124 lines
3.6 KiB
C++
124 lines
3.6 KiB
C++
/**************************************************************************
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* auto_ptr.hxx -- A simple auto_ptr definition.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* $Id$
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* (Log is kept at end of this file)
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**************************************************************************/
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#ifndef _AUTO_PTR_HXX
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#define _AUTO_PTR_HXX
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#include "fg_stl_config.h"
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//-----------------------------------------------------------------------------
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//
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// auto_ptr is initialised with a pointer obtained via new and deletes that
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// object when it itself is destroyed (such as when leaving block scope).
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// auto_ptr can be used in any way that a normal pointer can be.
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//
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// This class is only required when the STL doesn't supply one.
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//
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template <class X> class auto_ptr {
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private:
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X* ptr;
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mutable bool owns;
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public:
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typedef X element_type;
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explicit auto_ptr(X* p = 0) : ptr(p), owns(p) {}
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auto_ptr(const auto_ptr& a) : ptr(a.ptr), owns(a.owns) {
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a.owns = 0;
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}
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#ifdef _FG_MEMBER_TEMPLATES
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template <class T> auto_ptr(const auto_ptr<T>& a)
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: ptr(a.ptr), owns(a.owns) {
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a.owns = 0;
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}
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#endif
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auto_ptr& operator = (const auto_ptr& a) {
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if (&a != this) {
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if (owns)
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delete ptr;
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owns = a.owns;
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ptr = a.ptr;
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a.owns = 0;
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}
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}
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#ifdef _FG_MEMBER_TEMPLATES
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template <class T> auto_ptr& operator = (const auto_ptr<T>& a) {
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if (&a != this) {
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if (owns)
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delete ptr;
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owns = a.owns;
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ptr = a.ptr;
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a.owns = 0;
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}
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}
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#endif
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~auto_ptr() {
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if (owns)
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delete ptr;
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}
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X& operator*() const { return *ptr; }
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X* operator->() const { return ptr; }
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X* get() const { return ptr; }
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X* release() const { owns = false; return ptr; }
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};
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#endif /* _AUTO_PTR_HXX */
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// $Log$
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// Revision 1.1 1999/04/05 21:32:41 curt
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// Initial revision
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//
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// Revision 1.2 1998/09/10 19:07:03 curt
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// /Simulator/Objects/fragment.hxx
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// Nested fgFACE inside fgFRAGMENT since its not used anywhere else.
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//
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// ./Simulator/Objects/material.cxx
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// ./Simulator/Objects/material.hxx
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// Made fgMATERIAL and fgMATERIAL_MGR bona fide classes with private
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// data members - that should keep the rabble happy :)
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//
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// ./Simulator/Scenery/tilemgr.cxx
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// In viewable() delay evaluation of eye[0] and eye[1] in until they're
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// actually needed.
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// Change to fgTileMgrRender() to call fgMATERIAL_MGR::render_fragments()
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// method.
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//
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// ./Include/fg_stl_config.h
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// ./Include/auto_ptr.hxx
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// Added support for g++ 2.7.
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// Further changes to other files are forthcoming.
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//
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// Brief summary of changes required for g++ 2.7.
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// operator->() not supported by iterators: use (*i).x instead of i->x
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// default template arguments not supported,
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// <functional> doesn't have mem_fun_ref() needed by callbacks.
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// some std include files have different names.
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// template member functions not supported.
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//
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// Revision 1.1 1998/08/30 14:12:45 curt
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// Initial revision. Contributed by Bernie Bright.
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//
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