119 lines
2.6 KiB
Text
119 lines
2.6 KiB
Text
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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 pipelineCyclerLinks.I
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* @author drose
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* @date 2006-02-16
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*/
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#ifdef THREADED_PIPELINE
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/**
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*
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*/
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INLINE PipelineCyclerLinks::
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PipelineCyclerLinks() {
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#ifndef NDEBUG
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_next = nullptr;
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_prev = nullptr;
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#endif
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}
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#endif // THREADED_PIPELINE
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#ifdef THREADED_PIPELINE
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/**
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*
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*/
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INLINE PipelineCyclerLinks::
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~PipelineCyclerLinks() {
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nassertv(_next == nullptr && _prev == nullptr);
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}
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#endif // THREADED_PIPELINE
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#ifdef THREADED_PIPELINE
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/**
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* When called on an empty object, sets it up to be the head of a linked list.
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*/
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INLINE void PipelineCyclerLinks::
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make_head() {
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nassertv(_next == nullptr && _prev == nullptr);
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_next = this;
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_prev = this;
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}
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#endif // THREADED_PIPELINE
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#ifdef THREADED_PIPELINE
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/**
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* When called on the head of an empty linked list, resets it to an empty
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* object, for safe destruction.
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*/
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INLINE void PipelineCyclerLinks::
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clear_head() {
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nassertv(_next == this && _prev == this);
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#ifndef NDEBUG
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_next = nullptr;
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_prev = nullptr;
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#endif
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}
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#endif // THREADED_PIPELINE
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#ifdef THREADED_PIPELINE
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/**
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* Removes a PipelineCyclerLinks record from the doubly-linked list.
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*/
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INLINE void PipelineCyclerLinks::
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remove_from_list() {
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nassertv(_prev->_next == this && _next->_prev == this);
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_prev->_next = _next;
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_next->_prev = _prev;
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#ifndef NDEBUG
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_next = nullptr;
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_prev = nullptr;
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#endif
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}
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#endif // THREADED_PIPELINE
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#ifdef THREADED_PIPELINE
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/**
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* Adds a PipelineCyclerLinks record before the indicated node in the doubly-
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* linked list.
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*/
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INLINE void PipelineCyclerLinks::
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insert_before(PipelineCyclerLinks *node) {
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nassertv(node->_prev->_next == node && node->_next->_prev == node);
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nassertv(_prev == nullptr &&
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_next == nullptr);
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_prev = node->_prev;
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_next = node;
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_prev->_next = this;
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node->_prev = this;
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}
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#endif // THREADED_PIPELINE
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#ifdef THREADED_PIPELINE
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/**
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* When called on the head of an empty list, takes all of the leemnts from the
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* indicated list and moves them to this list.
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*/
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INLINE void PipelineCyclerLinks::
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take_list(PipelineCyclerLinks &other) {
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nassertv(_next == this && _prev == this);
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if (other._next == &other && other._prev == &other) {
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// The other list is empty; this is a no-op.
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return;
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}
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other._next->_prev = this;
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other._prev->_next = this;
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_next = other._next;
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_prev = other._prev;
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other._next = &other;
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other._prev = &other;
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}
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#endif // THREADED_PIPELINE
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