include/Geant4/G4TypeKeyT.hh

0001 //
0002 // ********************************************************************
0003 // * License and Disclaimer                                           *
0004 // *                                                                  *
0005 // * The  Geant4 software  is  copyright of the Copyright Holders  of *
0006 // * the Geant4 Collaboration.  It is provided  under  the terms  and *
0007 // * conditions of the Geant4 Software License,  included in the file *
0008 // * LICENSE and available at  http://cern.ch/geant4/license .  These *
0009 // * include a list of copyright holders.                             *
0010 // *                                                                  *
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0015 // * use.  Please see the license in the file  LICENSE  and URL above *
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0017 // *                                                                  *
0018 // * This  code  implementation is the result of  the  scientific and *
0019 // * technical work of the GEANT4 collaboration.                      *
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0022 // * use  in  resulting  scientific  publications,  and indicate your *
0023 // * acceptance of all terms of the Geant4 Software license.          *
0024 // ********************************************************************
0025 //
0026 //
0027 // Type key class
0028 //
0029 // Jane Tinslay, September 2006
0030 //
0031 #ifndef G4TYPEKEYT_HH
0032 #define G4TYPEKEYT_HH
0033
0034 #include "G4TypeKey.hh"
0035
0036 template <typename T>
0037 class G4TypeKeyT : public G4TypeKey {
0038
0039 public:
0040
0041   G4TypeKeyT() {
0042     static G4ThreadLocal Key *pkey = nullptr ;
0043     if (pkey == nullptr) { pkey = new Key; *pkey = NextKey(); }
0044     Key &key = *pkey;
0045     fMyKey = key;
0046   }
0047
0048   ~G4TypeKeyT() override = default;
0049
0050 };
0051
0052 #endif