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SDL_events.c
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/*
Simple DirectMedia Layer
Copyright (C) 1997-2025 Sam Lantinga <[email protected]>
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_events_c.h"
#include "../SDL_hints_c.h"
#include "../audio/SDL_audio_c.h"
#include "../camera/SDL_camera_c.h"
#include "../timer/SDL_timer_c.h"
#ifndef SDL_JOYSTICK_DISABLED
#include "../joystick/SDL_joystick_c.h"
#endif
#ifndef SDL_SENSOR_DISABLED
#include "../sensor/SDL_sensor_c.h"
#endif
#include "../video/SDL_sysvideo.h"
#ifdef SDL_PLATFORM_ANDROID
#include "../core/android/SDL_android.h"
#include "../video/android/SDL_androidevents.h"
#endif
// An arbitrary limit so we don't have unbounded growth
#define SDL_MAX_QUEUED_EVENTS 65535
// Determines how often we pump events if joystick or sensor subsystems are active
#define ENUMERATION_POLL_INTERVAL_NS (3 * SDL_NS_PER_SECOND)
// Determines how often to pump events if joysticks or sensors are actively being read
#define EVENT_POLL_INTERVAL_NS SDL_MS_TO_NS(1)
// Make sure the type in the SDL_Event aligns properly across the union
SDL_COMPILE_TIME_ASSERT(SDL_Event_type, sizeof(Uint32) == sizeof(SDL_EventType));
typedef struct SDL_EventWatcher
{
SDL_EventFilter callback;
void *userdata;
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 bool SDL_event_watchers_dispatching = false;
static bool SDL_event_watchers_removed = false;
static SDL_AtomicInt SDL_sentinel_pending;
static Uint32 SDL_last_event_id = 0;
typedef struct
{
Uint32 bits[8];
} SDL_DisabledEventBlock;
static SDL_DisabledEventBlock *SDL_disabled_events[256];
static Uint32 SDL_userevents = SDL_EVENT_USER;
typedef struct SDL_TemporaryMemory
{
void *memory;
struct SDL_TemporaryMemory *prev;
struct SDL_TemporaryMemory *next;
} SDL_TemporaryMemory;
typedef struct SDL_TemporaryMemoryState
{
SDL_TemporaryMemory *head;
SDL_TemporaryMemory *tail;
} SDL_TemporaryMemoryState;
static SDL_TLSID SDL_temporary_memory;
typedef struct SDL_EventEntry
{
SDL_Event event;
SDL_TemporaryMemory *memory;
struct SDL_EventEntry *prev;
struct SDL_EventEntry *next;
} SDL_EventEntry;
static struct
{
SDL_Mutex *lock;
bool active;
SDL_AtomicInt count;
int max_events_seen;
SDL_EventEntry *head;
SDL_EventEntry *tail;
SDL_EventEntry *free;
} SDL_EventQ = { NULL, false, { 0 }, 0, NULL, NULL, NULL };
static void SDL_CleanupTemporaryMemory(void *data)
{
SDL_TemporaryMemoryState *state = (SDL_TemporaryMemoryState *)data;
SDL_FreeTemporaryMemory();
SDL_free(state);
}
static SDL_TemporaryMemoryState *SDL_GetTemporaryMemoryState(bool create)
{
SDL_TemporaryMemoryState *state;
state = (SDL_TemporaryMemoryState *)SDL_GetTLS(&SDL_temporary_memory);
if (!state) {
if (!create) {
return NULL;
}
state = (SDL_TemporaryMemoryState *)SDL_calloc(1, sizeof(*state));
if (!state) {
return NULL;
}
if (!SDL_SetTLS(&SDL_temporary_memory, state, SDL_CleanupTemporaryMemory)) {
SDL_free(state);
return NULL;
}
}
return state;
}
static SDL_TemporaryMemory *SDL_GetTemporaryMemoryEntry(SDL_TemporaryMemoryState *state, const void *mem)
{
SDL_TemporaryMemory *entry;
// Start from the end, it's likely to have been recently allocated
for (entry = state->tail; entry; entry = entry->prev) {
if (mem == entry->memory) {
return entry;
}
}
return NULL;
}
static void SDL_LinkTemporaryMemoryEntry(SDL_TemporaryMemoryState *state, SDL_TemporaryMemory *entry)
{
entry->prev = state->tail;
entry->next = NULL;
if (state->tail) {
state->tail->next = entry;
} else {
state->head = entry;
}
state->tail = entry;
}
static void SDL_UnlinkTemporaryMemoryEntry(SDL_TemporaryMemoryState *state, SDL_TemporaryMemory *entry)
{
if (state->head == entry) {
state->head = entry->next;
}
if (state->tail == entry) {
state->tail = entry->prev;
}
if (entry->prev) {
entry->prev->next = entry->next;
}
if (entry->next) {
entry->next->prev = entry->prev;
}
entry->prev = NULL;
entry->next = NULL;
}
static void SDL_FreeTemporaryMemoryEntry(SDL_TemporaryMemoryState *state, SDL_TemporaryMemory *entry, bool free_data)
{
if (free_data) {
SDL_free(entry->memory);
}
SDL_free(entry);
}
static void SDL_LinkTemporaryMemoryToEvent(SDL_EventEntry *event, const void *mem)
{
SDL_TemporaryMemoryState *state;
SDL_TemporaryMemory *entry;
state = SDL_GetTemporaryMemoryState(false);
if (!state) {
return;
}
entry = SDL_GetTemporaryMemoryEntry(state, mem);
if (entry) {
SDL_UnlinkTemporaryMemoryEntry(state, entry);
entry->next = event->memory;
event->memory = entry;
}
}
// Transfer the event memory from the thread-local event memory list to the event
