src/thread/pth/SDL_systhread.c
author Sam Lantinga <slouken@libsdl.org>
Wed, 17 May 2006 08:18:28 +0000
branchSDL-1.3
changeset 1659 14717b52abc0
parent 1402 d910939febfa
child 1662 782fd950bd46
child 1895 c121d94672cb
child 4159 a1b03ba2fcd0
permissions -rw-r--r--
Merge trunk-1.3-3
     1 /*
     2     SDL - Simple DirectMedia Layer
     3     Copyright (C) 1997-2006 Sam Lantinga
     4 
     5     This library is free software; you can redistribute it and/or
     6     modify it under the terms of the GNU Lesser General Public
     7     License as published by the Free Software Foundation; either
     8     version 2.1 of the License, or (at your option) any later version.
     9 
    10     This library is distributed in the hope that it will be useful,
    11     but WITHOUT ANY WARRANTY; without even the implied warranty of
    12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    13     Lesser General Public License for more details.
    14 
    15     You should have received a copy of the GNU Lesser General Public
    16     License along with this library; if not, write to the Free Software
    17     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
    18 
    19     Sam Lantinga
    20     slouken@libsdl.org
    21 */
    22 #include "SDL_config.h"
    23 
    24 /*
    25  *	GNU pth threads
    26  *
    27  *	Patrice Mandin
    28  */
    29 
    30 #include <pth.h>
    31 #include <signal.h>
    32 
    33 #include "SDL_thread.h"
    34 #include "../SDL_thread_c.h"
    35 #include "../SDL_systhread.h"
    36 
    37 /* List of signals to mask in the subthreads */
    38 static int sig_list[] = {
    39 	SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGALRM, SIGTERM, SIGCHLD, SIGWINCH,
    40 	SIGVTALRM, SIGPROF, 0
    41 };
    42 
    43 static void *RunThread(void *data)
    44 {
    45 	SDL_RunThread(data);
    46 	pth_exit((void*)0);
    47 	return((void *)0);		/* Prevent compiler warning */
    48 }
    49 
    50 int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
    51 {
    52 	pth_attr_t type;
    53 
    54 	/* Create a new attribute */
    55 	type = pth_attr_new();
    56 	if ( type == NULL ) {
    57 		SDL_SetError("Couldn't initialize pth attributes");
    58 		return(-1);
    59 	}
    60 	pth_attr_set(type, PTH_ATTR_JOINABLE, TRUE);
    61 
    62 	/* Create the thread and go! */
    63 	thread->handle = pth_spawn(type, RunThread, args);
    64 	if ( thread->handle == NULL ) {
    65 		SDL_SetError("Not enough resources to create thread");
    66 		return(-1);
    67 	}
    68 	return(0);
    69 }
    70 
    71 void SDL_SYS_SetupThread(void)
    72 {
    73 	int i;
    74 	sigset_t mask;
    75 	int oldstate;
    76 
    77 	/* Mask asynchronous signals for this thread */
    78 	sigemptyset(&mask);
    79 	for ( i=0; sig_list[i]; ++i ) {
    80 		sigaddset(&mask, sig_list[i]);
    81 	}
    82 	pth_sigmask(SIG_BLOCK, &mask, 0);
    83 
    84 	/* Allow ourselves to be asynchronously cancelled */
    85 	pth_cancel_state(PTH_CANCEL_ASYNCHRONOUS, &oldstate);
    86 }
    87 
    88 /* WARNING:  This may not work for systems with 64-bit pid_t */
    89 Uint32 SDL_ThreadID(void)
    90 {
    91 	return((Uint32)pth_self());
    92 }
    93 
    94 void SDL_SYS_WaitThread(SDL_Thread *thread)
    95 {
    96 	pth_join(thread->handle, NULL);
    97 }
    98 
    99 void SDL_SYS_KillThread(SDL_Thread *thread)
   100 {
   101 	pth_cancel(thread->handle);
   102 	pth_join(thread->handle, NULL);
   103 }