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/*
* Copyright (C) 2005-2013 Team XBMC
* http://xbmc.org
*
* 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, 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 XBMC; see the file COPYING. If not, see
* <http://www.gnu.org/licenses/>.
*
*/
#pragma once
#include "AddonClass.h"
#include "CallbackFunction.h"
namespace XBMCAddon
{
/**
* This is the abstraction representing different ways to handle
* the execution of callbacks. Different language bindings may
* have different requirements.
*/
class CallbackHandler : public AddonClass
{
protected:
inline CallbackHandler() {}
public:
virtual void invokeCallback(Callback* cb) = 0;
};
/**
* This class is primarily for Python support (hence the "Retarded"
* prefix). Python (et. al. Retarded languages) require that
* the context within which a callback executes is under the control
* of the language. Therefore, this handler is used to queue
* messages over to a language controlled thread for eventual
* execution.
*
* @todo Allow a cross thread synchronous execution.
* Fix the stupid means of calling the clearPendingCalls by passing
* userData which is specific to the handler/language type.
*/
class RetardedAsynchCallbackHandler : public CallbackHandler
{
protected:
inline RetardedAsynchCallbackHandler() {}
public:
virtual ~RetardedAsynchCallbackHandler();
virtual void invokeCallback(Callback* cb);
static void makePendingCalls();
static void clearPendingCalls(void* userData);
virtual bool isStateOk(AddonClass* obj) = 0;
virtual bool shouldRemoveCallback(AddonClass* obj, void* userData) = 0;
};
}
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