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annotate src/thread/riscos/SDL_systhread.c @ 1295:c3e36ac8a94c

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Date: Sun, 6 Mar 2005 17:06:20 +0100 From: Per Inge Mathisen Subject: [SDL] Fullscreen refresh on win32 Windows has a terrible default for fullscreen 3D apps of 60mhz refresh rate. This can be fixed by the user by going into his driver's control panel and forcing the refresh rate higher. However, this not a very user friendly way about it, and in any case SDL contains no code that could figure out this that condition has afflicted the user. So the question is, could SDL fix this for the user? It is possible under Windows to request a higher refresh rate. The danger is of course that if the user has an old monitor, and you request a too high refresh rate, the monitor could be damaged. However, I believe there might be a way around that: Check before switching what refresh rate the user's desktop runs in, and if our fullscreen dimensions are equal or less than those of the desktop, use the higher refresh rate of 60 and the desktop rate. Since most users run their desktops in the same or higher resolution something sane, this should fix this problem for most users. Thoughts? An alternative is to add an SDL_GL_GetAttribute(SDL_GL_REFRESH_RATE) option so that programs can bitch at their users at their own convenience. - Per
author Sam Lantinga <slouken@libsdl.org>
date Mon, 30 Jan 2006 06:56:10 +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
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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