mirror of https://github.com/PentHertz/srsLTE.git
77 lines
2.1 KiB
C++
77 lines
2.1 KiB
C++
/**
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* Copyright 2013-2022 Software Radio Systems Limited
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*
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* This file is part of srsRAN.
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*
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* srsRAN is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* srsRAN is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* A copy of the GNU Affero General Public License can be found in
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* the LICENSE file in the top-level directory of this distribution
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* and at http://www.gnu.org/licenses/.
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*
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*/
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#ifndef SRSRAN_SCOPE_EXIT_H
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#define SRSRAN_SCOPE_EXIT_H
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#include <type_traits>
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#include <utility>
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namespace srsran {
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namespace detail {
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template <typename Callable>
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struct scope_exit {
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template <typename C>
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explicit scope_exit(C&& f_) : exit_function(std::forward<C>(f_))
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{}
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scope_exit(scope_exit&& rhs) noexcept : exit_function(std::move(rhs.exit_function)), active(rhs.active)
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{
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rhs.release();
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}
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scope_exit(const scope_exit&) = delete;
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scope_exit& operator=(const scope_exit&) = delete;
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scope_exit& operator=(scope_exit&&) noexcept = delete;
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~scope_exit()
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{
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if (active) {
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exit_function();
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}
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}
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void release() { active = false; }
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private:
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Callable exit_function;
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bool active = true;
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};
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} // namespace detail
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/**
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* @brief Defers callable call to scope exit
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* @tparam Callable Any type with a call operator
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* @param callable function that is called at scope exit
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* @return object that has to be stored in a local variable
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*/
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template <typename Callable>
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detail::scope_exit<typename std::decay<Callable>::type> make_scope_exit(Callable&& callable)
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{
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return detail::scope_exit<typename std::decay<Callable>::type>{std::forward<Callable>(callable)};
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}
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#define DEFER(FUNC) auto on_exit_call##__LINE__ = srsran::make_scope_exit([&]() { FUNC })
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} // namespace srsran
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#endif // SRSRAN_SCOPE_EXIT_H
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