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/*
* Copyright (C) 2005-2018 Team Kodi
* This file is part of Kodi - https://kodi.tv
*
* SPDX-License-Identifier: GPL-2.0-or-later
* See LICENSES/README.md for more information.
*/
#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() = default;
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 RetardedAsyncCallbackHandler : public CallbackHandler
{
protected:
inline RetardedAsyncCallbackHandler() = default;
public:
~RetardedAsyncCallbackHandler() override;
void invokeCallback(Callback* cb) override;
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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