static void SDL_TransferTemporaryMemoryToEvent(SDL_EventEntry *event)
{
switch (event->event.type) {
case SDL_EVENT_TEXT_EDITING:
SDL_LinkTemporaryMemoryToEvent(event, event->event.edit.text);
break;
case SDL_EVENT_TEXT_EDITING_CANDIDATES:
SDL_LinkTemporaryMemoryToEvent(event, event->event.edit_candidates.candidates);
break;
case SDL_EVENT_TEXT_INPUT:
SDL_LinkTemporaryMemoryToEvent(event, event->event.text.text);
break;
case SDL_EVENT_DROP_BEGIN:
case SDL_EVENT_DROP_FILE:
case SDL_EVENT_DROP_TEXT:
case SDL_EVENT_DROP_COMPLETE:
case SDL_EVENT_DROP_POSITION:
SDL_LinkTemporaryMemoryToEvent(event, event->event.drop.source);
SDL_LinkTemporaryMemoryToEvent(event, event->event.drop.data);
break;
case SDL_EVENT_CLIPBOARD_UPDATE:
SDL_LinkTemporaryMemoryToEvent(event, event->event.clipboard.mime_types);
break;
default:
break;
}
}
// Transfer the event memory from the event to the thread-local event memory list
static void SDL_TransferTemporaryMemoryFromEvent(SDL_EventEntry *event)
{
SDL_TemporaryMemoryState *state;
SDL_TemporaryMemory *entry, *next;
if (!event->memory) {
return;
}
state = SDL_GetTemporaryMemoryState(true);
if (!state) {
return; // this is now a leak, but you probably have bigger problems if malloc failed.
}
for (entry = event->memory; entry; entry = next) {
next = entry->next;
SDL_LinkTemporaryMemoryEntry(state, entry);
}
event->memory = NULL;
}
static void *SDL_FreeLater(void *memory)
{
SDL_TemporaryMemoryState *state;
if (memory == NULL) {
return NULL;
}
// Make sure we're not adding this to the list twice
//SDL_assert(!SDL_ClaimTemporaryMemory(memory));
state = SDL_GetTemporaryMemoryState(true);
if (!state) {
return memory; // this is now a leak, but you probably have bigger problems if malloc failed.
}
SDL_TemporaryMemory *entry = (SDL_TemporaryMemory *)SDL_malloc(sizeof(*entry));
if (!entry) {
return memory; // this is now a leak, but you probably have bigger problems if malloc failed. We could probably pool up and reuse entries, though.
}
entry->memory = memory;
SDL_LinkTemporaryMemoryEntry(state, entry);
return memory;
}
void *SDL_AllocateTemporaryMemory(size_t size)
{
return SDL_FreeLater(SDL_malloc(size));
}
const char *SDL_CreateTemporaryString(const char *string)
{
if (string) {
return (const char *)SDL_FreeLater(SDL_strdup(string));
}
return NULL;
}
void *SDL_ClaimTemporaryMemory(const void *mem)
{
SDL_TemporaryMemoryState *state;
state = SDL_GetTemporaryMemoryState(false);
if (state && mem) {
SDL_TemporaryMemory *entry = SDL_GetTemporaryMemoryEntry(state, mem);
if (entry) {
SDL_UnlinkTemporaryMemoryEntry(state, entry);
SDL_FreeTemporaryMemoryEntry(state, entry, false);
return (void *)mem;
}
}
return NULL;
}
void SDL_FreeTemporaryMemory(void)
{
SDL_TemporaryMemoryState *state;
state = SDL_GetTemporaryMemoryState(false);
if (!state) {
return;
}
while (state->head) {
SDL_TemporaryMemory *entry = state->head;
SDL_UnlinkTemporaryMemoryEntry(state, entry);
SDL_FreeTemporaryMemoryEntry(state, entry, true);
}
}
#ifndef SDL_JOYSTICK_DISABLED
static bool SDL_update_joysticks = true;
static void SDLCALL SDL_AutoUpdateJoysticksChanged(void *userdata, const char *name, const char *oldValue, const char *hint)
{
SDL_update_joysticks = SDL_GetStringBoolean(hint, true);
}
#endif // !SDL_JOYSTICK_DISABLED
#ifndef SDL_SENSOR_DISABLED
static bool SDL_update_sensors = true;
static void SDLCALL SDL_AutoUpdateSensorsChanged(void *userdata, const char *name, const char *oldValue, const char *hint)
{
SDL_update_sensors = SDL_GetStringBoolean(hint, true);
}
#endif // !SDL_SENSOR_DISABLED
static void SDLCALL SDL_PollSentinelChanged(void *userdata, const char *name, const char *oldValue, const char *hint)
{
SDL_SetEventEnabled(SDL_EVENT_POLL_SENTINEL, SDL_GetStringBoolean(hint, true));
}
/**
* Verbosity of logged events as defined in SDL_HINT_EVENT_LOGGING:
* - 0: (default) no logging
* - 1: logging of most events
* - 2: as above, plus mouse, pen, and finger motion
*/
static int SDL_EventLoggingVerbosity = 0;
static void SDLCALL SDL_EventLoggingChanged(void *userdata, const char *name, const char *oldValue, const char *hint)
{
SDL_EventLoggingVerbosity = (hint && *hint) ? SDL_clamp(SDL_atoi(hint), 0, 3) : 0;
}
static void SDL_LogEvent(const SDL_Event *event)
{
static const char *pen_axisnames[] = { "PRESSURE", "XTILT", "YTILT", "DISTANCE", "ROTATION", "SLIDER", "TANGENTIAL_PRESSURE" };
SDL_COMPILE_TIME_ASSERT(pen_axisnames_array_matches, SDL_arraysize(pen_axisnames) == SDL_PEN_AXIS_COUNT);
char name[64];
char details[128];
// sensor/mouse/pen/finger motion are spammy, ignore these if they aren't demanded.
