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/***************************************************************************************************
Copyright (C) 2023 The Qt Company Ltd.
SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
***************************************************************************************************/
#pragma once
#include "qdotnetfunction.h"
#ifdef __GNUC__
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wconversion"
#endif
#include <QMap>
#ifdef __GNUC__
# pragma GCC diagnostic pop
#endif
#include <functional>
class QDotNetCallbackBase
{
protected:
QDotNetCallbackBase() = default;
public:
virtual ~QDotNetCallbackBase() = default;
};
template<typename TResult, typename... TArg>
class QDotNetCallback : public QDotNetCallbackBase
{
public:
using ReturnType = typename QDotNetInbound<TResult>::TargetType;
using FunctionType = std::function<ReturnType(
typename QDotNetInbound<TArg>::TargetType... arg)>;
using OutboundType = typename QDotNetOutbound<TResult>::OutboundType;
using Delegate = OutboundType(QDOTNETFUNCTION_CALLTYPE *)(
QDotNetCallback *callback, quint64 key, typename QDotNetInbound<TArg>::InboundType...);
using CleanUp = void(QDOTNETFUNCTION_CALLTYPE *)(QDotNetCallback *callback, quint64 key);
QDotNetCallback(FunctionType function)
: function(function)
{}
~QDotNetCallback() override = default;
static Delegate delegate()
{
return callbackDelegate;
}
static CleanUp cleanUp()
{
return callbackCleanUp;
}
private:
struct Box
{
ReturnType returnValue;
};
QMap<quint64, Box *> boxes;
static OutboundType QDOTNETFUNCTION_CALLTYPE callbackDelegate(
QDotNetCallback *callback, quint64 key, typename QDotNetInbound<TArg>::InboundType... arg)
{
Box *box = callback->boxes[key] = new Box
{
callback->function(QDotNetInbound<TArg>::convert(arg)...)
};
const auto result = QDotNetOutbound<TResult>::convert(box->returnValue);
return result;
}
static void QDOTNETFUNCTION_CALLTYPE callbackCleanUp(QDotNetCallback *callback, quint64 key)
{
if (const Box *box = callback->boxes.take(key))
delete box;
}
FunctionType function = nullptr;
};
template<typename... TArg>
class QDotNetCallback<void, TArg...> : public QDotNetCallbackBase
{
public:
using FunctionType = std::function<void(typename QDotNetOutbound<TArg>::SourceType... arg)>;
QDotNetCallback(FunctionType function)
: function(function)
{}
~QDotNetCallback() override = default;
using Delegate = void(QDOTNETFUNCTION_CALLTYPE *)(
QDotNetCallback *callback, quint64 key, typename QDotNetInbound<TArg>::InboundType...);
static Delegate delegate()
{
return callbackDelegate;
}
using CleanUp = void(QDOTNETFUNCTION_CALLTYPE *)(QDotNetCallback *callback, quint64 key);
static CleanUp cleanUp()
{
return callbackCleanUp;
}
private:
static void QDOTNETFUNCTION_CALLTYPE callbackDelegate(QDotNetCallback *callback, quint64 key,
typename QDotNetInbound<TArg>::InboundType... arg)
{
callback->function(QDotNetInbound<TArg>::convert(arg)...);
}
static void QDOTNETFUNCTION_CALLTYPE callbackCleanUp(QDotNetCallback *callback, quint64 key)
{}
FunctionType function = nullptr;
};
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