Mercurial > sdl-ios-xcode

annotate src/timer/dc/SDL_systimer.c @ 3844:332a59e39ce1 SDL-ryan-multiple-audio-device

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I really don't want to update these last two audio backends...I added an error that says if no one complains, the backends will be removed eventually. So if anyone ever wants them and they care enough to speak up, we'll know to do something about it. If no one does, that's less code to maintain. :)
author Ryan C. Gordon <icculus@icculus.org>
date Tue, 17 Oct 2006 06:45:17 +0000
parents c121d94672cb
children 99210400e8b9
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 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
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40 SDL_StartTicks(void)
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41 {
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42 /* Set first ticks value */
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43 start = jiffies;
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44 }
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45
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46 Uint32
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47 SDL_GetTicks(void)
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48 {
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49 return ((jiffies - start) * 1000 / HZ);
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50 }
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51
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52 void
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53 SDL_Delay(Uint32 ms)
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54 {
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55 thd_sleep(ms);
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56 }
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57
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58 /* Data to handle a single periodic alarm */
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59 static int timer_alive = 0;
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60 static SDL_Thread *timer = NULL;
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61
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62 static int
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63 RunTimer(void *unused)
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64 {
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65 while (timer_alive) {
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66 if (SDL_timer_running) {
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67 SDL_ThreadedTimerCheck();
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68 }
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69 SDL_Delay(10);
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70 }
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71 return (0);
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72 }
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73
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74 /* This is only called if the event thread is not running */
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75 int
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76 SDL_SYS_TimerInit(void)
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77 {
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78 timer_alive = 1;
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79 timer = SDL_CreateThread(RunTimer, NULL);
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80 if (timer == NULL)
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81 return (-1);
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82 return (SDL_SetTimerThreaded(1));
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83 }
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84
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85 void
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86 SDL_SYS_TimerQuit(void)
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87 {
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88 timer_alive = 0;
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89 if (timer) {
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90 SDL_WaitThread(timer, NULL);
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91 timer = NULL;
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92 }
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93 }
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94
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95 int
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96 SDL_SYS_StartTimer(void)
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97 {
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98 SDL_SetError("Internal logic error: DC uses threaded timer");
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99 return (-1);
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100 }
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101
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102 void
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103 SDL_SYS_StopTimer(void)
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104 {
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105 return;
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106 }
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107
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108 #endif /* SDL_TIMER_DC */
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109 /* vi: set ts=4 sw=4 expandtab: */