/** \file IEventHandler.h
 **	\date  2005-12-07
 **	\author grymse@alhem.net
**/
/*
Copyright (C) 2005,2007  Anders Hedstrom

This library is made available under the terms of the GNU GPL.

If you would like to use this library in a closed-source application,
a separate license agreement is available. For information about 
the closed-source license agreement for the C++ sockets library,
please visit http://www.alhem.net/Sockets/license.html and/or
email license@alhem.net.

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

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.
*/
#ifndef _SOCKETS_IEventHandler_H
#define _SOCKETS_IEventHandler_H

#include "sockets-config.h"
#ifdef SOCKETS_NAMESPACE
namespace SOCKETS_NAMESPACE {
#endif


class IEventOwner;

/** Timer event handler pure virtual base class.
	\ingroup timer */
class IEventHandler
{
public:
	virtual ~IEventHandler() {}

	/** Return time left until next event.
		\param tv Time struct that will be filled by method
		\return true if time is set for next event */
	virtual bool GetTimeUntilNextEvent(struct timeval *) = 0;
	/** Will fire events whose time has come. */
	virtual void CheckEvents() = 0;
	/** Schedule and event for an owner.
		\param from Event owner
		\param sec Seconds until event
		\param usec Microseconds until event */
	virtual long AddEvent(IEventOwner *,long sec,long usec) = 0;
	/** Clear all events for a specific owner. */
	virtual void ClearEvents(IEventOwner *) = 0;
	/** Remove one specific event for an event owner. */
	virtual void RemoveEvent(IEventOwner *,long) = 0;

};




#ifdef SOCKETS_NAMESPACE
}
#endif

#endif // _SOCKETS_IEventHandler_H
