--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/OrthancFramework/Sources/DicomParsing/ParsedDicomCache.h	Tue Jan 19 16:11:23 2021 +0100
@@ -0,0 +1,77 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2021 Osimis S.A., Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program. If not, see
+ * <http://www.gnu.org/licenses/>.
+ **/
+
+
+#pragma once
+
+#include "../Cache/MemoryObjectCache.h"
+#include "ParsedDicomFile.h"
+
+namespace Orthanc
+{
+  class ParsedDicomCache : public boost::noncopyable
+  {
+  private:
+    class Item;
+
+    boost::mutex                        mutex_;
+    size_t                              cacheSize_;
+    std::unique_ptr<MemoryObjectCache>  cache_;
+    std::unique_ptr<ParsedDicomFile>    largeDicom_;
+    std::string                         largeId_;
+    size_t                              largeSize_;
+
+  public:
+    explicit ParsedDicomCache(size_t size);
+
+    size_t GetCurrentSize();  // For unit tests only
+
+    void Invalidate(const std::string& id);
+
+    void Acquire(const std::string& id,
+                 ParsedDicomFile* dicom,  // Takes ownership
+                 size_t fileSize);
+
+    class Accessor : public boost::noncopyable
+    {
+    private:
+      boost::mutex::scoped_lock  lock_;
+      std::string                id_;
+      ParsedDicomFile*           file_;
+      size_t                     fileSize_;
+
+      std::unique_ptr<MemoryObjectCache::Accessor>  accessor_;
+      
+    public:
+      Accessor(ParsedDicomCache& that,
+               const std::string& id);
+
+      bool IsValid() const
+      {
+        return file_ != NULL;
+      }
+
+      ParsedDicomFile& GetDicom() const;
+
+      size_t GetFileSize() const;
+    };
+  };
+}