83 lines
2.8 KiB
Plaintext
83 lines
2.8 KiB
Plaintext
// Filename: p3dReferenceCount.I
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// Created by: drose (09Jul09)
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//
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////////////////////////////////////////////////////////////////////
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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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////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////
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// Function: P3DReferenceCount::Constructor
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// Access: Public
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// Description:
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////////////////////////////////////////////////////////////////////
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inline P3DReferenceCount::
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P3DReferenceCount() {
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_ref_count = 0;
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}
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////////////////////////////////////////////////////////////////////
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// Function: P3DReferenceCount::Destructor
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// Access: Public
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// Description:
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////////////////////////////////////////////////////////////////////
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inline P3DReferenceCount::
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~P3DReferenceCount() {
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assert(_ref_count == 0);
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}
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////////////////////////////////////////////////////////////////////
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// Function: P3DReferenceCount::ref
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// Access: Public
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// Description: Explicitly increments the reference count.
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////////////////////////////////////////////////////////////////////
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inline void P3DReferenceCount::
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ref() const {
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++((P3DReferenceCount *)this)->_ref_count;
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}
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////////////////////////////////////////////////////////////////////
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// Function: P3DReferenceCount::unref
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// Access: Public
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// Description: Explicitly decrements the reference count. Usually,
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// you should call p3d_unref_delete() instead.
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//
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// The return value is true if the new reference count
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// is nonzero, false if it is zero.
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////////////////////////////////////////////////////////////////////
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inline bool P3DReferenceCount::
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unref() const {
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return --(((P3DReferenceCount *)this)->_ref_count) != 0;
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}
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////////////////////////////////////////////////////////////////////
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// Function: P3DReferenceCount::get_ref_count
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// Access: Public
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// Description: Returns the current reference count.
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////////////////////////////////////////////////////////////////////
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inline int P3DReferenceCount::
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get_ref_count() const {
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return _ref_count;
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}
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////////////////////////////////////////////////////////////////////
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// Function: p3d_unref_delete
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// Description: This global helper function will unref the given
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// P3DReferenceCount object, and if the reference count
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// reaches zero, automatically delete it.
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////////////////////////////////////////////////////////////////////
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template<class RefCountType>
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inline void
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p3d_unref_delete(RefCountType *ptr) {
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if (!ptr->unref()) {
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delete ptr;
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}
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}
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