Mercurial > hg > orthanc-wsi

annotate ViewerPlugin/DicomPyramidCache.cpp @ 275:801790c81f20 iiif

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configuration options of IIIF
author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 12 Jul 2023 12:35:04 +0200
parents c72fbdecdc38
children 7020852a8fa9
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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) 2017-2023 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2023 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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7 *
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8 * This program is free software: you can redistribute it and/or
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9 * modify it under the terms of the GNU Affero General Public License
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10 * as published by the Free Software Foundation, either version 3 of
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11 * the License, or (at your option) any later version.
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12 *
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13 * This program is distributed in the hope that it will be useful, but
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 * Affero General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU Affero General Public License
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19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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20 **/
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23 #include "../Framework/PrecompiledHeadersWSI.h"
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24 #include "DicomPyramidCache.h"
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25
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26 #include "OrthancPluginConnection.h"
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28 #include <Compatibility.h> // For std::unique_ptr
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29
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30 #include <cassert>
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32 static std::unique_ptr<OrthancWSI::DicomPyramidCache> singleton_;
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33
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35 namespace OrthancWSI
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36 {
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37 DicomPyramid* DicomPyramidCache::GetCachedPyramid(const std::string& seriesId)
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38 {
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39 // Mutex is assumed to be locked
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40 DicomPyramid* pyramid = NULL;
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41
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42 // Is the series of interest already cached as a pyramid?
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43 if (cache_.Contains(seriesId, pyramid))
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44 {
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45 if (pyramid == NULL)
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46 {
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47 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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48 }
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49
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50 // Tag the series as the most recently used
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51 cache_.MakeMostRecent(seriesId);
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52 }
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53
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54 return pyramid;
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55 }
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57
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58 DicomPyramid& DicomPyramidCache::GetPyramid(const std::string& seriesId,
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59 boost::mutex::scoped_lock& lock)
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60 {
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61 // Mutex is assumed to be locked
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63 {
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64 DicomPyramid* pyramid = GetCachedPyramid(seriesId);
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65 if (pyramid != NULL)
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66 {
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67 return *pyramid;
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68 }
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69 }
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70
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71 // Unlock the mutex to construct the pyramid (this is a
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72 // time-consuming operation, we don't want it to block other clients)
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73 lock.unlock();
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74
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75 assert(orthanc_.get() != NULL);
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76 std::unique_ptr<DicomPyramid> pyramid
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77 (new DicomPyramid(*orthanc_, seriesId, true /* use metadata cache */));
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78
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79 {
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80 // The pyramid is constructed: Store it into the cache
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81 lock.lock();
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82
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83 DicomPyramid* cached = GetCachedPyramid(seriesId);
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84 if (cached != NULL)
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85 {
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86 // The pyramid was already constructed by another request in
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87 // between, reuse the cached value (the auto_ptr destroys
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88 // the just-constructed pyramid)
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89 return *cached;
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90 }
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91
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92 if (cache_.GetSize() == maxSize_)
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93 {
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94 // The cache has grown too large: First delete the least
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95 // recently used entry
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96 DicomPyramid* oldest = NULL;
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97 cache_.RemoveOldest(oldest);
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98
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99 if (oldest == NULL)
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100 {
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101 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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102 }
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103 else
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104 {
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105 delete oldest;
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106 }
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107 }
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108
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109 // Now we have at least one free entry in the cache
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110 assert(cache_.GetSize() < maxSize_);
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111
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112 // Add a new element to the cache and make it the most
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113 // recently used entry
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114 DicomPyramid* payload = pyramid.release();
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115 cache_.Add(seriesId, payload);
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116 return *payload;
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117 }
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118 }
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119
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120
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121 DicomPyramidCache::DicomPyramidCache(OrthancStone::IOrthancConnection* orthanc /* takes ownership */,
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122 size_t maxSize) :
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123 orthanc_(orthanc),
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124 maxSize_(maxSize)
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125 {
261
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126 if (orthanc == NULL)
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127 {
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128 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
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129 }
73
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130 }
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131
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132
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133 DicomPyramidCache::~DicomPyramidCache()
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134 {
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135 while (!cache_.IsEmpty())
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136 {
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137 DicomPyramid* pyramid = NULL;
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138 std::string seriesId = cache_.RemoveOldest(pyramid);
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139
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140 if (pyramid != NULL)
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141 {
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142 delete pyramid;
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143 }
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144 }
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145 }
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146
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147
261
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148 void DicomPyramidCache::InitializeInstance(size_t maxSize)
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149 {
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150 if (singleton_.get() == NULL)
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151 {
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152 singleton_.reset(new DicomPyramidCache(new OrthancWSI::OrthancPluginConnection, maxSize));
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153 }
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154 else
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155 {
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156 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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157 }
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158 }
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159
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160
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161 void DicomPyramidCache::FinalizeInstance()
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162 {
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163 if (singleton_.get() == NULL)
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164 {
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165 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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166 }
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167 else
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168 {
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169 singleton_.reset(NULL);
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170 }
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171 }
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172
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173
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174 DicomPyramidCache& DicomPyramidCache::GetInstance()
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175 {
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176 if (singleton_.get() == NULL)
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177 {
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178 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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179 }
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180 else
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181 {
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182 return *singleton_;
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183 }
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184 }
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185
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186
73
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187 void DicomPyramidCache::Invalidate(const std::string& seriesId)
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188 {
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189 boost::mutex::scoped_lock lock(mutex_);
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190
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191 if (cache_.Contains(seriesId))
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192 {
199
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diff changeset
193 std::unique_ptr<DicomPyramid> pyramid(cache_.Invalidate(seriesId));
73
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194
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195 if (pyramid.get() == NULL)
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196 {
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197 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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198 }
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199 }
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parents:
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200 }
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parents:
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201
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parents:
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202
261
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203 DicomPyramidCache::Locker::Locker(const std::string& seriesId) :
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204 cache_(DicomPyramidCache::GetInstance()),
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205 lock_(cache_.mutex_),
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206 pyramid_(cache_.GetPyramid(seriesId, lock_))
73
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
207 {
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
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208 }
a8c90aa32ca6 LRU caching of pyramids, OrthancWSIClearCache script
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parents:
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209 }