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1 /*
2     SDL - Simple DirectMedia Layer
3     Copyright (C) 1997-2006 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@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 
SDL_StartTicks(void)29 void SDL_StartTicks(void)
30 {
31 }
32 
SDL_GetTicks(void)33 Uint32 SDL_GetTicks (void)
34 {
35 	SDL_Unsupported();
36 	return 0;
37 }
38 
SDL_Delay(Uint32 ms)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 
RunTimer(void * unused)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 */
SDL_SYS_TimerInit(void)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 
SDL_SYS_TimerQuit(void)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 
SDL_SYS_StartTimer(void)80 int SDL_SYS_StartTimer(void)
81 {
82 	SDL_SetError("Internal logic error: threaded timer in use");
83 	return(-1);
84 }
85 
SDL_SYS_StopTimer(void)86 void SDL_SYS_StopTimer(void)
87 {
88 	return;
89 }
90 
91 #endif /* SDL_TIMER_DUMMY || SDL_TIMERS_DISABLED */
92