51 lines
1.1 KiB
C++
51 lines
1.1 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2019
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#pragma once
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#include "td/actor/actor.h"
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#include "td/actor/PromiseFuture.h"
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#include "td/utils/common.h"
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namespace td {
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class Condition {
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class Helper : public Actor {
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public:
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void wait(Promise<> promise) {
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pending_promises_.push_back(std::move(promise));
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}
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private:
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std::vector<Promise<>> pending_promises_;
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void tear_down() override {
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for (auto &promise : pending_promises_) {
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promise.set_value(Unit());
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}
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}
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};
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public:
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Condition() {
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own_actor_ = create_actor<Helper>("helper");
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actor_ = own_actor_.get();
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}
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void wait(Promise<> promise) {
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send_closure(actor_, &Helper::wait, std::move(promise));
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}
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void set_true() {
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CHECK(!own_actor_.empty());
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own_actor_.reset();
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}
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private:
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ActorId<Helper> actor_;
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ActorOwn<Helper> own_actor_;
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};
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} // namespace td
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