--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/OrthancFramework/Sources/DicomNetworking/TimeoutDicomConnectionManager.h	Wed Jun 10 20:30:34 2020 +0200
@@ -0,0 +1,104 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2020 Osimis S.A., Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * In addition, as a special exception, the copyright holders of this
+ * program give permission to link the code of its release with the
+ * OpenSSL project's "OpenSSL" library (or with modified versions of it
+ * that use the same license as the "OpenSSL" library), and distribute
+ * the linked executables. You must obey the GNU General Public License
+ * in all respects for all of the code used other than "OpenSSL". If you
+ * modify file(s) with this exception, you may extend this exception to
+ * your version of the file(s), but you are not obligated to do so. If
+ * you do not wish to do so, delete this exception statement from your
+ * version. If you delete this exception statement from all source files
+ * in the program, then also delete it here.
+ * 
+ * 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#pragma once
+
+#if !defined(ORTHANC_ENABLE_DCMTK_NETWORKING)
+#  error The macro ORTHANC_ENABLE_DCMTK_NETWORKING must be defined
+#endif
+
+#if ORTHANC_ENABLE_DCMTK_NETWORKING != 1
+#  error The macro ORTHANC_ENABLE_DCMTK_NETWORKING must be 1 to use this file
+#endif
+
+
+#include "../Compatibility.h"
+#include "DicomStoreUserConnection.h"
+
+#include <boost/date_time/posix_time/posix_time.hpp>
+#include <boost/thread/mutex.hpp>
+
+namespace Orthanc
+{
+  /**
+   * This class corresponds to a singleton to a DICOM SCU connection.
+   **/
+  class TimeoutDicomConnectionManager : public boost::noncopyable
+  {
+  private:
+    boost::mutex                               mutex_;
+    std::unique_ptr<DicomStoreUserConnection>  connection_;
+    boost::posix_time::ptime                   lastUse_;
+    boost::posix_time::time_duration           timeout_;
+
+    // Mutex must be locked
+    void TouchInternal();
+
+    // Mutex must be locked
+    void OpenInternal(const std::string& localAet,
+                      const RemoteModalityParameters& remote);
+
+    // Mutex must be locked
+    void CloseInternal();
+
+  public:
+    class Lock : public boost::noncopyable
+    {
+    private:
+      TimeoutDicomConnectionManager&  that_;
+      boost::mutex::scoped_lock       lock_;
+
+    public:
+      Lock(TimeoutDicomConnectionManager& that,
+           const std::string& localAet,
+           const RemoteModalityParameters& remote);
+      
+      ~Lock();
+
+      DicomStoreUserConnection& GetConnection();
+    };
+
+    TimeoutDicomConnectionManager() :
+      timeout_(boost::posix_time::milliseconds(1000))
+    {
+    }
+
+    void SetInactivityTimeout(unsigned int milliseconds);
+
+    unsigned int GetInactivityTimeout();  // In milliseconds
+
+    void Close();
+
+    void CloseIfInactive();
+  };
+}