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annotate src/timer/dummy/SDL_systimer.c @ 4918:f5f70fed2c4c

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Added a Visual Studio project for testgesture
author Sam Lantinga <slouken@libsdl.org>
date Tue, 30 Nov 2010 12:38:46 -0800
parents f7b03b6838cb
children 481dabb098ef
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2010 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
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30 SDL_StartTicks(void)
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31 {
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32 }
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33
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34 Uint32
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35 SDL_GetTicks(void)
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36 {
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37 SDL_Unsupported();
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38 return 0;
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39 }
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40
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41 void
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42 SDL_Delay(Uint32 ms)
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43 {
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44 SDL_Unsupported();
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45 }
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46
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47 #include "SDL_thread.h"
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48
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49 /* Data to handle a single periodic alarm */
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50 static int timer_alive = 0;
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51 static SDL_Thread *timer = NULL;
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52
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53 static int
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54 RunTimer(void *unused)
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55 {
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56 while (timer_alive) {
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57 if (SDL_timer_running) {
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58 SDL_ThreadedTimerCheck();
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59 }
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60 SDL_Delay(1);
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61 }
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62 return (0);
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63 }
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64
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65 /* This is only called if the event thread is not running */
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66 int
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67 SDL_SYS_TimerInit(void)
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68 {
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69 timer_alive = 1;
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70 timer = SDL_CreateThread(RunTimer, NULL);
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71 if (timer == NULL)
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72 return (-1);
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73 return (SDL_SetTimerThreaded(1));
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74 }
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75
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76 void
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77 SDL_SYS_TimerQuit(void)
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78 {
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79 timer_alive = 0;
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80 if (timer) {
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81 SDL_WaitThread(timer, NULL);
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82 timer = NULL;
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83 }
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84 }
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85
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86 int
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87 SDL_SYS_StartTimer(void)
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88 {
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89 SDL_SetError("Internal logic error: threaded timer in use");
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90 return (-1);
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91 }
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92
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93 void
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94 SDL_SYS_StopTimer(void)
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95 {
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96 return;
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97 }
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98
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99 #endif /* SDL_TIMER_DUMMY || SDL_TIMERS_DISABLED */
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100 /* vi: set ts=4 sw=4 expandtab: */