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annotate src/timer/riscos/SDL_systimer.c @ 1438:1f4f09641645

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Date: Sun, 26 Feb 2006 11:25:09 +0900 From: Hayashi Naoyuki Subject: Re: [SDL] CVS stable again, please update SDL ports Some problems are caused on Tru64 UNIX. If applying SDL12-osf1.path, these problems are fixed. 1. configure-script say "recursive mutexes... no" and "pthread semaphores... no". checking for pthreads... yes checking for recursive mutexes... no checking for pthread semaphores... no This is because it compiled without pthread_cflags and pthread_lib when checking recursive mutexes and pthread semaphores. 2. Compiling src/audio/mme/SDL_mmeaudio.c fails. cc: Severe: ./src/audio/mme/SDL_mmeaudio.c, line 25: Cannot find file <mme_api.h> specified in #include directive. (noinclfilef) #include <mme_api.h> -^ This is because BUILD_CFLAGS is wrong. 3. Compiling src/cdrom/osf/SDL_syscdrom.c fails. cc: Warning: ./src/cdrom/osf/SDL_syscdrom.c, line 176: Too few actual parameters in the invocation of the macro "SDL_stack_alloc". (toofewactuals) cdpath = SDL_stack_alloc(len); ------------------------------------^ cc: Error: ./src/cdrom/osf/SDL_syscdrom.c, line 176: Invalid expression. (badexpr) cdpath = SDL_stack_alloc(len); -----------------^ SDL_stack_alloc is defined in include/SDL_stdinc.h. #define SDL_stack_alloc(type, count) (type*)alloca(sizeof(type)*count) 4. Linking fails if running configure with --enable-x11-shared=yes. /usr/ccs/bin/ld: Warning: Unresolved: p_XData32 5. Compiling src/video/x11/SDL_x11dyn.c fails if running configure with --enable-x11-shared=no. cc: Error: ./src/video/x11/SDL_x11sym.h, line 149: In this statement, "_SmtBufferOverflow" is not declared. (undeclared) SDL_X11_SYM(1,void,_SmtBufferOverflow,(Display *dpy,register smtDisplayPtr)) ^ cc: Error: ./src/video/x11/SDL_x11sym.h, line 150: In this statement, "_SmtBufferOverflow" is not declared. (undeclared) SDL_X11_SYM(1,void,_SmtBufferOverflow,(Display *dpy,register smtDisplayPtr)) ^ cc: Error: ./src/video/x11/SDL_x11sym.h, line 150: In this statement, "_SmtIpError" is not declared. (undeclared) SDL_X11_SYM(1,void,_SmtIpError,(Display *dpy,register smtDisplayPtr, int)) ^
author Sam Lantinga <slouken@libsdl.org>
date Sun, 26 Feb 2006 04:54:01 +0000
parents d910939febfa
children 92947e3a18db
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 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 #include <stdio.h>
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25 #include <time.h>
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26 #include <sys/time.h>
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27 #include <unistd.h>
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28 #include <string.h>
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29 #include <errno.h>
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30
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31 #include "SDL_timer.h"
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32 #include "../SDL_timer_c.h"
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33
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34 #if SDL_THREADS_DISABLED
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35 /* Timer SDL_arraysize(Timer ),start/reset time */
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36 static Uint32 timerStart;
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37 /* Timer running function */
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38 void RISCOS_CheckTimer();
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39 #else
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40 #include <pthread.h>
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41 extern Uint32 riscos_main_thread;
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42 extern int riscos_using_threads;
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43 extern Uint32 SDL_ThreadID();
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44 extern Uint32 SDL_EventThreadID(void);
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45 #endif
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46
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47
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48 extern void RISCOS_BackgroundTasks(void);
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49
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50 /* The first ticks value of the application */
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51 clock_t start;
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52
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53 void SDL_StartTicks(void)
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54 {
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55 /* Set first ticks value */
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56 start = clock();
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57 }
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58
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59 Uint32 SDL_GetTicks (void)
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60 {
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61 clock_t ticks;
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62
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63 ticks=clock()-start;
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64
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65
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66 #if CLOCKS_PER_SEC == 1000
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67
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68 return(ticks);
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69
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70 #elif CLOCKS_PER_SEC == 100
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71
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72 return (ticks * 10);
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73
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74 #else
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75
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76 return ticks*(1000/CLOCKS_PER_SEC);
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77
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78 #endif
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79
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80 }
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81
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82 void SDL_Delay (Uint32 ms)
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83 {
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84 Uint32 now,then,elapsed;
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85 #if !SDL_THREADS_DISABLED
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86 int is_event_thread;
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87 if (riscos_using_threads)
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88 {
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89 is_event_thread = 0;
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90 if (SDL_EventThreadID())
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91 {
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92 if (SDL_EventThreadID() == SDL_ThreadID()) is_event_thread = 1;
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93 } else if (SDL_ThreadID() == riscos_main_thread) is_event_thread = 1;
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94 } else is_event_thread = 1;
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95 #endif
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96
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97 /*TODO: Next version of Unixlib may allow us to use usleep here */
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98 /* for non event threads */
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99
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100 /* Set the timeout interval - Linux only needs to do this once */
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101 then = SDL_GetTicks();
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102
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103 do {
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104 /* Do background tasks required while sleeping as we are not multithreaded */
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105 #if SDL_THREADS_DISABLED
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106 RISCOS_BackgroundTasks();
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107 #else
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108 /* For threaded build only run background tasks in event thread */
