--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/Deprecated/Toolbox/DownloadStack.h	Tue May 21 14:27:35 2019 +0200
@@ -0,0 +1,60 @@
+/**
+ * Stone of Orthanc
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2019 Osimis S.A., Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Affero 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
+ * Affero General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#pragma once
+
+#include <vector>
+#include <boost/noncopyable.hpp>
+
+namespace Deprecated
+{
+  class DownloadStack : public boost::noncopyable
+  {
+  private:
+    static const int NIL = -1;
+
+    // This is a doubly-linked list
+    struct Node
+    {
+      int   next_;
+      int   prev_;
+      bool  dequeued_;
+    };
+
+    std::vector<Node>   nodes_;
+    int                 firstNode_;
+
+    bool CheckInvariants() const;
+
+    void SetTopNodeInternal(unsigned int value);  
+
+  public:
+    DownloadStack(unsigned int size);
+
+    ~DownloadStack();
+
+    bool Pop(unsigned int& value);
+
+    void SetTopNode(unsigned int value);  
+
+    void SetTopNodePermissive(int value);
+  };
+}