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annotate src/thread/riscos/SDL_systhread.c @ 4109:cd2ab40f1219 SDL-1.2

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Made the mprotect() fix for SDL_SoftStretch() more general for hardened linux, etc.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 29 Dec 2007 05:18:33 +0000
parents d910939febfa
children 782fd950bd46 c121d94672cb a1b03ba2fcd0
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 SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
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32 {
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33 SDL_SetError("Threads have not been compiled into this version of the library");
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34 return(-1);
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35 }
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36
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37 void SDL_SYS_SetupThread(void)
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38 {
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39 return;
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40 }
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41
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42 Uint32 SDL_ThreadID(void)
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43 {
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44 return(0);
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45 }
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46
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47 void SDL_SYS_WaitThread(SDL_Thread *thread)
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48 {
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49 return;
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50 }
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51
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52 void SDL_SYS_KillThread(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 #else
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58
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59 #include <signal.h>
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60
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61 /* List of signals to mask in the subthreads */
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62 static int sig_list[] = {
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63 SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGALRM, SIGTERM, SIGCHLD, SIGWINCH,
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64 SIGVTALRM, SIGPROF, 0
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65 };
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66
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67 #include <pthread.h>
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68
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69 int riscos_using_threads = 0;
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70 Uint32 riscos_main_thread = 0; /* Thread running events */
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71
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72 static void *RunThread(void *data)
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73 {
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74 SDL_RunThread(data);
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75 pthread_exit((void*)0);
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76 return((void *)0); /* Prevent compiler warning */
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77 }
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78
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79 int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
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80 {
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81 pthread_attr_t type;
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82
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83 /* Set the thread attributes */
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84 if ( pthread_attr_init(&type) != 0 ) {
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85 SDL_SetError("Couldn't initialize pthread attributes");
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86 return(-1);
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87 }
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88 pthread_attr_setdetachstate(&type, PTHREAD_CREATE_JOINABLE);
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89
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90 /* Create the thread and go! */
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91 if ( pthread_create(&thread->handle, &type, RunThread, args) != 0 ) {
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92 SDL_SetError("Not enough resources to create thread");
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93 return(-1);
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94 }
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95
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96 if (riscos_using_threads == 0)
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97 {
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98 riscos_using_threads = 1;
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99 riscos_main_thread = SDL_ThreadID();
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100 }
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101
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102 return(0);
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103 }
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104
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105 void SDL_SYS_SetupThread(void)
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106 {
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107 int i;
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108 sigset_t mask;
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109
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110 /* Mask asynchronous signals for this thread */
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111 sigemptyset(&mask);
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112 for ( i=0; sig_list[i]; ++i ) {
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113 sigaddset(&mask, sig_list[i]);
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114 }
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115 pthread_sigmask(SIG_BLOCK, &mask, 0);
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116
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117 #ifdef PTHREAD_CANCEL_ASYNCHRONOUS
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118 /* Allow ourselves to be asynchronously cancelled */
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119 { int oldstate;
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120 pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &oldstate);
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121 }
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122 #endif
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123 }
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124
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125 Uint32 SDL_ThreadID(void)
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126 {
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127 return((Uint32)pthread_self());
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128 }
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129
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130 void SDL_SYS_WaitThread(SDL_Thread *thread)
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131 {
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132 pthread_join(thread->handle, 0);
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133 }
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134
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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135 void SDL_SYS_KillThread(SDL_Thread *thread)
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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136 {
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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137 #ifdef PTHREAD_CANCEL_ASYNCHRONOUS
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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138 pthread_cancel(thread->handle);
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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139 #else
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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140 pthread_kill(thread->handle, SIGKILL);
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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141 #endif
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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142 }
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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143
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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144 #endif