annotate OrthancFramework/Resources/Graveyard/Multithreading/ReaderWriterLock.cpp @ 5834:79a497908b04 attach-custom-data tip

merged find-refactoring -> attach-custom-data
author Alain Mazy <am@orthanc.team>
date Wed, 09 Oct 2024 11:06:20 +0200
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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) 2017-2023 Osimis S.A., Belgium
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6 * Copyright (C) 2024-2024 Orthanc Team SRL, Belgium
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7 * Copyright (C) 2021-2024 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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8 *
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9 * This program is free software: you can redistribute it and/or
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10 * modify it under the terms of the GNU Lesser General Public License
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11 * as published by the Free Software Foundation, either version 3 of
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12 * the License, or (at your option) any later version.
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13 *
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14 * This program is distributed in the hope that it will be useful, but
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15 * WITHOUT ANY WARRANTY; without even the implied warranty of
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16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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17 * Lesser General Public License for more details.
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18 *
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19 * You should have received a copy of the GNU Lesser General Public
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20 * License along with this program. If not, see
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21 * <http://www.gnu.org/licenses/>.
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22 **/
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23
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24
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25 #include "../PrecompiledHeaders.h"
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26 #include "ReaderWriterLock.h"
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27
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28 #include <boost/thread/shared_mutex.hpp>
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29
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30 namespace Orthanc
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31 {
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32 namespace
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33 {
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34 // Anonymous namespace to avoid clashes between compilation
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35 // modules.
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36
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37 class ReaderLockable : public ILockable
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38 {
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39 private:
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40 boost::shared_mutex& lock_;
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41
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42 protected:
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43 virtual void Lock()
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44 {
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45 lock_.lock_shared();
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46 }
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47
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48 virtual void Unlock()
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49 {
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50 lock_.unlock_shared();
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51 }
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52
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53 public:
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54 explicit ReaderLockable(boost::shared_mutex& lock) : lock_(lock)
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55 {
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56 }
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57 };
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58
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59
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60 class WriterLockable : public ILockable
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61 {
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62 private:
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63 boost::shared_mutex& lock_;
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64
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65 protected:
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66 virtual void Lock()
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67 {
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68 lock_.lock();
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69 }
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70
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71 virtual void Unlock()
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72 {
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73 lock_.unlock();
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74 }
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75
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76 public:
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77 explicit WriterLockable(boost::shared_mutex& lock) : lock_(lock)
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78 {
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79 }
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80 };
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81 }
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82
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83 struct ReaderWriterLock::PImpl
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84 {
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85 boost::shared_mutex lock_;
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86 ReaderLockable reader_;
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87 WriterLockable writer_;
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88
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89 PImpl() : reader_(lock_), writer_(lock_)
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90 {
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91 }
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92 };
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93
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94
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95 ReaderWriterLock::ReaderWriterLock()
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96 {
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97 pimpl_ = new PImpl;
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98 }
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99
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100
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101 ReaderWriterLock::~ReaderWriterLock()
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102 {
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103 delete pimpl_;
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104 }
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105
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106
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107 ILockable& ReaderWriterLock::ForReader()
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108 {
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109 return pimpl_->reader_;
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110 }
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111
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112
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113 ILockable& ReaderWriterLock::ForWriter()
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114 {
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115 return pimpl_->writer_;
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116 }
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117 }