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annotate src/thread/pthread/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 1e8582152d44
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 #include <pthread.h>
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25 #include <signal.h>
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26
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27 #include "SDL_thread.h"
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28 #include "../SDL_thread_c.h"
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29 #include "../SDL_systhread.h"
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30
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31 /* List of signals to mask in the subthreads */
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32 static int sig_list[] = {
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33 SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGALRM, SIGTERM, SIGCHLD, SIGWINCH,
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34 SIGVTALRM, SIGPROF, 0
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35 };
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36
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37 #ifdef __RISCOS__
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38 /* RISC OS needs to know the main thread for
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39 * it's timer and event processing. */
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40 int riscos_using_threads = 0;
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41 Uint32 riscos_main_thread = 0; /* Thread running events */
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42 #endif
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43
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44
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45 static void *RunThread(void *data)
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46 {
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47 SDL_RunThread(data);
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48 pthread_exit((void*)0);
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49 return((void *)0); /* Prevent compiler warning */
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50 }
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51
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52 int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
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53 {
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54 pthread_attr_t type;
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55
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56 /* Set the thread attributes */
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57 if ( pthread_attr_init(&type) != 0 ) {
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58 SDL_SetError("Couldn't initialize pthread attributes");
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59 return(-1);
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60 }
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61 pthread_attr_setdetachstate(&type, PTHREAD_CREATE_JOINABLE);
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62
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63 /* Create the thread and go! */
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64 if ( pthread_create(&thread->handle, &type, RunThread, args) != 0 ) {
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65 SDL_SetError("Not enough resources to create thread");
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66 return(-1);
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67 }
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68
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69 #ifdef __RISCOS__
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70 if (riscos_using_threads == 0) {
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71 riscos_using_threads = 1;
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72 riscos_main_thread = SDL_ThreadID();
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73 }
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74 #endif
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75
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76 return(0);
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77 }
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78
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79 void SDL_SYS_SetupThread(void)
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80 {
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81 int i;
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82 sigset_t mask;
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83
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84 /* Mask asynchronous signals for this thread */
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85 sigemptyset(&mask);
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86 for ( i=0; sig_list[i]; ++i ) {
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87 sigaddset(&mask, sig_list[i]);
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88 }
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89 pthread_sigmask(SIG_BLOCK, &mask, 0);
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90
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91 #ifdef PTHREAD_CANCEL_ASYNCHRONOUS
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92 /* Allow ourselves to be asynchronously cancelled */
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93 { int oldstate;
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94 pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &oldstate);
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95 }
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96 #endif
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97 }
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98
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99 /* WARNING: This may not work for systems with 64-bit pid_t */
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100 Uint32 SDL_ThreadID(void)
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101 {
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102 return((Uint32)pthread_self());
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103 }
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104
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105 void SDL_SYS_WaitThread(SDL_Thread *thread)
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106 {
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107 pthread_join(thread->handle, 0);
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108 }
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109
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110 void SDL_SYS_KillThread(SDL_Thread *thread)
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111 {
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112 #ifdef PTHREAD_CANCEL_ASYNCHRONOUS
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113 pthread_cancel(thread->handle);
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114 #else
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115 #ifdef __FREEBSD__
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116 #warning For some reason, this doesnt actually kill a thread - FreeBSD 3.2
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117 #endif
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118 pthread_kill(thread->handle, SIGKILL);
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119 #endif
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120 }