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annotate Resources/Orthanc/Core/MultiThreading/ReaderWriterLock.cpp @ 202:e7f90aba3c97

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 26 Mar 2018 18:10:34 +0200
parents 03afbee0cc7b
children
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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) 2017-2018 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 General Public License as
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9 * published by the Free Software Foundation, either version 3 of the
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10 * License, or (at your option) any later version.
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11 *
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12 * In addition, as a special exception, the copyright holders of this
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13 * program give permission to link the code of its release with the
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14 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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15 * that use the same license as the "OpenSSL" library), and distribute
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16 * the linked executables. You must obey the GNU General Public License
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17 * in all respects for all of the code used other than "OpenSSL". If you
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18 * modify file(s) with this exception, you may extend this exception to
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19 * your version of the file(s), but you are not obligated to do so. If
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20 * you do not wish to do so, delete this exception statement from your
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21 * version. If you delete this exception statement from all source files
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22 * in the program, then also delete it here.
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23 *
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24 * This program is distributed in the hope that it will be useful, but
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25 * WITHOUT ANY WARRANTY; without even the implied warranty of
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26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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27 * General Public License for more details.
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28 *
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29 * You should have received a copy of the GNU General Public License
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30 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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31 **/
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32
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33
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34 #include "../PrecompiledHeaders.h"
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35 #include "ReaderWriterLock.h"
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36
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37 #include <boost/thread/shared_mutex.hpp>
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38
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39 namespace Orthanc
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40 {
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41 namespace
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42 {
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43 // Anonymous namespace to avoid clashes between compilation
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44 // modules.
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45
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46 class ReaderLockable : public ILockable
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47 {
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48 private:
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49 boost::shared_mutex& lock_;
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50
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51 protected:
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52 virtual void Lock()
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53 {
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54 lock_.lock_shared();
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55 }
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56
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57 virtual void Unlock()
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58 {
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59 lock_.unlock_shared();
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60 }
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61
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62 public:
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63 explicit ReaderLockable(boost::shared_mutex& lock) : lock_(lock)
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64 {
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65 }
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66 };
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67
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68
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69 class WriterLockable : public ILockable
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70 {
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71 private:
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72 boost::shared_mutex& lock_;
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73
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74 protected:
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75 virtual void Lock()
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76 {
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77 lock_.lock();
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78 }
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79
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80 virtual void Unlock()
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81 {
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82 lock_.unlock();
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83 }
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84
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85 public:
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86 explicit WriterLockable(boost::shared_mutex& lock) : lock_(lock)
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87 {
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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 struct ReaderWriterLock::PImpl
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93 {
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94 boost::shared_mutex lock_;
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95 ReaderLockable reader_;
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96 WriterLockable writer_;
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97
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98 PImpl() : reader_(lock_), writer_(lock_)
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99 {
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100 }
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101 };
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102
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103
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104 ReaderWriterLock::ReaderWriterLock()
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105 {
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106 pimpl_ = new PImpl;
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107 }
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108
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109
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110 ReaderWriterLock::~ReaderWriterLock()
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111 {
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112 delete pimpl_;
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113 }
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114
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115
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116 ILockable& ReaderWriterLock::ForReader()
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117 {
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118 return pimpl_->reader_;
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119 }
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120
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121
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122 ILockable& ReaderWriterLock::ForWriter()
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123 {
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124 return pimpl_->writer_;
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125 }
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126 }