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GenericThread used to accept an optional "parent" argument, defaulting to nullptr. This was odd, because the moveToThread() in GenericThread::initialize() would become a no-op if the instance ever inits QObject(someNonNullParentQObject). (The only clue would be a log message "QObject::moveToThread: Cannot move objects with a parent", and things would end up in the same thread that created the instance.) As it turns out, all the subclasses of GenericThread do not init GenericThread(parent), so things worked as expected.
72 lines
1.6 KiB
C++
72 lines
1.6 KiB
C++
//
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// Created by Bradley Austin Davis 2015/07/08.
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// Copyright 2015 High Fidelity, Inc.
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//
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// Distributed under the Apache License, Version 2.0.
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// See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
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//
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#pragma once
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#ifndef hifi_GenericQueueThread_h
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#define hifi_GenericQueueThread_h
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#include <stdint.h>
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#include <QQueue>
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#include <QMutex>
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#include <QWaitCondition>
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#include "GenericThread.h"
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#include "NumericalConstants.h"
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template <typename T>
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class GenericQueueThread : public GenericThread {
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public:
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using Queue = QQueue<T>;
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GenericQueueThread(QObject* parent = nullptr)
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: GenericThread() {}
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virtual ~GenericQueueThread() {}
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void queueItem(const T& t) {
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lock();
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queueItemInternal(t);
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unlock();
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_hasItems.wakeAll();
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}
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protected:
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virtual void queueItemInternal(const T& t) {
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_items.push_back(t);
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}
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virtual uint32_t getMaxWait() {
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return MSECS_PER_SECOND;
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}
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virtual bool process() {
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if (!_items.size()) {
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_hasItemsMutex.lock();
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_hasItems.wait(&_hasItemsMutex, getMaxWait());
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_hasItemsMutex.unlock();
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}
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if (!_items.size()) {
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return isStillRunning();
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}
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Queue processItems;
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lock();
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processItems.swap(_items);
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unlock();
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return processQueueItems(processItems);
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}
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virtual bool processQueueItems(const Queue& items) = 0;
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Queue _items;
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QWaitCondition _hasItems;
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QMutex _hasItemsMutex;
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};
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#endif // hifi_GenericQueueThread_h
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