mirror of
https://develop.openfoam.com/Development/openfoam.git
synced 2025-11-28 03:28:01 +00:00
e3e0d7c8b9
- previously it was only possible to reset a pointer, but not to change a const-reference directly (needed a swap() to do this).
488 lines
9.3 KiB
C++
488 lines
9.3 KiB
C++
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | Copyright (C) 2018-2019 OpenCFD Ltd.
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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| Copyright (C) 2011-2017 OpenFOAM Foundation
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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OpenFOAM is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
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\*---------------------------------------------------------------------------*/
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#include "error.H"
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#include <typeinfo>
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// * * * * * * * * * * * * * Private Member Operators * * * * * * * * * * * //
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template<class T>
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inline void Foam::tmp<T>::operator++()
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{
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ptr_->operator++();
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if (ptr_->count() > 1)
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{
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FatalErrorInFunction
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<< "Attempt to create more than 2 tmp's referring to"
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" the same object of type " << typeName()
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<< abort(FatalError);
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}
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}
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// * * * * * * * * * * * * * Static Member Functions * * * * * * * * * * * * //
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template<class T>
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template<class... Args>
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inline Foam::tmp<T> Foam::tmp<T>::New(Args&&... args)
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{
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return tmp<T>(new T(std::forward<Args>(args)...));
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}
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template<class T>
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template<class U, class... Args>
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inline Foam::tmp<T> Foam::tmp<T>::NewFrom(Args&&... args)
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{
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return tmp<T>(new U(std::forward<Args>(args)...));
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}
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// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
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template<class T>
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inline constexpr Foam::tmp<T>::tmp() noexcept
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:
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ptr_(nullptr),
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type_(PTR)
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{}
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template<class T>
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inline constexpr Foam::tmp<T>::tmp(std::nullptr_t) noexcept
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:
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ptr_(nullptr),
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type_(PTR)
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{}
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template<class T>
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inline Foam::tmp<T>::tmp(T* p)
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:
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ptr_(p),
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type_(PTR)
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{
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if (p && !p->unique())
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{
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FatalErrorInFunction
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<< "Attempted construction of a " << typeName()
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<< " from non-unique pointer"
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<< abort(FatalError);
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}
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}
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template<class T>
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inline Foam::tmp<T>::tmp(const T& obj) noexcept
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:
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ptr_(const_cast<T*>(&obj)),
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type_(CREF)
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{}
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template<class T>
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inline Foam::tmp<T>::tmp(tmp<T>&& t) noexcept
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:
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ptr_(t.ptr_),
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type_(t.type_)
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{
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t.ptr_ = nullptr;
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t.type_ = PTR;
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}
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template<class T>
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inline Foam::tmp<T>::tmp(const tmp<T>&& t) noexcept
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:
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ptr_(t.ptr_),
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type_(t.type_)
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{
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t.ptr_ = nullptr;
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t.type_ = PTR;
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}
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template<class T>
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inline Foam::tmp<T>::tmp(const tmp<T>& t)
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:
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ptr_(t.ptr_),
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type_(t.type_)
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{
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if (isTmp())
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{
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if (ptr_)
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{
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operator++();
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}
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else
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{
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FatalErrorInFunction
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<< "Attempted copy of a deallocated " << typeName()
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<< abort(FatalError);
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}
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}
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}
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template<class T>
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inline Foam::tmp<T>::tmp(const tmp<T>& t, bool reuse)
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:
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ptr_(t.ptr_),
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type_(t.type_)
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{
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if (isTmp())
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{
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if (ptr_)
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{
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if (reuse)
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{
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t.ptr_ = nullptr; // t.type_ already set as PTR
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}
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else
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{
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operator++();
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}
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}
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else
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{
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FatalErrorInFunction
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<< "Attempted copy of a deallocated " << typeName()
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<< abort(FatalError);
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}
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}
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}
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template<class T>
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inline Foam::tmp<T>::~tmp()
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{
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clear();
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}
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// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
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template<class T>
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inline bool Foam::tmp<T>::isTmp() const noexcept
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{
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return type_ == PTR;
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}
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template<class T>
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inline bool Foam::tmp<T>::empty() const noexcept
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{
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return (!ptr_ && isTmp());
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}
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template<class T>
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inline bool Foam::tmp<T>::valid() const noexcept
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{
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return (ptr_ || type_ == CREF);
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}
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template<class T>
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inline bool Foam::tmp<T>::movable() const noexcept
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{
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return (type_ == PTR && ptr_ && ptr_->unique());
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}
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template<class T>
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inline Foam::word Foam::tmp<T>::typeName() const
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{
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return "tmp<" + word(typeid(T).name()) + '>';
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}
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template<class T>
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inline T* Foam::tmp<T>::get() noexcept
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{
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return ptr_; // non-const pointer
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}
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template<class T>
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inline const T* Foam::tmp<T>::get() const noexcept
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{
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return ptr_; // const pointer
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}
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template<class T>
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inline const T& Foam::tmp<T>::cref() const
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{
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if (isTmp())
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{
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if (!ptr_)
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{
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FatalErrorInFunction
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<< typeName() << " deallocated"
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<< abort(FatalError);
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}
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}
