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annotate src/timer/amigaos/SDL_systimer.c @ 1614:6162b8d921ce

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Date: Wed, 29 Mar 2006 17:26:55 +0200 CEST From: "Fran���is Revol" Subject: [SDL] BeOS port fix: PrintScreen key crashing It seems the latest SDL crashes when someone hits the PrtScrn key in ZETA (BeOS R6), somewhere it gets a negative value as key code (or a big unsigned maybe ?), and uses it as an index in the keysym table... I'll investigate the cause for the negative value, but it's always better to check for bounds correctly when indexing a table. The attached diff fixes it. Fran���is Revol -- Software Architect yellowTAB GmbH
author Sam Lantinga <slouken@libsdl.org>
date Fri, 31 Mar 2006 06:16:20 +0000
parents d910939febfa
children 92947e3a18db
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 #include <stdio.h>
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25 #include <time.h>
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26 #include <signal.h>
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27 #include <unistd.h>
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28 #include <string.h>
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29 #include <errno.h>
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30 #include <exec/types.h>
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31 #ifdef __SASC
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32 #include <proto/dos.h>
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33 #include <clib/graphics_protos.h>
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34 #include <pragmas/graphics.h>
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35 #include <clib/exec_protos.h>
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36 #include <pragmas/exec.h>
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37 #elif defined(STORMC4_WOS)
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38 #include <proto/dos.h>
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39 #include <proto/exec.h>
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40 #include <proto/graphics.h>
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41 #else
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42 #include <inline/dos.h>
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43 #include <inline/exec.h>
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44 #include <inline/graphics.h>
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45 #endif
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46 #include "mydebug.h"
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47
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48 extern struct DosLibrary *DOSBase;
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49 extern struct ExecBase *SysBase;
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50 static struct GfxBase *GfxBase;
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51
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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 /* The first ticks value of the application */
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56
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57 #if !defined(__PPC__) || defined(STORMC4_WOS) || defined(MORPHOS)
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58 static clock_t start;
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59
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60 void SDL_StartTicks(void)
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61 {
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62 /* Set first ticks value */
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63 start=clock();
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64 }
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65
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66 Uint32 SDL_GetTicks (void)
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67 {
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68 clock_t ticks;
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69
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70 ticks=clock()-start;
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71
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72 #ifdef __SASC
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73 // CLOCKS_PER_SEC == 1000 !
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74
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75 return(ticks);
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76 #else
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77 // CLOCKS_PER_SEC != 1000 !
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78
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79 return ticks*(1000/CLOCKS_PER_SEC);
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80 #endif
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81 }
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82
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83 void SDL_Delay (Uint32 ms)
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84 {
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85 // Do a busy wait if time is less than 50ms
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86
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87 if(ms<50)
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88 {
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89 clock_t to_wait=clock();
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90
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91 #ifndef __SASC
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92 ms*=(CLOCKS_PER_SEC/1000);
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93 #endif
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94 to_wait+=ms;
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95
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96 while(clock()<to_wait);
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97 }
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98 else
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99 {
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100 Delay(ms/20);
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101 }
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102 }
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103
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104 #else
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105
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106 ULONG MY_CLOCKS_PER_SEC;
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107
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108 void PPC_TimerInit(void);
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109 APTR MyTimer;
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110
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111 ULONG start[2];
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112
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113 void SDL_StartTicks(void)
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114 {
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115 /* Set first ticks value */
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116 if(!MyTimer)
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117 PPC_TimerInit();
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118
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119 PPCGetTimerObject(MyTimer,PPCTIMERTAG_CURRENTTICKS,start);
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120 start[1]>>=10;
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121 start[1]|=((result[0]&0x3ff)<<22);
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122 start[0]>>=10;
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123 }
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124
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125 Uint32 SDL_GetTicks (void)
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126 {
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127 ULONG result[2];
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128 PPCGetTimerObject(MyTimer,PPCTIMERTAG_CURRENTTICKS,result);
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129
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130 // PPCAsr64p(result,10);
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131 // Non va, la emulo:
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132
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133 result[1]>>=10;
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134 result[1]|=((result[0]&0x3ff)<<22);
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135
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136 // Non mi interessa piu' result[0]
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137
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138 return result[1]*1000/MY_CLOCKS_PER_SEC;
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139 }
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140
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141 void SDL_Delay (Uint32 ms)
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142 {
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143 // Do a busy wait if time is less than 50ms
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144
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145 if(ms<50)
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146 {
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147 ULONG to_wait[2],actual[2];
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148 PPCGetTimerObject(MyTimer,PPCTIMERTAG_CURRENTTICKS,result);
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149 actual[1]=0;
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150 to_wait[1]+=ms*1000/MY_CLOCKS_PER_SEC;
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151
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152 while(actual[1]<to_wait[1])
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153 {
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154 PPCGetTimerObject(MyTimer,PPCTIMERTAG_CURRENTTICKS,actual);
0
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155 }
21
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156 }
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157 else
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158 {
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159 Delay(ms/50);
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160 }
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161 }
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162
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163 void PPC_TimerInit(void)
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164 {
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165 struct TagItem tags[]=
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166 {
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167 PPCTIMERTAG_CPU,TRUE,
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168 TAG_DONE,0
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169 };
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170
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171
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172 if(MyTimer=PPCCreateTimerObject(tags))
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173 {
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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 }
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195 else
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196 {
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197 D(bug("Errore nell'inizializzazione del timer!\n"));
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198 }
21
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199 }
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200
0
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201 #endif
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202
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203 #include "SDL_thread.h"
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204
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205 /* Data to handle a single periodic alarm */
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206 static int timer_alive = 0;
21
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207 static SDL_Thread *timer_thread = NULL;
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208
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209 static int RunTimer(void *unused)
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210 {
21
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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
0
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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 }
21
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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);
0
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224 }
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225 D(bug("SYSTimer: EXITING RunTimer loop..."));
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226 return(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 SDL_SYS_TimerInit(void)
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231 {
255
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232 D(bug("Creating thread for the timer (NOITIMER)...\n"));
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233
0
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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 {
21
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238 D(bug("Creazione del thread fallita...\n"));
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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));
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243 }
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244
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245 void 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;
0
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251 }
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252 }
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253
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254 int SDL_SYS_StartTimer(void)
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255 {
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256 SDL_SetError("Internal logic error: AmigaOS uses threaded timer");
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257 return(-1);
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258 }
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259
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260 void SDL_SYS_StopTimer(void)
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261 {
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262 return;
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263 }