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annotate src/timer/dummy/SDL_systimer.c @ 1484:b2b476a4a73c

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Added documentation on how to build a completely useless SDL library. :)
author Sam Lantinga <slouken@libsdl.org>
date Wed, 08 Mar 2006 08:30:17 +0000
parents d910939febfa
children 92947e3a18db
rev   line source
1361
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 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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d910939febfa Use consistent identifiers for the various platforms we support.
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22 #include "SDL_config.h"
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23
1484
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24 #include "SDL_timer.h"
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25 #include "../SDL_timer_c.h"
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26
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27 void SDL_StartTicks(void)
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28 {
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29 }
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30
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31 Uint32 SDL_GetTicks (void)
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32 {
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33 SDL_Unsupported();
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34 return 0;
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35 }
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36
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37 void SDL_Delay (Uint32 ms)
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38 {
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39 SDL_Unsupported();
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40 }
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41
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42 #include "SDL_thread.h"
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43
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44 /* Data to handle a single periodic alarm */
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45 static int timer_alive = 0;
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46 static SDL_Thread *timer = NULL;
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47
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48 static int RunTimer(void *unused)
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49 {
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50 while ( timer_alive ) {
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51 if ( SDL_timer_running ) {
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52 SDL_ThreadedTimerCheck();
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53 }
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54 SDL_Delay(1);
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55 }
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56 return(0);
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57 }
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58
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59 /* This is only called if the event thread is not running */
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60 int SDL_SYS_TimerInit(void)
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61 {
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62 timer_alive = 1;
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63 timer = SDL_CreateThread(RunTimer, NULL);
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64 if ( timer == NULL )
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65 return(-1);
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66 return(SDL_SetTimerThreaded(1));
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67 }
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68
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69 void SDL_SYS_TimerQuit(void)
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70 {
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71 timer_alive = 0;
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72 if ( timer ) {
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73 SDL_WaitThread(timer, NULL);
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74 timer = NULL;
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75 }
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76 }
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77
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78 int SDL_SYS_StartTimer(void)
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79 {
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80 SDL_SetError("Internal logic error: threaded timer in use");
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81 return(-1);
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82 }
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83
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84 void SDL_SYS_StopTimer(void)
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85 {
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86 return;
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87 }