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nodeclassptr.h

00001 //
00002 // OpenVRML
00003 //
00004 // Copyright (C) 2000  Braden McDaniel
00005 // 
00006 // This library is free software; you can redistribute it and/or
00007 // modify it under the terms of the GNU Lesser General Public
00008 // License as published by the Free Software Foundation; either
00009 // version 2.1 of the License, or (at your option) any later version.
00010 // 
00011 // This library is distributed in the hope that it will be useful,
00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014 // Lesser General Public License for more details.
00015 // 
00016 // You should have received a copy of the GNU Lesser General Public
00017 // License along with this library; if not, write to the Free Software
00018 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00019 // 
00020 
00021 # ifndef OPENVRML_NODECLASSPTR_H
00022 #   define OPENVRML_NODECLASSPTR_H
00023 
00024 #   include <stddef.h>
00025 #   include <assert.h>
00026 #   include "common.h"
00027 
00028 namespace OpenVRML {
00029 
00030     class NodeClass;
00031 
00032     class OPENVRML_SCOPE NodeClassPtr {
00033         NodeClass * nodeClass;
00034         size_t * count;
00035 
00036     public:
00037         explicit NodeClassPtr(NodeClass * nodeClass = 0);
00038         NodeClassPtr(const NodeClassPtr & nodeClassPtr);
00039         ~NodeClassPtr();
00040 
00041         operator bool() const;
00042 
00043         NodeClassPtr & operator=(const NodeClassPtr & nodeClassPtr);
00044 
00045         bool operator==(const NodeClassPtr & nodeClassPtr) const;
00046 
00047         NodeClass & operator*() const;
00048         NodeClass * operator->() const;
00049         NodeClass * get() const;
00050 
00051         void reset(NodeClass * nodeClass = 0);
00052 
00053     private:
00054         void dispose();
00055     };
00056 
00057     inline NodeClassPtr::~NodeClassPtr() {
00058         this->dispose();
00059     }
00060 
00061     inline NodeClassPtr::operator bool() const {
00062         return this->nodeClass;
00063     }
00064 
00065     inline bool NodeClassPtr::operator==(const NodeClassPtr & nodeClassPtr) const {
00066         return (this->nodeClass == nodeClassPtr.nodeClass);
00067     }
00068 
00069     inline NodeClass & NodeClassPtr::operator*() const {
00070         assert(this->nodeClass);
00071         return *this->nodeClass;
00072     }
00073 
00074     inline NodeClass * NodeClassPtr::operator->() const {
00075         assert(this->nodeClass);
00076         return this->nodeClass;
00077     }
00078 
00079     inline NodeClass * NodeClassPtr::get() const {
00080         assert(this->nodeClass);
00081         return this->nodeClass;
00082     }
00083 }
00084 
00085 # endif