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annotate src/timer/dc/SDL_systimer.c @ 1208:d90b362628ea

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From: "alan buckley" <alan_baa@hotmail.com> Subject: Patch for RISC OS cursor palette handling in SDL Date: Mon, 07 Nov 2005 09:14:15 -0800 The mouse cursor palette was not correctly restored on RISC OS if the system was using anything but the default mouse colours. Additionally I've modifed the order the wait for vsync is called as it should be after the screen bank switching.
author Sam Lantinga <slouken@libsdl.org>
date Fri, 23 Dec 2005 09:40:15 +0000
parents b8d311d90021
children c9b51268668f
rev   line source
509
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2004 Sam Lantinga
509
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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 Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 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 Library 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 Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 BERO
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20 bero@geocities.co.jp
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21
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22 based on win32/SDL_systimer.c
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23
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24 Sam Lantinga
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25 slouken@libsdl.org
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26 */
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27
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28 #ifdef SAVE_RCSID
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29 static char rcsid =
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30 "@(#) $Id$";
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31 #endif
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32
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33 #include <kos.h>
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34
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35 #include "SDL_thread.h"
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36 #include "SDL_timer.h"
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37 #include "SDL_error.h"
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38 #include "SDL_timer_c.h"
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39
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40 static unsigned start;
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41
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42 /*
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43 jif = ms * HZ /1000
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44 ms = jif * 1000/HZ
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45 */
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46
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47 void SDL_StartTicks(void)
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48 {
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49 /* Set first ticks value */
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50 start = jiffies;
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51 }
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52
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53 Uint32 SDL_GetTicks(void)
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54 {
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55 return((jiffies-start)*1000/HZ);
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56 }
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57
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58 void SDL_Delay(Uint32 ms)
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59 {
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60 thd_sleep(ms);
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61 }
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62
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63 /* Data to handle a single periodic alarm */
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64 static int timer_alive = 0;
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65 static SDL_Thread *timer = NULL;
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66
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67 static int RunTimer(void *unused)
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68 {
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69 while ( timer_alive ) {
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70 if ( SDL_timer_running ) {
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71 SDL_ThreadedTimerCheck();
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72 }
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73 SDL_Delay(10);
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74 }
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75 return(0);
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76 }
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77
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78 /* This is only called if the event thread is not running */
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79 int SDL_SYS_TimerInit(void)
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80 {
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81 timer_alive = 1;
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82 timer = SDL_CreateThread(RunTimer, NULL);
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83 if ( timer == NULL )
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84 return(-1);
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85 return(SDL_SetTimerThreaded(1));
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86 }
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87
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88 void SDL_SYS_TimerQuit(void)
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89 {
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90 timer_alive = 0;
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91 if ( timer ) {
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92 SDL_WaitThread(timer, NULL);
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93 timer = NULL;
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94 }
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95 }
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96
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97 int SDL_SYS_StartTimer(void)
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98 {
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99 SDL_SetError("Internal logic error: DC uses threaded timer");
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100 return(-1);
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101 }
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102
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103 void SDL_SYS_StopTimer(void)
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104 {
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105 return;
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106 }