--- a/Applications/ApplicationToolbox.cpp	Tue Jul 17 09:55:24 2018 +0200
+++ b/Applications/ApplicationToolbox.cpp	Tue Jul 17 10:06:39 2018 +0200
@@ -22,13 +22,14 @@
 #include "ApplicationToolbox.h"
 
 #include "../Framework/Inputs/OpenSlideLibrary.h"
+#include "../Framework/MultiThreading/BagOfTasksProcessor.h"
 
 #include <Core/DicomParsing/FromDcmtkBridge.h>
 #include <Core/HttpClient.h>
 #include <Core/Logging.h>
-#include <Core/MultiThreading/BagOfTasksProcessor.h>
 #include <Core/OrthancException.h>
 #include <Core/SystemToolbox.h>
+#include <Core/Toolbox.h>
 
 #include <boost/filesystem.hpp>
 #include <boost/lexical_cast.hpp>
@@ -63,7 +64,7 @@
     void GlobalInitialize()
     {
       Orthanc::Logging::Initialize();
-      Orthanc::HttpClient::InitializeOpenSsl();
+      Orthanc::Toolbox::InitializeOpenSsl();
       Orthanc::HttpClient::GlobalInitialize();
       Orthanc::FromDcmtkBridge::InitializeDictionary(false /* don't load private dictionary */);
       assert(DisplayPerformanceWarning());
@@ -74,7 +75,7 @@
     {
       OrthancWSI::OpenSlideLibrary::Finalize();
       Orthanc::HttpClient::GlobalFinalize();
-      Orthanc::HttpClient::FinalizeOpenSsl();
+      Orthanc::Toolbox::FinalizeOpenSsl();
     }
 
 

--- a/Applications/ApplicationToolbox.h	Tue Jul 17 09:55:24 2018 +0200
+++ b/Applications/ApplicationToolbox.h	Tue Jul 17 10:06:39 2018 +0200
@@ -21,7 +21,8 @@
 
 #pragma once
 
-#include <Core/MultiThreading/BagOfTasks.h>
+#include "../Framework/MultiThreading/BagOfTasks.h"
+
 #include <Core/WebServiceParameters.h>
 
 #include <string>

--- a/Applications/CMakeLists.txt	Tue Jul 17 09:55:24 2018 +0200
+++ b/Applications/CMakeLists.txt	Tue Jul 17 10:06:39 2018 +0200
@@ -100,14 +100,15 @@
   ${ORTHANC_WSI_DIR}/Framework/Inputs/TiledPyramidStatistics.cpp
   ${ORTHANC_WSI_DIR}/Framework/Jpeg2000Reader.cpp
   ${ORTHANC_WSI_DIR}/Framework/Jpeg2000Writer.cpp
-  ${ORTHANC_WSI_DIR}/Framework/Targets/FolderTarget.cpp
-  ${ORTHANC_WSI_DIR}/Framework/Targets/OrthancTarget.cpp
+  ${ORTHANC_WSI_DIR}/Framework/MultiThreading/BagOfTasksProcessor.cpp
   ${ORTHANC_WSI_DIR}/Framework/Outputs/DicomPyramidWriter.cpp
   ${ORTHANC_WSI_DIR}/Framework/Outputs/HierarchicalTiffWriter.cpp
   ${ORTHANC_WSI_DIR}/Framework/Outputs/InMemoryTiledImage.cpp
   ${ORTHANC_WSI_DIR}/Framework/Outputs/MultiframeDicomWriter.cpp
   ${ORTHANC_WSI_DIR}/Framework/Outputs/PyramidWriterBase.cpp
   ${ORTHANC_WSI_DIR}/Framework/Outputs/TruncatedPyramidWriter.cpp
+  ${ORTHANC_WSI_DIR}/Framework/Targets/FolderTarget.cpp
+  ${ORTHANC_WSI_DIR}/Framework/Targets/OrthancTarget.cpp
   )
 
 EmbedResources(

--- a/Applications/Dicomizer.cpp	Tue Jul 17 09:55:24 2018 +0200
+++ b/Applications/Dicomizer.cpp	Tue Jul 17 10:06:39 2018 +0200
@@ -29,12 +29,12 @@
 #include "../Framework/Inputs/TiledJpegImage.h"
 #include "../Framework/Inputs/TiledPngImage.h"
 #include "../Framework/Inputs/TiledPyramidStatistics.h"
+#include "../Framework/MultiThreading/BagOfTasksProcessor.h"
 #include "../Framework/Outputs/DicomPyramidWriter.h"
 #include "../Framework/Outputs/TruncatedPyramidWriter.h"
 
