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annotate src/timer/amigaos/SDL_systimer.c @ 1312:c9b51268668f

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Updated copyright information and removed rcs id lines (problematic in branch merges) I batch edited these files, so please let me know if I've accidentally removed anybody's credit here.
author Sam Lantinga <slouken@libsdl.org>
date Wed, 01 Feb 2006 06:32:25 +0000
parents b8d311d90021
children c71e05b4dc2e
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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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 #include <stdio.h>
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24 #include <time.h>
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25 #include <signal.h>
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26 #include <unistd.h>
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27 #include <string.h>
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28 #include <errno.h>
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29 #include <exec/types.h>
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30 #ifdef __SASC
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31 #include <proto/dos.h>
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32 #include <clib/graphics_protos.h>
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33 #include <pragmas/graphics.h>
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34 #include <clib/exec_protos.h>
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35 #include <pragmas/exec.h>
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36 #elif defined(STORMC4_WOS)
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37 #include <proto/dos.h>
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38 #include <proto/exec.h>
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39 #include <proto/graphics.h>
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40 #else
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41 #include <inline/dos.h>
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42 #include <inline/exec.h>
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43 #include <inline/graphics.h>
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44 #endif
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45 #include "mydebug.h"
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46
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47 extern struct DosLibrary *DOSBase;
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48 extern struct ExecBase *SysBase;
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49 static struct GfxBase *GfxBase;
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50
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51 #include "SDL_error.h"
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52 #include "SDL_timer.h"
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53 #include "SDL_timer_c.h"
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54
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55 #if defined(DISABLE_THREADS) || defined(FORK_HACK)
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56 #define USE_ITIMER
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57 #endif
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58
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59 /* The first ticks value of the application */
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60
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61 #if !defined(__PPC__) || defined(STORMC4_WOS) || defined(MORPHOS)
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62 static clock_t start;
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63
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64 void SDL_StartTicks(void)
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65 {
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66 /* Set first ticks value */
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67 start=clock();
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68 }
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69
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70 Uint32 SDL_GetTicks (void)
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71 {
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72 clock_t ticks;
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73
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74 ticks=clock()-start;
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75
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76 #ifdef __SASC
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77 // CLOCKS_PER_SEC == 1000 !
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78
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79 return(ticks);
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80 #else
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81 // CLOCKS_PER_SEC != 1000 !
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82
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83 return ticks*(1000/CLOCKS_PER_SEC);
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84 #endif
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85 }
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86
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87 void SDL_Delay (Uint32 ms)
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88 {
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89 // Do a busy wait if time is less than 50ms
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90
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91 if(ms<50)
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92 {
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93 clock_t to_wait=clock();
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94
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95 #ifndef __SASC
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96 ms*=(CLOCKS_PER_SEC/1000);
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97 #endif
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98 to_wait+=ms;
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99
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100 while(clock()<to_wait);
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101 }
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102 else
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103 {
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104 Delay(ms/20);
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105 }
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106 }
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107
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108 #else
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109
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110 ULONG MY_CLOCKS_PER_SEC;
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111
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112 void PPC_TimerInit(void);
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113 APTR MyTimer;
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114
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115 ULONG start[2];
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116
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117 void SDL_StartTicks(void)
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118 {
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119 /* Set first ticks value */
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120 if(!MyTimer)
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121 PPC_TimerInit();
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122
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123 PPCGetTimerObject(MyTimer,PPCTIMERTAG_CURRENTTICKS,start);
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124 start[1]>>=10;
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125 start[1]|=((result[0]&0x3ff)<<22);
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126 start[0]>>=10;
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127 }
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128
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129 Uint32 SDL_GetTicks (void)
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130 {
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131 ULONG result[2];
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132 PPCGetTimerObject(MyTimer,PPCTIMERTAG_CURRENTTICKS,result);
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133
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134 // PPCAsr64p(result,10);
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135 // Non va, la emulo:
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136
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137 result[1]>>=10;
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138 result[1]|=((result[0]&0x3ff)<<22);
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139
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140 // Non mi interessa piu' result[0]
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141
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142 return result[1]*1000/MY_CLOCKS_PER_SEC;
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143 }
