102 lines
2.4 KiB
C++
102 lines
2.4 KiB
C++
// Copyright (c) 2011-2016 The Cryptonote developers
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// Distributed under the MIT/X11 software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#pragma once
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#include <queue>
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#include "IntrusiveLinkedList.h"
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#include "System/Event.h"
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#include "System/InterruptedException.h"
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namespace CryptoNote {
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template<class MessageType> class MessageQueue {
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public:
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MessageQueue(System::Dispatcher& dispatcher);
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const MessageType& front();
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void pop();
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void push(const MessageType& message);
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void stop();
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typename IntrusiveLinkedList<MessageQueue<MessageType>>::hook& getHook();
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private:
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void wait();
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std::queue<MessageType> messageQueue;
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System::Event event;
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bool stopped;
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typename IntrusiveLinkedList<MessageQueue<MessageType>>::hook hook;
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};
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template<class MessageQueueContainer, class MessageType>
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class MesageQueueGuard {
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public:
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MesageQueueGuard(MessageQueueContainer& container, MessageQueue<MessageType>& messageQueue) : container(container), messageQueue(messageQueue) {
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container.addMessageQueue(messageQueue);
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}
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MesageQueueGuard(const MesageQueueGuard& other) = delete;
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MesageQueueGuard& operator=(const MesageQueueGuard& other) = delete;
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~MesageQueueGuard() {
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container.removeMessageQueue(messageQueue);
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}
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private:
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MessageQueueContainer& container;
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MessageQueue<MessageType>& messageQueue;
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};
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template<class MessageType>
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MessageQueue<MessageType>::MessageQueue(System::Dispatcher& dispatcher) : event(dispatcher), stopped(false) {}
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template<class MessageType>
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void MessageQueue<MessageType>::wait() {
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if (messageQueue.empty()) {
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if (stopped) {
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throw System::InterruptedException();
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}
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event.clear();
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while (!event.get()) {
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event.wait();
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}
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}
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}
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template<class MessageType>
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const MessageType& MessageQueue<MessageType>::front() {
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wait();
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return messageQueue.front();
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}
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template<class MessageType>
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void MessageQueue<MessageType>::pop() {
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wait();
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messageQueue.pop();
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}
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template<class MessageType>
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void MessageQueue<MessageType>::push(const MessageType& message) {
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messageQueue.push(message);
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event.set();
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}
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template<class MessageType>
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void MessageQueue<MessageType>::stop() {
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stopped = true;
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event.set();
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}
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template<class MessageType>
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typename IntrusiveLinkedList<MessageQueue<MessageType>>::hook& MessageQueue<MessageType>::getHook() {
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return hook;
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}
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}
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