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annotate src/thread/riscos/SDL_systhread.c @ 2234:cf8c3b0117b3

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Gained 5 FPS in testsprite because Mac OS X memset is highly optimized
author Sam Lantinga <slouken@libsdl.org>
date Sun, 12 Aug 2007 18:27:44 +0000
parents c121d94672cb
children 4436464c4f51
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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18
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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 /* RISC OS version based on pthreads linux source */
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25
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26 #include "SDL_thread.h"
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27 #include "../SDL_systhread.h"
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28
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29 #if SDL_THREADS_DISABLED
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30
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31 int
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32 SDL_SYS_CreateThread(SDL_Thread * thread, void *args)
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33 {
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34 SDL_SetError
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35 ("Threads have not been compiled into this version of the library");
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36 return (-1);
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37 }
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38
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39 void
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40 SDL_SYS_SetupThread(void)
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41 {
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42 return;
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43 }
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44
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45 Uint32
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46 SDL_ThreadID(void)
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47 {
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48 return (0);
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49 }
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50
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51 void
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52 SDL_SYS_WaitThread(SDL_Thread * thread)
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53 {
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54 return;
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55 }
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56
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57 void
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58 SDL_SYS_KillThread(SDL_Thread * thread)
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59 {
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60 return;
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61 }
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62
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63 #else
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64
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65 #include <signal.h>
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66
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67 /* List of signals to mask in the subthreads */
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68 static int sig_list[] = {
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69 SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGALRM, SIGTERM, SIGCHLD, SIGWINCH,
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70 SIGVTALRM, SIGPROF, 0
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71 };
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72
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73 #include <pthread.h>
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74
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75 int riscos_using_threads = 0;
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76 Uint32 riscos_main_thread = 0; /* Thread running events */
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77
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78 static void *
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79 RunThread(void *data)
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80 {
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81 SDL_RunThread(data);
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82 pthread_exit((void *) 0);
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83 return ((void *) 0); /* Prevent compiler warning */
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84 }
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85
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86 int
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87 SDL_SYS_CreateThread(SDL_Thread * thread, void *args)
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88 {
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89 pthread_attr_t type;
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90
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91 /* Set the thread attributes */
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92 if (pthread_attr_init(&type) != 0) {
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93 SDL_SetError("Couldn't initialize pthread attributes");
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94 return (-1);
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95 }
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96 pthread_attr_setdetachstate(&type, PTHREAD_CREATE_JOINABLE);
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97
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98 /* Create the thread and go! */
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99 if (pthread_create(&thread->handle, &type, RunThread, args) != 0) {
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100 SDL_SetError("Not enough resources to create thread");
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101 return (-1);
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102 }
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103
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104 if (riscos_using_threads == 0) {
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105 riscos_using_threads = 1;
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106 riscos_main_thread = SDL_ThreadID();
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107 }
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108
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109 return (0);
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110 }
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111
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112 void
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113 SDL_SYS_SetupThread(void)
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114 {
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115 int i;
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116 sigset_t mask;
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117
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118 /* Mask asynchronous signals for this thread */
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119 sigemptyset(&mask);
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120 for (i = 0; sig_list[i]; ++i) {
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121 sigaddset(&mask, sig_list[i]);
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122 }
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123 pthread_sigmask(SIG_BLOCK, &mask, 0);
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124
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125 #ifdef PTHREAD_CANCEL_ASYNCHRONOUS
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126 /* Allow ourselves to be asynchronously cancelled */
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127 {
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128 int oldstate;
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129 pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &oldstate);
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130 }
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131 #endif
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132 }
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133
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134 Uint32
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135 SDL_ThreadID(void)
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136 {
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137 return ((Uint32) pthread_self());
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138 }
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139
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140 void
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141 SDL_SYS_WaitThread(SDL_Thread * thread)
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142 {
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143 pthread_join(thread->handle, 0);
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144 }
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145
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146 void
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147 SDL_SYS_KillThread(SDL_Thread * thread)
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148 {
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149 #ifdef PTHREAD_CANCEL_ASYNCHRONOUS
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150 pthread_cancel(thread->handle);
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151 #else
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152 pthread_kill(thread->handle, SIGKILL);
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153 #endif
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154 }
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155
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156 #endif
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157 /* vi: set ts=4 sw=4 expandtab: */