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144
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145 void SDL_Delay (Uint32 ms)
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146 {
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147 // Do a busy wait if time is less than 50ms
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148
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149 if(ms<50)
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150 {
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151 ULONG to_wait[2],actual[2];
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152 PPCGetTimerObject(MyTimer,PPCTIMERTAG_CURRENTTICKS,result);
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153 actual[1]=0;
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154 to_wait[1]+=ms*1000/MY_CLOCKS_PER_SEC;
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155
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156 while(actual[1]<to_wait[1])
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157 {
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158 PPCGetTimerObject(MyTimer,PPCTIMERTAG_CURRENTTICKS,actual);
0
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159 }
21
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160 }
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161 else
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162 {
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163 Delay(ms/50);
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164 }
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165 }
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166
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167 void PPC_TimerInit(void)
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168 {
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169 struct TagItem tags[]=
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170 {
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171 PPCTIMERTAG_CPU,TRUE,
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172 TAG_DONE,0
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173 };
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174
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175
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176 if(MyTimer=PPCCreateTimerObject(tags))
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177 {
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178 ULONG result[2];
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179
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180 PPCGetTimerObject(MyTimer,PPCTIMERTAG_TICKSPERSEC,result);
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181 D(bug("Timer inizializzato, TPS: %lu - %lu\n",result[0],result[1]));
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182 // PPCAsr64p(result,10);
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183 result[1]>>=10;
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184 result[1]|=((result[0]&0x3ff)<<22);
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185 result[0]>>=10;
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186
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187 D(bug("Shiftato TPS: %lu - %lu\n",result[0],result[1]));
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188 MY_CLOCKS_PER_SEC=result[1];
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189
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190 PPCGetTimerObject(MyTimer,PPCTIMERTAG_CURRENTTICKS,result);
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191
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192 D(bug("Current ticks: %lu - %lu\n",result[0],result[1]));
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193 result[1]>>=10;
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194 result[1]|=((result[0]&0x3ff)<<22);
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195 result[0]>>=10;
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196 // PPCAsr64p(result,10);
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197 D(bug("Shiftato: %lu - %lu\n",result[0],result[1]));
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198 }
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199 else
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200 {
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201 D(bug("Errore nell'inizializzazione del timer!\n"));
255
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202 }
21
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203 }
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204
0
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205 #endif
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206
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207 #include "SDL_thread.h"
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208
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209 /* Data to handle a single periodic alarm */
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210 static int timer_alive = 0;
21
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211 static SDL_Thread *timer_thread = NULL;
0
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212
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213 static int RunTimer(void *unused)
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214 {
21
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215 D(bug("SYSTimer: Entering RunTimer loop..."));
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216
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217 if(GfxBase==NULL)
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218 GfxBase=(struct GfxBase *)OpenLibrary("graphics.library",37);
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219
0
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220 while ( timer_alive ) {
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221 if ( SDL_timer_running ) {
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222 SDL_ThreadedTimerCheck();
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223 }
21
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224 if(GfxBase)
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225 WaitTOF(); // Check the timer every fifth of seconds. Was SDL_Delay(1)->BusyWait!
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226 else
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227 Delay(1);
0
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228 }
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229 D(bug("SYSTimer: EXITING RunTimer loop..."));
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230 return(0);
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231 }
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232
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233 /* This is only called if the event thread is not running */
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234 int SDL_SYS_TimerInit(void)
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235 {
255
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236 D(bug("Creating thread for the timer (NOITIMER)...\n"));
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237
0
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238 timer_alive = 1;
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239 timer_thread = SDL_CreateThread(RunTimer, NULL);
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240 if ( timer_thread == NULL )
0
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241 {
21
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242 D(bug("Creazione del thread fallita...\n"));
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243
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244 return(-1);
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245 }
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246 return(SDL_SetTimerThreaded(1));
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247 }
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248
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249 void SDL_SYS_TimerQuit(void)
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250 {
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251 timer_alive = 0;
21
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252 if ( timer_thread ) {
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253 SDL_WaitThread(timer_thread, NULL);
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254 timer_thread = NULL;
0
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255 }
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256 }
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257
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258 int SDL_SYS_StartTimer(void)
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259 {
21
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260 SDL_SetError("Internal logic error: AmigaOS uses threaded timer");
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261 return(-1);
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262 }
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263
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264 void SDL_SYS_StopTimer(void)
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265 {
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266 return;
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267 }