if ((SDL_EventLoggingVerbosity < 2) &&
((event->type == SDL_EVENT_MOUSE_MOTION) ||
(event->type == SDL_EVENT_FINGER_MOTION) ||
(event->type == SDL_EVENT_PEN_AXIS) ||
(event->type == SDL_EVENT_PEN_MOTION) ||
(event->type == SDL_EVENT_GAMEPAD_TOUCHPAD_MOTION) ||
(event->type == SDL_EVENT_GAMEPAD_SENSOR_UPDATE) ||
(event->type == SDL_EVENT_SENSOR_UPDATE))) {
return;
}
// this is to make (void)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_EVENT_USER) && (event->type <= SDL_EVENT_LAST)) {
char plusstr[16];
SDL_strlcpy(name, "SDL_EVENT_USER", sizeof(name));
if (event->type > SDL_EVENT_USER) {
(void)SDL_snprintf(plusstr, sizeof(plusstr), "+%u", ((uint)event->type) - SDL_EVENT_USER);
} else {
plusstr[0] = '\0';
}
(void)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_EVENT_FIRST)
SDL_strlcpy(details, " (THIS IS PROBABLY A BUG!)", sizeof(details));
break;
SDL_EVENT_CASE(SDL_EVENT_QUIT)
(void)SDL_snprintf(details, sizeof(details), " (timestamp=%u)", (uint)event->quit.timestamp);
break;
SDL_EVENT_CASE(SDL_EVENT_TERMINATING)
break;
SDL_EVENT_CASE(SDL_EVENT_LOW_MEMORY)
break;
SDL_EVENT_CASE(SDL_EVENT_WILL_ENTER_BACKGROUND)
break;
SDL_EVENT_CASE(SDL_EVENT_DID_ENTER_BACKGROUND)
break;
SDL_EVENT_CASE(SDL_EVENT_WILL_ENTER_FOREGROUND)
break;
SDL_EVENT_CASE(SDL_EVENT_DID_ENTER_FOREGROUND)
break;
SDL_EVENT_CASE(SDL_EVENT_LOCALE_CHANGED)
break;
SDL_EVENT_CASE(SDL_EVENT_SYSTEM_THEME_CHANGED)
break;
SDL_EVENT_CASE(SDL_EVENT_KEYMAP_CHANGED)
break;
SDL_EVENT_CASE(SDL_EVENT_CLIPBOARD_UPDATE)
break;
#define SDL_RENDEREVENT_CASE(x) \
case x: \
SDL_strlcpy(name, #x, sizeof(name)); \
(void)SDL_snprintf(details, sizeof(details), " (timestamp=%u event=%s windowid=%u)", \
(uint)event->display.timestamp, name, (uint)event->render.windowID); \
break
SDL_RENDEREVENT_CASE(SDL_EVENT_RENDER_TARGETS_RESET);
SDL_RENDEREVENT_CASE(SDL_EVENT_RENDER_DEVICE_RESET);
SDL_RENDEREVENT_CASE(SDL_EVENT_RENDER_DEVICE_LOST);
#define SDL_DISPLAYEVENT_CASE(x) \
case x: \
SDL_strlcpy(name, #x, sizeof(name)); \
(void)SDL_snprintf(details, sizeof(details), " (timestamp=%u display=%u event=%s data1=%d, data2=%d)", \
(uint)event->display.timestamp, (uint)event->display.displayID, name, (int)event->display.data1, (int)event->display.data2); \
break
SDL_DISPLAYEVENT_CASE(SDL_EVENT_DISPLAY_ORIENTATION);
SDL_DISPLAYEVENT_CASE(SDL_EVENT_DISPLAY_ADDED);
SDL_DISPLAYEVENT_CASE(SDL_EVENT_DISPLAY_REMOVED);
SDL_DISPLAYEVENT_CASE(SDL_EVENT_DISPLAY_MOVED);
SDL_DISPLAYEVENT_CASE(SDL_EVENT_DISPLAY_DESKTOP_MODE_CHANGED);
SDL_DISPLAYEVENT_CASE(SDL_EVENT_DISPLAY_CURRENT_MODE_CHANGED);
SDL_DISPLAYEVENT_CASE(SDL_EVENT_DISPLAY_CONTENT_SCALE_CHANGED);
#undef SDL_DISPLAYEVENT_CASE
#define SDL_WINDOWEVENT_CASE(x) \
case x: \
SDL_strlcpy(name, #x, sizeof(name)); \
(void)SDL_snprintf(details, sizeof(details), " (timestamp=%u windowid=%u event=%s data1=%d data2=%d)", \
(uint)event->window.timestamp, (uint)event->window.windowID, name, (int)event->window.data1, (int)event->window.data2); \
break
SDL_WINDOWEVENT_CASE(SDL_EVENT_WINDOW_SHOWN);
SDL_WINDOWEVENT_CASE(SDL_EVENT_WINDOW_HIDDEN);
SDL_WINDOWEVENT_CASE(SDL_EVENT_WINDOW_EXPOSED);
SDL_WINDOWEVENT_CASE(SDL_EVENT_WINDOW_MOVED);
SDL_WINDOWEVENT_CASE(SDL_EVENT_WINDOW_RESIZED);
