/*-----------------------------------------------------------------------------
 * thread.cpp 
 * Copyright (C) 2003, 2004, 2005  Akito Nozaki
 * 
 * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 */

#include <tanoshi/common_def.h>
#include <tanoshi/thread.h>
#include <tanoshi/thread_p.h>

NAMESPACE_TANOSHI
{
	ThreadPrivate::ThreadPrivate()
	{
		running = false;
		finished = true;
	}
	
	void *ThreadPrivate::start(void *arg)
	{
		Thread *td = reinterpret_cast<Thread *>(arg);
		ThreadPrivate *d = td->d;
		
		d->running = true;
		d->finished = false;
		td->run();
		pthread_exit(0);
	}
	
	Thread::Thread()
		: d(new ThreadPrivate)
	{		
	}
	
	Thread::~Thread()
	{
		if(d->running && !d->finished)
		{
			// thread is still running... this will cause a crash.
		}
		
		delete d;
	}

	bool Thread::isTerminated()
	{
		d->locker.readLock();
			bool t = (d->finished == true);
		d->locker.readWriteUnlock();

		return t;
	}

	bool Thread::isRunning()
	{
		d->locker.readLock();
			bool t = (d->running == true);
		d->locker.readWriteUnlock();

		return t;
	}

	void Thread::start()
	{
		d->locker.writeLock();
			pthread_attr_t attr;
			pthread_attr_init(&attr);
			pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
		
			// TODO the Atribute should probably be set... priority etc.
			pthread_create(&d->thread_id, &attr, ThreadPrivate::start, this);
		
			pthread_attr_destroy(&attr);

		d->locker.readWriteUnlock();
		started();
	}

	void Thread::terminate()
	{
		d->locker.writeLock();
			if(d->thread_id)
			{
				d->finished = true;
				int code=pthread_cancel(d->thread_id);
				if(!code)
					d->finished = true;
			}
		d->locker.readWriteUnlock();

		terminated();
	}

	unsigned int Thread::thisThreadId()
	{
		return (unsigned int)pthread_self();
	}
}