fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph
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54 lines
1.5 KiB
54 lines
1.5 KiB
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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#pragma once
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#include <folly/Traits.h>
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#include <utility>
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#include <type_traits>
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namespace folly {
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namespace scope_guard_detail {
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template <typename F>
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class ScopeGuardImpl {
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public:
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explicit ScopeGuardImpl(F&& f) : f_{std::forward<F>(f)} {}
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~ScopeGuardImpl() {
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f_();
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}
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private:
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F f_;
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};
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enum class ScopeGuardEnum {};
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template <typename Func, typename DecayedFunc = _t<std::decay<Func>>>
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ScopeGuardImpl<DecayedFunc> operator+(ScopeGuardEnum, Func&& func) {
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return ScopeGuardImpl<DecayedFunc>{std::forward<Func>(func)};
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}
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} // namespace scope_guard_detail
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} // namespace folly
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/**
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* FB_ANONYMOUS_VARIABLE(str) introduces an identifier starting with
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* str and ending with a number that varies with the line.
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*/
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#ifndef FB_ANONYMOUS_VARIABLE
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#define FB_CONCATENATE_IMPL(s1, s2) s1##s2
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#define FB_CONCATENATE(s1, s2) FB_CONCATENATE_IMPL(s1, s2)
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#ifdef __COUNTER__
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#define FB_ANONYMOUS_VARIABLE(str) \
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FB_CONCATENATE(FB_CONCATENATE(FB_CONCATENATE(str, __COUNTER__), _), __LINE__)
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#else
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#define FB_ANONYMOUS_VARIABLE(str) FB_CONCATENATE(str, __LINE__)
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#endif
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#endif
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#ifndef SCOPE_EXIT
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#define SCOPE_EXIT \
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auto FB_ANONYMOUS_VARIABLE(SCOPE_EXIT_STATE) = \
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::folly::scope_guard_detail::ScopeGuardEnum{} + [&]() noexcept
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#endif
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