58 lines
1.4 KiB
C++
58 lines
1.4 KiB
C++
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/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* Licensed under the Apache License Version 2.0 with LLVM Exceptions
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* https://llvm.org/LICENSE.txt
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <type_traits>
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#include <utility>
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#include <unifex/detail/prologue.hpp>
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namespace unifex {
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template <typename Func>
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struct scope_guard {
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private:
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static_assert(std::is_nothrow_move_constructible_v<Func>);
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UNIFEX_NO_UNIQUE_ADDRESS Func func_;
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bool released_ = false;
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public:
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scope_guard(Func&& func) noexcept
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: func_((Func &&) func) {}
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~scope_guard() {
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reset();
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}
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void release() noexcept {
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released_ = true;
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}
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void reset() noexcept {
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static_assert(noexcept(((Func &&) func_)()));
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if (!std::exchange(released_, true)) {
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((Func &&) func_)();
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}
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}
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};
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template <typename Func>
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scope_guard(Func&& func) -> scope_guard<Func>;
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} // namespace unifex
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#include <unifex/detail/epilogue.hpp>
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