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annotate src/timer/amigaos/SDL_systimer.c @ 1650:ee4f2d77206f

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author Sam Lantinga <slouken@libsdl.org>
date Sat, 22 Apr 2006 19:50:23 +0000
parents 92947e3a18db
children 782fd950bd46 c121d94672cb
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 #include "SDL_config.h"
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23
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24 #ifdef SDL_TIMER_AMIGA
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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 <signal.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 #include <exec/types.h>
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33 #ifdef __SASC
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34 #include <proto/dos.h>
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35 #include <clib/graphics_protos.h>
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36 #include <pragmas/graphics.h>
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37 #include <clib/exec_protos.h>
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38 #include <pragmas/exec.h>
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39 #elif defined(STORMC4_WOS)
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40 #include <proto/dos.h>
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41 #include <proto/exec.h>
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42 #include <proto/graphics.h>
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43 #else
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44 #include <inline/dos.h>
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45 #include <inline/exec.h>
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46 #include <inline/graphics.h>
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47 #endif
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48 #include "mydebug.h"
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49
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50 extern struct DosLibrary *DOSBase;
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51 extern struct ExecBase *SysBase;
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52 static struct GfxBase *GfxBase;
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53
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54 #include "SDL_timer.h"
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55 #include "../SDL_timer_c.h"
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56
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57 /* The first ticks value of the application */
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58
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59 #if !defined(__PPC__) || defined(STORMC4_WOS) || defined(MORPHOS)
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60 static clock_t start;
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61
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62 void SDL_StartTicks(void)
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63 {
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64 /* Set first ticks value */
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65 start=clock();
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66 }
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67
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68 Uint32 SDL_GetTicks (void)
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69 {
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70 clock_t ticks;
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71
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72 ticks=clock()-start;
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73
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74 #ifdef __SASC
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75 // CLOCKS_PER_SEC == 1000 !
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76
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77 return(ticks);
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78 #else
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79 // CLOCKS_PER_SEC != 1000 !
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80
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81 return ticks*(1000/CLOCKS_PER_SEC);
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82 #endif
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83 }
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84
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85 void SDL_Delay (Uint32 ms)
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86 {
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87 // Do a busy wait if time is less than 50ms
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88
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89 if(ms<50)
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90 {
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91 clock_t to_wait=clock();
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92
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93 #ifndef __SASC
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94 ms*=(CLOCKS_PER_SEC/1000);
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95 #endif
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96 to_wait+=ms;
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97
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98 while(clock()<to_wait);
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99 }
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100 else
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101 {
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102 Delay(ms/20);
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103 }
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104 }
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105
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106 #else
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107
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108 ULONG MY_CLOCKS_PER_SEC;
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109
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110 void PPC_TimerInit(void);
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111 APTR MyTimer;
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112
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113 ULONG start[2];
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114
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115 void SDL_StartTicks(void)
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116 {
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117 /* Set first ticks value */
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118 if(!MyTimer)
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119 PPC_TimerInit();
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120
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121 PPCGetTimerObject(MyTimer,PPCTIMERTAG_CURRENTTICKS,start);
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122 start[1]>>=10;
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123 start[1]|=((result[0]&0x3ff)<<22);
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124 start[0]>>=10;
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125 }
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126
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127 Uint32 SDL_GetTicks (void)
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128 {
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129 ULONG result[2];
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130 PPCGetTimerObject(MyTimer,PPCTIMERTAG_CURRENTTICKS,result);
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131
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132 // PPCAsr64p(result,10);
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133 // Non va, la emulo:
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134
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135 result[1]>>=10;
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136 result[1]|=((result[0]&0x3ff)<<22);
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137
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138 // Non mi interessa piu' result[0]
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139
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140 return result[1]*1000/MY_CLOCKS_PER_SEC;
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141 }
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142
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143 void SDL_Delay (Uint32 ms)
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144 {
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145 // Do a busy wait if time is less than 50ms
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146
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147 if(ms<50)
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148 {