SDL_WINDOWEVENT_CASE(SDL_EVENT_WINDOW_PIXEL_SIZE_CHANGED);
SDL_WINDOWEVENT_CASE(SDL_EVENT_WINDOW_METAL_VIEW_RESIZED);
SDL_WINDOWEVENT_CASE(SDL_EVENT_WINDOW_SAFE_AREA_CHANGED);
SDL_WINDOWEVENT_CASE(SDL_EVENT_WINDOW_MINIMIZED);
SDL_WINDOWEVENT_CASE(SDL_EVENT_WINDOW_MAXIMIZED);
SDL_WINDOWEVENT_CASE(SDL_EVENT_WINDOW_RESTORED);
SDL_WINDOWEVENT_CASE(SDL_EVENT_WINDOW_MOUSE_ENTER);
SDL_WINDOWEVENT_CASE(SDL_EVENT_WINDOW_MOUSE_LEAVE);
SDL_WINDOWEVENT_CASE(SDL_EVENT_WINDOW_FOCUS_GAINED);
SDL_WINDOWEVENT_CASE(SDL_EVENT_WINDOW_FOCUS_LOST);
SDL_WINDOWEVENT_CASE(SDL_EVENT_WINDOW_CLOSE_REQUESTED);
SDL_WINDOWEVENT_CASE(SDL_EVENT_WINDOW_HIT_TEST);
SDL_WINDOWEVENT_CASE(SDL_EVENT_WINDOW_ICCPROF_CHANGED);
SDL_WINDOWEVENT_CASE(SDL_EVENT_WINDOW_DISPLAY_CHANGED);
SDL_WINDOWEVENT_CASE(SDL_EVENT_WINDOW_DISPLAY_SCALE_CHANGED);
SDL_WINDOWEVENT_CASE(SDL_EVENT_WINDOW_OCCLUDED);
SDL_WINDOWEVENT_CASE(SDL_EVENT_WINDOW_ENTER_FULLSCREEN);
SDL_WINDOWEVENT_CASE(SDL_EVENT_WINDOW_LEAVE_FULLSCREEN);
SDL_WINDOWEVENT_CASE(SDL_EVENT_WINDOW_DESTROYED);
SDL_WINDOWEVENT_CASE(SDL_EVENT_WINDOW_HDR_STATE_CHANGED);
#undef SDL_WINDOWEVENT_CASE
#define PRINT_KEYDEV_EVENT(event) (void)SDL_snprintf(details, sizeof(details), " (timestamp=%u which=%u)", (uint)event->kdevice.timestamp, (uint)event->kdevice.which)
SDL_EVENT_CASE(SDL_EVENT_KEYBOARD_ADDED)
PRINT_KEYDEV_EVENT(event);
break;
SDL_EVENT_CASE(SDL_EVENT_KEYBOARD_REMOVED)
PRINT_KEYDEV_EVENT(event);
break;
#undef PRINT_KEYDEV_EVENT
#define PRINT_KEY_EVENT(event) \
(void)SDL_snprintf(details, sizeof(details), " (timestamp=%u windowid=%u which=%u state=%s repeat=%s scancode=%u keycode=%u mod=0x%x)", \
(uint)event->key.timestamp, (uint)event->key.windowID, (uint)event->key.which, \
event->key.down ? "pressed" : "released", \
event->key.repeat ? "true" : "false", \
(uint)event->key.scancode, \
(uint)event->key.key, \
(uint)event->key.mod)
SDL_EVENT_CASE(SDL_EVENT_KEY_DOWN)
PRINT_KEY_EVENT(event);
break;
SDL_EVENT_CASE(SDL_EVENT_KEY_UP)
PRINT_KEY_EVENT(event);
break;
#undef PRINT_KEY_EVENT
SDL_EVENT_CASE(SDL_EVENT_TEXT_EDITING)
(void)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_EVENT_TEXT_EDITING_CANDIDATES)
(void)SDL_snprintf(details, sizeof(details), " (timestamp=%u windowid=%u num_candidates=%d selected_candidate=%d)",
(uint)event->edit_candidates.timestamp, (uint)event->edit_candidates.windowID,
(int)event->edit_candidates.num_candidates, (int)event->edit_candidates.selected_candidate);
break;
SDL_EVENT_CASE(SDL_EVENT_TEXT_INPUT)
(void)SDL_snprintf(details, sizeof(details), " (timestamp=%u windowid=%u text='%s')", (uint)event->text.timestamp, (uint)event->text.windowID, event->text.text);
break;
#define PRINT_MOUSEDEV_EVENT(event) (void)SDL_snprintf(details, sizeof(details), " (timestamp=%u which=%u)", (uint)event->mdevice.timestamp, (uint)event->mdevice.which)
SDL_EVENT_CASE(SDL_EVENT_MOUSE_ADDED)
PRINT_MOUSEDEV_EVENT(event);
break;
SDL_EVENT_CASE(SDL_EVENT_MOUSE_REMOVED)
PRINT_MOUSEDEV_EVENT(event);
break;
#undef PRINT_MOUSEDEV_EVENT
SDL_EVENT_CASE(SDL_EVENT_MOUSE_MOTION)
(void)SDL_snprintf(details, sizeof(details), " (timestamp=%u windowid=%u which=%u state=%u x=%g y=%g xrel=%g yrel=%g)",
