IOBoundAlgSchedulerSvc.h

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/***********************************************************************************\
* (c) Copyright 1998-2019 CERN for the benefit of the LHCb and ATLAS collaborations *
*                                                                                   *
* This software is distributed under the terms of the Apache version 2 licence,     *
* copied verbatim in the file "LICENSE".                                            *
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* In applying this licence, CERN does not waive the privileges and immunities       *
* granted to it by virtue of its status as an Intergovernmental Organization        *
* or submit itself to any jurisdiction.                                             *
\***********************************************************************************/
#ifndef GAUDIHIVE_IOBOUNDALGSCHEDULERSVC_H
#define GAUDIHIVE_IOBOUNDALGSCHEDULERSVC_H

#include <functional>
#include <thread>

// Framework include files
#include "GaudiKernel/IAccelerator.h"
#include "GaudiKernel/IAlgTask.h"
#include "GaudiKernel/IRunable.h"
#include "GaudiKernel/Service.h"

// External libs
#include "tbb/concurrent_queue.h"

//---------------------------------------------------------------------------

class IOBoundAlgSchedulerSvc : public extends<Service, IAccelerator> {
public:
  using extends::extends;

  StatusCode initialize() override;

  StatusCode finalize() override;

  StatusCode push( IAlgTask& task ) override;

private:
  // Utils and shortcuts ----------------------------------------------------

  void activate();

  StatusCode deactivate();

  bool m_isActive = false;

  std::thread m_thread;

  // Actions management -----------------------------------------------------

  typedef std::function<StatusCode()> action;
  // typedef std::shared_ptr<action> actionPtr;
  tbb::concurrent_bounded_queue<action> m_actionsQueue;
};

#endif // GAUDIHIVE_IOBOUNDALGSCHEDULERSVC_H