HiveNumbers.cpp

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* (c) Copyright 1998-2025 CERN for the benefit of the LHCb and ATLAS collaborations *
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* This software is distributed under the terms of the Apache version 2 licence,     *
* copied verbatim in the file "LICENSE".                                            *
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// Framework include files
#include "HiveNumbers.h"
#include <GaudiKernel/GaudiException.h>
#include <GaudiKernel/IRndmGen.h>
#include <GaudiKernel/IRndmGenSvc.h>
#include <GaudiKernel/SmartIF.h>
 
namespace {
  constexpr double HIVENUMBERS_BUFFER_SIZE = 1000;
}
 
HiveRndm::HiveNumbersMutex HiveRndm::HiveNumbers::m_genMutex;
 
// Standard constructor
HiveRndm::HiveNumbers::HiveNumbers() : m_buffer_index( 0 ), m_buffer_size( HIVENUMBERS_BUFFER_SIZE ), m_generator( 0 ) {
  m_buffer.reserve( m_buffer_size );
}
 
// Copy constructor
HiveRndm::HiveNumbers::HiveNumbers( const HiveRndm::HiveNumbers& copy )
    : m_buffer_index( 0 ), m_buffer_size( HIVENUMBERS_BUFFER_SIZE ), m_generator( copy.m_generator ) {
  m_buffer.reserve( m_buffer_size );
  if ( 0 != m_generator ) { m_generator->addRef(); }
}
 
// Construct and initialize the generator
HiveRndm::HiveNumbers::HiveNumbers( const SmartIF<IRndmGenSvc>& svc, const IRndmGen::Param& par )
    : m_buffer_index( 0 ), m_buffer_size( HIVENUMBERS_BUFFER_SIZE ), m_generator( 0 ) {
  m_buffer.reserve( m_buffer_size );
  StatusCode status = initialize( svc, par );
  if ( !status.isSuccess() ) { throw GaudiException( "Initialization failed !", "HiveRndm::HiveNumbers", status ); }
}
 
// Standard destructor
HiveRndm::HiveNumbers::~HiveNumbers() { finalize().ignore(); }
 
// Initialize the generator
StatusCode HiveRndm::HiveNumbers::initialize( const SmartIF<IRndmGenSvc>& svc, const IRndmGen::Param& par ) {
  if ( svc.isValid() && 0 == m_generator ) {
    return svc->generator( par, m_generator );
  }
  return StatusCode::FAILURE;
}
 
// Initialize the generator
StatusCode HiveRndm::HiveNumbers::finalize() {
  if ( 0 != m_generator ) {
    m_generator->finalize().ignore();
    m_generator->release();
    m_generator = 0;
  }
  return StatusCode::SUCCESS;
}