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109 if (is_event_thread) RISCOS_BackgroundTasks();
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110 #endif
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111
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112 /* Calculate the time interval left (in case of interrupt) */
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113 now = SDL_GetTicks();
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114 elapsed = (now-then);
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115 then = now;
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116 if ( elapsed >= ms ) {
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117 break;
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118 }
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119 ms -= elapsed;
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120 #if !SDL_THREADS_DISABLED
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121 /* Need to yield to let other threads have a go */
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122 if (riscos_using_threads) pthread_yield();
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123 #endif
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124
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125 } while ( 1 );
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126 }
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127
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128 #if SDL_THREADS_DISABLED
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129
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130 /* Non-threaded version of timer */
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131
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132 int SDL_SYS_TimerInit(void)
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133 {
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134 return(0);
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135 }
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136
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137 void SDL_SYS_TimerQuit(void)
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138 {
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139 SDL_SetTimer(0, NULL);
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140 }
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141
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142 int SDL_SYS_StartTimer(void)
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143 {
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144 timerStart = SDL_GetTicks();
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145
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146 return(0);
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147 }
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148
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149 void SDL_SYS_StopTimer(void)
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150 {
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151 /* Don't need to do anything as we use SDL_timer_running
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152 to detect if we need to check the timer */
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153 }
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154
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155
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156 void RISCOS_CheckTimer()
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157 {
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158 if (SDL_timer_running && SDL_GetTicks() - timerStart >= SDL_alarm_interval)
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159 {
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160 Uint32 ms;
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161
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162 ms = SDL_alarm_callback(SDL_alarm_interval);
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163 if ( ms != SDL_alarm_interval )
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164 {
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165 if ( ms )
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166 {
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167 SDL_alarm_interval = ROUND_RESOLUTION(ms);
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168 } else
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169 {
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170 SDL_alarm_interval = 0;
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171 SDL_timer_running = 0;
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172 }
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173 }
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174 if (SDL_alarm_interval) timerStart = SDL_GetTicks();
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175 }
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176 }
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177
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178 #else
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179
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180 /* Threaded version of timer - based on code for linux */
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181
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182 #include "SDL_thread.h"
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183
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184 /* Data to handle a single periodic alarm */
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185 static int timer_alive = 0;
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186 static SDL_Thread *timer = NULL;
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187
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188 static int RunTimer(void *unused)
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189 {
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190 while ( timer_alive ) {
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191 if ( SDL_timer_running ) {
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192 SDL_ThreadedTimerCheck();
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193 }
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194 SDL_Delay(1);
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195 }
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196 return(0);
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197 }
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198
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199 /* This is only called if the event thread is not running */
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200 int SDL_SYS_TimerInit(void)
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201 {
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202 timer_alive = 1;
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203 timer = SDL_CreateThread(RunTimer, NULL);
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204 if ( timer == NULL )
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205 return(-1);
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206 return(SDL_SetTimerThreaded(1));
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207 }
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208
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209 void SDL_SYS_TimerQuit(void)
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210 {
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211 timer_alive = 0;
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212 if ( timer ) {
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213 SDL_WaitThread(timer, NULL);
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214 timer = NULL;
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215 }
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216 }
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217
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218 int SDL_SYS_StartTimer(void)
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219 {
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220 SDL_SetError("Internal logic error: RISC OS uses threaded timer");
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221 return(-1);
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222 }
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223
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224 void SDL_SYS_StopTimer(void)
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225 {
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226 return;
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227 }
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228
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229 #endif /* SDL_THREADS_DISABLED */