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annotate src/timer/riscos/SDL_systimer.c @ 4466:ba66ff156955

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Added the automated test plist file and modified .hgignore to be less aggressive. Discovered that the new plist file for the automated test was not checked in because the .hgignore file was too aggressive. I changed the .hgignore to not ignore the Xcode directory and instead added a longer list of things to ignore.
author Eric Wing <ewing . public |-at-| gmail . com>
date Wed, 12 May 2010 12:49:28 -0700
parents f7b03b6838cb
children
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_RISCOS
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25
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26 #include <stdio.h>
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27 #include <time.h>
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28 #include <sys/time.h>
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29 #include <unistd.h>
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30 #include <string.h>
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31 #include <errno.h>
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32
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33 #include "SDL_timer.h"
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34 #include "../SDL_timer_c.h"
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35
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36 #if SDL_THREADS_DISABLED
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37 /* Timer SDL_arraysize(Timer ),start/reset time */
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38 static Uint32 timerStart;
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39 /* Timer running function */
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40 void RISCOS_CheckTimer();
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41 #else
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42 #include <pthread.h>
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43 extern SDL_threadID riscos_main_thread;
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44 extern int riscos_using_threads;
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45 extern SDL_threadID SDL_ThreadID();
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46 extern SDL_threadID SDL_EventThreadID(void);
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47 #endif
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48
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49
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50 extern void RISCOS_BackgroundTasks(void);
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51
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52 /* The first ticks value of the application */
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53 clock_t start;
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54
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55 void
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56 SDL_StartTicks(void)
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57 {
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58 /* Set first ticks value */
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59 start = clock();
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60 }
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61
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62 Uint32
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63 SDL_GetTicks(void)
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64 {
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65 clock_t ticks;
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66
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67 ticks = clock() - start;
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68
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69
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70 #if CLOCKS_PER_SEC == 1000
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71
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72 return (ticks);
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73
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74 #elif CLOCKS_PER_SEC == 100
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75
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76 return (ticks * 10);
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77
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78 #else
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79
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80 return ticks * (1000 / CLOCKS_PER_SEC);
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81
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82 #endif
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83
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84 }
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85
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86 void
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87 SDL_Delay(Uint32 ms)
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88 {
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89 Uint32 now, then, elapsed;
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90 #if !SDL_THREADS_DISABLED
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91 int is_event_thread;
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92 if (riscos_using_threads) {
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93 is_event_thread = 0;
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94 if (SDL_EventThreadID()) {
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95 if (SDL_EventThreadID() == SDL_ThreadID())
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96 is_event_thread = 1;
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97 } else if (SDL_ThreadID() == riscos_main_thread)
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98 is_event_thread = 1;
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99 } else
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100 is_event_thread = 1;
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101 #endif
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102
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103 /*TODO: Next version of Unixlib may allow us to use usleep here */
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104 /* for non event threads */
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105
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106 /* Set the timeout interval - Linux only needs to do this once */
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107 then = SDL_GetTicks();
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108
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109 do {
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110 /* Do background tasks required while sleeping as we are not multithreaded */
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111 #if SDL_THREADS_DISABLED
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112 RISCOS_BackgroundTasks();
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113 #else
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114 /* For threaded build only run background tasks in event thread */
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115 if (is_event_thread)
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116 RISCOS_BackgroundTasks();
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117 #endif
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118
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119 /* Calculate the time interval left (in case of interrupt) */
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120 now = SDL_GetTicks();
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121 elapsed = (now - then);
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122 then = now;
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123 if (elapsed >= ms) {
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124 break;
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125 }
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126 ms -= elapsed;
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127 #if !SDL_THREADS_DISABLED
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128 /* Need to yield to let other threads have a go */
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129 if (riscos_using_threads)
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130 pthread_yield();
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131 #endif
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132
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133 } while (1);
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134 }
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135
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136 #if SDL_THREADS_DISABLED
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137
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138 /* Non-threaded version of timer */
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139
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140 int
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141 SDL_SYS_TimerInit(void)
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142 {
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143 return (0);
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144 }
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145
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146 void
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147 SDL_SYS_TimerQuit(void)
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148 {
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149 SDL_SetTimer(0, NULL);
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150 }
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151
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152 int
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153 SDL_SYS_StartTimer(void)
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154 {
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155 timerStart = SDL_GetTicks();
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156
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157 return (0);
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158 }
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159
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160 void
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161 SDL_SYS_StopTimer(void)
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162 {
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163 /* Don't need to do anything as we use SDL_timer_running
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164 to detect if we need to check the timer */
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165 }
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166
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167
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168 void
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169 RISCOS_CheckTimer()
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170 {
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171 if (SDL_timer_running
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172 && SDL_GetTicks() - timerStart >= SDL_alarm_interval) {
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173 Uint32 ms;
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174
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175 ms = SDL_alarm_callback(SDL_alarm_interval);
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176 if (ms != SDL_alarm_interval) {
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177 if (ms) {
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178 SDL_alarm_interval = ROUND_RESOLUTION(ms);
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179 } else {
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180 SDL_alarm_interval = 0;
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181 SDL_timer_running = 0;
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182 }
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183 }
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184 if (SDL_alarm_interval)
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185 timerStart = SDL_GetTicks();
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186 }
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187 }
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188
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189 #else
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190
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191 /* Threaded version of timer - based on code for linux */
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192
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193 #include "SDL_thread.h"
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194
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195 /* Data to handle a single periodic alarm */
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196 static int timer_alive = 0;
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197 static SDL_Thread *timer = NULL;
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198
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199 static int
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200 RunTimer(void *unused)
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201 {
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202 while (timer_alive) {
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203 if (SDL_timer_running) {
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204 SDL_ThreadedTimerCheck();
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205 }
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206 SDL_Delay(1);
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207 }
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208 return (0);
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209 }
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210
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211 /* This is only called if the event thread is not running */
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212 int
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213 SDL_SYS_TimerInit(void)
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214 {
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215 timer_alive = 1;
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216 timer = SDL_CreateThread(RunTimer, NULL);
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217 if (timer == NULL)
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218 return (-1);
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219 return (SDL_SetTimerThreaded(1));
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220 }
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221
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222 void
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223 SDL_SYS_TimerQuit(void)
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224 {
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225 timer_alive = 0;
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226 if (timer) {
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227 SDL_WaitThread(timer, NULL);
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228 timer = NULL;
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229 }
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230 }
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231
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232 int
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233 SDL_SYS_StartTimer(void)
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234 {
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235 SDL_SetError("Internal logic error: RISC OS uses threaded timer");
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236 return (-1);
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237 }
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238
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239 void
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240 SDL_SYS_StopTimer(void)
955
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241 {
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242 return;
955
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243 }
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244
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245 #endif /* SDL_THREADS_DISABLED */
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246
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247 #endif /* SDL_TIMER_RISCOS */
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248 /* vi: set ts=4 sw=4 expandtab: */