 #include <Core/DicomParsing/FromDcmtkBridge.h>
 #include <Core/Logging.h>
-#include <Core/MultiThreading/BagOfTasksProcessor.h>
 #include <Core/OrthancException.h>
 #include <Core/SystemToolbox.h>
 

--- a/Framework/Algorithms/ReconstructPyramidCommand.h	Tue Jul 17 09:55:24 2018 +0200
+++ b/Framework/Algorithms/ReconstructPyramidCommand.h	Tue Jul 17 10:06:39 2018 +0200
@@ -23,7 +23,7 @@
 
 #include "PyramidReader.h"
 #include "../Outputs/IPyramidWriter.h"
-#include <Core/MultiThreading/BagOfTasks.h>
+#include "../MultiThreading/BagOfTasks.h"
 
 
 namespace OrthancWSI

--- a/Framework/Algorithms/TranscodeTileCommand.h	Tue Jul 17 09:55:24 2018 +0200
+++ b/Framework/Algorithms/TranscodeTileCommand.h	Tue Jul 17 10:06:39 2018 +0200
@@ -23,8 +23,7 @@
 
 #include "PyramidReader.h"
 #include "../Outputs/IPyramidWriter.h"
-
-#include <Core/MultiThreading/BagOfTasks.h>
+#include "../MultiThreading/BagOfTasks.h"
 
