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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QTCONCURRENT_FUNCTIONWRAPPERS_H
#define QTCONCURRENT_FUNCTIONWRAPPERS_H
#include <QtCore/qglobal.h>
#ifndef QT_NO_CONCURRENT
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
QT_MODULE(Core)
#ifndef qdoc
namespace QtConcurrent {
template <typename T>
class FunctionWrapper0
{
public:
typedef T (*FunctionPointerType)();
typedef T result_type;
inline FunctionWrapper0(FunctionPointerType _functionPointer)
:functionPointer(_functionPointer) { }
inline T operator()()
{
return functionPointer();
}
private:
FunctionPointerType functionPointer;
};
template <typename T, typename U>
class FunctionWrapper1
{
public:
typedef T (*FunctionPointerType)(U u);
typedef T result_type;
inline FunctionWrapper1(FunctionPointerType _functionPointer)
:functionPointer(_functionPointer) { }
inline T operator()(U u)
{
return functionPointer(u);
}
private:
FunctionPointerType functionPointer;
};
template <typename T, typename U, typename V>
class FunctionWrapper2
{
public:
typedef T (*FunctionPointerType)(U u, V v);
typedef T result_type;
inline FunctionWrapper2(FunctionPointerType _functionPointer)
:functionPointer(_functionPointer) { }
inline T operator()(U u, V v)
{
return functionPointer(u, v);
}
private:
FunctionPointerType functionPointer;
};
template <typename T, typename C>
class MemberFunctionWrapper
{
public:
typedef T (C::*FunctionPointerType)();
typedef T result_type;
inline MemberFunctionWrapper(FunctionPointerType _functionPointer)
:functionPointer(_functionPointer) { }
inline T operator()(C &c)
{
return (c.*functionPointer)();
}
private:
FunctionPointerType functionPointer;
};
template <typename T, typename C, typename U>
class MemberFunctionWrapper1
{
public:
typedef T (C::*FunctionPointerType)(U);
typedef T result_type;
inline MemberFunctionWrapper1(FunctionPointerType _functionPointer)
: functionPointer(_functionPointer)
{ }
inline T operator()(C &c, U u)
{
return (c.*functionPointer)(u);
}
private:
FunctionPointerType functionPointer;
};
template <typename T, typename C>
class ConstMemberFunctionWrapper
{
public:
typedef T (C::*FunctionPointerType)() const;
typedef T result_type;
inline ConstMemberFunctionWrapper(FunctionPointerType _functionPointer)
:functionPointer(_functionPointer) { }
inline T operator()(const C &c) const
{
return (c.*functionPointer)();
}
private:
FunctionPointerType functionPointer;
};
} // namespace QtConcurrent.
namespace QtPrivate {
template <typename T>
const T& createFunctionWrapper(const T& t)
{
return t;
}
template <typename T, typename U>
QtConcurrent::FunctionWrapper1<T, U> createFunctionWrapper(T (*func)(U))
{
return QtConcurrent::FunctionWrapper1<T, U>(func);
}
template <typename T, typename C>
QtConcurrent::MemberFunctionWrapper<T, C> createFunctionWrapper(T (C::*func)())
{
return QtConcurrent::MemberFunctionWrapper<T, C>(func);
}
template <typename T, typename C, typename U>
QtConcurrent::MemberFunctionWrapper1<T, C, U> createFunctionWrapper(T (C::*func)(U))
{
return QtConcurrent::MemberFunctionWrapper1<T, C, U>(func);
}
template <typename T, typename C>
QtConcurrent::ConstMemberFunctionWrapper<T, C> createFunctionWrapper(T (C::*func)() const)
{
return QtConcurrent::ConstMemberFunctionWrapper<T, C>(func);
}
template<typename T>
void *lazyResultType_helper(int, typename T::result_type * = 0);
template<typename T>
char lazyResultType_helper(double);
template <typename Functor, bool foo = sizeof(lazyResultType_helper<Functor>(0)) != sizeof(void*)>
struct LazyResultType { typedef typename Functor::result_type Type; };
template <typename Functor>
struct LazyResultType<Functor, true> { typedef void Type; };
template <class T>
struct ReduceResultType;
template <class U, class V>
struct ReduceResultType<void(*)(U&,V)>
{
typedef U ResultType;
};
template <class T, class C, class U>
struct ReduceResultType<T(C::*)(U)>
{
typedef C ResultType;
};
template <class InputSequence, class MapFunctor>
struct MapResultType
{
typedef typename LazyResultType<MapFunctor>::Type ResultType;
};
template <class U, class V>
struct MapResultType<void, U (*)(V)>
{
typedef U ResultType;
};
template <class T, class C>
struct MapResultType<void, T(C::*)() const>
{
typedef T ResultType;
};
#ifndef QT_NO_TEMPLATE_TEMPLATE_PARAMETERS
template <template <typename> class InputSequence, typename MapFunctor, typename T>
struct MapResultType<InputSequence<T>, MapFunctor>
{
typedef InputSequence<typename LazyResultType<MapFunctor>::Type> ResultType;
};
template <template <typename> class InputSequence, class T, class U, class V>
struct MapResultType<InputSequence<T>, U (*)(V)>
{
typedef InputSequence<U> ResultType;
};
template <template <typename> class InputSequence, class T, class U, class C>
struct MapResultType<InputSequence<T>, U(C::*)() const>
{
typedef InputSequence<U> ResultType;
};
#endif // QT_NO_TEMPLATE_TEMPLATE_PARAMETER
template <class MapFunctor>
struct MapResultType<QStringList, MapFunctor>
{
typedef QList<typename LazyResultType<MapFunctor>::Type> ResultType;
};
template <class U, class V>
struct MapResultType<QStringList, U (*)(V)>
{
typedef QList<U> ResultType;
};
template <class U, class C>
struct MapResultType<QStringList, U(C::*)() const>
{
typedef QList<U> ResultType;
};
} // namespace QtPrivate.
#endif //qdoc
QT_END_NAMESPACE
QT_END_HEADER
#endif // QT_NO_CONCURRENT
#endif
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