
}
slouken@0
   501
slouken@5146
   502
/* FIXME: This is not thread-safe yet */
slouken@5146
   503
void
slouken@5146
   504
SDL_AddEventWatch(SDL_EventFilter filter, void *userdata)
slouken@5146
   505
{
slouken@5146
   506
    SDL_EventWatcher *watcher;
slouken@5146
   507
slouken@5146
   508
    watcher = (SDL_EventWatcher *)SDL_malloc(sizeof(*watcher));
slouken@5146
   509
    if (!watcher) {
slouken@5146
   510
        /* Uh oh... */
slouken@5146
   511
        return;
slouken@5146
   512
    }
slouken@5146
   513
    watcher->callback = filter;
slouken@5146
   514
    watcher->userdata = userdata;
slouken@5146
   515
    watcher->next = SDL_event_watchers;
slouken@5146
   516
    SDL_event_watchers = watcher;
slouken@5146
   517
}
slouken@5146
   518
slouken@5146
   519
/* FIXME: This is not thread-safe yet */
slouken@5146
   520
void
slouken@5146
   521
SDL_DelEventWatch(SDL_EventFilter filter, void *userdata)
slouken@5146
   522
{
slouken@5146
   523
    SDL_EventWatcher *prev = NULL;
slouken@5146
   524
    SDL_EventWatcher *curr;
slouken@5146
   525
slouken@5146
   526
    for (curr = SDL_event_watchers; curr; prev = curr, curr = curr->next) {
slouken@5146
   527
        if (curr->callback == filter && curr->userdata == userdata) {
slouken@5146
   528
            if (prev) {
slouken@5146
   529
                prev->next = curr->next;
slouken@5146
   530
            } else {
slouken@5146
   531
                SDL_event_watchers = curr->next;
slouken@5146
   532
            }
slouken@5146
   533
            SDL_free(curr);
slouken@5146
   534
            break;
slouken@5146
   535
        }
slouken@5146
   536
    }
slouken@5146
   537
}
slouken@5146
   538
slouken@1895
   539
void
slouken@1895
   540
SDL_FilterEvents(SDL_EventFilter filter, void *userdata)
slouken@0
   541
{
slouken@6977
   542
    if (SDL_LockMutex(SDL_EventQ.lock) == 0) {
slouken@7304
   543
        SDL_EventEntry *entry, *next;
slouken@7304
   544
        for (entry = SDL_EventQ.head; entry; entry = next) {
slouken@7304
   545
            next = entry->next;
slouken@7304
   546
            if (!filter(userdata, &entry->event)) {
slouken@7304
   547
                SDL_CutEvent(entry);
slouken@1895
   548
            }
slouken@1895
   549
        }
slouken@7304
   550
        SDL_UnlockMutex(SDL_EventQ.lock);
slouken@1895
   551
    }
slouken@1895
   552
}
slouken@0
   553
slouken@1895
   554
Uint8
slouken@4429
   555
SDL_EventState(Uint32 type, int state)
slouken@1895
   556
{
slouken@1895
   557
    Uint8 current_state;
slouken@4429
   558
    Uint8 hi = ((type >> 8) & 0xff);
slouken@4429
   559
    Uint8 lo = (type & 0xff);
slouken@1895
   560
slouken@4429
   561
    if (SDL_disabled_events[hi] &&
slouken@4429
   562
        (SDL_disabled_events[hi]->bits[lo/32] & (1 << (lo&31)))) {
slouken@4429
   563
        current_state = SDL_DISABLE;
slouken@4429
   564
    } else {
slouken@4429
   565
        current_state = SDL_ENABLE;
slouken@1895
   566
    }
slouken@1895
   567
slouken@4429
   568
    if (state != current_state)
slouken@4429
   569
    {
slouken@4429
   570
        switch (state) {
slouken@4429
   571
        case SDL_DISABLE:
slouken@4429
   572
            /* Disable this event type and discard pending events */
slouken@4429
   573
            if (!SDL_disabled_events[hi]) {
slouken@4429
   574
                SDL_disabled_events[hi] = (SDL_DisabledEventBlock*) SDL_calloc(1, sizeof(SDL_DisabledEventBlock));
slouken@4429
   575
                if (!SDL_disabled_events[hi]) {
slouken@4429
   576
                    /* Out of memory, nothing we can do... */
slouken@4429
   577
                    break;
slouken@4429
   578
                }
slouken@4429
   579
            }
slouken@4429
   580
            SDL_disabled_events[hi]->bits[lo/32] |= (1 << (lo&31));
slouken@4429
   581
            SDL_FlushEvent(type);
slouken@4429
   582
            break;
slouken@4429
   583
        case SDL_ENABLE:
slouken@4429
   584
            SDL_disabled_events[hi]->bits[lo/32] &= ~(1 << (lo&31));
slouken@4429
   585
            break;
slouken@4429
   586
        default:
slouken@4429
   587
            /* Querying state... */
slouken@4429
   588
            break;
slouken@1895
   589
        }
slouken@1895
   590
    }
slouken@4429
   591
slouken@4429
   592
    return current_state;
slouken@4429
   593
}
slouken@4429
   594
slouken@4429
   595
Uint32
slouken@4429
   596
SDL_RegisterEvents(int numevents)
slouken@4429
   597
{
slouken@4429
   598
    Uint32 event_base;
slouken@4429
   599
icculus@7611
   600
    if ((numevents > 0) && (SDL_userevents+numevents <= SDL_LASTEVENT)) {
slouken@4429
   601
        event_base = SDL_userevents;
slouken@4429
   602
        SDL_userevents += numevents;
slouken@4429
   603
    } else {
slouken@4429
   604
        event_base = (Uint32)-1;
slouken@4429
   605
    }
slouken@4429
   606
    return event_base;
slouken@0
   607
}
slouken@0
   608
slouken@7190
   609
int
slouken@7190
   610
SDL_SendAppEvent(SDL_EventType eventType)
slouken@7190
   611
{
slouken@7190
   612
    int posted;
slouken@7190
   613
slouken@7190
   614
    posted = 0;
slouken@7190
   615
    if (SDL_GetEventState(eventType) == SDL_ENABLE) {
slouken@7190
   616
        SDL_Event event;
slouken@7190
   617
        event.type = eventType;
slouken@7190
   618
        posted = (SDL_PushEvent(&event) > 0);
slouken@7190
   619
    }
slouken@7190
   620
    return (posted);
slouken@7190
   621
}
slouken@7190
   622
slouken@1895
   623
int
slouken@1895
   624
SDL_SendSysWMEvent(SDL_SysWMmsg * message)
slouken@0
   625
{
slouken@1895
   626
    int posted;
slouken@0
   627
slouken@1895
   628
    posted = 0;
slouken@4429
   629
    if (SDL_GetEventState(SDL_SYSWMEVENT) == SDL_ENABLE) {
slouken@1895
   630
        SDL_Event event;
slouken@1895
   631
        SDL_memset(&event, 0, sizeof(event));
slouken@1895
   632
        event.type = SDL_SYSWMEVENT;
slouken@1895
   633
        event.syswm.msg = message;
slouken@1895
   634
        posted = (SDL_PushEvent(&event) > 0);
slouken@1895
   635
    }
slouken@1895
   636
    /* Update internal event state */
slouken@1895
   637
    return (posted);
slouken@0
   638
}
slouken@1895
   639
slouken@1895
   640
/* vi: set ts=4 sw=4 expandtab: */