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annotate src/timer/amigaos/SDL_systimer.c @ 1662:782fd950bd46 SDL-1.3

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Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. WARNING: None of the video drivers have been updated for the new API yet! The API is still under design and very fluid. The code is now run through a consistent indent format: indent -i4 -nut -nsc -br -ce The headers are being converted to automatically generate doxygen documentation.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 28 May 2006 13:04:16 +0000
parents 92947e3a18db
children 4da1ee79c9af
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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
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63 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
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70 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
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88 SDL_Delay (Uint32 ms)
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89 {
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90 // Do a busy wait if time is less than 50ms
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91
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92 if (ms < 50) {
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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 } else {
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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
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116 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
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129 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:
255
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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
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146 SDL_Delay (Uint32 ms)
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147 {
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148 // Do a busy wait if time is less than 50ms
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149
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150 if (ms < 50) {
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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 PPCGetTimerObject (MyTimer, PPCTIMERTAG_CURRENTTICKS, actual);
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158 }
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159 } else {
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160 Delay (ms / 50);
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161 }
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162 }
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163
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164 void
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165 PPC_TimerInit (void)
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166 {
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167 struct TagItem tags[] = {
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168 PPCTIMERTAG_CPU, TRUE,
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169 TAG_DONE, 0
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170 };
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171
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172
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173 if (MyTimer = PPCCreateTimerObject (tags)) {
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174 ULONG result[2];
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175
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176 PPCGetTimerObject (MyTimer, PPCTIMERTAG_TICKSPERSEC, result);
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177 D (bug
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178 ("Timer inizializzato, TPS: %lu - %lu\n", result[0], result[1]));
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179 // PPCAsr64p(result,10);
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180 result[1] >>= 10;
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181 result[1] |= ((result[0] & 0x3ff) << 22);
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182 result[0] >>= 10;
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183
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184 D (bug ("Shiftato TPS: %lu - %lu\n", result[0], result[1]));
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185 MY_CLOCKS_PER_SEC = result[1];
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186
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187 PPCGetTimerObject (MyTimer, PPCTIMERTAG_CURRENTTICKS, result);
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188
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189 D (bug ("Current ticks: %lu - %lu\n", result[0], result[1]));
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190 result[1] >>= 10;
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191 result[1] |= ((result[0] & 0x3ff) << 22);
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192 result[0] >>= 10;
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193 // PPCAsr64p(result,10);
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194 D (bug ("Shiftato: %lu - %lu\n", result[0], result[1]));
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195 } else {
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196 D (bug ("Errore nell'inizializzazione del timer!\n"));
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197 }
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198 }
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199
0
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200 #endif
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201
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202 #include "SDL_thread.h"
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203
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204 /* Data to handle a single periodic alarm */
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205 static int timer_alive = 0;
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206 static SDL_Thread *timer_thread = NULL;
0
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207
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208 static int
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209 RunTimer (void *unused)
0
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210 {
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211 D (bug ("SYSTimer: Entering RunTimer loop..."));
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212
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213 if (GfxBase == NULL)
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214 GfxBase = (struct GfxBase *) OpenLibrary ("graphics.library", 37);
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215
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216 while (timer_alive) {
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217 if (SDL_timer_running) {
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218 SDL_ThreadedTimerCheck ();
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219 }
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220 if (GfxBase)
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221 WaitTOF (); // Check the timer every fifth of seconds. Was SDL_Delay(1)->BusyWait!
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222 else
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223 Delay (1);
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224 }
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225 D (bug ("SYSTimer: EXITING RunTimer loop..."));
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226 return (0);
0
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227 }
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228
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229 /* This is only called if the event thread is not running */
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230 int
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231 SDL_SYS_TimerInit (void)
0
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232 {
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233 D (bug ("Creating thread for the timer (NOITIMER)...\n"));
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234
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235 timer_alive = 1;
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236 timer_thread = SDL_CreateThread (RunTimer, NULL);
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237 if (timer_thread == NULL) {
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238 D (bug ("Creazione del thread fallita...\n"));
0
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239
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240 return (-1);
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241 }
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242 return (SDL_SetTimerThreaded (1));
0
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243 }
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244
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245 void
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246 SDL_SYS_TimerQuit (void)
0
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247 {
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248 timer_alive = 0;
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249 if (timer_thread) {
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250 SDL_WaitThread (timer_thread, NULL);
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251 timer_thread = NULL;
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252 }
0
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253 }
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254
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255 int
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256 SDL_SYS_StartTimer (void)
0
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257 {
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258 SDL_SetError ("Internal logic error: AmigaOS uses threaded timer");
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259 return (-1);
0
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260 }
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261
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262 void
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263 SDL_SYS_StopTimer (void)
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264 {
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265 return;
0
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266 }
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267
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268 #endif /* SDL_TIMER_AMIGA */
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269 /* vi: set ts=4 sw=4 expandtab: */