G4BlockingList.hh

Go to the documentation of this file.

//
// ********************************************************************
// * 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.          *
// ********************************************************************
//
// class G4BlockingList
//
// Class description:
//
// A utility class responsible for (efficiently) maintaining a List 
// of blocked volume numbers, with rapid `reset' operations.
//
// Notes:
//
// Implemented via a ValVector of ints: a tag value is used to set
// the indices of blocked volumes. On reset the current tag value is
// increased, so that the ValVector must only be zeroed when the
// numerical range of the tag is used.
 
// 24.7.96, P.Kent - Separated from G4Navigator
// --------------------------------------------------------------------
#ifndef G4BLOCKINGLIST_HH
#define G4BLOCKINGLIST_HH 1
 
#include "G4Types.hh"
#include <vector>
 
const G4int kBlockingListMaxDefault = 500; // Block up to 511 daughters
                                           // initially
const G4int kBlockingListStride = 128;
const G4int kBlockTagNoMax = 2147483647;   // 2^31-1 maximum tag no may reach
 
class G4BlockingList
{
  public:
 
    G4BlockingList(G4int maxDefault = kBlockingListMaxDefault,
                   G4int stride = kBlockingListStride);
      // Create empty blocking List of default size and `stride' resize count.
 
    ~G4BlockingList() = default;
      // Destructor. No operations.
 
    void Reset();
      // Efficiently `Reset' the blocking List, so that no volumes
      // are blocked [Advance tag number and only fully clear List
      // if tag max reached]
 
    void FullyReset();
      // Clear the blocking List and reset tag value [slow].
 
    void Enlarge(const G4int nv);
      // Enlarges blocking List if current size < nv, in units of stride.
      // Clears the new part of the List.
 
    std::size_t Length() const;
      // Returns the current length of the List. Note a length of 16
      // means volumes of indices between 0 & 15 inclusive may be blocked.
 
    void BlockVolume(const G4int v);
      // Block the volume number v.
      // Requires: 0<=v<Length().
 
    G4bool IsBlocked(const G4int v) const;
      // Return true if the volume number v is blocked, else false.
      // Requires: 0 <= v < Length().
 
  private:
 
    G4int fBlockTagNo = 1, fStride;
      // Current blocked volume tag number.
 
    std::vector<G4int> fBlockingList; 
      // Blocked volumes: Elements with indices
      // corresponding to blocked volume set to fBlockTagNo.
};
 
#include "G4BlockingList.icc"
 
#endif