Mercurial > hg > orthanc
annotate Resources/Graveyard/Multithreading/ReaderWriterLock.cpp @ 3640:94f4a18a79cc
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| author | Sebastien Jodogne <s.jodogne@gmail.com> |
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| date | Fri, 31 Jan 2020 17:14:59 +0100 |
| parents | 4e43e67f8ecf |
| children |
| rev | line source |
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| 760 | 1 /** |
| 2 * Orthanc - A Lightweight, RESTful DICOM Store | |
| 1900 | 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) 2017-2020 Osimis S.A., Belgium |
| 760 | 6 * |
| 7 * This program is free software: you can redistribute it and/or | |
| 8 * modify it under the terms of the GNU General Public License as | |
| 9 * published by the Free Software Foundation, either version 3 of the | |
| 10 * License, or (at your option) any later version. | |
| 11 * | |
| 12 * In addition, as a special exception, the copyright holders of this | |
| 13 * program give permission to link the code of its release with the | |
| 14 * OpenSSL project's "OpenSSL" library (or with modified versions of it | |
| 15 * that use the same license as the "OpenSSL" library), and distribute | |
| 16 * the linked executables. You must obey the GNU General Public License | |
| 17 * in all respects for all of the code used other than "OpenSSL". If you | |
| 18 * modify file(s) with this exception, you may extend this exception to | |
| 19 * your version of the file(s), but you are not obligated to do so. If | |
| 20 * you do not wish to do so, delete this exception statement from your | |
| 21 * version. If you delete this exception statement from all source files | |
| 22 * in the program, then also delete it here. | |
| 23 * | |
| 24 * This program is distributed in the hope that it will be useful, but | |
| 25 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 27 * General Public License for more details. | |
| 28 * | |
| 29 * You should have received a copy of the GNU General Public License | |
| 30 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 31 **/ | |
| 32 | |
| 33 | |
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34 #include "../PrecompiledHeaders.h" |
| 760 | 35 #include "ReaderWriterLock.h" |
| 36 | |
| 37 #include <boost/thread/shared_mutex.hpp> | |
| 38 | |
| 39 namespace Orthanc | |
| 40 { | |
| 41 namespace | |
| 42 { | |
| 43 // Anonymous namespace to avoid clashes between compilation | |
| 44 // modules. | |
| 45 | |
| 46 class ReaderLockable : public ILockable | |
| 47 { | |
| 48 private: | |
| 49 boost::shared_mutex& lock_; | |
| 50 | |
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51 protected: |
| 760 | 52 virtual void Lock() |
| 53 { | |
| 54 lock_.lock_shared(); | |
| 55 } | |
| 56 | |
| 57 virtual void Unlock() | |
| 58 { | |
| 59 lock_.unlock_shared(); | |
| 60 } | |
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61 |
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62 public: |
| 2223 | 63 explicit ReaderLockable(boost::shared_mutex& lock) : lock_(lock) |
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64 { |
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65 } |
| 760 | 66 }; |
| 67 | |
| 68 | |
| 69 class WriterLockable : public ILockable | |
| 70 { | |
| 71 private: | |
| 72 boost::shared_mutex& lock_; | |
| 73 | |
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74 protected: |
| 760 | 75 virtual void Lock() |
| 76 { | |
| 77 lock_.lock(); | |
| 78 } | |
| 79 | |
| 80 virtual void Unlock() | |
| 81 { | |
| 82 lock_.unlock(); | |
| 83 } | |
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84 |
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85 public: |
| 2223 | 86 explicit WriterLockable(boost::shared_mutex& lock) : lock_(lock) |
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87 { |
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88 } |
| 760 | 89 }; |
| 90 } | |
| 91 | |
| 92 struct ReaderWriterLock::PImpl | |
| 93 { | |
| 94 boost::shared_mutex lock_; | |
| 95 ReaderLockable reader_; | |
| 96 WriterLockable writer_; | |
| 97 | |
| 98 PImpl() : reader_(lock_), writer_(lock_) | |
| 99 { | |
| 100 } | |
| 101 }; | |
| 102 | |
| 103 | |
| 104 ReaderWriterLock::ReaderWriterLock() | |
| 105 { | |
| 106 pimpl_ = new PImpl; | |
| 107 } | |
| 108 | |
| 109 | |
| 110 ReaderWriterLock::~ReaderWriterLock() | |
| 111 { | |
| 112 delete pimpl_; | |
| 113 } | |
| 114 | |
| 115 | |
| 116 ILockable& ReaderWriterLock::ForReader() | |
| 117 { | |
| 118 return pimpl_->reader_; | |
| 119 } | |
| 120 | |
| 121 | |
| 122 ILockable& ReaderWriterLock::ForWriter() | |
| 123 { | |
| 124 return pimpl_->writer_; | |
| 125 } | |
| 126 } |