 namespace OrthancWSI
 {

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/MultiThreading/BagOfTasks.h	Tue Jul 17 10:06:39 2018 +0200
@@ -0,0 +1,72 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2018 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 <Core/ICommand.h>
+
+#include <list>
+#include <cstddef>
+
+namespace Orthanc
+{
+  class BagOfTasks : public boost::noncopyable
+  {
+  private:
+    typedef std::list<ICommand*>  Tasks;
+
+    Tasks  tasks_;
+
+  public:
+    ~BagOfTasks()
+    {
+      for (Tasks::iterator it = tasks_.begin(); it != tasks_.end(); ++it)
+      {
+        delete *it;
+      }
+    }
+
+    ICommand* Pop()
+    {
+      ICommand* task = tasks_.front();
+      tasks_.pop_front();
+      return task;
+    }
+
+    void Push(ICommand* task)   // Takes ownership
+    {
+      if (task != NULL)
+      {
+        tasks_.push_back(task);
+      }
+    }
+
+    size_t GetSize() const
+    {
+      return tasks_.size();
+    }
+
+    bool IsEmpty() const
+    {
+      return tasks_.empty();
+    }
+  };
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/MultiThreading/BagOfTasksProcessor.cpp	Tue Jul 17 10:06:39 2018 +0200
@@ -0,0 +1,264 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2018 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/>.
+ **/
+
+
+#include "BagOfTasksProcessor.h"
+
+#include <Core/Logging.h>
+#include <Core/OrthancException.h>
+
+#include <stdio.h>
+
+namespace Orthanc
+{
+  class BagOfTasksProcessor::Task : public IDynamicObject
+  {
+  private:
+    uint64_t                 bag_;
+    std::auto_ptr<ICommand>  command_;
+
+  public:
+    Task(uint64_t  bag,
+         ICommand* command) :
+      bag_(bag),
+      command_(command)
+    {
+    }
+
+    bool Execute()
+    {
+      try
+      {
+        return command_->Execute();
+      }
+      catch (OrthancException& e)
+      {
+        LOG(ERROR) << "Exception while processing a bag of tasks: " << e.What();
+        return false;
+      }
+      catch (std::runtime_error& e)
+      {
+        LOG(ERROR) << "Runtime exception while processing a bag of tasks: " << e.what();
+        return false;
+      }
+      catch (...)
+      {
+        LOG(ERROR) << "Native exception while processing a bag of tasks";
+        return false;
+      }
+    }
+
+    uint64_t GetBag()
+    {
+      return bag_;
+    }
+  };
+
+
+  void BagOfTasksProcessor::SignalProgress(Task& task,
+                                           Bag& bag)
+  {
+    assert(bag.done_ < bag.size_);
+
+    bag.done_ += 1;
+
+    if (bag.done_ == bag.size_)
+    {
+      exitStatus_[task.GetBag()] = (bag.status_ == BagStatus_Running);
+      bagFinished_.notify_all();
+    }
+  }
+
+  void BagOfTasksProcessor::Worker(BagOfTasksProcessor* that)
+  {
+    while (that->continue_)
+    {
+      std::auto_ptr<IDynamicObject> obj(that->queue_.Dequeue(100));
+      if (obj.get() != NULL)
+      {
+        Task& task = *dynamic_cast<Task*>(obj.get());
+
+        {
+          boost::mutex::scoped_lock lock(that->mutex_);
+
+          Bags::iterator bag = that->bags_.find(task.GetBag());
+          assert(bag != that->bags_.end());
+          assert(bag->second.done_ < bag->second.size_);
+
+          if (bag->second.status_ != BagStatus_Running)
+          {
+            // Do not execute this task, as its parent bag of tasks
+            // has failed or is tagged as canceled
+            that->SignalProgress(task, bag->second);
+            continue;
+          }
+        }
+
+        bool success = task.Execute();
+
+        {
+          boost::mutex::scoped_lock lock(that->mutex_);
+
+          Bags::iterator bag = that->bags_.find(task.GetBag());
+          assert(bag != that->bags_.end());
+
+          if (!success)
+          {
+            bag->second.status_ = BagStatus_Failed;
+          }
+
+          that->SignalProgress(task, bag->second);
+        }
+      }
+    }
+  }
+
+
+  void BagOfTasksProcessor::Cancel(int64_t bag)
+  {
+    boost::mutex::scoped_lock  lock(mutex_);
+
+    Bags::iterator it = bags_.find(bag);
+    if (it != bags_.end())
+    {
+      it->second.status_ = BagStatus_Canceled;
+    }
+  }
+
+
+  bool BagOfTasksProcessor::Join(int64_t bag)
+  {
+    boost::mutex::scoped_lock  lock(mutex_);
+
+    while (continue_)
+    {
+      ExitStatus::iterator it = exitStatus_.find(bag);
+      if (it == exitStatus_.end())  // The bag is still running
+      {
+        bagFinished_.wait(lock);
+      }
+      else
+      {
+        bool status = it->second;
+        exitStatus_.erase(it);
+        return status;
+      }
+    }
+
+    return false;   // The processor is stopping
+  }
+
+
+  float BagOfTasksProcessor::GetProgress(int64_t bag)
+  {
+    boost::mutex::scoped_lock  lock(mutex_);
+
+    Bags::const_iterator it = bags_.find(bag);
+    if (it == bags_.end())
+    {
+      // The bag of tasks has finished
+      return 1.0f;
+    }
+    else
+    {
+      return (static_cast<float>(it->second.done_) / 
+              static_cast<float>(it->second.size_));
+    }
+  }
+
+
+  bool BagOfTasksProcessor::Handle::Join()
+  {
+    if (hasJoined_)
+    {
+      return status_;
+    }
+    else
+    {
+      status_ = that_.Join(bag_);
+      hasJoined_ = true;
