629ba87139
Implementing this Was harder than I first expected. The basic idea is as follows: The master process puts each message arriving from a client that isn't "canceltiles" into a (client-specific) queue. A separate thread that pulls messages from the queue at its own pace and handles them as before. Incoming "canceltiles" messages are handled specially, though: The queue is emptied of "tile" messages. The above sounds simple but there are several details that were a bit tricky to get right.
65 lines
1.5 KiB
C++
65 lines
1.5 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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#ifndef INCLUDED_TSQUEUE_H
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#define INCLUDED_TSQUEUE_H
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#include "config.h"
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#include <condition_variable>
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#include <mutex>
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#include <deque>
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// Thread-safe queue
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template <class T>
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class tsqueue
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{
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public:
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void put(const T& value)
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{
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std::unique_lock<std::mutex> lock(_mutex);
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_queue.push_back(value);
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lock.unlock();
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_cv.notify_one();
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}
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T get()
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{
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std::unique_lock<std::mutex> lock(_mutex);
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_cv.wait(lock, [this] { return _queue.size() > 0; });
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T result = _queue.front();
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_queue.pop_front();
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return result;
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}
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void clear()
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{
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std::unique_lock<std::mutex> lock(_mutex);
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while (_queue.size())
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_queue.pop_front();
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}
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template<class UnaryPredicate>
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void remove_if(UnaryPredicate p)
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{
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std::unique_lock<std::mutex> lock(_mutex);
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_queue.erase(std::remove_if(_queue.begin(), _queue.end(), p),
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_queue.end());
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}
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private:
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std::mutex _mutex;
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std::condition_variable _cv;
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std::deque<T> _queue;
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};
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#endif
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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