Mercurial > sdl-ios-xcode

annotate src/timer/dc/SDL_systimer.c @ 1795:398ac0f88e4d

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Fixed bug #220 The AltiVec blitters don't compile, since they require __VEC__ to be enabled in order for the compiler to understand "vector" and friends (i.e. do AltiVec) But you don't want to turn AltiVec on globally, since then the code would only run on a G4 (there are already runtime tests, before using the AltiVec variants) The solution here is to enable AltiVec locally, for the actual AltiVec code.
author Sam Lantinga <slouken@libsdl.org>
date Tue, 09 May 2006 15:09:47 +0000
parents 92947e3a18db
children 782fd950bd46 c121d94672cb a1b03ba2fcd0
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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 #ifdef SDL_TIMER_DC
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25
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26 #include <kos.h>
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27
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28 #include "SDL_thread.h"
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29 #include "SDL_timer.h"
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30 #include "../SDL_timer_c.h"
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31
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32 static unsigned start;
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33
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34 /*
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35 jif = ms * HZ /1000
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36 ms = jif * 1000/HZ
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37 */
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38
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39 void SDL_StartTicks(void)
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40 {
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41 /* Set first ticks value */
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42 start = jiffies;
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43 }
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44
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45 Uint32 SDL_GetTicks(void)
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46 {
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47 return((jiffies-start)*1000/HZ);
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48 }
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49
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50 void SDL_Delay(Uint32 ms)
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51 {
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52 thd_sleep(ms);
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53 }
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54
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55 /* Data to handle a single periodic alarm */
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56 static int timer_alive = 0;
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57 static SDL_Thread *timer = NULL;
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58
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59 static int RunTimer(void *unused)
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60 {
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61 while ( timer_alive ) {
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62 if ( SDL_timer_running ) {
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63 SDL_ThreadedTimerCheck();
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64 }
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65 SDL_Delay(10);
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66 }
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67 return(0);
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68 }
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69
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70 /* This is only called if the event thread is not running */
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71 int SDL_SYS_TimerInit(void)
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72 {
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73 timer_alive = 1;
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74 timer = SDL_CreateThread(RunTimer, NULL);
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75 if ( timer == NULL )
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76 return(-1);
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77 return(SDL_SetTimerThreaded(1));
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78 }
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79
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80 void SDL_SYS_TimerQuit(void)
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81 {
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82 timer_alive = 0;
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83 if ( timer ) {
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84 SDL_WaitThread(timer, NULL);
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85 timer = NULL;
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86 }
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87 }
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88
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89 int SDL_SYS_StartTimer(void)
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90 {
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91 SDL_SetError("Internal logic error: DC uses threaded timer");
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92 return(-1);
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93 }
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94
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95 void SDL_SYS_StopTimer(void)
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96 {
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97 return;
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98 }
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99
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100 #endif /* SDL_TIMER_DC */