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annotate Framework/Messages/LockingEmitter.h @ 1097:4383382db01d broker

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deprecating LockingEmitter
author Sebastien Jodogne <s.jodogne@gmail.com>
date Thu, 24 Oct 2019 22:31:18 +0200
parents f72d1ab42932
children 17660df24c36
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1 /**
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2 * Stone of Orthanc
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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) 2017-2019 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 Affero 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 * Affero 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 Affero General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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20
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21 #pragma once
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22
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23 #include <Core/Enumerations.h>
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24 #include <Core/OrthancException.h>
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25
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26 #include "IMessageEmitter.h"
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27 #include "IObservable.h"
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28
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29 #include <Core/Enumerations.h> // For ORTHANC_OVERRIDE
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30
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31 #include <boost/thread/shared_mutex.hpp>
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32
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33 namespace OrthancStone
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34 {
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35 namespace Deprecated
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36 {
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37 /**
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38 * This class is used when using the ThreadedOracle : since messages
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39 * can be sent from multiple Oracle threads, this IMessageEmitter
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40 * implementation serializes the callbacks.
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41 *
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42 * The internal mutex used in Oracle messaging can also be used to
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43 * protect the application data. Thus, this class can be used as a single
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44 * application-wide mutex.
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45 */
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46 class LockingEmitter : public IMessageEmitter
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47 {
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48 private:
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49 boost::shared_mutex mutex_;
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50 IObservable oracleObservable_;
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51
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52 public:
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53 virtual void EmitMessage(boost::weak_ptr<IObserver>& observer,
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54 const IMessage& message) ORTHANC_OVERRIDE;
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55
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56
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57 class ReaderLock : public boost::noncopyable
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58 {
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59 private:
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60 LockingEmitter& that_;
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61 boost::shared_lock<boost::shared_mutex> lock_;
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62
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63 public:
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64 ReaderLock(LockingEmitter& that) :
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65 that_(that),
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66 lock_(that.mutex_)
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67 {
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68 }
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69 };
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71
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72 class WriterLock : public boost::noncopyable
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73 {
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74 private:
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75 LockingEmitter& that_;
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76 boost::unique_lock<boost::shared_mutex> lock_;
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77
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78 public:
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79 WriterLock(LockingEmitter& that) :
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80 that_(that),
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81 lock_(that.mutex_)
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82 {
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83 }
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84
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85 IObservable& GetOracleObservable()
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86 {
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87 return that_.oracleObservable_;
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88 }
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89 };
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90 };
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91 }
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92 }