(uint)event->motion.timestamp, (uint)event->motion.windowID,
(uint)event->motion.which, (uint)event->motion.state,
event->motion.x, event->motion.y,
event->motion.xrel, event->motion.yrel);
break;
#define PRINT_MBUTTON_EVENT(event) \
(void)SDL_snprintf(details, sizeof(details), " (timestamp=%u windowid=%u which=%u button=%u state=%s clicks=%u x=%g y=%g)", \
(uint)event->button.timestamp, (uint)event->button.windowID, \
(uint)event->button.which, (uint)event->button.button, \
event->button.down ? "pressed" : "released", \
(uint)event->button.clicks, event->button.x, event->button.y)
SDL_EVENT_CASE(SDL_EVENT_MOUSE_BUTTON_DOWN)
PRINT_MBUTTON_EVENT(event);
break;
SDL_EVENT_CASE(SDL_EVENT_MOUSE_BUTTON_UP)
PRINT_MBUTTON_EVENT(event);
break;
#undef PRINT_MBUTTON_EVENT
SDL_EVENT_CASE(SDL_EVENT_MOUSE_WHEEL)
(void)SDL_snprintf(details, sizeof(details), " (timestamp=%u windowid=%u which=%u x=%g y=%g direction=%s)",
(uint)event->wheel.timestamp, (uint)event->wheel.windowID,
(uint)event->wheel.which, event->wheel.x, event->wheel.y,
event->wheel.direction == SDL_MOUSEWHEEL_NORMAL ? "normal" : "flipped");
break;
SDL_EVENT_CASE(SDL_EVENT_JOYSTICK_AXIS_MOTION)
(void)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_EVENT_JOYSTICK_BALL_MOTION)
(void)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_EVENT_JOYSTICK_HAT_MOTION)
(void)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) \
(void)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.down ? "pressed" : "released")
SDL_EVENT_CASE(SDL_EVENT_JOYSTICK_BUTTON_DOWN)
PRINT_JBUTTON_EVENT(event);
break;
SDL_EVENT_CASE(SDL_EVENT_JOYSTICK_BUTTON_UP)
PRINT_JBUTTON_EVENT(event);
break;
#undef PRINT_JBUTTON_EVENT
SDL_EVENT_CASE(SDL_EVENT_JOYSTICK_BATTERY_UPDATED)
(void)SDL_snprintf(details, sizeof(details), " (timestamp=%u which=%d state=%u percent=%d)",
(uint)event->jbattery.timestamp, (int)event->jbattery.which,
event->jbattery.state, event->jbattery.percent);
break;
#define PRINT_JOYDEV_EVENT(event) (void)SDL_snprintf(details, sizeof(details), " (timestamp=%u which=%d)", (uint)event->jdevice.timestamp, (int)event->jdevice.which)
SDL_EVENT_CASE(SDL_EVENT_JOYSTICK_ADDED)
PRINT_JOYDEV_EVENT(event);
break;
SDL_EVENT_CASE(SDL_EVENT_JOYSTICK_REMOVED)
PRINT_JOYDEV_EVENT(event);
break;
SDL_EVENT_CASE(SDL_EVENT_JOYSTICK_UPDATE_COMPLETE)
PRINT_JOYDEV_EVENT(event);
break;
#undef PRINT_JOYDEV_EVENT
SDL_EVENT_CASE(SDL_EVENT_GAMEPAD_AXIS_MOTION)
(void)SDL_snprintf(details, sizeof(details), " (timestamp=%u which=%d axis=%u value=%d)",
(uint)event->gaxis.timestamp, (int)event->gaxis.which,
(uint)event->gaxis.axis, (int)event->gaxis.value);
break;
#define PRINT_CBUTTON_EVENT(event) \
(void)SDL_snprintf(details, sizeof(details), " (timestamp=%u which=%d button=%u state=%s)", \
(uint)event->gbutton.timestamp, (int)event->gbutton.which, \
(uint)event->gbutton.button, event->gbutton.down ? "pressed" : "released")
SDL_EVENT_CASE(SDL_EVENT_GAMEPAD_BUTTON_DOWN)
PRINT_CBUTTON_EVENT(event);
break;
SDL_EVENT_CASE(SDL_EVENT_GAMEPAD_BUTTON_UP)
PRINT_CBUTTON_EVENT(event);
break;
#undef PRINT_CBUTTON_EVENT
#define PRINT_GAMEPADDEV_EVENT(event) (void)SDL_snprintf(details, sizeof(details), " (timestamp=%u which=%d)", (uint)event->gdevice.timestamp, (int)event->gdevice.which)
