Import Geant4 6.0.0 source tree

2016-06-09 10:41:53 +02:00
parent 4aea781e80
commit 96686e0c8f
6560 changed files with 153347 additions and 238155 deletions
@@ -0,0 +1,173 @@
+#ifndef SIMPLESMARTPTR_H
+#define SIMPLESMARTPTR_H
+
+#include "zipios++/zipios-config.h"
+
+namespace zipios {
+
+/** SimpleSmartPointer is a simple reference counting smart pointer
+    template. The type pointed to must keep a reference count that is
+    accessible through the two methods void ref() const and unsigned
+    int unref() const. The type must also handle the reference count
+    properly. The easiest way to do that is to use the ReferenceCount
+    template class. */
+template< class Type >
+class SimpleSmartPointer {
+public:
+  Type *operator-> () const { return _p ;  }
+
+  Type &operator* ()  const { return *_p ; }
+
+  SimpleSmartPointer( Type *p = 0 ) : _p( p ) { ref() ; }
+
+  template< class T2 > SimpleSmartPointer( const SimpleSmartPointer< T2 > &src )
+    : _p( src.get() ) { ref() ; }
+
+  SimpleSmartPointer( const SimpleSmartPointer &src ) : _p( src.get() ) {
+    ref() ;
+  }
+
+  ~SimpleSmartPointer () { if ( unref() == 0 ) deleteIt() ; }
+
+  template< class T2 >
+  SimpleSmartPointer &operator= ( const SimpleSmartPointer< T2 > &src ) {
+    ref( src.get() ) ;
+    if ( unref() == 0 )
+      deleteIt() ;
+    _p = src.get() ;
+    return *this ;
+  }
+
+  SimpleSmartPointer &operator= ( const SimpleSmartPointer &src ) {
+    ref( src.get() ) ;
+    if ( unref() == 0 )
+      deleteIt() ;
+    _p = src.get() ;
+    return *this ;
+  }
+
+  SimpleSmartPointer &operator=( Type *src ) {
+    _p = src ;
+    ref() ;
+    return *this ;
+  }
+
+  bool operator== ( const Type *p )                const { return _p == p     ; }
+  bool operator!= ( const Type *p )                const { return _p != p     ; }
+  bool operator== ( const SimpleSmartPointer &sp ) const { return _p == sp.get() ; }
+  bool operator!= ( const SimpleSmartPointer &sp ) const { return _p != sp.get() ; }
+  bool operator!  ()                               const { return ! _p        ; }
+  // This next method is inspired by iostream, and is for use with
+  // if ( some_smart_pointer ).
+  operator void*() const { return _p ? (void *)(-1) : (void *)(0) ; }
+
+  Type *get() const { return _p ; }
+
+  /** Returns the reference count - For debugging purposes. */
+  unsigned int getReferenceCount() const { return _p->getReferenceCount(); }
+
+
+private:
+  template< class T2 >
+  void ref( const T2 *ptr ) { if ( ptr ) ptr->ref() ; }
+
+  void ref() const { if ( _p ) _p->ref() ; }
+  unsigned int unref() const {
+    if ( _p )
+      return _p->unref();
+    else
+      return 0 ;
+  }
+  void deleteIt() {
+//      if( _p )
+//        cerr << "SimpleSmartPointer: Deleting object!" << endl ;
+    delete _p ;
+  }
+  Type *_p ;
+};
+
+
+/** ReferenceCount is useful to ensure proper handling of the
+    reference count for (objects of) classes handled through a
+    SimpleSmartPointer. Subclassing ReferenceCount is all a class
+    needs to become ready for being handled by
+    SimpleSmartPointer. Another way is to add a ReferenceCount member
+    variable to a class and write two methods 'void ref() const' and
+    'unsigned int unref() const' that invoke the same methods in the
+    ReferenceCount variable. */
+template< class Type >
+class ReferenceCount {
+  /** SimpleSmartPointer needs to be a friend to invoke the private
+      ref() and unref() methods.  */
+  friend class SimpleSmartPointer< Type > ;
+  friend class SimpleSmartPointer< const Type > ;
+  /** Type also needs to be a friend to invoke the private ref() and
+      unref() methods, in case Type doesn't want to inherit
+      ReferenceCount and thus needs to invoke ref() and unref()
+      through forwarding member functions. */
+  //
+  //  Originally the following template parameter was made a friend.
+  //  This is not allowed by the standard so comment it out:
+  //
+  // friend Type ;
+  //
+  //  Initially hack things by making the necessary classes friends
+  //  even though we don't know really which they are.  This is an
+  //  Hideous Hack.
+  friend class FileEntry ;
+  friend class Bogus ;
+
+public:
+  /** Constructor intializes count to zero. */
+  ReferenceCount() : _ref_count( 0 ) {}
+
+  /** Copy-constructor intializes count to zero. It doesn't copy it
+      from src. */
+  ReferenceCount( const ReferenceCount &/*MD:src*/ ) : _ref_count( 0 ) {}
+
+  /** The assignment operator doesn't copy the reference count, it
+      leaves it unchanged.  */
+  const ReferenceCount &operator= ( const ReferenceCount &src ) {}
+private:
+
+  /** Increases the reference count. */
+  void ref() const           { ++_ref_count ;        }
+
+  /** Decreases the reference count. */
+  unsigned int unref() const { return --_ref_count ; }
+
+  /** Returns the reference count - For debugging purposes. */
+  unsigned int getReferenceCount() const { return _ref_count; }
+
+  /** Holds the actual reference count */
+  mutable unsigned short _ref_count ;
+};
+
+
+
+} // namespace
+
+#endif
+
+/** \file
+    Header file that defines SimpleSmartPointer and ReferenceCount.
+*/
+
+/*
+  Zipios++ - a small C++ library that provides easy access to .zip files.
+  Copyright (C) 2000  Thomas Søndergaard
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
+*/