annotate src/thread/riscos/SDL_systhread.c @ 2247:93994f65c74c

Removed hermes since it's LGPL and not compatible with a commercial license. Prepping for using MMX and SSE intrinsics instead of inline assembly. .. except for memcpy equivalents which only get faster if they can exploit the parallelism of loading into multiple SIMD registers. :)
author Sam Lantinga <slouken@libsdl.org>
date Wed, 15 Aug 2007 08:21:10 +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: */