Mercurial > hg > orthanc
comparison Core/MultiThreading/ReaderWriterLock.cpp @ 760:b2a62f22fbe8
lock abstraction
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Tue, 22 Apr 2014 13:36:51 +0200 |
parents | |
children | 3f946e5c3802 |
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757:40d09221077a | 760:b2a62f22fbe8 |
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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 } |