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annotate src/timer/dc/SDL_systimer.c @ 767:d9e79e31a7b7

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Date: Mon, 17 Nov 2003 21:59:24 -0800 From: Pete Shinners Subject: [SDL] directfb cursor patch here is a quick and dirty patch that allows directfb to change the visibility of the cursor. this display backend still has no way to change the actual cursor shape, but being able to set the cursor visibility is a simple change that should offer some benefits. the code was largely based on the cursor code for other sdl backends. and this documentation. http://directfb.org/documentation/DirectFB_Reference/IDirectFBDisplayLayer_SetCursorOpacity.html
author Sam Lantinga <slouken@libsdl.org>
date Sun, 04 Jan 2004 15:57:16 +0000
parents dad72daf44b3
children b8d311d90021
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 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 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 }