115 lines
2.9 KiB
C++
115 lines
2.9 KiB
C++
// Copyright (c) 2012-2015, The CryptoNote developers, The Bytecoin developers
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//
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// This file is part of Bytecoin.
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//
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// Bytecoin is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser 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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//
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// Bytecoin 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 Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with Bytecoin. If not, see <http://www.gnu.org/licenses/>.
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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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