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annotate src/timer/amigaos/SDL_systimer.c @ 1358:c71e05b4dc2e

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More header massaging... works great on Windows. ;-)
author Sam Lantinga <slouken@libsdl.org>
date Fri, 10 Feb 2006 06:48:43 +0000
parents c9b51268668f
children 19418e4422cb
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_timer.h"
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52 #include "SDL_timer_c.h"
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53
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54 #if defined(DISABLE_THREADS) || defined(FORK_HACK)
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55 #define USE_ITIMER
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56 #endif
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57
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58 /* The first ticks value of the application */
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59
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60 #if !defined(__PPC__) || defined(STORMC4_WOS) || defined(MORPHOS)
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61 static clock_t start;
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62
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63 void SDL_StartTicks(void)
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64 {
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65 /* Set first ticks value */
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66 start=clock();
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67 }
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68
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69 Uint32 SDL_GetTicks (void)
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70 {
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71 clock_t ticks;
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72
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73 ticks=clock()-start;
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74
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75 #ifdef __SASC
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76 // CLOCKS_PER_SEC == 1000 !
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77
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78 return(ticks);
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79 #else
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80 // CLOCKS_PER_SEC != 1000 !
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81
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82 return ticks*(1000/CLOCKS_PER_SEC);
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83 #endif
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84 }
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85
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86 void SDL_Delay (Uint32 ms)
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87 {
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88 // Do a busy wait if time is less than 50ms
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89
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90 if(ms<50)
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91 {
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92 clock_t to_wait=clock();
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93
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94 #ifndef __SASC
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95 ms*=(CLOCKS_PER_SEC/1000);
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96 #endif
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97 to_wait+=ms;
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98
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99 while(clock()<to_wait);
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100 }
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101 else
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102 {
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103 Delay(ms/20);
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104 }
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105 }
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106
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107 #else
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108
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109 ULONG MY_CLOCKS_PER_SEC;
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110
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111 void PPC_TimerInit(void);
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112 APTR MyTimer;
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113
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114 ULONG start[2];
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115
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116 void SDL_StartTicks(void)
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117 {
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118 /* Set first ticks value */
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119 if(!MyTimer)
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120 PPC_TimerInit();
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121
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122 PPCGetTimerObject(MyTimer,PPCTIMERTAG_CURRENTTICKS,start);
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123 start[1]>>=10;
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124 start[1]|=((result[0]&0x3ff)<<22);
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125 start[0]>>=10;
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126 }
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127
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128 Uint32 SDL_GetTicks (void)
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129 {
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130 ULONG result[2];
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131 PPCGetTimerObject(MyTimer,PPCTIMERTAG_CURRENTTICKS,result);
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132
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133 // PPCAsr64p(result,10);
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134 // Non va, la emulo:
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135
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136 result[1]>>=10;
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137 result[1]|=((result[0]&0x3ff)<<22);
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138
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139 // Non mi interessa piu' result[0]
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140
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141 return result[1]*1000/MY_CLOCKS_PER_SEC;
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142 }
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143
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144 void SDL_Delay (Uint32 ms)
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145 {
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146 // Do a busy wait if time is less than 50ms
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147
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148 if(ms<50)
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149 {
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150 ULONG to_wait[2],actual[2];
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151 PPCGetTimerObject(MyTimer,PPCTIMERTAG_CURRENTTICKS,result);
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152 actual[1]=0;
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153 to_wait[1]+=ms*1000/MY_CLOCKS_PER_SEC;
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154
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155 while(actual[1]<to_wait[1])
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156 {
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157 PPCGetTimerObject(MyTimer,PPCTIMERTAG_CURRENTTICKS,actual);
0
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158 }
21
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159 }
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160 else
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161 {
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162 Delay(ms/50);
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163 }
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164 }
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165
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166 void PPC_TimerInit(void)
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167 {
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168 struct TagItem tags[]=
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169 {
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170 PPCTIMERTAG_CPU,TRUE,
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171 TAG_DONE,0
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172 };
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173
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174
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175 if(MyTimer=PPCCreateTimerObject(tags))
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176 {
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177 ULONG result[2];
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178
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179 PPCGetTimerObject(MyTimer,PPCTIMERTAG_TICKSPERSEC,result);
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180 D(bug("Timer inizializzato, TPS: %lu - %lu\n",result[0],result[1]));
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181 // PPCAsr64p(result,10);
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182 result[1]>>=10;
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183 result[1]|=((result[0]&0x3ff)<<22);
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184 result[0]>>=10;
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185
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186 D(bug("Shiftato TPS: %lu - %lu\n",result[0],result[1]));
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187 MY_CLOCKS_PER_SEC=result[1];
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188
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189 PPCGetTimerObject(MyTimer,PPCTIMERTAG_CURRENTTICKS,result);
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190
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191 D(bug("Current ticks: %lu - %lu\n",result[0],result[1]));
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192 result[1]>>=10;
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193 result[1]|=((result[0]&0x3ff)<<22);
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194 result[0]>>=10;
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195 // PPCAsr64p(result,10);
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196 D(bug("Shiftato: %lu - %lu\n",result[0],result[1]));
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197 }
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198 else
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199 {
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200 D(bug("Errore nell'inizializzazione del timer!\n"));
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201 }
21
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202 }
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203
0
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204 #endif
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205
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206 #include "SDL_thread.h"
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207
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208 /* Data to handle a single periodic alarm */
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209 static int timer_alive = 0;
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210 static SDL_Thread *timer_thread = NULL;
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211
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212 static int RunTimer(void *unused)
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213 {
21
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214 D(bug("SYSTimer: Entering RunTimer loop..."));
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215
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216 if(GfxBase==NULL)
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217 GfxBase=(struct GfxBase *)OpenLibrary("graphics.library",37);
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218
0
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219 while ( timer_alive ) {
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220 if ( SDL_timer_running ) {
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221 SDL_ThreadedTimerCheck();
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222 }
21
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223 if(GfxBase)
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224 WaitTOF(); // Check the timer every fifth of seconds. Was SDL_Delay(1)->BusyWait!
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225 else
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226 Delay(1);
0
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227 }
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228 D(bug("SYSTimer: EXITING RunTimer loop..."));
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229 return(0);
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230 }
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231
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232 /* This is only called if the event thread is not running */
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233 int SDL_SYS_TimerInit(void)
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234 {
255
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235 D(bug("Creating thread for the timer (NOITIMER)...\n"));
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236
0
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237 timer_alive = 1;
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238 timer_thread = SDL_CreateThread(RunTimer, NULL);
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239 if ( timer_thread == NULL )
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240 {
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241 D(bug("Creazione del thread fallita...\n"));
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242
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243 return(-1);
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244 }
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245 return(SDL_SetTimerThreaded(1));
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246 }
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247
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248 void SDL_SYS_TimerQuit(void)
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249 {
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250 timer_alive = 0;
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251 if ( timer_thread ) {
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252 SDL_WaitThread(timer_thread, NULL);
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253 timer_thread = NULL;
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254 }
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255 }
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256
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257 int SDL_SYS_StartTimer(void)
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258 {
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259 SDL_SetError("Internal logic error: AmigaOS uses threaded timer");
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260 return(-1);
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261 }
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262
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263 void SDL_SYS_StopTimer(void)
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264 {
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265 return;
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266 }