SDL_EVENT_CASE(SDL_EVENT_GAMEPAD_ADDED)
PRINT_GAMEPADDEV_EVENT(event);
break;
SDL_EVENT_CASE(SDL_EVENT_GAMEPAD_REMOVED)
PRINT_GAMEPADDEV_EVENT(event);
break;
SDL_EVENT_CASE(SDL_EVENT_GAMEPAD_REMAPPED)
PRINT_GAMEPADDEV_EVENT(event);
break;
SDL_EVENT_CASE(SDL_EVENT_GAMEPAD_UPDATE_COMPLETE)
PRINT_GAMEPADDEV_EVENT(event);
break;
SDL_EVENT_CASE(SDL_EVENT_GAMEPAD_STEAM_HANDLE_UPDATED)
PRINT_GAMEPADDEV_EVENT(event);
break;
#undef PRINT_GAMEPADDEV_EVENT
#define PRINT_CTOUCHPAD_EVENT(event) \
(void)SDL_snprintf(details, sizeof(details), " (timestamp=%u which=%d touchpad=%d finger=%d x=%f y=%f pressure=%f)", \
(uint)event->gtouchpad.timestamp, (int)event->gtouchpad.which, \
(int)event->gtouchpad.touchpad, (int)event->gtouchpad.finger, \
event->gtouchpad.x, event->gtouchpad.y, event->gtouchpad.pressure)
SDL_EVENT_CASE(SDL_EVENT_GAMEPAD_TOUCHPAD_DOWN)
PRINT_CTOUCHPAD_EVENT(event);
break;
SDL_EVENT_CASE(SDL_EVENT_GAMEPAD_TOUCHPAD_UP)
PRINT_CTOUCHPAD_EVENT(event);
break;
SDL_EVENT_CASE(SDL_EVENT_GAMEPAD_TOUCHPAD_MOTION)
PRINT_CTOUCHPAD_EVENT(event);
break;
#undef PRINT_CTOUCHPAD_EVENT
SDL_EVENT_CASE(SDL_EVENT_GAMEPAD_SENSOR_UPDATE)
(void)SDL_snprintf(details, sizeof(details), " (timestamp=%u which=%d sensor=%d data[0]=%f data[1]=%f data[2]=%f)",
(uint)event->gsensor.timestamp, (int)event->gsensor.which, (int)event->gsensor.sensor,
event->gsensor.data[0], event->gsensor.data[1], event->gsensor.data[2]);
break;
#define PRINT_FINGER_EVENT(event) \
(void)SDL_snprintf(details, sizeof(details), " (timestamp=%u touchid=%" SDL_PRIu64 " fingerid=%" SDL_PRIu64 " x=%f y=%f dx=%f dy=%f pressure=%f)", \
(uint)event->tfinger.timestamp, event->tfinger.touchID, \
event->tfinger.fingerID, event->tfinger.x, event->tfinger.y, \
event->tfinger.dx, event->tfinger.dy, event->tfinger.pressure)
SDL_EVENT_CASE(SDL_EVENT_FINGER_DOWN)
PRINT_FINGER_EVENT(event);
break;
SDL_EVENT_CASE(SDL_EVENT_FINGER_UP)
PRINT_FINGER_EVENT(event);
break;
SDL_EVENT_CASE(SDL_EVENT_FINGER_CANCELED)
PRINT_FINGER_EVENT(event);
break;
SDL_EVENT_CASE(SDL_EVENT_FINGER_MOTION)
PRINT_FINGER_EVENT(event);
break;
#undef PRINT_FINGER_EVENT
#define PRINT_PTOUCH_EVENT(event) \
(void)SDL_snprintf(details, sizeof(details), " (timestamp=%u windowid=%u which=%u pen_state=%u x=%g y=%g eraser=%s state=%s)", \
(uint)event->ptouch.timestamp, (uint)event->ptouch.windowID, (uint)event->ptouch.which, (uint)event->ptouch.pen_state, event->ptouch.x, event->ptouch.y, \
event->ptouch.eraser ? "yes" : "no", event->ptouch.down ? "down" : "up");
SDL_EVENT_CASE(SDL_EVENT_PEN_DOWN)
PRINT_PTOUCH_EVENT(event);
break;
SDL_EVENT_CASE(SDL_EVENT_PEN_UP)
PRINT_PTOUCH_EVENT(event);
break;
#undef PRINT_PTOUCH_EVENT
#define PRINT_PPROXIMITY_EVENT(event) \
(void)SDL_snprintf(details, sizeof(details), " (timestamp=%u windowid=%u which=%u)", \
(uint)event->pproximity.timestamp, (uint)event->pproximity.windowID, (uint)event->pproximity.which);
SDL_EVENT_CASE(SDL_EVENT_PEN_PROXIMITY_IN)
PRINT_PPROXIMITY_EVENT(event);
break;
SDL_EVENT_CASE(SDL_EVENT_PEN_PROXIMITY_OUT)
PRINT_PPROXIMITY_EVENT(event);
break;
#undef PRINT_PPROXIMITY_EVENT
SDL_EVENT_CASE(SDL_EVENT_PEN_AXIS)