+      return status_;
+    }
+  }
+
+
+  BagOfTasksProcessor::BagOfTasksProcessor(size_t countThreads) : 
+    countBags_(0),
+    continue_(true)
+  {
+    if (countThreads == 0)
+    {
+      throw OrthancException(ErrorCode_ParameterOutOfRange);
+    }
+
+    threads_.resize(countThreads);
+
+    for (size_t i = 0; i < threads_.size(); i++)
+    {
+      threads_[i] = new boost::thread(Worker, this);
+    }
+  }
+
+
+  BagOfTasksProcessor::~BagOfTasksProcessor()
+  {
+    continue_ = false;
+
+    bagFinished_.notify_all();   // Wakes up all the pending "Join()"
+
+    for (size_t i = 0; i < threads_.size(); i++)
+    {
+      if (threads_[i])
+      {
+        if (threads_[i]->joinable())
+        {
+          threads_[i]->join();
+        }
+
+        delete threads_[i];
+        threads_[i] = NULL;
+      }
+    }
+  }
+
+
+  BagOfTasksProcessor::Handle* BagOfTasksProcessor::Submit(BagOfTasks& tasks)
+  {
+    if (tasks.GetSize() == 0)
+    {
+      return new Handle(*this, 0, true);
+    }
+
+    boost::mutex::scoped_lock lock(mutex_);
+
+    uint64_t id = countBags_;
+    countBags_ += 1;
+
+    Bag bag(tasks.GetSize());
+    bags_[id] = bag;
+
+    while (!tasks.IsEmpty())
+    {
+      queue_.Enqueue(new Task(id, tasks.Pop()));
+    }
+
+    return new Handle(*this, id, false);
+  }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/MultiThreading/BagOfTasksProcessor.h	Tue Jul 17 10:06:39 2018 +0200
@@ -0,0 +1,139 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2018 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 "BagOfTasks.h"
+
+#include <Core/MultiThreading/SharedMessageQueue.h>
+
+#include <stdint.h>
+#include <map>
+
+namespace Orthanc
+{
+  class BagOfTasksProcessor : public boost::noncopyable
+  {
+  private:
+    enum BagStatus
+    {
+      BagStatus_Running,
+      BagStatus_Canceled,
+      BagStatus_Failed
+    };
+
+
+    struct Bag
+    {
+      size_t    size_;
+      size_t    done_;
+      BagStatus status_;
+
+      Bag() :
+        size_(0),
+        done_(0),
+        status_(BagStatus_Failed)
+      {
+      }
+
+      explicit Bag(size_t size) : 
+        size_(size),
+        done_(0),
+        status_(BagStatus_Running)
+      {
+      }
+    };
+
+    class Task;
+
+
+    typedef std::map<uint64_t, Bag>   Bags;
+    typedef std::map<uint64_t, bool>  ExitStatus;
+
+    SharedMessageQueue  queue_;
+
+    boost::mutex  mutex_;
+    uint64_t  countBags_;
+    Bags bags_;
+    std::vector<boost::thread*>   threads_;
+    ExitStatus  exitStatus_;
+    bool continue_;
+
+    boost::condition_variable  bagFinished_;
+
+    static void Worker(BagOfTasksProcessor* that);
+
+    void Cancel(int64_t bag);
+
+    bool Join(int64_t bag);
+
+    float GetProgress(int64_t bag);
+
+    void SignalProgress(Task& task,
+                        Bag& bag);
+
+  public:
+    class Handle : public boost::noncopyable
+    {
+      friend class BagOfTasksProcessor;
+
+    private:
+      BagOfTasksProcessor&  that_;
+      uint64_t              bag_;
+      bool                  hasJoined_;
+      bool                  status_;
+ 
+      Handle(BagOfTasksProcessor&  that,
+             uint64_t bag,
+             bool empty) : 
+        that_(that),
+        bag_(bag),
+        hasJoined_(empty)
+      {
+      }
+
+    public:
+      ~Handle()
+      {
+        Join();
+      }
+
+      void Cancel()
+      {
+        that_.Cancel(bag_);
+      }
+
+      bool Join();
+
+      float GetProgress()
+      {
+        return that_.GetProgress(bag_);
+      }
+    };
+  
+
+    explicit BagOfTasksProcessor(size_t countThreads);
+
+    ~BagOfTasksProcessor();
+
+    Handle* Submit(BagOfTasks& tasks);
+  };
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/MultiThreading/Semaphore.cpp	Tue Jul 17 10:06:39 2018 +0200
@@ -0,0 +1,50 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2018 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/>.
+ **/
+
+
+#include "Semaphore.h"
+
+
+namespace OrthancWSI
+{
+  Semaphore::Semaphore(unsigned int count) : count_(count)
+  {
+  }
+
+  void Semaphore::Release()
+  {
+    boost::mutex::scoped_lock lock(mutex_);
+
+    count_++;
+    condition_.notify_one(); 
+  }
+
+  void Semaphore::Acquire()
+  {
+    boost::mutex::scoped_lock lock(mutex_);
+
+    while (count_ == 0)
+    {
+      condition_.wait(lock);
+    }
+
+    count_++;
+  }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/MultiThreading/Semaphore.h	Tue Jul 17 10:06:39 2018 +0200
@@ -0,0 +1,61 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2018 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 <boost/noncopyable.hpp>
+#include <boost/thread.hpp>
+
+namespace OrthancWSI
+{
+  class Semaphore : public boost::noncopyable
+  {
+  private:
+    unsigned int count_;
+    boost::mutex mutex_;
+    boost::condition_variable condition_;
+
+  public:
+    explicit Semaphore(unsigned int count);
+
+    void Release();
+
+    void Acquire();
+
+    class Locker : public boost::noncopyable
+    {
+    private:
+      Semaphore&  that_;
+
+    public:
+      explicit Locker(Semaphore& that) :
+        that_(that)
+      {
+        that_.Acquire();
+      }
+
+      ~Locker()
+      {
+        that_.Release();
+      }
+    };
+  };
+}

