Mercurial > hg > orthanc-wsi

annotate ViewerPlugin/DicomPyramidCache.cpp @ 237:c2863f5204a8

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fix build because of update in Orthanc framework
author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 05 May 2021 14:34:07 +0200
parents 1e864138f0da
children 49f647ed1b4c
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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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) 2017-2021 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU Affero General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Affero General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Affero General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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22 #include "../Framework/PrecompiledHeadersWSI.h"
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23 #include "DicomPyramidCache.h"
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24
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25 #include <Compatibility.h> // For std::unique_ptr
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26
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27 #include <cassert>
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29 namespace OrthancWSI
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30 {
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31 DicomPyramid* DicomPyramidCache::GetCachedPyramid(const std::string& seriesId)
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32 {
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33 // Mutex is assumed to be locked
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34 DicomPyramid* pyramid = NULL;
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35
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36 // Is the series of interest already cached as a pyramid?
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37 if (cache_.Contains(seriesId, pyramid))
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38 {
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39 if (pyramid == NULL)
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40 {
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41 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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42 }
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43
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44 // Tag the series as the most recently used
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45 cache_.MakeMostRecent(seriesId);
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46 }
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47
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48 return pyramid;
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49 }
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51
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52 DicomPyramid& DicomPyramidCache::GetPyramid(const std::string& seriesId,
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53 boost::mutex::scoped_lock& lock)
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54 {
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55 // Mutex is assumed to be locked
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56
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57 {
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58 DicomPyramid* pyramid = GetCachedPyramid(seriesId);
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59 if (pyramid != NULL)
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60 {
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61 return *pyramid;
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62 }
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63 }
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64
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65 // Unlock the mutex to construct the pyramid (this is a
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66 // time-consuming operation, we don't want it to block other clients)
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67 lock.unlock();
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68
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69 std::unique_ptr<DicomPyramid> pyramid
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70 (new DicomPyramid(orthanc_, seriesId, true /* use metadata cache */));
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72 {
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73 // The pyramid is constructed: Store it into the cache
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74 lock.lock();
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75
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76 DicomPyramid* cached = GetCachedPyramid(seriesId);
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77 if (cached != NULL)
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78 {
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79 // The pyramid was already constructed by another request in
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80 // between, reuse the cached value (the auto_ptr destroys
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81 // the just-constructed pyramid)
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82 return *cached;
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83 }
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84
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85 if (cache_.GetSize() == maxSize_)
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86 {
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87 // The cache has grown too large: First delete the least
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88 // recently used entry
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89 DicomPyramid* oldest = NULL;
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90 cache_.RemoveOldest(oldest);
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91
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92 if (oldest == NULL)
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93 {
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94 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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95 }
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96 else
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97 {
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98 delete oldest;
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99 }
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100 }
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101
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102 // Now we have at least one free entry in the cache
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103 assert(cache_.GetSize() < maxSize_);
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104
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105 // Add a new element to the cache and make it the most
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106 // recently used entry
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107 DicomPyramid* payload = pyramid.release();
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108 cache_.Add(seriesId, payload);
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109 return *payload;
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110 }
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111 }
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112
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113
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114 DicomPyramidCache::DicomPyramidCache(OrthancStone::IOrthancConnection& orthanc,
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115 size_t maxSize) :
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116 orthanc_(orthanc),
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117 maxSize_(maxSize)
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118 {
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119 }
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120
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121
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122 DicomPyramidCache::~DicomPyramidCache()
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123 {
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124 while (!cache_.IsEmpty())
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125 {
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126 DicomPyramid* pyramid = NULL;
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127 std::string seriesId = cache_.RemoveOldest(pyramid);
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128
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129 if (pyramid != NULL)
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130 {
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131 delete pyramid;
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132 }
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133 }
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134 }
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135
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136
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137 void DicomPyramidCache::Invalidate(const std::string& seriesId)
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138 {
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139 boost::mutex::scoped_lock lock(mutex_);
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140
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141 if (cache_.Contains(seriesId))
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142 {
199
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143 std::unique_ptr<DicomPyramid> pyramid(cache_.Invalidate(seriesId));
73
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144
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145 if (pyramid.get() == NULL)
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146 {
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147 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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148 }
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149 }
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150 }
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151
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152
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153 DicomPyramidCache::Locker::Locker(DicomPyramidCache& cache,
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154 const std::string& seriesId) :
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155 lock_(cache.mutex_),
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156 pyramid_(cache.GetPyramid(seriesId, lock_))
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157 {
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158 }
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159 }