Gabriele Cosmo
100 lines
3.3 KiB
C++
100 lines
3.3 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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//
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//
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//
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//
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// ------------------------------------------------------------
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// GEANT 4 class header file
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// ------------------------------------------------------------
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// Class description:
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//
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// Class implementing a pool of random numbers filled according
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// to specified fixed size (default 1024).
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// Author: A.Dotti (SLAC)
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// ------------------------------------------------------------
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#ifndef G4UNIFORMRANDPOOL_HH
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#define G4UNIFORMRANDPOOL_HH
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#include "G4Types.hh"
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#include "Randomize.hh"
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#include <algorithm>
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#include <cassert>
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#define G4UNIFORMRANDPOOL_DEFAULT_POOLSIZE 1024
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#define G4UNIFORMRANDPOOL_TINY_POOLSIZE 128
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#define G4UNIFORMRANDPOOL_SMALL_POOLSIZE 256
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#define G4UNIFORMRANDPOOL_MEDIUM_POOLSIZE 512
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#define G4UNIFORMRANDPOOL_LARGE_POOLSIZE 2048
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#define G4UNIFORMRANDPOOL_HUGE_POOLSIZE 8192
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class G4UniformRandPool
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{
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public:
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G4UniformRandPool();
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explicit G4UniformRandPool(G4int ps);
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~G4UniformRandPool();
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void Resize(G4int newSize);
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void GetMany(G4double* rnds, G4int howMany);
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inline G4double GetOne();
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inline G4int GetPoolSize() const;
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// These two static methods are used to
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// simulate the calls of CLHEP::HepRandom
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//
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static G4double flat();
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static void flatArray(G4int howmany, G4double* rnds);
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private:
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void Fill(G4int howmany);
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private:
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G4int size{G4UNIFORMRANDPOOL_DEFAULT_POOLSIZE};
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G4double* buffer{nullptr};
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G4int currentIdx{0};
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};
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inline G4double G4UniformRandPool::GetOne()
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{
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// No more available numbers, re-fill
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//
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if(currentIdx >= /*(unsigned int)*/ size)
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{
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Fill(/*(unsigned int)*/ size);
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}
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return buffer[currentIdx++];
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}
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inline G4int G4UniformRandPool::GetPoolSize() const
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{
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return size;
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}
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#endif
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