--- a/Framework/Semaphore.cpp	Tue Jul 17 09:55:24 2018 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,50 +0,0 @@
-/**
- * Orthanc - A Lightweight, RESTful DICOM Store
- * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
- * Department, University Hospital of Liege, Belgium
- * Copyright (C) 2017-2018 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/>.
- **/
-
-
-#include "Semaphore.h"
-
-
-namespace OrthancWSI
-{
-  Semaphore::Semaphore(unsigned int count) : count_(count)
-  {
-  }
-
-  void Semaphore::Release()
-  {
-    boost::mutex::scoped_lock lock(mutex_);
-
-    count_++;
-    condition_.notify_one(); 
-  }
-
-  void Semaphore::Acquire()
-  {
-    boost::mutex::scoped_lock lock(mutex_);
-
-    while (count_ == 0)
-    {
-      condition_.wait(lock);
-    }
-
-    count_++;
-  }
-}

--- a/Framework/Semaphore.h	Tue Jul 17 09:55:24 2018 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,61 +0,0 @@
-/**
- * Orthanc - A Lightweight, RESTful DICOM Store
- * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
- * Department, University Hospital of Liege, Belgium
- * Copyright (C) 2017-2018 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 <boost/noncopyable.hpp>
-#include <boost/thread.hpp>
-
-namespace OrthancWSI
-{
-  class Semaphore : public boost::noncopyable
-  {
-  private:
-    unsigned int count_;
-    boost::mutex mutex_;
-    boost::condition_variable condition_;
-
-  public:
-    explicit Semaphore(unsigned int count);
-
-    void Release();
-
-    void Acquire();
-
-    class Locker : public boost::noncopyable
-    {
-    private:
-      Semaphore&  that_;
-
-    public:
-      explicit Locker(Semaphore& that) :
-        that_(that)
-      {
-        that_.Acquire();
-      }
-
-      ~Locker()
-      {
-        that_.Release();
-      }
-    };
-  };
-}

--- a/ViewerPlugin/CMakeLists.txt	Tue Jul 17 09:55:24 2018 +0200
+++ b/ViewerPlugin/CMakeLists.txt	Tue Jul 17 10:06:39 2018 +0200
@@ -154,7 +154,7 @@
   ${ORTHANC_WSI_DIR}/Framework/Inputs/PyramidWithRawTiles.cpp
   ${ORTHANC_WSI_DIR}/Framework/Jpeg2000Reader.cpp
   ${ORTHANC_WSI_DIR}/Framework/Jpeg2000Writer.cpp
-  ${ORTHANC_WSI_DIR}/Framework/Semaphore.cpp
+  ${ORTHANC_WSI_DIR}/Framework/MultiThreading/Semaphore.cpp
 
   ${ORTHANC_ROOT}/Plugins/Samples/Common/DicomDatasetReader.cpp
   ${ORTHANC_ROOT}/Plugins/Samples/Common/DicomPath.cpp

--- a/ViewerPlugin/Plugin.cpp	Tue Jul 17 09:55:24 2018 +0200
+++ b/ViewerPlugin/Plugin.cpp	Tue Jul 17 10:06:39 2018 +0200
@@ -23,8 +23,9 @@
 
 #include "DicomPyramidCache.h"
 #include "../Framework/Jpeg2000Reader.h"
-#include "../Framework/Semaphore.h"
+#include "../Framework/MultiThreading/Semaphore.h"
 
+#include <Core/Logging.h>
 #include <Core/Images/ImageProcessing.h>
 #include <Core/Images/PngWriter.h>
 #include <Core/OrthancException.h>
@@ -309,6 +310,8 @@
       return -1;
     }
 
+    Orthanc::Logging::Initialize(context);
+
     // Limit the number of PNG transcoders to the number of available
     // hardware threads (e.g. number of CPUs or cores or
     // hyperthreading units)