src/thread/pth/SDL_systhread.c
author Sam Lantinga <slouken@libsdl.org>
Thu, 16 Feb 2006 10:11:48 +0000
changeset 1361 19418e4422cb
parent 1358 c71e05b4dc2e
child 1402 d910939febfa
permissions -rw-r--r--
New configure-based build system. Still work in progress, but much improved
     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 
    23 /*
    24  *	GNU pth threads
    25  *
    26  *	Patrice Mandin
    27  */
    28 
    29 #include "SDL_thread.h"
    30 #include "../SDL_systhread.h"
    31 
    32 #include <pth.h>
    33 #include <signal.h>
    34 
    35 /* List of signals to mask in the subthreads */
    36 static int sig_list[] = {
    37 	SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGALRM, SIGTERM, SIGCHLD, SIGWINCH,
    38 	SIGVTALRM, SIGPROF, 0
    39 };
    40 
    41 static void *RunThread(void *data)
    42 {
    43 	SDL_RunThread(data);
    44 	pth_exit((void*)0);
    45 	return((void *)0);		/* Prevent compiler warning */
    46 }
    47 
    48 int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
    49 {
    50 	pth_attr_t type;
    51 
    52 	/* Create a new attribute */
    53 	type = pth_attr_new();
    54 	if ( type == NULL ) {
    55 		SDL_SetError("Couldn't initialize pth attributes");
    56 		return(-1);
    57 	}
    58 	pth_attr_set(type, PTH_ATTR_JOINABLE, TRUE);
    59 
    60 	/* Create the thread and go! */
    61 	thread->handle = pth_spawn(type, RunThread, args);
    62 	if ( thread->handle == NULL ) {
    63 		SDL_SetError("Not enough resources to create thread");
    64 		return(-1);
    65 	}
    66 	return(0);
    67 }
    68 
    69 void SDL_SYS_SetupThread(void)
    70 {
    71 	int i;
    72 	sigset_t mask;
    73 	int oldstate;
    74 
    75 	/* Mask asynchronous signals for this thread */
    76 	sigemptyset(&mask);
    77 	for ( i=0; sig_list[i]; ++i ) {
    78 		sigaddset(&mask, sig_list[i]);
    79 	}
    80 	pth_sigmask(SIG_BLOCK, &mask, 0);
    81 
    82 	/* Allow ourselves to be asynchronously cancelled */
    83 	pth_cancel_state(PTH_CANCEL_ASYNCHRONOUS, &oldstate);
    84 }
    85 
    86 /* WARNING:  This may not work for systems with 64-bit pid_t */
    87 Uint32 SDL_ThreadID(void)
    88 {
    89 	return((Uint32)pth_self());
    90 }
    91 
    92 void SDL_SYS_WaitThread(SDL_Thread *thread)
    93 {
    94 	pth_join(thread->handle, NULL);
    95 }
    96 
    97 void SDL_SYS_KillThread(SDL_Thread *thread)
    98 {
    99 	pth_cancel(thread->handle);
   100 	pth_join(thread->handle, NULL);
   101 }