mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-12-23 10:52:13 +00:00
58 lines
1.9 KiB
C++
58 lines
1.9 KiB
C++
/*
|
|
* Copyright (c) 2018-2020 Atmosphère-NX
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
/* Scope guard logic lovingly taken from Andrei Alexandrescu's "Systemic Error Handling in C++" */
|
|
#pragma once
|
|
#include "../defines.hpp"
|
|
|
|
namespace ams::util {
|
|
|
|
namespace impl {
|
|
|
|
template<class F>
|
|
class ScopeGuard {
|
|
NON_COPYABLE(ScopeGuard);
|
|
private:
|
|
F f;
|
|
bool active;
|
|
public:
|
|
constexpr ALWAYS_INLINE ScopeGuard(F f) : f(std::move(f)), active(true) { }
|
|
ALWAYS_INLINE ~ScopeGuard() { if (active) { f(); } }
|
|
ALWAYS_INLINE void Cancel() { active = false; }
|
|
|
|
ALWAYS_INLINE ScopeGuard(ScopeGuard&& rhs) : f(std::move(rhs.f)), active(rhs.active) {
|
|
rhs.Cancel();
|
|
}
|
|
};
|
|
|
|
template<class F>
|
|
constexpr ALWAYS_INLINE ScopeGuard<F> MakeScopeGuard(F f) {
|
|
return ScopeGuard<F>(std::move(f));
|
|
}
|
|
|
|
enum class ScopeGuardOnExit {};
|
|
|
|
template <typename F>
|
|
constexpr ALWAYS_INLINE ScopeGuard<F> operator+(ScopeGuardOnExit, F&& f) {
|
|
return ScopeGuard<F>(std::forward<F>(f));
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#define SCOPE_GUARD ::ams::util::impl::ScopeGuardOnExit() + [&]() ALWAYS_INLINE_LAMBDA
|
|
#define ON_SCOPE_EXIT auto ANONYMOUS_VARIABLE(SCOPE_EXIT_STATE_) = SCOPE_GUARD
|