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149 ULONG to_wait[2],actual[2];
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150 PPCGetTimerObject(MyTimer,PPCTIMERTAG_CURRENTTICKS,result);
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151 actual[1]=0;
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152 to_wait[1]+=ms*1000/MY_CLOCKS_PER_SEC;
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153
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154 while(actual[1]<to_wait[1])
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155 {
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156 PPCGetTimerObject(MyTimer,PPCTIMERTAG_CURRENTTICKS,actual);
0
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157 }
21
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158 }
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159 else
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160 {
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161 Delay(ms/50);
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162 }
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163 }
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164
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165 void PPC_TimerInit(void)
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166 {
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167 struct TagItem tags[]=
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168 {
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169 PPCTIMERTAG_CPU,TRUE,
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170 TAG_DONE,0
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171 };
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172
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173
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174 if(MyTimer=PPCCreateTimerObject(tags))
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175 {
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176 ULONG result[2];
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177
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178 PPCGetTimerObject(MyTimer,PPCTIMERTAG_TICKSPERSEC,result);
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179 D(bug("Timer inizializzato, TPS: %lu - %lu\n",result[0],result[1]));
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180 // PPCAsr64p(result,10);
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181 result[1]>>=10;
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182 result[1]|=((result[0]&0x3ff)<<22);
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183 result[0]>>=10;
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184
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185 D(bug("Shiftato TPS: %lu - %lu\n",result[0],result[1]));
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186 MY_CLOCKS_PER_SEC=result[1];
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187
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188 PPCGetTimerObject(MyTimer,PPCTIMERTAG_CURRENTTICKS,result);
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189
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190 D(bug("Current ticks: %lu - %lu\n",result[0],result[1]));
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191 result[1]>>=10;
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192 result[1]|=((result[0]&0x3ff)<<22);
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193 result[0]>>=10;
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194 // PPCAsr64p(result,10);
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195 D(bug("Shiftato: %lu - %lu\n",result[0],result[1]));
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196 }
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197 else
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198 {
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199 D(bug("Errore nell'inizializzazione del timer!\n"));
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200 }
21
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201 }
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202
0
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203 #endif
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204
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205 #include "SDL_thread.h"
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206
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207 /* Data to handle a single periodic alarm */
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208 static int timer_alive = 0;
21
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209 static SDL_Thread *timer_thread = NULL;
0
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210
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211 static int RunTimer(void *unused)
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212 {
21
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213 D(bug("SYSTimer: Entering RunTimer loop..."));
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214
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215 if(GfxBase==NULL)
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216 GfxBase=(struct GfxBase *)OpenLibrary("graphics.library",37);
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217
0
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218 while ( timer_alive ) {
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219 if ( SDL_timer_running ) {
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220 SDL_ThreadedTimerCheck();
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221 }
21
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222 if(GfxBase)
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223 WaitTOF(); // Check the timer every fifth of seconds. Was SDL_Delay(1)->BusyWait!
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224 else
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225 Delay(1);
0
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226 }
21
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227 D(bug("SYSTimer: EXITING RunTimer loop..."));
0
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228 return(0);
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229 }
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230
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231 /* This is only called if the event thread is not running */
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232 int SDL_SYS_TimerInit(void)
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233 {
255
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234 D(bug("Creating thread for the timer (NOITIMER)...\n"));
21
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235
0
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236 timer_alive = 1;
21
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237 timer_thread = SDL_CreateThread(RunTimer, NULL);
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238 if ( timer_thread == NULL )
0
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239 {
21
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240 D(bug("Creazione del thread fallita...\n"));
0
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241
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242 return(-1);
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243 }
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244 return(SDL_SetTimerThreaded(1));
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245 }
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246
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247 void SDL_SYS_TimerQuit(void)
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248 {
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249 timer_alive = 0;
21
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250 if ( timer_thread ) {
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diff changeset
251 SDL_WaitThread(timer_thread, NULL);
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252 timer_thread = NULL;
0
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253 }
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254 }
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255
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256 int SDL_SYS_StartTimer(void)
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257 {
21
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258 SDL_SetError("Internal logic error: AmigaOS uses threaded timer");
0
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259 return(-1);
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260 }
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261
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262 void SDL_SYS_StopTimer(void)
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263 {
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264 return;
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265 }
1635
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266
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267 #endif /* SDL_TIMER_AMIGA */