/* -*-	Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */

/*

 * Copyright (c) 2005 INRIA

 * All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation;

 *

 * This program 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 General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 *

 * Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>

 */

#ifndef SCHEDULER_H

#define SCHEDULER_H

#include <stdint.h>

#include "event-id.h"

namespace ns3 {

class EventImpl;

class Scheduler {

 public:

	struct EventKey {

		uint32_t m_uid;

	};

	class EventKeyCompare {

	public:

		bool operator () (struct EventKey a, struct EventKey b);

	};

	virtual ~Scheduler () = 0;

	virtual EventId insert (EventImpl *event, EventKey key) = 0;

	virtual bool is_empty (void) const = 0;

	virtual EventImpl *peek_next (void) const = 0;

	virtual EventKey peek_next_key (void) const = 0;

	virtual void remove_next (void) = 0;

	virtual EventImpl *remove (EventId id, EventKey *key) = 0;

	virtual bool is_valid (EventId id) = 0;

};

}; // namespace ns3

#endif /* SCHEDULER_H */