/*

    SDL - Simple DirectMedia Layer

    Copyright (C) 1997-2006 Sam Lantinga

    This library is free software; you can redistribute it and/or

    modify it under the terms of the GNU Lesser General Public

    License as published by the Free Software Foundation; either

    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,

    but WITHOUT ANY WARRANTY; without even the implied warranty of

    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public

    License along with this library; if not, write to the Free Software

    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga

    slouken@libsdl.org

*/

#include "SDL_config.h"

/*

 *	GNU pth threads

 *

 *	Patrice Mandin

 */

#include <pth.h>

#include <signal.h>

#include "SDL_thread.h"

#include "../SDL_thread_c.h"

#include "../SDL_systhread.h"

/* List of signals to mask in the subthreads */

static int sig_list[] = {

	SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGALRM, SIGTERM, SIGCHLD, SIGWINCH,

	SIGVTALRM, SIGPROF, 0

};

static void *RunThread(void *data)

{

	SDL_RunThread(data);

	pth_exit((void*)0);

	return((void *)0);		/* Prevent compiler warning */

}

int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)

{

	pth_attr_t type;

	/* Create a new attribute */

	type = pth_attr_new();

	if ( type == NULL ) {

		SDL_SetError("Couldn't initialize pth attributes");

		return(-1);

	}

	pth_attr_set(type, PTH_ATTR_JOINABLE, TRUE);

	/* Create the thread and go! */

	thread->handle = pth_spawn(type, RunThread, args);

	if ( thread->handle == NULL ) {

		SDL_SetError("Not enough resources to create thread");

		return(-1);

	}

	return(0);

}

void SDL_SYS_SetupThread(void)

{

	int i;

	sigset_t mask;

	int oldstate;

	/* Mask asynchronous signals for this thread */

	sigemptyset(&mask);

	for ( i=0; sig_list[i]; ++i ) {

		sigaddset(&mask, sig_list[i]);

	}

	pth_sigmask(SIG_BLOCK, &mask, 0);

	/* Allow ourselves to be asynchronously cancelled */

	pth_cancel_state(PTH_CANCEL_ASYNCHRONOUS, &oldstate);

}

/* WARNING:  This may not work for systems with 64-bit pid_t */

Uint32 SDL_ThreadID(void)

{

	return((Uint32)pth_self());

}

void SDL_SYS_WaitThread(SDL_Thread *thread)

{

	pth_join(thread->handle, NULL);

}

void SDL_SYS_KillThread(SDL_Thread *thread)

{

	pth_cancel(thread->handle);

	pth_join(thread->handle, NULL);

}