(void)SDL_snprintf(details, sizeof(details), " (timestamp=%u windowid=%u which=%u pen_state=%u x=%g y=%g axis=%s value=%g)",
(uint)event->paxis.timestamp, (uint)event->paxis.windowID, (uint)event->paxis.which, (uint)event->paxis.pen_state, event->paxis.x, event->paxis.y,
((((int) event->paxis.axis) >= 0) && (event->paxis.axis < SDL_arraysize(pen_axisnames))) ? pen_axisnames[event->paxis.axis] : "[UNKNOWN]", event->paxis.value);
break;
SDL_EVENT_CASE(SDL_EVENT_PEN_MOTION)
(void)SDL_snprintf(details, sizeof(details), " (timestamp=%u windowid=%u which=%u pen_state=%u x=%g y=%g)",
(uint)event->pmotion.timestamp, (uint)event->pmotion.windowID, (uint)event->pmotion.which, (uint)event->pmotion.pen_state, event->pmotion.x, event->pmotion.y);
break;
#define PRINT_PBUTTON_EVENT(event) \
(void)SDL_snprintf(details, sizeof(details), " (timestamp=%u windowid=%u which=%u pen_state=%u x=%g y=%g button=%u state=%s)", \
(uint)event->pbutton.timestamp, (uint)event->pbutton.windowID, (uint)event->pbutton.which, (uint)event->pbutton.pen_state, event->pbutton.x, event->pbutton.y, \
(uint)event->pbutton.button, event->pbutton.down ? "down" : "up");
SDL_EVENT_CASE(SDL_EVENT_PEN_BUTTON_DOWN)
PRINT_PBUTTON_EVENT(event);
break;
SDL_EVENT_CASE(SDL_EVENT_PEN_BUTTON_UP)
PRINT_PBUTTON_EVENT(event);
break;
#undef PRINT_PBUTTON_EVENT
#define PRINT_DROP_EVENT(event) (void)SDL_snprintf(details, sizeof(details), " (data='%s' timestamp=%u windowid=%u x=%f y=%f)", event->drop.data, (uint)event->drop.timestamp, (uint)event->drop.windowID, event->drop.x, event->drop.y)
SDL_EVENT_CASE(SDL_EVENT_DROP_FILE)
PRINT_DROP_EVENT(event);
break;
SDL_EVENT_CASE(SDL_EVENT_DROP_TEXT)
PRINT_DROP_EVENT(event);
break;
SDL_EVENT_CASE(SDL_EVENT_DROP_BEGIN)
PRINT_DROP_EVENT(event);
break;
SDL_EVENT_CASE(SDL_EVENT_DROP_COMPLETE)
PRINT_DROP_EVENT(event);
break;
SDL_EVENT_CASE(SDL_EVENT_DROP_POSITION)
PRINT_DROP_EVENT(event);
break;
#undef PRINT_DROP_EVENT
#define PRINT_AUDIODEV_EVENT(event) (void)SDL_snprintf(details, sizeof(details), " (timestamp=%u which=%u recording=%s)", (uint)event->adevice.timestamp, (uint)event->adevice.which, event->adevice.recording ? "true" : "false")
SDL_EVENT_CASE(SDL_EVENT_AUDIO_DEVICE_ADDED)
PRINT_AUDIODEV_EVENT(event);
break;
SDL_EVENT_CASE(SDL_EVENT_AUDIO_DEVICE_REMOVED)
PRINT_AUDIODEV_EVENT(event);
break;
SDL_EVENT_CASE(SDL_EVENT_AUDIO_DEVICE_FORMAT_CHANGED)
PRINT_AUDIODEV_EVENT(event);
break;
#undef PRINT_AUDIODEV_EVENT
#define PRINT_CAMERADEV_EVENT(event) (void)SDL_snprintf(details, sizeof(details), " (timestamp=%u which=%u)", (uint)event->cdevice.timestamp, (uint)event->cdevice.which)
SDL_EVENT_CASE(SDL_EVENT_CAMERA_DEVICE_ADDED)
PRINT_CAMERADEV_EVENT(event);
break;
SDL_EVENT_CASE(SDL_EVENT_CAMERA_DEVICE_REMOVED)
PRINT_CAMERADEV_EVENT(event);
break;
SDL_EVENT_CASE(SDL_EVENT_CAMERA_DEVICE_APPROVED)
PRINT_CAMERADEV_EVENT(event);
break;
SDL_EVENT_CASE(SDL_EVENT_CAMERA_DEVICE_DENIED)
PRINT_CAMERADEV_EVENT(event);
break;
#undef PRINT_CAMERADEV_EVENT
SDL_EVENT_CASE(SDL_EVENT_SENSOR_UPDATE)
(void)SDL_snprintf(details, sizeof(details), " (timestamp=%u which=%d data[0]=%f data[1]=%f data[2]=%f data[3]=%f data[4]=%f data[5]=%f)",
(uint)event->sensor.timestamp, (int)event->sensor.which,
event->sensor.data[0], event->sensor.data[1], event->sensor.data[2],
