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annotate src/thread/riscos/SDL_systhread.c @ 1554:0ca607a5d173

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Fixed bug #84 Date: Sun, 23 Oct 2005 16:39:03 +0200 From: "A. Schmid" <sahib@phreaker.net> Subject: [SDL] no software surfaces with svgalib driver? Hi, I noticed that the SDL (1.2.9) svgalib driver only makes use of linear addressable (framebuffer) video modes. On older systems (like one of mine), linear addressable modes are often not available. Especially for cards with VESA VBE < 2.0 the svgalib vesa driver is unusable, since VESA only supports framebuffering for VBE 2.0 and later. The changes necessary to add support for software surfaces seem to be relatively small. I only had to hack src/video/svga/SDL_svgavideo.c (see attached patch). The code worked fine for me, but it is no more than a proof of concept and should be reviewed (probably has a memory leak when switching modes). It also uses the vgagl library (included in the svgalib package) and needs to be linked against it. -Alex
author Sam Lantinga <slouken@libsdl.org>
date Sun, 19 Mar 2006 12:04:40 +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
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135 void SDL_SYS_KillThread(SDL_Thread *thread)
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136 {
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137 #ifdef PTHREAD_CANCEL_ASYNCHRONOUS
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138 pthread_cancel(thread->handle);
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139 #else
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140 pthread_kill(thread->handle, SIGKILL);
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141 #endif
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142 }
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143
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144 #endif