mirror of
https://github.com/DarkMatterCore/nxdumptool.git
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80 lines
2.3 KiB
C++
80 lines
2.3 KiB
C++
/*
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* scope_guard.hpp
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*
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* Copyright (c) 2018-2021, SciresM.
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* Copyright (c) 2020-2022, DarkMatterCore <pabloacurielz@gmail.com>.
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*
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* Scope guard logic lovingly taken from Andrei Alexandrescu's "Systemic Error Handling in C++".
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*
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* This file is part of nxdumptool (https://github.com/DarkMatterCore/nxdumptool).
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*
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* nxdumptool 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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* nxdumptool 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 this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#pragma once
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#ifndef __SCOPE_GUARD_HPP__
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#define __SCOPE_GUARD_HPP__
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#include "defines.h"
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#define SCOPE_GUARD ::nxdt::utils::ScopeGuardOnExit() + [&]() ALWAYS_INLINE_LAMBDA
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#define ON_SCOPE_EXIT auto ANONYMOUS_VARIABLE(SCOPE_EXIT_STATE_) = SCOPE_GUARD
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namespace nxdt::utils {
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template<class F>
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class ScopeGuard {
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NON_COPYABLE(ScopeGuard);
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private:
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F f;
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bool active;
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public:
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constexpr ALWAYS_INLINE ScopeGuard(F f) : f(std::move(f)), active(true) {}
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constexpr ALWAYS_INLINE ~ScopeGuard()
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{
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if (active) f();
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}
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constexpr ALWAYS_INLINE void Cancel()
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{
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active = false;
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}
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constexpr ALWAYS_INLINE ScopeGuard(ScopeGuard&& rhs) : f(std::move(rhs.f)), active(rhs.active)
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{
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rhs.Cancel();
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}
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ScopeGuard &operator=(ScopeGuard&& rhs) = delete;
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};
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template<class F>
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constexpr ALWAYS_INLINE ScopeGuard<F> MakeScopeGuard(F f)
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{
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return ScopeGuard<F>(std::move(f));
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}
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enum class ScopeGuardOnExit {};
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template <typename F>
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constexpr ALWAYS_INLINE ScopeGuard<F> operator+(ScopeGuardOnExit, F&& f)
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{
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return ScopeGuard<F>(std::forward<F>(f));
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}
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}
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#endif /* __SCOPE_GUARD_HPP__ */
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