Import Geant4 9.6.0 source tree

2016-06-09 17:01:34 +02:00
parent b1eb5424d2
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+//
+// ********************************************************************
+// * License and Disclaimer                                           *
+// *                                                                  *
+// * The  Geant4 software  is  copyright of the Copyright Holders  of *
+// * the Geant4 Collaboration.  It is provided  under  the terms  and *
+// * conditions of the Geant4 Software License,  included in the file *
+// * LICENSE and available at  http://cern.ch/geant4/license .  These *
+// * include a list of copyright holders.                             *
+// *                                                                  *
+// * Neither the authors of this software system, nor their employing *
+// * institutes,nor the agencies providing financial support for this *
+// * work  make  any representation or  warranty, express or implied, *
+// * regarding  this  software system or assume any liability for its *
+// * use.  Please see the license in the file  LICENSE  and URL above *
+// * for the full disclaimer and the limitation of liability.         *
+// *                                                                  *
+// * This  code  implementation is the result of  the  scientific and *
+// * technical work of the GEANT4 collaboration.                      *
+// * By using,  copying,  modifying or  distributing the software (or *
+// * any work based  on the software)  you  agree  to acknowledge its *
+// * use  in  resulting  scientific  publications,  and indicate your *
+// * acceptance of all terms of the Geant4 Software license.          *
+// ********************************************************************
+/// @file G4MPIrandomSeedGenerator.cc
+/// @brief An implementation of random number seed distribution
+
+#include "G4MPIrandomSeedGenerator.hh"
+#include "G4MPImanager.hh"
+#include "Randomize.hh"
+
+// --------------------------------------------------------------------------
+G4MPIrandomSeedGenerator::G4MPIrandomSeedGenerator()
+  : G4VMPIseedGenerator()
+{
+  GenerateSeeds();
+}
+
+// --------------------------------------------------------------------------
+G4MPIrandomSeedGenerator::~G4MPIrandomSeedGenerator()
+{
+}
+
+// --------------------------------------------------------------------------
+G4bool G4MPIrandomSeedGenerator::CheckDoubleCount()
+{
+  G4MPImanager* g4MPI = G4MPImanager::GetManager();
+  G4int nsize = g4MPI-> GetSize();
+
+  for (G4int i = 0; i < nsize; i++) {
+    for (G4int j = 0; j < nsize; j++) {
+      if((i != j) && (seedList[i] == seedList[j])) {
+        G4double x = G4UniformRand();
+        seedList[j] = G4long(x*LONG_MAX);
+        return false;
+      }
+    }
+  }
+
+  return true;
+}
+
+// --------------------------------------------------------------------------
+void G4MPIrandomSeedGenerator::GenerateSeeds()
+{
+  G4MPImanager* g4MPI = G4MPImanager::GetManager();
+  G4int nsize= g4MPI-> GetSize();
+  seedList.clear();
+
+  for (G4int i = 0; i < nsize; i++) {
+    G4double x = G4UniformRand();
+    G4int seed = G4long(x*LONG_MAX);
+    seedList.push_back(seed);
+  }
+
+  while(! CheckDoubleCount()) {
+    continue;
+  }
+}