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score: Add red-black tree append/prepend

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These functions are a faster alternative to _RBTree_Insert_inline() if
it is known that the new node is the maximum/minimum node.

Update #4531.
This commit is contained in:
Sebastian Huber
2021-10-22 07:31:46 +02:00
parent 3c0760414e
commit 577262a737
4 changed files with 144 additions and 0 deletions
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26
cpukit/include/rtems/score/rbtreeimpl.h
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@@ -30,6 +30,32 @@ extern "C" {
* @{
*/
/**
* @brief Appends the node to the red-black tree.
*
* The appended node is the new maximum node of the tree. The caller shall
* ensure that the appended node is indeed the maximum node with respect to the
* tree order.
*
* @param[in, out] the_rbtree is the red-black tree control.
*
* @param the_node[out] is the node to append.
*/
void _RBTree_Append( RBTree_Control *the_rbtree, RBTree_Node *the_node );
/**
* @brief Prepends the node to the red-black tree.
*
* The prepended node is the new minimum node of the tree. The caller shall
* ensure that the prepended node is indeed the minimum node with respect to the
* tree order.
*
* @param[in, out] the_rbtree is the red-black tree control.
*
* @param the_node[out] is the node to prepend.
*/
void _RBTree_Prepend( RBTree_Control *the_rbtree, RBTree_Node *the_node );
/**
* @brief Red-black tree visitor.
*

58
cpukit/score/src/rbtreeappend.c Normal file
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@@ -0,0 +1,58 @@
/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSScoreRBTree
*
* @brief This source file contains the implementation of
* _RBTree_Append().
*/
/*
* Copyright (C) 2021 embedded brains GmbH (http://www.embedded-brains.de)
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/score/rbtreeimpl.h>
void _RBTree_Append( RBTree_Control *the_rbtree, RBTree_Node *the_node )
{
RBTree_Node **link;
RBTree_Node *parent;
link = _RBTree_Root_reference( the_rbtree );
parent = NULL;
while ( *link != NULL ) {
parent = *link;
link = _RBTree_Right_reference( parent );
}
_RBTree_Add_child( the_node, parent, link );
_RBTree_Insert_color( the_rbtree, the_node );
}

58
cpukit/score/src/rbtreeprepend.c Normal file
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@@ -0,0 +1,58 @@
/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSScoreRBTree
*
* @brief This source file contains the implementation of
* _RBTree_Prepend().
*/
/*
* Copyright (C) 2021 embedded brains GmbH (http://www.embedded-brains.de)
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/score/rbtreeimpl.h>
void _RBTree_Prepend( RBTree_Control *the_rbtree, RBTree_Node *the_node )
{
RBTree_Node **link;
RBTree_Node *parent;
link = _RBTree_Root_reference( the_rbtree );
parent = NULL;
while ( *link != NULL ) {
parent = *link;
link = _RBTree_Left_reference( parent );
}
_RBTree_Add_child( the_node, parent, link );
_RBTree_Insert_color( the_rbtree, the_node );
}

2
spec/build/cpukit/librtemscpu.yml
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@@ -1477,6 +1477,7 @@ source:
- cpukit/score/src/pheapwalk.c
- cpukit/score/src/processormaskcopy.c
- cpukit/score/src/profilingisrentryexit.c
- cpukit/score/src/rbtreeappend.c
- cpukit/score/src/rbtreeextract.c
- cpukit/score/src/rbtreeinsert.c
- cpukit/score/src/rbtreeiterate.c
@@ -1484,6 +1485,7 @@ source:
- cpukit/score/src/rbtreemin.c
- cpukit/score/src/rbtreenext.c
- cpukit/score/src/rbtreepostorder.c
- cpukit/score/src/rbtreeprepend.c
- cpukit/score/src/rbtreeprev.c
- cpukit/score/src/rbtreereplace.c
- cpukit/score/src/sched.c