geventloop.h

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//
// Copyright (C) 2001-2013 Graeme Walker <graeme_walker@users.sourceforge.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 3 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, see <http://www.gnu.org/licenses/>.
// ===

#ifndef G_EVENT_LOOP_H
#define G_EVENT_LOOP_H

#include "gdef.h"
#include "gnet.h"
#include "geventhandler.h"
#include "gexception.h"
#include "gdatetime.h"
#include "gdescriptor.h"
#include <list>
#include <string>

namespace GNet
{
        class EventLoop ;
}

class GNet::EventLoop 
{
public:
        G_EXCEPTION( NoInstance , "no event loop instance" ) ;

protected:
        EventLoop() ;

public:
        static EventLoop * create() ;

        static EventLoop & instance() ;

        static bool exists() ;

        virtual ~EventLoop() ;

        virtual bool init() = 0 ;

        virtual std::string run() = 0 ;

        virtual bool running() const = 0 ;

        virtual void quit( std::string reason ) = 0 ;

        virtual void addRead( Descriptor fd , EventHandler & handler ) = 0 ;

        virtual void addWrite( Descriptor fd , EventHandler & handler ) = 0 ;

        virtual void addException( Descriptor fd , EventHandler & handler ) = 0 ;

        virtual void dropRead( Descriptor fd ) = 0 ;

        virtual void dropWrite( Descriptor fd ) = 0 ;

        virtual void dropException( Descriptor fd ) = 0 ;

        virtual void setTimeout( G::DateTime::EpochTime t , bool & empty_implementation_hint ) = 0 ;

private:
        static EventLoop * m_this ;
} ;

#endif