Mercurial > sdl-ios-xcode

annotate src/timer/dc/SDL_systimer.c @ 1622:5bbfc3e20e10

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Fixed bug #191 [I opted to go for a warning, since I often tweak configure.in, but don't want to rebuild the entire project] One thing that was lost in the switch from automake to the new build system is that there is now no rule to build configure from configure.in. IMHO, if configure.in gets changed, then at the very least, the build system should print out a warning (better, again IMHO, an error) about this fact. Else, you easily forget about this when modifying configure.in.
author Sam Lantinga <slouken@libsdl.org>
date Thu, 13 Apr 2006 13:23:56 +0000
parents d910939febfa
children 92947e3a18db
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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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22 #include "SDL_config.h"
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23
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24 #include <kos.h>
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25
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26 #include "SDL_thread.h"
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27 #include "SDL_timer.h"
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28 #include "../SDL_timer_c.h"
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29
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30 static unsigned start;
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31
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32 /*
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33 jif = ms * HZ /1000
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34 ms = jif * 1000/HZ
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35 */
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36
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37 void SDL_StartTicks(void)
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38 {
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39 /* Set first ticks value */
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40 start = jiffies;
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41 }
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42
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43 Uint32 SDL_GetTicks(void)
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44 {
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45 return((jiffies-start)*1000/HZ);
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46 }
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47
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48 void SDL_Delay(Uint32 ms)
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49 {
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50 thd_sleep(ms);
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51 }
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52
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53 /* Data to handle a single periodic alarm */
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54 static int timer_alive = 0;
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55 static SDL_Thread *timer = NULL;
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56
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57 static int RunTimer(void *unused)
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58 {
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59 while ( timer_alive ) {
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60 if ( SDL_timer_running ) {
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61 SDL_ThreadedTimerCheck();
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62 }
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63 SDL_Delay(10);
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64 }
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65 return(0);
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66 }
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67
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68 /* This is only called if the event thread is not running */
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69 int SDL_SYS_TimerInit(void)
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70 {
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71 timer_alive = 1;
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72 timer = SDL_CreateThread(RunTimer, NULL);
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73 if ( timer == NULL )
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74 return(-1);
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75 return(SDL_SetTimerThreaded(1));
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76 }
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77
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78 void SDL_SYS_TimerQuit(void)
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79 {
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80 timer_alive = 0;
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81 if ( timer ) {
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82 SDL_WaitThread(timer, NULL);
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83 timer = NULL;
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84 }
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85 }
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86
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87 int SDL_SYS_StartTimer(void)
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88 {
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89 SDL_SetError("Internal logic error: DC uses threaded timer");
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90 return(-1);
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91 }
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92
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93 void SDL_SYS_StopTimer(void)
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94 {
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95 return;
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96 }