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 #ifdef SDL_TIMER_BEOS
25
26 #include <be/kernel/OS.h>
27
28 #include "SDL_thread.h"
29 #include "SDL_timer.h"
30 #include "../SDL_timer_c.h"
31
32 static bigtime_t start;
33
SDL_StartTicks(void)34 void SDL_StartTicks(void)
35 {
36 /* Set first ticks value */
37 start = system_time();
38 }
39
SDL_GetTicks(void)40 Uint32 SDL_GetTicks(void)
41 {
42 return((system_time()-start)/1000);
43 }
44
SDL_Delay(Uint32 ms)45 void SDL_Delay(Uint32 ms)
46 {
47 snooze(ms*1000);
48 }
49
50 /* Data to handle a single periodic alarm */
51 static int timer_alive = 0;
52 static SDL_Thread *timer = NULL;
53
RunTimer(void * unused)54 static int RunTimer(void *unused)
55 {
56 while ( timer_alive ) {
57 if ( SDL_timer_running ) {
58 SDL_ThreadedTimerCheck();
59 }
60 SDL_Delay(10);
61 }
62 return(0);
63 }
64
65 /* This is only called if the event thread is not running */
SDL_SYS_TimerInit(void)66 int SDL_SYS_TimerInit(void)
67 {
68 timer_alive = 1;
69 timer = SDL_CreateThread(RunTimer, NULL);
70 if ( timer == NULL )
71 return(-1);
72 return(SDL_SetTimerThreaded(1));
73 }
74
SDL_SYS_TimerQuit(void)75 void SDL_SYS_TimerQuit(void)
76 {
77 timer_alive = 0;
78 if ( timer ) {
79 SDL_WaitThread(timer, NULL);
80 timer = NULL;
81 }
82 }
83
SDL_SYS_StartTimer(void)84 int SDL_SYS_StartTimer(void)
85 {
86 SDL_SetError("Internal logic error: BeOS uses threaded timer");
87 return(-1);
88 }
89
SDL_SYS_StopTimer(void)90 void SDL_SYS_StopTimer(void)
91 {
92 return;
93 }
94
95 #endif /* SDL_TIMER_BEOS */
96