Mercurial > hg > orthanc
comparison OrthancFramework/Sources/Cache/MemoryCache.cpp @ 4044:d25f4c0fa160 framework
splitting code into OrthancFramework and OrthancServer
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Wed, 10 Jun 2020 20:30:34 +0200 |
parents | Core/Cache/MemoryCache.cpp@2a170a8f1faf |
children | bf7b9edf6b81 |
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4043:6c6239aec462 | 4044:d25f4c0fa160 |
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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) 2017-2020 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 "MemoryCache.h" | |
36 | |
37 #include "../Logging.h" | |
38 | |
39 namespace Orthanc | |
40 { | |
41 namespace Deprecated | |
42 { | |
43 MemoryCache::Page& MemoryCache::Load(const std::string& id) | |
44 { | |
45 // Reuse the cache entry if it already exists | |
46 Page* p = NULL; | |
47 if (index_.Contains(id, p)) | |
48 { | |
49 VLOG(1) << "Reusing a cache page"; | |
50 assert(p != NULL); | |
51 index_.MakeMostRecent(id); | |
52 return *p; | |
53 } | |
54 | |
55 // The id is not in the cache yet. Make some room if the cache | |
56 // is full. | |
57 if (index_.GetSize() == cacheSize_) | |
58 { | |
59 VLOG(1) << "Dropping the oldest cache page"; | |
60 index_.RemoveOldest(p); | |
61 delete p; | |
62 } | |
63 | |
64 // Create a new cache page | |
65 std::unique_ptr<Page> result(new Page); | |
66 result->id_ = id; | |
67 result->content_.reset(provider_.Provide(id)); | |
68 | |
69 // Add the newly create page to the cache | |
70 VLOG(1) << "Registering new data in a cache page"; | |
71 p = result.release(); | |
72 index_.Add(id, p); | |
73 return *p; | |
74 } | |
75 | |
76 MemoryCache::MemoryCache(ICachePageProvider& provider, | |
77 size_t cacheSize) : | |
78 provider_(provider), | |
79 cacheSize_(cacheSize) | |
80 { | |
81 } | |
82 | |
83 void MemoryCache::Invalidate(const std::string& id) | |
84 { | |
85 Page* p = NULL; | |
86 if (index_.Contains(id, p)) | |
87 { | |
88 VLOG(1) << "Invalidating a cache page"; | |
89 assert(p != NULL); | |
90 delete p; | |
91 index_.Invalidate(id); | |
92 } | |
93 } | |
94 | |
95 MemoryCache::~MemoryCache() | |
96 { | |
97 while (!index_.IsEmpty()) | |
98 { | |
99 Page* element = NULL; | |
100 index_.RemoveOldest(element); | |
101 assert(element != NULL); | |
102 delete element; | |
103 } | |
104 } | |
105 | |
106 IDynamicObject& MemoryCache::Access(const std::string& id) | |
107 { | |
108 return *Load(id).content_; | |
109 } | |
110 } | |
111 } |