94 lines
2.5 KiB
C
94 lines
2.5 KiB
C
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/**
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* PANDA 3D SOFTWARE
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* Copyright (c) Carnegie Mellon University. All rights reserved.
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*
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* All use of this software is subject to the terms of the revised BSD
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* license. You should have received a copy of this license along
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* with this source code in a file named "LICENSE."
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*
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* @file nodeReferenceCount.h
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* @author drose
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* @date 2006-05-01
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*/
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#ifndef NODEREFERENCECOUNT_H
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#define NODEREFERENCECOUNT_H
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#include "pandabase.h"
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#include "referenceCount.h"
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/**
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* This class specializes ReferenceCount to add an additional counter, called
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* node_ref_count, for the purposes of counting the number of times the object
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* is referenced by a "node", whatever that may mean in context.
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*
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* The new methods node_ref() and node_unref() automatically increment and
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* decrement the primary reference count as well. There also exists a
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* NodePointerTo<> class to maintain the node_ref counters automatically.
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*
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* See also CachedTypedWritableReferenceCount, which is similar in principle,
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* as well as NodeCachedReferenceCount, which combines both of these.
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*/
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class EXPCL_PANDA_EXPRESS NodeReferenceCount : public ReferenceCount {
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protected:
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INLINE NodeReferenceCount();
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INLINE NodeReferenceCount(const NodeReferenceCount ©);
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INLINE void operator = (const NodeReferenceCount ©);
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INLINE ~NodeReferenceCount();
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PUBLISHED:
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INLINE int get_node_ref_count() const;
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INLINE void node_ref() const;
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INLINE bool node_unref() const;
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INLINE bool test_ref_count_integrity() const;
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INLINE void node_unref_only() const;
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protected:
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bool do_test_ref_count_integrity() const;
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private:
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mutable AtomicAdjust::Integer _node_ref_count;
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public:
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static TypeHandle get_class_type() {
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return _type_handle;
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}
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static void init_type() {
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ReferenceCount::init_type();
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register_type(_type_handle, "NodeReferenceCount",
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ReferenceCount::get_class_type());
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}
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private:
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static TypeHandle _type_handle;
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};
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template<class RefCountType>
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INLINE void node_unref_delete(RefCountType *ptr);
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/**
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* This works like RefCountObj, but it inherits from NodeReferenceCount
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* instead of ReferenceCount.
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*/
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template<class Base>
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class NodeRefCountObj : public NodeReferenceCount, public Base {
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public:
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INLINE NodeRefCountObj();
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INLINE NodeRefCountObj(const Base ©);
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ALLOC_DELETED_CHAIN(NodeRefCountObj<Base>);
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static TypeHandle get_class_type() {
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return _type_handle;
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}
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static void init_type();
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private:
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static TypeHandle _type_handle;
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};
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#include "nodeReferenceCount.I"
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#endif
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