/usr/include/oce/NCollection_Handle.hxx is in liboce-foundation-dev 0.17.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 | // Created on: 2009-01-30
// Created by: Andrey BETENEV (abv)
// Copyright (c) 2009-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.
#ifndef NCollection_Handle_HeaderFile
#define NCollection_Handle_HeaderFile
#include <MMgt_TShared.hxx>
//! Standard type function allowing to check that contained object is Handle
Standard_EXPORT const Handle(Standard_Type)& STANDARD_TYPE(NCollection_Handle);
//! Purpose: This template class is used to define Handle adaptor
//! for allocated dynamically objects of arbitrary type.
//!
//! The advantage is that this handle will automatically destroy
//! the object when last referred Handle is destroyed (i.e. it is a
//! typical smart pointer), and that it can be handled as
//! Handle(Standard_Transient) in OCCT components.
//!
//! Use it as follows:
//!
//! NCollection_Handle<T> aPtr = new T (...);
//!
//! aPtr->Method(...);
//!
//! Handle(Standard_Transient) aBase = aPtr;
//! if ( aBase->IsKind(STANDARD_TYPE(NCollection_Handle)) )
//! {
//! NCollection_Handle<T> aPtr2 = NCollection_Handle<T>::DownCast (aBase);
//! if ( ! aPtr2.IsNull() )
//! aPtr2->Method2();
//! }
template <class T>
class NCollection_Handle : public Handle(Standard_Transient)
{
private:
//! Internal adaptor class wrapping actual type
//! and enhancing it by reference counter inherited from
//! Standard_Transient
class Ptr : public Standard_Transient
{
public:
//! Constructor: stores pointer to the object
Ptr (T* theObj) { myPtr = theObj; }
//! Destructor deletes the object
~Ptr () { if ( myPtr ) delete myPtr; myPtr = 0; }
//! Implementation of DynamicType() method
const Handle(Standard_Type)& DynamicType() const
{ return STANDARD_TYPE(NCollection_Handle); }
public:
T* myPtr; //!< Pointer to the object
};
//! Constructor of handle from pointer on newly allocated object.
//! Note that additional argument is used to avoid ambiguity with
//! public constructor from pointer when Handle is intilialized by 0.
NCollection_Handle (Ptr* thePtr, int)
: Handle(Standard_Transient) (thePtr) {}
public:
typedef T element_type;
//! Default constructor; creates null handle
NCollection_Handle () {}
//! Constructor of handle from pointer on newly allocated object
NCollection_Handle (T* theObject)
: Handle(Standard_Transient) (theObject ? new Ptr (theObject) : 0) {}
//! Cast handle to contained type
T* operator -> () { return ((Ptr*)ControlAccess())->myPtr; }
//! Cast handle to contained type
const T* operator -> () const { return ((Ptr*)ControlAccess())->myPtr; }
//! Cast handle to contained type
T& operator * () { return *((Ptr*)ControlAccess())->myPtr; }
//! Cast handle to contained type
const T& operator * () const { return *((Ptr*)ControlAccess())->myPtr; }
//! Downcast arbitrary Handle to the argument type if contained
//! object is Handle for this type; returns null otherwise
static NCollection_Handle<T> DownCast (const Handle(Standard_Transient)& theOther)
{
return NCollection_Handle<T> (theOther.IsNull() ? 0 : dynamic_cast<Ptr*> (theOther.operator->()), 0);
}
};
#endif
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