77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
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/*
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This file is part of Telegram Desktop,
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the official desktop version of Telegram messaging app, see https://telegram.org
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Telegram Desktop is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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It 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 General Public License for more details.
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In addition, as a special exception, the copyright holders give permission
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to link the code of portions of this program with the OpenSSL library.
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Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
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Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
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*/
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#pragma once
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#include "base/lambda.h"
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#include "base/algorithm.h"
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#include <functional>
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namespace rpl {
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class lifetime {
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public:
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lifetime() = default;
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lifetime(lifetime &&other);
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lifetime &operator=(lifetime &&other);
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template <typename Destroy, typename = decltype(std::declval<Destroy>()())>
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lifetime(Destroy &&destroy) : _destroy(std::forward<Destroy>(destroy)) {
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}
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void add(lifetime other) {
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_nested.push_back(std::move(other));
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}
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void destroy() {
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auto nested = std::exchange(_nested, std::vector<lifetime>());
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auto callback = std::exchange(_destroy, base::lambda_once<void()>());
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if (!nested.empty()) {
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nested.clear();
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}
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if (callback) {
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callback();
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}
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}
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~lifetime() {
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destroy();
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}
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private:
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base::lambda_once<void()> _destroy;
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std::vector<lifetime> _nested;
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};
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lifetime::lifetime(lifetime &&other)
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: _destroy(std::exchange(other._destroy, base::lambda_once<void()>()))
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, _nested(std::exchange(other._nested, std::vector<lifetime>())) {
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}
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lifetime &lifetime::operator=(lifetime &&other) {
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_destroy = std::exchange(other._destroy, base::lambda_once<void()>());
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_nested = std::exchange(other._nested, std::vector<lifetime>());
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return *this;
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}
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} // namespace rpl
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