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return *ptr_; // const reference
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}
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template<class T>
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inline T& Foam::tmp<T>::ref() const
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{
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if (isTmp())
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{
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if (!ptr_)
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{
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FatalErrorInFunction
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<< typeName() << " deallocated"
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<< abort(FatalError);
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}
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}
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else
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{
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FatalErrorInFunction
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<< "Attempted non-const reference to const object from a "
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<< typeName()
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<< abort(FatalError);
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}
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return *ptr_; // non-const reference
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}
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template<class T>
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inline T& Foam::tmp<T>::constCast() const
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{
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if (isTmp() && !ptr_)
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{
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FatalErrorInFunction
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<< typeName() << " deallocated"
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<< abort(FatalError);
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}
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return const_cast<T&>(*ptr_);
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}
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template<class T>
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inline T* Foam::tmp<T>::ptr() const
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{
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if (isTmp())
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{
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if (!ptr_)
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{
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FatalErrorInFunction
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<< typeName() << " deallocated"
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<< abort(FatalError);
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}
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else if (!ptr_->unique())
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{
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FatalErrorInFunction
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<< "Attempt to acquire pointer to object referred to"
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<< " by multiple temporaries of type " << typeName()
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<< abort(FatalError);
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}
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T* ptr = ptr_;
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ptr_ = nullptr;
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return ptr;
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}
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return ptr_->clone().ptr();
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}
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template<class T>
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inline void Foam::tmp<T>::clear() const noexcept
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{
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if (isTmp() && ptr_)
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{
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if (ptr_->unique())
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{
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delete ptr_;
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}
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else
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{
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ptr_->operator--();
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}
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ptr_ = nullptr;
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}
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}
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template<class T>
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inline void Foam::tmp<T>::reset() noexcept
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{
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clear();
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ptr_ = nullptr;
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type_ = PTR;
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}
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template<class T>
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inline void Foam::tmp<T>::reset(T* p) noexcept
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{
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clear();
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ptr_ = p;
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type_ = PTR;
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}
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template<class T>
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inline void Foam::tmp<T>::cref(const T& obj) noexcept
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{
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clear();
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ptr_ = const_cast<T*>(&obj);
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type_ = CREF;
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}
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template<class T>
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inline void Foam::tmp<T>::swap(tmp<T>& other) noexcept
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{
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// Copy/assign for pointer types
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T* p = ptr_;
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ptr_ = other.ptr_;
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other.ptr_ = p;
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refType t = type_;
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type_ = other.type_;
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other.type_ = t;
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}
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// * * * * * * * * * * * * * * * Member Operators * * * * * * * * * * * * * //
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template<class T>
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inline const T& Foam::tmp<T>::operator()() const
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{
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return cref();
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}
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template<class T>
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inline Foam::tmp<T>::operator const T&() const
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{
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return cref();
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}
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template<class T>
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inline const T* Foam::tmp<T>::operator->() const
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{
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if (!ptr_ && isTmp())
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{
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FatalErrorInFunction
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<< typeName() << " deallocated"
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<< abort(FatalError);
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}
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return ptr_;
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}
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template<class T>
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inline T* Foam::tmp<T>::operator->()
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{
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if (isTmp())
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{
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if (!ptr_)
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{
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FatalErrorInFunction
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<< typeName() << " deallocated"
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<< abort(FatalError);
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}
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}
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else
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{
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FatalErrorInFunction
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<< "Attempt to cast const object to non-const for a " << typeName()
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<< abort(FatalError);
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}
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return ptr_;
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}
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template<class T>
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inline void Foam::tmp<T>::operator=(T* p)
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{
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clear();
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if (!p)
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{
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FatalErrorInFunction
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<< "Attempted copy of a deallocated " << typeName()
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<< abort(FatalError);
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}
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else if (!p->unique())
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{
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FatalErrorInFunction
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<< "Attempted assignment of a " << typeName()
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<< " to non-unique pointer"
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<< abort(FatalError);
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}
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ptr_ = p;
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type_ = PTR;
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}
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template<class T>
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inline void Foam::tmp<T>::operator=(const tmp<T>& t)
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{
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clear();
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if (t.isTmp())
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{
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ptr_ = t.ptr_;
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type_ = PTR;
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t.ptr_ = nullptr;
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if (!ptr_)
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{
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FatalErrorInFunction
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<< "Attempted assignment to a deallocated " << typeName()
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<< abort(FatalError);
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}
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}
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else
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{
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FatalErrorInFunction
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<< "Attempted assignment to a const reference to an object"
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<< " of type " << typeid(T).name()
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<< abort(FatalError);
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}
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}
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// ************************************************************************* //
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