Mercurial > sdl-ios-xcode
annotate src/timer/beos/SDL_systimer.c @ 869:ae4ab3ac89a9
Instructive comments from Max Horn
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Thu, 04 Mar 2004 05:39:17 +0000 |
| parents | b8d311d90021 |
| children | c9b51268668f |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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b8d311d90021
Updated copyright information for 2004 (Happy New Year!)
Sam Lantinga <slouken@libsdl.org>
parents:
297
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changeset
|
3 Copyright (C) 1997-2004 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 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 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
|
252
e8157fcb3114
Updated the source with the correct e-mail address
Sam Lantinga <slouken@libsdl.org>
parents:
0
diff
changeset
|
20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 #include <be/kernel/OS.h> | |
| 29 | |
| 30 #include "SDL_thread.h" | |
| 31 #include "SDL_timer.h" | |
| 32 #include "SDL_error.h" | |
| 33 #include "SDL_timer_c.h" | |
| 34 | |
| 35 static bigtime_t start; | |
| 36 | |
| 37 void SDL_StartTicks(void) | |
| 38 { | |
| 39 /* Set first ticks value */ | |
| 40 start = system_time(); | |
| 41 } | |
| 42 | |
| 43 Uint32 SDL_GetTicks(void) | |
| 44 { | |
| 45 return((system_time()-start)/1000); | |
| 46 } | |
| 47 | |
| 48 void SDL_Delay(Uint32 ms) | |
| 49 { | |
| 50 snooze(ms*1000); | |
| 51 } | |
| 52 | |
| 53 /* Data to handle a single periodic alarm */ | |
| 54 static int timer_alive = 0; | |
| 55 static SDL_Thread *timer = NULL; | |
| 56 | |
| 57 static int RunTimer(void *unused) | |
| 58 { | |
| 59 while ( timer_alive ) { | |
| 60 if ( SDL_timer_running ) { | |
| 61 SDL_ThreadedTimerCheck(); | |
| 62 } | |
| 63 SDL_Delay(10); | |
| 64 } | |
| 65 return(0); | |
| 66 } | |
| 67 | |
| 68 /* This is only called if the event thread is not running */ | |
| 69 int SDL_SYS_TimerInit(void) | |
| 70 { | |
| 71 timer_alive = 1; | |
| 72 timer = SDL_CreateThread(RunTimer, NULL); | |
| 73 if ( timer == NULL ) | |
| 74 return(-1); | |
| 75 return(SDL_SetTimerThreaded(1)); | |
| 76 } | |
| 77 | |
| 78 void SDL_SYS_TimerQuit(void) | |
| 79 { | |
| 80 timer_alive = 0; | |
| 81 if ( timer ) { | |
| 82 SDL_WaitThread(timer, NULL); | |
| 83 timer = NULL; | |
| 84 } | |
| 85 } | |
| 86 | |
| 87 int SDL_SYS_StartTimer(void) | |
| 88 { | |
| 89 SDL_SetError("Internal logic error: BeOS uses threaded timer"); | |
| 90 return(-1); | |
| 91 } | |
| 92 | |
| 93 void SDL_SYS_StopTimer(void) | |
| 94 { | |
| 95 return; | |
| 96 } |