85 lines
1.9 KiB
C++
85 lines
1.9 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2018
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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/utils/common.h"
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namespace td {
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namespace actor2 {
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class ActorSignals {
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public:
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ActorSignals() = default;
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uint32 raw() const {
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return raw_;
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}
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bool empty() const {
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return raw_ == 0;
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}
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bool has_signal(uint32 signal) const {
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return (raw_ & (1u << signal)) != 0;
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}
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void add_signal(uint32 signal) {
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raw_ |= (1u << signal);
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}
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void add_signals(ActorSignals signals) {
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raw_ |= signals.raw();
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}
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void clear_signal(uint32 signal) {
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raw_ &= ~(1u << signal);
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}
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uint32 first_signal() {
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if (!raw_) {
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return 0;
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}
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#if TD_MSVC
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int res = 0;
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int bit = 1;
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while ((raw_ & bit) == 0) {
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res++;
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bit <<= 1;
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}
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return res;
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#else
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return __builtin_ctz(raw_);
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#endif
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}
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enum Signal : uint32 {
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// Signals in order of priority
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Wakeup = 1,
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Alarm = 2,
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Kill = 3, // immediate kill
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Io = 4, // move to io thread
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Cpu = 5, // move to cpu thread
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StartUp = 6,
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TearDown = 7,
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// Two signals for mpmc queue logic
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//
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// PopSignal is set after actor is popped from queue
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// When processed it should set InQueue and Pause flags to false.
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//
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// MessagesSignal is set after new messages was added to actor
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// If owner of actor wish to delay message handling, she should set InQueue flag to true and
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// add actor into mpmc queue.
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Pop = 8, // got popped from queue
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Message = 9, // got new message
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};
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static ActorSignals one(uint32 signal) {
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ActorSignals res;
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res.add_signal(signal);
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return res;
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}
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private:
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uint32 raw_{0};
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friend class ActorState;
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explicit ActorSignals(uint32 raw) : raw_(raw) {
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}
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};
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} // namespace actor2
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} // namespace td
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