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annotate src/thread/riscos/SDL_systhread.c @ 1026:0f3aa6ab3341

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author Sam Lantinga <slouken@libsdl.org>
date Wed, 12 Jan 2005 06:04:48 +0000
parents d74fbf56f2f6
children c9b51268668f
rev   line source
955
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Sam Lantinga <slouken@libsdl.org>
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2004 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 Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 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
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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13 Library 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 Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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
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23 /* RISC OS version based on pthreads linux source */
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24
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25 #ifdef SAVE_RCSID
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26 static char rcsid =
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27 "@(#) $Id$";
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28 #endif
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29
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30 #include "SDL_error.h"
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31 #include "SDL_thread.h"
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32 #include "SDL_systhread.h"
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33
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34 #ifdef DISABLE_THREADS
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35
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36 int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
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37 {
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38 SDL_SetError("Threads have not been compiled into this version of the library");
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39 return(-1);
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40 }
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41
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42 void SDL_SYS_SetupThread(void)
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43 {
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44 return;
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45 }
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46
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47 Uint32 SDL_ThreadID(void)
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48 {
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49 return(0);
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50 }
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51
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52 void 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 SDL_SYS_KillThread(SDL_Thread *thread)
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58 {
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59 return;
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60 }
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61
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62 #else
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63
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64 #include <signal.h>
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65
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66 /* List of signals to mask in the subthreads */
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67 static int sig_list[] = {
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68 SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGALRM, SIGTERM, SIGCHLD, SIGWINCH,
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69 SIGVTALRM, SIGPROF, 0
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70 };
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71
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72 #include <pthread.h>
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73
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74 int riscos_using_threads = 0;
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75 Uint32 riscos_main_thread = 0; /* Thread running events */
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76
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77 static void *RunThread(void *data)
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78 {
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79 SDL_RunThread(data);
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80 pthread_exit((void*)0);
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81 return((void *)0); /* Prevent compiler warning */
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82 }
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83
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84 int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
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85 {
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86 pthread_attr_t type;
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87
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88 /* Set the thread attributes */
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89 if ( pthread_attr_init(&type) != 0 ) {
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90 SDL_SetError("Couldn't initialize pthread attributes");
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91 return(-1);
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92 }
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93 pthread_attr_setdetachstate(&type, PTHREAD_CREATE_JOINABLE);
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94
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95 /* Create the thread and go! */
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96 if ( pthread_create(&thread->handle, &type, RunThread, args) != 0 ) {
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97 SDL_SetError("Not enough resources to create thread");
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98 return(-1);
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99 }
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100
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101 if (riscos_using_threads == 0)
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102 {
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103 riscos_using_threads = 1;
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104 riscos_main_thread = SDL_ThreadID();
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105 }
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106
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107 return(0);
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108 }
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109
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110 void SDL_SYS_SetupThread(void)
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111 {
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112 int i;
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113 sigset_t mask;
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114
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115 /* Mask asynchronous signals for this thread */
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116 sigemptyset(&mask);
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117 for ( i=0; sig_list[i]; ++i ) {
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118 sigaddset(&mask, sig_list[i]);
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119 }
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120 pthread_sigmask(SIG_BLOCK, &mask, 0);
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121
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122 #ifdef PTHREAD_CANCEL_ASYNCHRONOUS
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123 /* Allow ourselves to be asynchronously cancelled */
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124 { int oldstate;
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125 pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &oldstate);
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126 }
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127 #endif
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128 }
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129
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130 Uint32 SDL_ThreadID(void)
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131 {
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132 return((Uint32)pthread_self());
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133 }
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134
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135 void SDL_SYS_WaitThread(SDL_Thread *thread)
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136 {
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137 pthread_join(thread->handle, 0);
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138 }
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139
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140 void SDL_SYS_KillThread(SDL_Thread *thread)
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141 {
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142 #ifdef PTHREAD_CANCEL_ASYNCHRONOUS
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143 pthread_cancel(thread->handle);
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144 #else
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145 pthread_kill(thread->handle, SIGKILL);
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146 #endif
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147 }
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148
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149 #endif