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/* PCSX2 - PS2 Emulator for PCs
* Copyright (C) 2002-2010 PCSX2 Dev Team
*
* PCSX2 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 Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* PCSX2 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 PCSX2.
* If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <list>
#include "Threading.h"
// --------------------------------------------------------------------------------------
// EventSource< template EvtType >
// --------------------------------------------------------------------------------------
template< typename ListenerType >
class EventSource
{
public:
typedef typename ListenerType::EvtParams EvtParams;
typedef typename std::list< ListenerType* > ListenerList;
typedef typename ListenerList::iterator ListenerIterator;
protected:
typedef typename ListenerList::const_iterator ConstIterator;
ListenerList m_listeners;
// This is a cached copy of the listener list used to handle standard dispatching, which
// allows for self-modification of the EventSource's listener list by the listeners.
// Translation: The dispatcher uses this copy instead, to avoid iterator invalidation.
ListenerList m_cache_copy;
bool m_cache_valid;
Threading::Mutex m_listeners_lock;
public:
EventSource()
{
m_cache_valid = false;
}
virtual ~EventSource() throw() {}
virtual ListenerIterator Add( ListenerType& listener );
virtual void Remove( ListenerType& listener );
virtual void Remove( const ListenerIterator& listenerHandle );
void Add( ListenerType* listener )
{
if( listener == NULL ) return;
Add( *listener );
}
void Remove( ListenerType* listener )
{
if( listener == NULL ) return;
Remove( *listener );
}
void Dispatch( const EvtParams& params );
protected:
virtual ListenerIterator _AddFast_without_lock( ListenerType& listener );
virtual void _DispatchRaw( ListenerIterator iter, const ListenerIterator& iend, const EvtParams& params );
};
// --------------------------------------------------------------------------------------
// IEventDispatcher
// --------------------------------------------------------------------------------------
// This class is used as a base interface for EventListeners. It allows the listeners to do
// customized dispatching of several event types into "user friendly" function overrides.
//
template< typename EvtParams >
class IEventDispatcher
{
protected:
IEventDispatcher() {}
public:
virtual ~IEventDispatcher() throw() {}
virtual void DispatchEvent( const EvtParams& params )=0;
};
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