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annotate src/timer/riscos/SDL_systimer.c @ 693:6c119628180d

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Date: Sat, 16 Aug 2003 16:22:56 +0300 From: "Mike Gorchak" Subject: Package building for QNX6 I'm just completed the package description file for QNX6 - qpg, it is like a\ .spec files for Linux. Please place SDL.qpg.in file in the root of the proj\ ect, where .spec file is placed. And sdl12qpg.diff - just adding the SDL.qpg\ .in. The same for the SDL_image. I'm planning to add .qpg files creation for\ all SDL* projects. As for shared library building for QNX6. It is very hard to improve the exis\ ting libtool code to support QNX shared libraries. Much easyiest is to remov\ e libtool.m4 code from the acinclude.m4 for those persons, who building shar\ ed libraries for QNX6. I'm described all what they need to do with .so under\ QNX6 in the README.QNX file. And 90% of people used the precompiled librari\ es, so I think it is not big problem :)
author Sam Lantinga <slouken@libsdl.org>
date Sat, 23 Aug 2003 23:25:46 +0000
parents 550bccdf04bd
children b8d311d90021
rev   line source
630
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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 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 Sam Lantinga
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20 slouken@devolution.com
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21 */
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22
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 #include <stdio.h>
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29 #include <time.h>
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30 #include <sys/time.h>
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31 #include <unistd.h>
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32 #include <string.h>
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33 #include <errno.h>
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34
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35 #include "SDL_error.h"
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36 #include "SDL_timer.h"
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37 #include "SDL_timer_c.h"
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38
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39 /* Timer start/reset time */
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40 static Uint32 timerStart;
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41 /* Timer running function */
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42 void RISCOS_CheckTimer();
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43
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44 extern void RISCOS_BackgroundTasks(void);
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45
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46 /* The first ticks value of the application */
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47 clock_t start;
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48
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49 void SDL_StartTicks(void)
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50 {
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51 /* Set first ticks value */
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52 start = clock();
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53 }
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54
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55 Uint32 SDL_GetTicks (void)
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56 {
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57 clock_t ticks;
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58
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59 ticks=clock()-start;
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60
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61
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62 #if CLOCKS_PER_SEC == 1000
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63
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64 return(ticks);
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65
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66 #elif CLOCKS_PER_SEC == 100
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67
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68 return (ticks * 10);
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69
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70 #else
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71
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72 return ticks*(1000/CLOCKS_PER_SEC);
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73
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74 #endif
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75
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76 }
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77
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78 extern void DRenderer_FillBuffers();
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79
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80 void SDL_Delay (Uint32 ms)
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81 {
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82 Uint32 now,then,elapsed;
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83
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84 /* Set the timeout interval - Linux only needs to do this once */
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85 then = SDL_GetTicks();
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86
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87 do {
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88 /* Do background tasks required while sleeping as we are not multithreaded */
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89 RISCOS_BackgroundTasks();
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90 /* Calculate the time interval left (in case of interrupt) */
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91 now = SDL_GetTicks();
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92 elapsed = (now-then);
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93 then = now;
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94 if ( elapsed >= ms ) {
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95 break;
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96 }
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97 ms -= elapsed;
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98
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99 } while ( 1 );
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100 }
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101
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102 int SDL_SYS_TimerInit(void)
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103 {
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104 return(0);
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105 }
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106
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107 void SDL_SYS_TimerQuit(void)
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108 {
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109 SDL_SetTimer(0, NULL);
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110 }
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111
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112 int SDL_SYS_StartTimer(void)
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113 {
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114 timerStart = SDL_GetTicks();
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115
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116 return(0);
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117 }
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118
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119 void SDL_SYS_StopTimer(void)
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120 {
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121 /* Don't need to do anything as we use SDL_timer_running
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122 to detect if we need to check the timer */
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123 }
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124
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125
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126 void RISCOS_CheckTimer()
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127 {
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128 if (SDL_timer_running && SDL_GetTicks() - timerStart >= SDL_alarm_interval)
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129 {
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130 Uint32 ms;
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131
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132 ms = SDL_alarm_callback(SDL_alarm_interval);
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133 if ( ms != SDL_alarm_interval )
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134 {
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135 if ( ms )
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136 {
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137 SDL_alarm_interval = ROUND_RESOLUTION(ms);
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138 } else
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139 {
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140 SDL_alarm_interval = 0;
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141 SDL_timer_running = 0;
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142 }
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143 }
550bccdf04bd Added initial support for RISC OS (thanks Peter Naulls!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
144 if (SDL_alarm_interval) timerStart = SDL_GetTicks();
550bccdf04bd Added initial support for RISC OS (thanks Peter Naulls!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
145 }
550bccdf04bd Added initial support for RISC OS (thanks Peter Naulls!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
146 }