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comparison Resources/Graveyard/Multithreading/ReaderWriterLock.cpp @ 2610:3ff4c50647ea jobs

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moving the old scheduler to the graveyard
author Sebastien Jodogne <s.jodogne@gmail.com>
date Sat, 19 May 2018 16:40:26 +0200
parents Resources/Graveyard/ReaderWriterLock.cpp@3caca43371f5
children 4e43e67f8ecf
comparison
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2609:f7a84b551ee4 2610:3ff4c50647ea
1 /**
2 * Orthanc - A Lightweight, RESTful DICOM Store
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
4 * Department, University Hospital of Liege, Belgium
5 * Copyright (C) 2017-2018 Osimis S.A., Belgium
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
34 #include "../PrecompiledHeaders.h"
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
51 protected:
52 virtual void Lock()
53 {
54 lock_.lock_shared();
55 }
56
57 virtual void Unlock()
58 {
59 lock_.unlock_shared();
60 }
61
62 public:
63 explicit ReaderLockable(boost::shared_mutex& lock) : lock_(lock)
64 {
65 }
66 };
67
68
69 class WriterLockable : public ILockable
70 {
71 private:
72 boost::shared_mutex& lock_;
73
74 protected:
75 virtual void Lock()
76 {
77 lock_.lock();
78 }
79
80 virtual void Unlock()
81 {
82 lock_.unlock();
83 }
84
85 public:
86 explicit WriterLockable(boost::shared_mutex& lock) : lock_(lock)
87 {
88 }
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 }