760
|
1 /**
|
|
2 * Orthanc - A Lightweight, RESTful DICOM Store
|
|
3 * Copyright (C) 2012-2014 Medical Physics Department, CHU of Liege,
|
|
4 * Belgium
|
|
5 *
|
|
6 * This program is free software: you can redistribute it and/or
|
|
7 * modify it under the terms of the GNU General Public License as
|
|
8 * published by the Free Software Foundation, either version 3 of the
|
|
9 * License, or (at your option) any later version.
|
|
10 *
|
|
11 * In addition, as a special exception, the copyright holders of this
|
|
12 * program give permission to link the code of its release with the
|
|
13 * OpenSSL project's "OpenSSL" library (or with modified versions of it
|
|
14 * that use the same license as the "OpenSSL" library), and distribute
|
|
15 * the linked executables. You must obey the GNU General Public License
|
|
16 * in all respects for all of the code used other than "OpenSSL". If you
|
|
17 * modify file(s) with this exception, you may extend this exception to
|
|
18 * your version of the file(s), but you are not obligated to do so. If
|
|
19 * you do not wish to do so, delete this exception statement from your
|
|
20 * version. If you delete this exception statement from all source files
|
|
21 * in the program, then also delete it here.
|
|
22 *
|
|
23 * This program is distributed in the hope that it will be useful, but
|
|
24 * WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
26 * General Public License for more details.
|
|
27 *
|
|
28 * You should have received a copy of the GNU General Public License
|
|
29 * along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
30 **/
|
|
31
|
|
32
|
|
33 #include "ReaderWriterLock.h"
|
|
34
|
|
35 #include <boost/thread/shared_mutex.hpp>
|
|
36
|
|
37 namespace Orthanc
|
|
38 {
|
|
39 namespace
|
|
40 {
|
|
41 // Anonymous namespace to avoid clashes between compilation
|
|
42 // modules.
|
|
43
|
|
44 class ReaderLockable : public ILockable
|
|
45 {
|
|
46 private:
|
|
47 boost::shared_mutex& lock_;
|
|
48
|
|
49 public:
|
|
50 ReaderLockable(boost::shared_mutex& lock) : lock_(lock)
|
|
51 {
|
|
52 }
|
|
53
|
|
54 virtual void Lock()
|
|
55 {
|
|
56 lock_.lock_shared();
|
|
57 }
|
|
58
|
|
59 virtual void Unlock()
|
|
60 {
|
|
61 lock_.unlock_shared();
|
|
62 }
|
|
63 };
|
|
64
|
|
65
|
|
66 class WriterLockable : public ILockable
|
|
67 {
|
|
68 private:
|
|
69 boost::shared_mutex& lock_;
|
|
70
|
|
71 public:
|
|
72 WriterLockable(boost::shared_mutex& lock) : lock_(lock)
|
|
73 {
|
|
74 }
|
|
75
|
|
76 virtual void Lock()
|
|
77 {
|
|
78 lock_.lock();
|
|
79 }
|
|
80
|
|
81 virtual void Unlock()
|
|
82 {
|
|
83 lock_.unlock();
|
|
84 }
|
|
85 };
|
|
86 }
|
|
87
|
|
88 struct ReaderWriterLock::PImpl
|
|
89 {
|
|
90 boost::shared_mutex lock_;
|
|
91 ReaderLockable reader_;
|
|
92 WriterLockable writer_;
|
|
93
|
|
94 PImpl() : reader_(lock_), writer_(lock_)
|
|
95 {
|
|
96 }
|
|
97 };
|
|
98
|
|
99
|
|
100 ReaderWriterLock::ReaderWriterLock()
|
|
101 {
|
|
102 pimpl_ = new PImpl;
|
|
103 }
|
|
104
|
|
105
|
|
106 ReaderWriterLock::~ReaderWriterLock()
|
|
107 {
|
|
108 delete pimpl_;
|
|
109 }
|
|
110
|
|
111
|
|
112 ILockable& ReaderWriterLock::ForReader()
|
|
113 {
|
|
114 return pimpl_->reader_;
|
|
115 }
|
|
116
|
|
117
|
|
118 ILockable& ReaderWriterLock::ForWriter()
|
|
119 {
|
|
120 return pimpl_->writer_;
|
|
121 }
|
|
122 }
|