113 lines
2.0 KiB
C++
113 lines
2.0 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2020
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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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namespace td {
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class Slot;
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class Signal {
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public:
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void emit();
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explicit Signal(ActorId<Slot> slot_id) : slot_id_(slot_id) {
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}
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private:
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ActorId<Slot> slot_id_;
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};
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class Slot final : public Actor {
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public:
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Slot() = default;
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Slot(const Slot &other) = delete;
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Slot &operator=(const Slot &other) = delete;
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Slot(Slot &&) = default;
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Slot &operator=(Slot &&) = default;
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~Slot() override {
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close();
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}
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void set_event(EventFull &&event) {
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was_signal_ = false;
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event_ = std::move(event);
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}
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bool has_event() {
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return !event_.empty();
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}
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bool was_signal() {
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return was_signal_;
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}
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void clear_event() {
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event_.clear();
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}
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void close() {
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if (!empty()) {
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do_stop();
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}
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}
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void set_timeout_in(double timeout_in) {
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register_if_empty();
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Actor::set_timeout_in(timeout_in);
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}
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void set_timeout_at(double timeout_at) {
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register_if_empty();
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Actor::set_timeout_at(timeout_at);
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}
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friend class Signal;
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Signal get_signal() {
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register_if_empty();
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return Signal(actor_id(this));
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}
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ActorShared<> get_signal_new() {
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register_if_empty();
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return actor_shared();
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}
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private:
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bool was_signal_ = false;
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EventFull event_;
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void timeout_expired() override {
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signal();
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}
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void start_up() override {
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empty();
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}
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void register_if_empty() {
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if (empty()) {
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register_actor("Slot", this).release();
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}
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}
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// send event only once
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void signal() {
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if (!was_signal_) {
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was_signal_ = true;
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event_.try_emit_later();
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}
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}
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void hangup_shared() override {
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signal();
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}
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};
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inline void Signal::emit() {
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send_closure(slot_id_, &Slot::signal);
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}
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} // namespace td
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