|
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 |
|
34 void SDL_StartTicks(void) |
|
35 { |
|
36 /* Set first ticks value */ |
|
37 start = system_time(); |
|
38 } |
|
39 |
|
40 Uint32 SDL_GetTicks(void) |
|
41 { |
|
42 return((system_time()-start)/1000); |
|
43 } |
|
44 |
|
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 |
|
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 */ |
|
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 |
|
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 |
|
84 int SDL_SYS_StartTimer(void) |
|
85 { |
|
86 SDL_SetError("Internal logic error: BeOS uses threaded timer"); |
|
87 return(-1); |
|
88 } |
|
89 |
|
90 void SDL_SYS_StopTimer(void) |
|
91 { |
|
92 return; |
|
93 } |
|
94 |
|
95 #endif /* SDL_TIMER_BEOS */ |