event->sensor.data[3], event->sensor.data[4], event->sensor.data[5]);
break;
#undef SDL_EVENT_CASE
case SDL_EVENT_POLL_SENTINEL:
// No logging necessary for this one
break;
default:
if (!name[0]) {
if (event->type >= SDL_EVENT_USER) {
SDL_strlcpy(name, "USER", sizeof(name));
} else {
SDL_strlcpy(name, "UNKNOWN", sizeof(name));
}
(void)SDL_snprintf(details, sizeof(details), " 0x%x", (uint)event->type);
}
break;
}
if (name[0]) {
SDL_Log("SDL EVENT: %s%s", name, details);
}
#undef uint
}
void SDL_StopEventLoop(void)
{
const char *report = SDL_GetHint("SDL_EVENT_QUEUE_STATISTICS");
int i;
SDL_EventEntry *entry;
SDL_LockMutex(SDL_EventQ.lock);
SDL_EventQ.active = false;
if (report && SDL_atoi(report)) {
SDL_Log("SDL EVENT QUEUE: Maximum events in-flight: %d",
SDL_EventQ.max_events_seen);
}
// Clean out EventQ
for (entry = SDL_EventQ.head; entry;) {
SDL_EventEntry *next = entry->next;
SDL_TransferTemporaryMemoryFromEvent(entry);
SDL_free(entry);
entry = next;
}
for (entry = SDL_EventQ.free; entry;) {
SDL_EventEntry *next = entry->next;
SDL_free(entry);
entry = next;
}
SDL_SetAtomicInt(&SDL_EventQ.count, 0);
SDL_EventQ.max_events_seen = 0;
SDL_EventQ.head = NULL;
SDL_EventQ.tail = NULL;
SDL_EventQ.free = NULL;
SDL_SetAtomicInt(&SDL_sentinel_pending, 0);
// 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);
SDL_Mutex *lock = NULL;
if (SDL_EventQ.lock) {
lock = SDL_EventQ.lock;
SDL_EventQ.lock = NULL;
}
SDL_UnlockMutex(lock);
if (lock) {
SDL_DestroyMutex(lock);
}
}
// This function (and associated calls) may be called more than once
bool SDL_StartEventLoop(void)
{
/* We'll leave the event queue alone, since we might have gotten
some important events at launch (like SDL_EVENT_DROP_FILE)
FIXME: Does this introduce any other bugs with events at startup?
*/
// Create the lock and set ourselves active
#ifndef SDL_THREADS_DISABLED
if (!SDL_EventQ.lock) {
SDL_EventQ.lock = SDL_CreateMutex();
if (SDL_EventQ.lock == NULL) {
return false;
}
}
SDL_LockMutex(SDL_EventQ.lock);
if (SDL_event_watchers_lock == NULL) {
SDL_event_watchers_lock = SDL_CreateMutex();
if (SDL_event_watchers_lock == NULL) {
SDL_UnlockMutex(SDL_EventQ.lock);
return false;
}
}
#endif // !SDL_THREADS_DISABLED
SDL_EventQ.active = true;
SDL_UnlockMutex(SDL_EventQ.lock);
return true;
}
// 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_GetAtomicInt(&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 == NULL) {
return 0;
}
} else {
entry = SDL_EventQ.free;
SDL_EventQ.free = entry->next;
}
if (SDL_EventLoggingVerbosity > 0) {
SDL_LogEvent(event);
}
SDL_copyp(&entry->event, event);
if (event->type == SDL_EVENT_POLL_SENTINEL) {
SDL_AddAtomicInt(&SDL_sentinel_pending, 1);
}
entry->memory = NULL;
SDL_TransferTemporaryMemoryToEvent(entry);
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_AddAtomicInt(&SDL_EventQ.count, 1) + 1;
if (final_count > SDL_EventQ.max_events_seen) {
SDL_EventQ.max_events_seen = final_count;
}
++SDL_last_event_id;
return 1;
}
// Remove an event from the queue -- called with the queue locked
static void SDL_CutEvent(SDL_EventEntry *entry)
{
SDL_TransferTemporaryMemoryFromEvent(entry);
if (entry->prev) {
entry->prev->next = entry->next;
}