ThreadInitTool.h

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/*
  Copyright (C) 2002-2025 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef ATHEXHIVE_THREADINITTOOL_H
#define ATHEXHIVE_THREADINITTOOL_H 
 
#include "AthenaBaseComps/AthAlgTool.h"
#include "GaudiKernel/IThreadInitTool.h"
 
#include <string>
#include <atomic>
 
//-------------------------------------------------------------------------------
//
// This is an example of a Tool that will get executed in every thread by the
// ThreadPoolSvc.
//
// At the beginning of the job, just after the ThreadPool has been created,
// the initThread() method of the Tool will be called in each thread.
//
// as a check, m_nInitThreads MUST be incremented at the end of the initThread()
// method.
//
// At the end of the job, the terminateThread() method will be called.
//
//-------------------------------------------------------------------------------
 
 
class ThreadInitTool: virtual public extends<AthAlgTool, IThreadInitTool> {
 
public:
  ThreadInitTool( const std::string&, const std::string&, const IInterface* );
 
 
  virtual void initThread() override;
  virtual void terminateThread() override;
 
  virtual unsigned int nInit() const override { return m_nInitThreads; }
 
private:
  // Number of threads that have been initialized
  std::atomic_uint m_nInitThreads{0};
 
};
 
#endif