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/* |
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* Scope Guard |
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* Copyright (C) 2017 offa |
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* |
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* This file is part of Scope Guard. |
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* |
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* Scope Guard is free software: you can redistribute it and/or modify |
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* it 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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* |
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* Scope Guard is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with Scope Guard. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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#pragma once |
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#include <utility> |
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#include <type_traits> |
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namespace sr |
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{ |
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namespace detail |
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{ |
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template<class EF> |
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class scope_guard_base |
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{ |
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public: |
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template<class EFP, |
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std::enable_if_t<std::is_constructible<EF, EFP>::value, int> = 0, |
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std::enable_if_t<(!std::is_lvalue_reference<EFP>::value) |
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&& std::is_nothrow_constructible<EF, EFP>::value, int> = 0 |
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> |
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explicit scope_guard_base(EFP&& exitFunction) : m_exitFunction(std::move(exitFunction)), m_execute_on_destruction(true) |
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{ |
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} |
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template<class EFP, |
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std::enable_if_t<std::is_constructible<EF, EFP>::value, int> = 0, |
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std::enable_if_t<std::is_lvalue_reference<EFP>::value, int> = 0 |
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> |
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explicit scope_guard_base(EFP&& exitFunction) try : m_exitFunction(exitFunction), m_execute_on_destruction(true) |
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{ |
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} |
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catch( ... ) |
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{ |
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exitFunction(); |
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throw; |
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} |
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template<class T = EF, |
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std::enable_if_t<std::is_nothrow_move_constructible<T>::value, int> = 0 |
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> |
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scope_guard_base(scope_guard_base&& other) noexcept(std::is_nothrow_move_constructible<T>::value || std::is_nothrow_copy_constructible<T>::value) |
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: m_exitFunction(std::move(other.m_exitFunction)), |
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m_execute_on_destruction(other.m_execute_on_destruction) |
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{ |
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other.release(); |
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} |
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template<class T = EF, |
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std::enable_if_t<!std::is_nothrow_move_constructible<T>::value, int> = 0 |
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> |
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scope_guard_base(scope_guard_base&& other) noexcept(std::is_nothrow_move_constructible<T>::value || std::is_nothrow_copy_constructible<T>::value) |
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: m_exitFunction(other.m_exitFunction), |
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m_execute_on_destruction(other.m_execute_on_destruction) |
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{ |
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other.release(); |
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} |
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scope_guard_base(const scope_guard_base&) = delete; |
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~scope_guard_base() noexcept(true) |
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{ |
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if( m_execute_on_destruction == true ) |
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{ |
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m_exitFunction(); |
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} |
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} |
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void release() noexcept |
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{ |
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m_execute_on_destruction = false; |
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} |
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scope_guard_base& operator=(const scope_guard_base&) = delete; |
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scope_guard_base& operator=(scope_guard_base&&) = delete; |
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protected: |
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EF m_exitFunction; |
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bool m_execute_on_destruction; |
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}; |
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} |
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} |