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annotate src/timer/amigaos/SDL_systimer.c @ 1701:442248d4e738 SDL-1.3

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Merged DirectSound dropout fix from SDL 1.2
author Sam Lantinga <slouken@libsdl.org>
date Fri, 23 Jun 2006 08:48:24 +0000
parents 4da1ee79c9af
children
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
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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:
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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("Timer inizializzato, TPS: %lu - %lu\n", result[0], result[1]));
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178 // PPCAsr64p(result,10);
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179 result[1] >>= 10;
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180 result[1] |= ((result[0] & 0x3ff) << 22);
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181 result[0] >>= 10;
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182
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183 D(bug("Shiftato TPS: %lu - %lu\n", result[0], result[1]));
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184 MY_CLOCKS_PER_SEC = result[1];
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185
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186 PPCGetTimerObject(MyTimer, PPCTIMERTAG_CURRENTTICKS, result);
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187
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188 D(bug("Current ticks: %lu - %lu\n", result[0], result[1]));
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189 result[1] >>= 10;
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190 result[1] |= ((result[0] & 0x3ff) << 22);
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191 result[0] >>= 10;
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192 // PPCAsr64p(result,10);
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193 D(bug("Shiftato: %lu - %lu\n", result[0], result[1]));
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194 } else {
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195 D(bug("Errore nell'inizializzazione del timer!\n"));
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196 }
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197 }
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198
0
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199 #endif
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200
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201 #include "SDL_thread.h"
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202
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203 /* Data to handle a single periodic alarm */
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204 static int timer_alive = 0;
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205 static SDL_Thread *timer_thread = NULL;
0
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206
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207 static int
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208 RunTimer(void *unused)
0
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209 {
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210 D(bug("SYSTimer: Entering RunTimer loop..."));
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211
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212 if (GfxBase == NULL)
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213 GfxBase = (struct GfxBase *) OpenLibrary("graphics.library", 37);
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214
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215 while (timer_alive) {
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216 if (SDL_timer_running) {
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217 SDL_ThreadedTimerCheck();
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218 }
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219 if (GfxBase)
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220 WaitTOF(); // Check the timer every fifth of seconds. Was SDL_Delay(1)->BusyWait!
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221 else
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222 Delay(1);
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223 }
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224 D(bug("SYSTimer: EXITING RunTimer loop..."));
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225 return (0);
0
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226 }
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227
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228 /* This is only called if the event thread is not running */
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229 int
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230 SDL_SYS_TimerInit(void)
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231 {
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232 D(bug("Creating thread for the timer (NOITIMER)...\n"));
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233
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234 timer_alive = 1;
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235 timer_thread = SDL_CreateThread(RunTimer, NULL);
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236 if (timer_thread == NULL) {
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237 D(bug("Creazione del thread fallita...\n"));
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238
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239 return (-1);
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240 }
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241 return (SDL_SetTimerThreaded(1));
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242 }
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243
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244 void
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245 SDL_SYS_TimerQuit(void)
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246 {
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247 timer_alive = 0;
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248 if (timer_thread) {
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249 SDL_WaitThread(timer_thread, NULL);
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250 timer_thread = NULL;
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251 }
0
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252 }
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253
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254 int
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255 SDL_SYS_StartTimer(void)
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256 {
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257 SDL_SetError("Internal logic error: AmigaOS uses threaded timer");
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258 return (-1);
0
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259 }
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260
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261 void
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262 SDL_SYS_StopTimer(void)
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263 {
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264 return;
0
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265 }
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92947e3a18db Make sure code is only compiled if the appropriate subsystem is enabled
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
266
92947e3a18db Make sure code is only compiled if the appropriate subsystem is enabled
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
267 #endif /* SDL_TIMER_AMIGA */
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1635
diff changeset
268 /* vi: set ts=4 sw=4 expandtab: */