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annotate src/thread/pth/SDL_systhread.c @ 322:fd93a09655e3

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The audio lock and unlock functions are now a part of the driver. The MacOS audio locking has been implemented, courtesy of Ryan Gordon
author Sam Lantinga <slouken@libsdl.org>
date Sat, 30 Mar 2002 19:48:56 +0000
parents af42e7c4c860
children 1d74ddc90cb2
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, 1998, 1999, 2000, 2001, 2002 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 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 /* Pth thread management routines for SDL */
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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 #include <signal.h>
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35 #include <pth.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 *RunThread(void *data)
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44 {
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45 SDL_RunThread(data);
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46 pth_exit((void*)0);
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47 return((void *)0); /* Prevent compiler warning */
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48 }
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49
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50 int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
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51 {
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52 pth_attr_t type;
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53
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54 type = pth_attr_new();
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55
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56 /* Set the thread attributes */
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57 if ( pth_attr_init(type) != 0 ) {
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58 SDL_SetError("Couldn't initialize pth attributes");
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59 return(-1);
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60 }
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61 pth_attr_set(type, PTH_ATTR_JOINABLE, TRUE);
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62
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63 /* Create the thread and go! */
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64 if ( pth_spawn(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 return(0);
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69 }
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70
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71 void SDL_SYS_SetupThread(void)
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72 {
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73 int i;
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74 sigset_t mask;
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75
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76 /* Mask asynchronous signals for this thread */
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77 sigemptyset(&mask);
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78 for ( i=0; sig_list[i]; ++i ) {
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79 sigaddset(&mask, sig_list[i]);
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80 }
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81 pth_sigmask(SIG_BLOCK, &mask, 0);
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82
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83 /* Allow ourselves to be asynchronously cancelled */
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84 { int oldstate;
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85 pth_cancel_state(PTH_CANCEL_ASYNCHRONOUS, &oldstate);
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86 }
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87 }
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88
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89 /* WARNING: This may not work for systems with 64-bit pid_t */
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90 Uint32 SDL_ThreadID(void)
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91 {
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92 return((Uint32)pth_self());
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93 }
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94
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95 void SDL_SYS_WaitThread(SDL_Thread *thread)
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96 {
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97 pth_join(thread->handle, 0);
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98 }
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99
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100 void SDL_SYS_KillThread(SDL_Thread *thread)
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101 {
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102 pth_cancel(thread->handle);
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103 pth_join(thread->handle, NULL);
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104 }