Mercurial > sdl-ios-xcode
annotate src/timer/beos/SDL_systimer.c @ 3955:40b6b5744e05 SDL-1.2
Avoid switch to supervisor mode in SDL_GetTicks, by updating system counter from vbl interrupt
| author | Patrice Mandin <patmandin@gmail.com> |
|---|---|
| date | Sat, 09 Jun 2007 19:52:05 +0000 |
| parents | 92947e3a18db |
| children | 782fd950bd46 c121d94672cb a1b03ba2fcd0 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
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Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
|
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Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
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6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
|
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Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
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8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 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 | |
|
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c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
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13 Lesser General Public License for more details. |
| 0 | 14 |
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1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
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15 You should have received a copy of the GNU Lesser General Public |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
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16 License along with this library; if not, write to the Free Software |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
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Updated the source with the correct e-mail address
Sam Lantinga <slouken@libsdl.org>
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20 slouken@libsdl.org |
| 0 | 21 */ |
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Use consistent identifiers for the various platforms we support.
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22 #include "SDL_config.h" |
| 0 | 23 |
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Make sure code is only compiled if the appropriate subsystem is enabled
Sam Lantinga <slouken@libsdl.org>
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24 #ifdef SDL_TIMER_BEOS |
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92947e3a18db
Make sure code is only compiled if the appropriate subsystem is enabled
Sam Lantinga <slouken@libsdl.org>
parents:
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25 |
| 0 | 26 #include <be/kernel/OS.h> |
| 27 | |
| 28 #include "SDL_thread.h" | |
| 29 #include "SDL_timer.h" | |
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New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
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30 #include "../SDL_timer_c.h" |
| 0 | 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 } | |
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1635
92947e3a18db
Make sure code is only compiled if the appropriate subsystem is enabled
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
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94 |
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92947e3a18db
Make sure code is only compiled if the appropriate subsystem is enabled
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
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95 #endif /* SDL_TIMER_BEOS */ |