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58 lines
1.3 KiB
C++
58 lines
1.3 KiB
C++
/**
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* Copyright (c) 2018-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed as defined on the LICENSE file found in the
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* root directory of this source tree.
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*/
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#pragma once
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#include <utility>
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namespace osquery {
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namespace scope_guard {
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/**
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* The RAII based scope guard class.
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*
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* To be sure that resources are always released/removed/closed/verified/stoped
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* in face of multiple return statements from the function.
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*
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* It takes functor object by value during the construction. It is going to be
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* called once and only once during the destruction of Guard object.
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*
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* There is helper function to create the object of guard.
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* @code{.cpp}
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* {
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* auto const manager = scope_guard::create(
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* [&file_path]() { fs::remove(file_path); }
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* );
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* ...
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* // it will be removed at the end of scope
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* }
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* @endcode
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*/
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template <typename FinalRoutineType>
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class Guard final {
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public:
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explicit Guard(FinalRoutineType final_routine)
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: final_routine_(std::move(final_routine)) {}
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~Guard() {
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final_routine_();
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}
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private:
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FinalRoutineType final_routine_;
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};
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template <typename FinalRoutineType>
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inline auto create(FinalRoutineType&& final_routine) {
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return Guard<FinalRoutineType>(std::forward<FinalRoutineType>(final_routine));
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}
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} // namespace scope_guard
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} // namespace osquery
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