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annotate src/thread/pth/SDL_systhread.c @ 3300:34a4a01da79c

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Possibly fixed bug #601, definitely fixed a potential issue with threads stopping and starting in rapid succession.
author Sam Lantinga <slouken@libsdl.org>
date Wed, 23 Sep 2009 06:37:27 +0000
parents 99210400e8b9
children 0d1b16ee0bca
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 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 /*
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25 * GNU pth threads
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26 *
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27 * Patrice Mandin
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28 */
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29
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30 #include <pth.h>
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31 #include <signal.h>
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32
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33 #include "SDL_thread.h"
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34 #include "../SDL_thread_c.h"
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35 #include "../SDL_systhread.h"
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36
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37 /* List of signals to mask in the subthreads */
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38 static int sig_list[] = {
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39 SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGALRM, SIGTERM, SIGCHLD, SIGWINCH,
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40 SIGVTALRM, SIGPROF, 0
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41 };
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42
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43 static void *
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44 RunThread(void *data)
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45 {
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46 SDL_RunThread(data);
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47 pth_exit((void *) 0);
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48 return ((void *) 0); /* Prevent compiler warning */
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49 }
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50
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51 int
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52 SDL_SYS_CreateThread(SDL_Thread * thread, void *args)
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53 {
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54 pth_attr_t type;
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55
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56 /* Create a new attribute */
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57 type = pth_attr_new();
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58 if (type == NULL) {
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59 SDL_SetError("Couldn't initialize pth attributes");
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60 return (-1);
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61 }
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62 pth_attr_set(type, PTH_ATTR_JOINABLE, TRUE);
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63
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64 /* Create the thread and go! */
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65 thread->handle = pth_spawn(type, RunThread, args);
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66 if (thread->handle == NULL) {
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67 SDL_SetError("Not enough resources to create thread");
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68 return (-1);
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69 }
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70 return (0);
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71 }
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72
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73 void
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74 SDL_SYS_SetupThread(void)
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75 {
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76 int i;
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77 sigset_t mask;
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78 int oldstate;
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79
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80 /* Mask asynchronous signals for this thread */
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81 sigemptyset(&mask);
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82 for (i = 0; sig_list[i]; ++i) {
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83 sigaddset(&mask, sig_list[i]);
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84 }
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85 pth_sigmask(SIG_BLOCK, &mask, 0);
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86
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87 /* Allow ourselves to be asynchronously cancelled */
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88 pth_cancel_state(PTH_CANCEL_ASYNCHRONOUS, &oldstate);
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89 }
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90
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91 /* WARNING: This may not work for systems with 64-bit pid_t */
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92 Uint32
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93 SDL_ThreadID(void)
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94 {
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95 return ((Uint32) pth_self());
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96 }
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97
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98 void
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99 SDL_SYS_WaitThread(SDL_Thread * thread)
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100 {
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101 pth_join(thread->handle, NULL);
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102 }
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103
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104 /* vi: set ts=4 sw=4 expandtab: */