/usr/include/trilinos/Sacado_Handle.hpp is in libtrilinos-sacado-dev 12.12.1-5.
This file is owned by root:root, with mode 0o644.
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// $Source$
// @HEADER
// ***********************************************************************
//
// Sacado Package
// Copyright (2006) Sandia Corporation
//
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
// license for use of this work by or on behalf of the U.S. Government.
//
// 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 2.1 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
// USA
// Questions? Contact David M. Gay (dmgay@sandia.gov) or Eric T. Phipps
// (etphipp@sandia.gov).
//
// ***********************************************************************
// @HEADER
#ifndef SACADO_HANDLE_HPP
#define SACADO_HANDLE_HPP
namespace Sacado {
/*!
* \brief A generic handle class
*/
template <typename T>
class Handle {
public:
//! Create new handle from pointer \c p
Handle(T* p) : rep(p), count(new int(1)) {}
//! Copy handle
Handle(const Handle& h) : rep(h.rep), count(h.count) { (*count)++; }
//! Destroy handle
~Handle() { decrementRef(); }
//! Return pointer to underlying data
T* get() { return rep; }
//! Return pointer to underlying data
const T* get() const { return rep; }
//! Assign to handle \c h as its own copy
void Assign(const Handle& h) {
decrementRef();
rep = new T(*(h.rep));
count = new int(1);
}
//! Make handle have its own copy of \c rep
void makeOwnCopy() {
T *tmp;
if (*count > 1) {
tmp = rep;
(*count)--;
rep = new T(*tmp);
count = new int(1);
}
}
//! Assignment operator
Handle& operator = (const Handle& h) {
if (this != &h) {
decrementRef();
rep = h.rep;
count = h.count;
(*count)++;
}
return *this;
}
//! Dereference
T* operator -> () const { return rep; }
//! Dereference
const T& operator * () const { return *rep; }
//! Dereference
T& operator * () { return *rep; }
private:
//! Pointer to data
T *rep;
//! Reference count
int *count;
//! Decrement reference
void decrementRef() {
(*count)--;
if (*count == 0) {
delete rep;
delete count;
}
}
}; // class Handle
//! Compare two handles
template <typename T>
bool operator==(const Handle<T>& h1, const Handle<T>& h2) {
return h1.get() == h2.get();
}
} // namespace Sacado
#endif // SACADO_HANDLE_HPP
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