/usr/include/getfem/dal_shared_ptr.h is in libgetfem++-dev 4.2.1~beta1~svn4635~dfsg-3+b1.
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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 | /* -*- c++ -*- (enables emacs c++ mode) */
/*===========================================================================
Copyright (C) 2004-2012 Julien Pommier
This file is a part of GETFEM++
Getfem++ 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 3 of the License, or
(at your option) any later version along with the GCC Runtime Library
Exception either version 3.1 or (at your option) any later version.
This program 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 and GCC Runtime Library Exception for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
As a special exception, you may use this file as it is a part of a free
software library without restriction. Specifically, if other files
instantiate templates or use macros or inline functions from this file,
or you compile this file and link it with other files to produce an
executable, this file does not by itself cause the resulting executable
to be covered by the GNU Lesser General Public License. This exception
does not however invalidate any other reasons why the executable file
might be covered by the GNU Lesser General Public License.
===========================================================================*/
/**@file dal_shared_ptr.h
@author Julien Pommier <Julien.Pommier@insa-toulouse.fr>
@date June 2004.
@brief A (very simplified and rough) version of boost::shared_ptr.
*/
#ifndef DAL_SHARED_PTR_H__
#define DAL_SHARED_PTR_H__
#include "dal_config.h"
namespace dal {
/**
a (very simplified and rough) version of boost::shared_ptr
- not thread safe.
- no fancy operators
- possibility to handle non-refcounted pointers (i.e. normal pointers)
caution: should not be used for data allocated with new[]
*/
template <typename T> class shared_ptr {
T *p;
unsigned long *refcnt;
public:
shared_ptr() : p(0), refcnt(0) {}
explicit shared_ptr(T *q, bool refcounted = true) : p(q), refcnt(0) { if (refcounted) refcnt = new unsigned long(1); }
shared_ptr(const shared_ptr<T> &other) : p(other.p), refcnt(other.refcnt) { if (refcnt) ++(*refcnt); }
void reset(T *q = NULL, bool refcounted = true) { release(); if (q) {shared_ptr<T> tmp(q, refcounted); (*this).swap(tmp);} }
void swap(shared_ptr<T> &other) { std::swap(p,other.p); std::swap(refcnt,other.refcnt); }
void release() { if (refcnt && --(*refcnt) == 0) { if (p) delete p; delete refcnt; } p = 0; refcnt = 0; }
~shared_ptr() { release(); }
shared_ptr<T> &operator=(const shared_ptr<T> &other) { shared_ptr<T> tmp(other); swap(tmp); return *this; }
T *get() const { return p; }
T& operator*() const { return *p; }
T* operator->() const { return p; }
bool counted() { return refcnt; }
unsigned long use_count() const { return refcnt ? 0 : *refcnt; }
};
/**
shared_array uses operator delete[] for destruction of data
*/
template <typename T> class shared_array {
T *p;
unsigned long *refcnt;
public:
shared_array() : p(0), refcnt(0) {}
explicit shared_array(T *q, bool refcounted = true) : p(q), refcnt(0) { if (refcounted) refcnt = new unsigned long(1); }
shared_array(const shared_array<T> &other) : p(other.p), refcnt(other.refcnt) { if (refcnt) ++(*refcnt); }
void reset(T *q, bool refcounted = true) { release(); shared_array<T> tmp(q,refcounted); (*this).swap(tmp); }
void swap(shared_array<T> &other) { std::swap(p,other.p); std::swap(refcnt,other.refcnt); }
void release() { if (refcnt && --(*refcnt) == 0) { if (p) delete[] p; delete refcnt; } p = 0; refcnt = 0; }
~shared_array() { release(); }
shared_array<T> &operator=(const shared_array<T> &other) { shared_array<T> tmp(other); swap(tmp); return *this; }
T *get() const { return p; }
bool counted() { return refcnt; }
unsigned long use_count() const { return refcnt ? 0 : *refcnt; }
T& operator[](unsigned i) const { return p[i]; }
};
}
#endif
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