SDL  2.0
SDL_timer_c.h File Reference
#include "../SDL_internal.h"
#include "SDL_timer.h"
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Macros

#define ROUND_RESOLUTION(X)    (((X+TIMER_RESOLUTION-1)/TIMER_RESOLUTION)*TIMER_RESOLUTION)
 

Functions

void SDL_TicksInit (void)
 
void SDL_TicksQuit (void)
 
int SDL_TimerInit (void)
 
void SDL_TimerQuit (void)
 

Macro Definition Documentation

◆ ROUND_RESOLUTION

#define ROUND_RESOLUTION (   X)     (((X+TIMER_RESOLUTION-1)/TIMER_RESOLUTION)*TIMER_RESOLUTION)

Definition at line 30 of file SDL_timer_c.h.

Function Documentation

◆ SDL_TicksInit()

void SDL_TicksInit ( void  )

Referenced by SDL_InitSubSystem(), and SDL_VideoInit().

◆ SDL_TicksQuit()

void SDL_TicksQuit ( void  )

Referenced by SDL_Quit().

◆ SDL_TimerInit()

int SDL_TimerInit ( void  )

Definition at line 207 of file SDL_timer.c.

208 {
210 
211  if (!SDL_AtomicGet(&data->active)) {
212  const char *name = "SDLTimer";
214  if (!data->timermap_lock) {
215  return -1;
216  }
217 
218  data->sem = SDL_CreateSemaphore(0);
219  if (!data->sem) {
220  SDL_DestroyMutex(data->timermap_lock);
221  return -1;
222  }
223 
224  SDL_AtomicSet(&data->active, 1);
225 
226  /* Timer threads use a callback into the app, so we can't set a limited stack size here. */
228  if (!data->thread) {
229  SDL_TimerQuit();
230  return -1;
231  }
232 
233  SDL_AtomicSet(&data->nextID, 1);
234  }
235  return 0;
236 }

References SDL_AtomicGet, SDL_AtomicSet, SDL_CreateMutex, SDL_CreateSemaphore, SDL_CreateThreadInternal(), SDL_DestroyMutex, SDL_timer_data, SDL_TimerQuit(), SDL_TimerThread(), and SDL_TimerData::timermap_lock.

Referenced by SDL_AddTimer(), and SDL_InitSubSystem().

◆ SDL_TimerQuit()

void SDL_TimerQuit ( void  )

Definition at line 239 of file SDL_timer.c.

240 {
242  SDL_Timer *timer;
243  SDL_TimerMap *entry;
244 
245  if (SDL_AtomicCAS(&data->active, 1, 0)) { /* active? Move to inactive. */
246  /* Shutdown the timer thread */
247  if (data->thread) {
248  SDL_SemPost(data->sem);
249  SDL_WaitThread(data->thread, NULL);
250  data->thread = NULL;
251  }
252 
254  data->sem = NULL;
255 
256  /* Clean up the timer entries */
257  while (data->timers) {
258  timer = data->timers;
259  data->timers = timer->next;
260  SDL_free(timer);
261  }
262  while (data->freelist) {
263  timer = data->freelist;
264  data->freelist = timer->next;
265  SDL_free(timer);
266  }
267  while (data->timermap) {
268  entry = data->timermap;
269  data->timermap = entry->next;
270  SDL_free(entry);
271  }
272 
273  SDL_DestroyMutex(data->timermap_lock);
274  data->timermap_lock = NULL;
275  }
276 }

References SDL_Timer::next, SDL_TimerMap::next, NULL, SDL_AtomicCAS, SDL_DestroyMutex, SDL_DestroySemaphore, SDL_free, SDL_SemPost, SDL_timer_data, and SDL_WaitThread.

Referenced by SDL_QuitSubSystem(), and SDL_TimerInit().

SDL_TimerQuit
void SDL_TimerQuit(void)
Definition: SDL_timer.c:239
SDL_CreateSemaphore
#define SDL_CreateSemaphore
Definition: SDL_dynapi_overrides.h:264
SDL_AtomicCAS
#define SDL_AtomicCAS
Definition: SDL_dynapi_overrides.h:66
NULL
#define NULL
Definition: begin_code.h:164
SDL_TimerMap
Definition: SDL_timer.c:43
SDL_CreateMutex
#define SDL_CreateMutex
Definition: SDL_dynapi_overrides.h:259
SDL_Timer::next
struct _SDL_Timer * next
Definition: SDL_timer.c:39
SDL_Timer
Definition: SDL_timer.c:32
SDL_SemPost
#define SDL_SemPost
Definition: SDL_dynapi_overrides.h:269
data
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1974
SDL_TimerMap::next
struct _SDL_TimerMap * next
Definition: SDL_timer.c:46
SDL_CreateThreadInternal
SDL_Thread * SDL_CreateThreadInternal(int(*fn)(void *), const char *name, const size_t stacksize, void *data)
Definition: SDL_thread.c:429
SDL_free
#define SDL_free
Definition: SDL_dynapi_overrides.h:377
name
GLuint const GLchar * name
Definition: SDL_opengl_glext.h:660
SDL_TimerData
Definition: SDL_timer.c:50
SDL_TimerData::timermap_lock
SDL_mutex * timermap_lock
Definition: SDL_timer.c:55
SDL_DestroyMutex
#define SDL_DestroyMutex
Definition: SDL_dynapi_overrides.h:263
SDL_timer_data
static SDL_TimerData SDL_timer_data
Definition: SDL_timer.c:71
SDL_DestroySemaphore
#define SDL_DestroySemaphore
Definition: SDL_dynapi_overrides.h:265
SDL_AtomicSet
#define SDL_AtomicSet
Definition: SDL_dynapi_overrides.h:67
SDL_AtomicGet
#define SDL_AtomicGet
Definition: SDL_dynapi_overrides.h:68
SDL_WaitThread
#define SDL_WaitThread
Definition: SDL_dynapi_overrides.h:478
SDL_TimerThread
static int SDL_TimerThread(void *_data)
Definition: SDL_timer.c:101