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annotate src/timer/beos/SDL_systimer.c @ 4841:740e833b2c00

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Fixed overwriting of SDL_shape.c in merge.
author Eli Gottlieb <eligottlieb@gmail.com>
date Mon, 09 Aug 2010 20:27:45 -0400
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 #ifdef SDL_TIMER_BEOS
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25
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26 #include <be/kernel/OS.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 bigtime_t start;
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33
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34 void
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35 SDL_StartTicks(void)
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36 {
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37 /* Set first ticks value */
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38 start = system_time();
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39 }
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40
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41 Uint32
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42 SDL_GetTicks(void)
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43 {
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44 return ((system_time() - start) / 1000);
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45 }
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46
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47 void
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48 SDL_Delay(Uint32 ms)
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49 {
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50 snooze(ms * 1000);
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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
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58 RunTimer(void *unused)
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59 {
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60 while (timer_alive) {
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61 if (SDL_timer_running) {
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62 SDL_ThreadedTimerCheck();
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63 }
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64 SDL_Delay(10);
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65 }
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66 return (0);
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67 }
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68
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69 /* This is only called if the event thread is not running */
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70 int
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71 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
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81 SDL_SYS_TimerQuit(void)
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82 {
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83 timer_alive = 0;
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84 if (timer) {
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85 SDL_WaitThread(timer, NULL);
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86 timer = NULL;
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87 }
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88 }
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89
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90 int
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91 SDL_SYS_StartTimer(void)
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92 {
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93 SDL_SetError("Internal logic error: BeOS uses threaded timer");
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94 return (-1);
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95 }
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96
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97 void
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98 SDL_SYS_StopTimer(void)
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99 {
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100 return;
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101 }
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102
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103 #endif /* SDL_TIMER_BEOS */
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104 /* vi: set ts=4 sw=4 expandtab: */