mirror of https://github.com/PCSX2/pcsx2.git
65 lines
1.7 KiB
C++
65 lines
1.7 KiB
C++
/* PCSX2 - PS2 Emulator for PCs
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* Copyright (C) 2002-2021 PCSX2 Dev Team
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*
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* PCSX2 is free software: you can redistribute it and/or modify it under the terms
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* of the GNU Lesser General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the 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 along with PCSX2.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "Pcsx2Defs.h"
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#include <optional>
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#include <utility>
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/// ScopedGuard provides an object which runs a function (usually a lambda) when
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/// it goes out of scope. This can be useful for releasing resources or handles
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/// which do not normally have C++ types to automatically release.
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template <typename T>
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class ScopedGuard final
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{
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public:
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__fi ScopedGuard(T&& func)
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: m_func(std::forward<T>(func))
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{
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}
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__fi ScopedGuard(ScopedGuard&& other)
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: m_func(std::move(other.m_func))
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{
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other.m_func = nullptr;
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}
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__fi ~ScopedGuard()
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{
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Run();
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}
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ScopedGuard(const ScopedGuard&) = delete;
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void operator=(const ScopedGuard&) = delete;
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/// Runs the destructor function now instead of when we go out of scope.
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__fi void Run()
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{
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if (!m_func.has_value())
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return;
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m_func.value()();
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m_func.reset();
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}
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/// Prevents the function from being invoked when we go out of scope.
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__fi void Cancel()
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{
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m_func.reset();
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}
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private:
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std::optional<T> m_func;
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};
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