Gabriele Cosmo
83 lines
3.1 KiB
C++
83 lines
3.1 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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/// @file G4MPIrandomSeedGenerator.cc
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/// @brief An implementation of random number seed distribution
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#include "G4MPIrandomSeedGenerator.hh"
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#include "mpi.h"
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#include "G4MPImanager.hh"
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#include "Randomize.hh"
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// --------------------------------------------------------------------------
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G4MPIrandomSeedGenerator::G4MPIrandomSeedGenerator() : G4VMPIseedGenerator()
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{
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GenerateSeeds();
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}
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// --------------------------------------------------------------------------
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G4MPIrandomSeedGenerator::~G4MPIrandomSeedGenerator() {}
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// --------------------------------------------------------------------------
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G4bool G4MPIrandomSeedGenerator::CheckDoubleCount()
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{
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G4MPImanager* g4mpi = G4MPImanager::GetManager();
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G4int nsize = g4mpi->GetActiveSize();
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for (G4int i = 0; i < nsize; i++) {
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for (G4int j = 0; j < nsize; j++) {
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if ((i != j) && (seed_list_[i] == seed_list_[j])) {
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G4double x = G4UniformRand();
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seed_list_[j] = G4long(x * LONG_MAX);
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return false;
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}
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}
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}
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return true;
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}
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// --------------------------------------------------------------------------
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void G4MPIrandomSeedGenerator::GenerateSeeds()
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{
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G4MPImanager* g4mpi = G4MPImanager::GetManager();
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G4int nsize = g4mpi->GetActiveSize();
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seed_list_.clear();
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for (G4int i = 0; i < nsize; i++) {
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G4double x = G4UniformRand();
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G4int seed = G4long(x * LONG_MAX);
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seed_list_.push_back(seed);
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}
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while (!CheckDoubleCount()) {
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continue;
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}
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}
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