118 lines
2.6 KiB
Text
118 lines
2.6 KiB
Text
/**
|
|
* PANDA 3D SOFTWARE
|
|
* Copyright (c) Carnegie Mellon University. All rights reserved.
|
|
*
|
|
* All use of this software is subject to the terms of the revised BSD
|
|
* license. You should have received a copy of this license along
|
|
* with this source code in a file named "LICENSE."
|
|
*
|
|
* @file pipelineCyclerLinks.I
|
|
* @author drose
|
|
* @date 2006-02-16
|
|
*/
|
|
|
|
#ifdef THREADED_PIPELINE
|
|
/**
|
|
*
|
|
*/
|
|
INLINE PipelineCyclerLinks::
|
|
PipelineCyclerLinks() {
|
|
#ifndef NDEBUG
|
|
_next = nullptr;
|
|
_prev = nullptr;
|
|
#endif
|
|
}
|
|
#endif // THREADED_PIPELINE
|
|
|
|
#ifdef THREADED_PIPELINE
|
|
/**
|
|
*
|
|
*/
|
|
INLINE PipelineCyclerLinks::
|
|
~PipelineCyclerLinks() {
|
|
nassertv(_next == nullptr && _prev == nullptr);
|
|
}
|
|
#endif // THREADED_PIPELINE
|
|
|
|
#ifdef THREADED_PIPELINE
|
|
/**
|
|
* When called on an empty object, sets it up to be the head of a linked list.
|
|
*/
|
|
INLINE void PipelineCyclerLinks::
|
|
make_head() {
|
|
nassertv(_next == nullptr && _prev == nullptr);
|
|
_next = this;
|
|
_prev = this;
|
|
}
|
|
#endif // THREADED_PIPELINE
|
|
|
|
#ifdef THREADED_PIPELINE
|
|
/**
|
|
* When called on the head of an empty linked list, resets it to an empty
|
|
* object, for safe destruction.
|
|
*/
|
|
INLINE void PipelineCyclerLinks::
|
|
clear_head() {
|
|
nassertv(_next == this && _prev == this);
|
|
#ifndef NDEBUG
|
|
_next = nullptr;
|
|
_prev = nullptr;
|
|
#endif
|
|
}
|
|
#endif // THREADED_PIPELINE
|
|
|
|
#ifdef THREADED_PIPELINE
|
|
/**
|
|
* Removes a PipelineCyclerLinks record from the doubly-linked list.
|
|
*/
|
|
INLINE void PipelineCyclerLinks::
|
|
remove_from_list() {
|
|
nassertv(_prev->_next == this && _next->_prev == this);
|
|
_prev->_next = _next;
|
|
_next->_prev = _prev;
|
|
#ifndef NDEBUG
|
|
_next = nullptr;
|
|
_prev = nullptr;
|
|
#endif
|
|
}
|
|
#endif // THREADED_PIPELINE
|
|
|
|
#ifdef THREADED_PIPELINE
|
|
/**
|
|
* Adds a PipelineCyclerLinks record before the indicated node in the doubly-
|
|
* linked list.
|
|
*/
|
|
INLINE void PipelineCyclerLinks::
|
|
insert_before(PipelineCyclerLinks *node) {
|
|
nassertv(node->_prev->_next == node && node->_next->_prev == node);
|
|
nassertv(_prev == nullptr &&
|
|
_next == nullptr);
|
|
_prev = node->_prev;
|
|
_next = node;
|
|
_prev->_next = this;
|
|
node->_prev = this;
|
|
}
|
|
#endif // THREADED_PIPELINE
|
|
|
|
#ifdef THREADED_PIPELINE
|
|
/**
|
|
* When called on the head of an empty list, takes all of the leemnts from the
|
|
* indicated list and moves them to this list.
|
|
*/
|
|
INLINE void PipelineCyclerLinks::
|
|
take_list(PipelineCyclerLinks &other) {
|
|
nassertv(_next == this && _prev == this);
|
|
if (other._next == &other && other._prev == &other) {
|
|
// The other list is empty; this is a no-op.
|
|
return;
|
|
}
|
|
|
|
other._next->_prev = this;
|
|
other._prev->_next = this;
|
|
_next = other._next;
|
|
_prev = other._prev;
|
|
|
|
other._next = &other;
|
|
other._prev = &other;
|
|
}
|
|
#endif // THREADED_PIPELINE
|