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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 "qdotnetmarshal.h"
#ifdef Q_OS_WINDOWS
# define QDOTNETFUNCTION_CALLTYPE __stdcall
#else
# define QDOTNETFUNCTION_CALLTYPE
#endif
template<typename T, typename... TArg>
class QDotNetFunction
{
public:
QDotNetFunction(void *funcPtr = nullptr)
: funcPtr(reinterpret_cast<Delegate>(funcPtr))
{}
QDotNetFunction(const QDotNetFunction &cpySrc)
: funcPtr(cpySrc.funcPtr)
{}
QDotNetFunction &operator=(const QDotNetFunction &cpySrc)
{
this->funcPtr = cpySrc.funcPtr;
return *this;
}
void *ptr() const { return reinterpret_cast<void *>(funcPtr); }
bool isValid() const { return funcPtr != nullptr; }
typename QDotNetInbound<T>::TargetType operator()(
typename QDotNetOutbound<TArg>::SourceType... arg) const
{
if (!isValid())
return QDotNetNull<T>::value();
return QDotNetInbound<T>::convert(funcPtr(QDotNetOutbound<TArg>::convert(arg)...));
}
typename QDotNetInbound<T>::TargetType invoke(const QDotNetRef &obj,
typename QDotNetOutbound<TArg>::SourceType... arg) const
{
return operator()(arg...);
}
typename QDotNetInbound<T>::TargetType invoke(nullptr_t nullObj,
typename QDotNetOutbound<TArg>::SourceType... arg) const
{
return operator()(arg...);
}
private:
using Delegate = typename QDotNetInbound<T>::InboundType(QDOTNETFUNCTION_CALLTYPE *)(
typename QDotNetOutbound<TArg>::OutboundType...);
Delegate funcPtr = nullptr;
};
template<typename... TArg>
class QDotNetFunction<void, TArg...>
{
public:
QDotNetFunction(void *funcPtr = nullptr)
: funcPtr(reinterpret_cast<Delegate>(funcPtr))
{}
void *ptr() const { return reinterpret_cast<void *>(funcPtr); }
bool isValid() const { return funcPtr != nullptr; }
void operator()(typename QDotNetOutbound<TArg>::SourceType... arg) const
{
if (isValid())
funcPtr(QDotNetOutbound<TArg>::convert(arg)...);
}
void invoke(const QDotNetRef &obj, typename QDotNetOutbound<TArg>::SourceType... arg) const
{
operator()(arg...);
}
void invoke(nullptr_t nullObj, typename QDotNetOutbound<TArg>::SourceType... arg) const
{
operator()(arg...);
}
private:
using Delegate = void(QDOTNETFUNCTION_CALLTYPE *)(
typename QDotNetOutbound<TArg>::OutboundType...);
Delegate funcPtr = nullptr;
};
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