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annotate src/timer/dummy/SDL_systimer.c @ 4159:a1b03ba2fcd0 SDL-1.2

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Updated copyright date
author Sam Lantinga <slouken@libsdl.org>
date Mon, 08 Dec 2008 00:25:42 +0000
parents 92947e3a18db
children
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 #if defined(SDL_TIMER_DUMMY) || defined(SDL_TIMERS_DISABLED)
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25
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26 #include "SDL_timer.h"
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27 #include "../SDL_timer_c.h"
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28
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29 void SDL_StartTicks(void)
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30 {
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31 }
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32
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33 Uint32 SDL_GetTicks (void)
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34 {
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35 SDL_Unsupported();
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36 return 0;
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37 }
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38
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39 void SDL_Delay (Uint32 ms)
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40 {
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41 SDL_Unsupported();
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42 }
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43
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44 #include "SDL_thread.h"
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45
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46 /* Data to handle a single periodic alarm */
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47 static int timer_alive = 0;
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48 static SDL_Thread *timer = NULL;
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49
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50 static int RunTimer(void *unused)
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51 {
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52 while ( timer_alive ) {
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53 if ( SDL_timer_running ) {
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54 SDL_ThreadedTimerCheck();
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55 }
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56 SDL_Delay(1);
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57 }
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58 return(0);
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59 }
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60
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61 /* This is only called if the event thread is not running */
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62 int SDL_SYS_TimerInit(void)
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63 {
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64 timer_alive = 1;
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65 timer = SDL_CreateThread(RunTimer, NULL);
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66 if ( timer == NULL )
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67 return(-1);
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68 return(SDL_SetTimerThreaded(1));
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69 }
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70
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71 void SDL_SYS_TimerQuit(void)
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72 {
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73 timer_alive = 0;
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74 if ( timer ) {
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75 SDL_WaitThread(timer, NULL);
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76 timer = NULL;
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77 }
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78 }
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79
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80 int SDL_SYS_StartTimer(void)
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81 {
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82 SDL_SetError("Internal logic error: threaded timer in use");
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83 return(-1);
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84 }
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85
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86 void SDL_SYS_StopTimer(void)
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87 {
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88 return;
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89 }
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90
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91 #endif /* SDL_TIMER_DUMMY || SDL_TIMERS_DISABLED */