Atlas_RNG Class Reference

#include <Sherpa_i.h>

Inheritance diagram for Atlas_RNG:

Collaboration diagram for Atlas_RNG:

Public Member Functions
	Atlas_RNG (CLHEP::HepRandomEngine *)
	~Atlas_RNG ()
double	Get ()
bool	CanRestoreStatus () const
void	SaveStatus ()
void	RestoreStatus ()
const std::string	GenerateUID () const

Private Attributes
CLHEP::HepRandomEngine *	p_engine
std::string	m_filename
std::once_flag	m_once_flag_atlas_rng

Detailed Description

Definition at line 77 of file Sherpa_i.h.

Constructor & Destructor Documentation

Atlas_RNG()

Atlas_RNG::Atlas_RNG

(

CLHEP::HepRandomEngine *

engine

)

Definition at line 373 of file Sherpa_i.cxx.

                                                 :
  External_RNG(), p_engine(engine), m_filename("Config.conf")
{
}

~Atlas_RNG()

Atlas_RNG::~Atlas_RNG

(

)

Definition at line 378 of file Sherpa_i.cxx.

{ std::ignore = std::remove(m_filename.c_str()); }

Member Function Documentation

CanRestoreStatus()

bool Atlas_RNG::CanRestoreStatus ( ) const

inline

Definition at line 86 of file Sherpa_i.h.

{ return true; }

GenerateUID()

const std::string Atlas_RNG::GenerateUID

(

)

const

Definition at line 386 of file Sherpa_i.cxx.

                                             {
  std::string result{""};
  const int nMax = 26;
  char alphabet[nMax] = { 'a', 'b', 'c', 'd', 'e', 'f', 'g',
                          'h', 'i', 'j', 'k', 'l', 'm', 'n',
                          'o', 'p', 'q', 'r', 's', 't', 'u',
                          'v', 'w', 'x', 'y', 'z' };
  for (size_t i = 0; i < 6; ++i) {
    result += alphabet[rand() % nMax];
  }
  return result;
}

Get()

double Atlas_RNG::Get

(

)

Definition at line 380 of file Sherpa_i.cxx.

                     {
 
  return CLHEP::RandFlat::shoot(p_engine);
 
}

RestoreStatus()

void Atlas_RNG::RestoreStatus

(

)

Definition at line 412 of file Sherpa_i.cxx.

{ p_engine->restoreStatus(m_filename.c_str()); }

SaveStatus()

void Atlas_RNG::SaveStatus

(

)

Definition at line 399 of file Sherpa_i.cxx.

                           {
  // We set the file name first time the worker calls SaveStatus
  std::call_once(m_once_flag_atlas_rng, [&](){
      struct stat info;
      if ( !stat("/dev/shm", &info)) {
        m_filename = "/dev/shm/Config.conf.";
      }
      m_filename += GenerateUID();
      std::cout << "RNG state being saved to: " << m_filename << std::endl;
      });
  p_engine->saveStatus(m_filename.c_str());
}

Member Data Documentation

m_filename

std::string Atlas_RNG::m_filename

private

Definition at line 79 of file Sherpa_i.h.

m_once_flag_atlas_rng

std::once_flag Atlas_RNG::m_once_flag_atlas_rng

private

Definition at line 80 of file Sherpa_i.h.

p_engine

CLHEP::HepRandomEngine* Atlas_RNG::p_engine

private

Definition at line 78 of file Sherpa_i.h.

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The documentation for this class was generated from the following files:

• Sherpa_i.h
• Sherpa_i.cxx