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      1 /*
      2     SDL - Simple DirectMedia Layer
      3     Copyright (C) 1997-2012 Sam Lantinga
      4 
      5     This library is free software; you can redistribute it and/or
      6     modify it under the terms of the GNU Lesser General Public
      7     License as published by the Free Software Foundation; either
      8     version 2.1 of the License, or (at your option) any later version.
      9 
     10     This library is distributed in the hope that it will be useful,
     11     but WITHOUT ANY WARRANTY; without even the implied warranty of
     12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     13     Lesser General Public License for more details.
     14 
     15     You should have received a copy of the GNU Lesser General Public
     16     License along with this library; if not, write to the Free Software
     17     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
     18 
     19     Sam Lantinga
     20     slouken (at) libsdl.org
     21 */
     22 #include "SDL_config.h"
     23 
     24 #if defined(SDL_TIMER_DUMMY) || defined(SDL_TIMERS_DISABLED)
     25 
     26 #include "SDL_timer.h"
     27 #include "../SDL_timer_c.h"
     28 
     29 void SDL_StartTicks(void)
     30 {
     31 }
     32 
     33 Uint32 SDL_GetTicks (void)
     34 {
     35 	SDL_Unsupported();
     36 	return 0;
     37 }
     38 
     39 void SDL_Delay (Uint32 ms)
     40 {
     41 	SDL_Unsupported();
     42 }
     43 
     44 #include "SDL_thread.h"
     45 
     46 /* Data to handle a single periodic alarm */
     47 static int timer_alive = 0;
     48 static SDL_Thread *timer = NULL;
     49 
     50 static int RunTimer(void *unused)
     51 {
     52 	while ( timer_alive ) {
     53 		if ( SDL_timer_running ) {
     54 			SDL_ThreadedTimerCheck();
     55 		}
     56 		SDL_Delay(1);
     57 	}
     58 	return(0);
     59 }
     60 
     61 /* This is only called if the event thread is not running */
     62 int SDL_SYS_TimerInit(void)
     63 {
     64 	timer_alive = 1;
     65 	timer = SDL_CreateThread(RunTimer, NULL);
     66 	if ( timer == NULL )
     67 		return(-1);
     68 	return(SDL_SetTimerThreaded(1));
     69 }
     70 
     71 void SDL_SYS_TimerQuit(void)
     72 {
     73 	timer_alive = 0;
     74 	if ( timer ) {
     75 		SDL_WaitThread(timer, NULL);
     76 		timer = NULL;
     77 	}
     78 }
     79 
     80 int SDL_SYS_StartTimer(void)
     81 {
     82 	SDL_SetError("Internal logic error: threaded timer in use");
     83 	return(-1);
     84 }
     85 
     86 void SDL_SYS_StopTimer(void)
     87 {
     88 	return;
     89 }
     90 
     91 #endif /* SDL_TIMER_DUMMY || SDL_TIMERS_DISABLED */
     92