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annotate OrthancFramework/Sources/MultiThreading/SharedMessageQueue.h @ 4494:39192eb9b43d

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Thu, 04 Feb 2021 15:31:00 +0100
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2021 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU Lesser General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Lesser General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Lesser General Public
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18 * License along with this program. If not, see
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19 * <http://www.gnu.org/licenses/>.
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20 **/
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23 #pragma once
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24
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25 #include "../IDynamicObject.h"
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27 #include <stdint.h>
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28 #include <list>
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29 #include <boost/thread.hpp>
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31 namespace Orthanc
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32 {
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33 class ORTHANC_PUBLIC SharedMessageQueue : public boost::noncopyable
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34 {
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35 private:
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36 typedef std::list<IDynamicObject*> Queue;
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37
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38 bool isFifo_;
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39 unsigned int maxSize_;
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40 Queue queue_;
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41 boost::mutex mutex_;
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42 boost::condition_variable elementAvailable_;
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43 boost::condition_variable emptied_;
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45 public:
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46 explicit SharedMessageQueue(unsigned int maxSize = 0);
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48 ~SharedMessageQueue();
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50 // This transfers the ownership of the message
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51 void Enqueue(IDynamicObject* message);
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53 // The caller is responsible to delete the dequeud message!
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54 IDynamicObject* Dequeue(int32_t millisecondsTimeout);
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56 bool WaitEmpty(int32_t millisecondsTimeout);
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58 bool IsFifoPolicy() const;
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60 bool IsLifoPolicy() const;
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62 void SetFifoPolicy();
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64 void SetLifoPolicy();
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66 void Clear();
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68 size_t GetSize();
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69 };
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70 }