/usr/include/spatialindex/tools/SmartPointer.h is in libspatialindex-dev 1.7.0-1.
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 | // Spatial Index Library
//
// Copyright (C) 2004 Navel Ltd.
//
// 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// Email:
// mhadji@gmail.com
#pragma once
namespace Tools
{
template <class X> class SmartPointer
{
public:
explicit SmartPointer(X* p = 0) throw() : m_pointer(p) { m_prev = m_next = this; }
~SmartPointer() { release(); }
SmartPointer(const SmartPointer& p) throw() { acquire(p); }
SmartPointer& operator=(const SmartPointer& p)
{
if (this != &p)
{
release();
acquire(p);
}
return *this;
}
X& operator*() const throw() { return *m_pointer; }
X* operator->() const throw() { return m_pointer; }
X* get() const throw() { return m_pointer; }
bool unique() const throw() { return m_prev ? m_prev == this : true; }
private:
X* m_pointer;
mutable const SmartPointer* m_prev;
mutable const SmartPointer* m_next;
void acquire(const SmartPointer& p) throw()
{
m_pointer = p.m_pointer;
m_next = p.m_next;
m_next->m_prev = this;
m_prev = &p;
#ifndef mutable
p.m_next = this;
#else
(const_cast<linked_ptr<X>*>(&p))->m_next = this;
#endif
}
void release()
{
if (unique()) delete m_pointer;
else
{
m_prev->m_next = m_next;
m_next->m_prev = m_prev;
m_prev = m_next = 0;
}
m_pointer = 0;
}
};
}
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