0cf3f85364
(Patsburg) integrated SAS controller. sys/dev/isci contains all files specific to FreeBSD. sys/dev/isci/scil contains OS-agnostic library maintained by Intel and modified to best integrate into FreeBSD kernel build environment. Sponsored by: Intel Reviewed by: scottl
600 lines
16 KiB
C
600 lines
16 KiB
C
/*-
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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* The full GNU General Public License is included in this distribution
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* in the file called LICENSE.GPL.
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*
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* BSD LICENSE
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/**
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* @file
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*
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* @brief This file contains the implementation of an abstract list class.
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* This class will allow for the same item to occur multiple times in
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* the list. It will provide an interface that is similar to the
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* C++ standard template list interface.
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*/
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//******************************************************************************
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//*
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//* I N C L U D E S
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//*
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//******************************************************************************
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#include <dev/isci/scil/sci_abstract_list.h>
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//******************************************************************************
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//*
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//* P R I V A T E M E M B E R S
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//*
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//******************************************************************************
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//******************************************************************************
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//*
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//* P R O T E C T E D M E T H O D S
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//*
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//******************************************************************************
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/**
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* @brief Initialize the abstract list
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*
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* @pre The supplied free pool should be constructed prior to utilization
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* of this abstract list. It isn't mandatory for the free pool to be
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* constructed before invoking this method, but suggested.
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*
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* @param[in] list This parameter specifies the abstract list to be
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* constructed.
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* @param[in] free_pool This parameter specifies the free pool to be
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* utilized as the repository of free elements for list usage.
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*
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* @return none
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*/
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void sci_abstract_list_construct(
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SCI_ABSTRACT_LIST_T * list,
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SCI_ABSTRACT_ELEMENT_POOL_T * free_pool
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)
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{
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memset(list, 0, sizeof(SCI_ABSTRACT_LIST_T));
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list->free_pool = free_pool;
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}
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/**
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* Initialize the abstract list with its free pool
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*
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* @param[in] pool
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* the free pool from which the elements will be extracted
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* @param[in] list_elements
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* the array of list elements to be added to the free list
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* @param[in] element_count
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* the count of the elements to be added to the free list these should be
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* the same as the array size of list elements
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*
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* @return none
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*/
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void sci_abstract_element_pool_construct(
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SCI_ABSTRACT_ELEMENT_POOL_T * pool,
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SCI_ABSTRACT_ELEMENT_T * list_elements,
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int element_count
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)
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{
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int index;
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memset(pool, 0, sizeof(SCI_ABSTRACT_ELEMENT_POOL_T));
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memset(list_elements, 0, sizeof(SCI_ABSTRACT_ELEMENT_T) * element_count);
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pool->elements = list_elements;
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pool->max_elements = element_count;
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// Loop through all of the elements in the array and push them onto the
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// pool's free list.
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for (index = element_count - 1; index >= 0; index--)
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{
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private_pool_free(pool, &(list_elements[index]));
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}
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}
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#ifdef USE_ABSTRACT_LIST_FUNCTIONS
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//******************************************************************************
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//*
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//* P U B L I C M E T H O D S
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//*
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//******************************************************************************
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/**
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* Simply return the front element pointer of the list. This returns an element
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* element as opposed to what the element is pointing to.
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*/
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SCI_ABSTRACT_ELEMENT_T * sci_abstract_list_get_front(
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SCI_ABSTRACT_LIST_T * list_p
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)
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{
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return (list_p)->elements.front_p;
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}
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/**
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* This method simply returns the object pointed to by the head (front) of
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* the list.
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*/
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void * sci_abstract_list_front(
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SCI_ABSTRACT_LIST_T * list_p
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)
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{
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return
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( ( (list_p)->elements.front_p ) ? ((list_p)->elements.front_p->object_p) : NULL );
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}
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/**
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* This method simply returns the object pointed to by the tail (back) of
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* the list.
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*/
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void * sci_abstract_list_back(
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SCI_ABSTRACT_LIST_T * list_p
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)
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{
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return
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( ( (list_p)->elements.back_p ) ? ((list_p)->elements.back_p->object_p) : NULL );
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}
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/**
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* This method will return FALSE if the list is not empty.
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*/
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BOOL sci_abstract_list_is_empty(
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SCI_ABSTRACT_LIST_T * list_p
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)
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{
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return ( (list_p)->elements.front_p == NULL );
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}
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/**
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* This method will return the number of elements queued in the list.
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*/
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U32 sci_abstract_list_size(
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SCI_ABSTRACT_LIST_T * list_p
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)
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{
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return ( (list_p)->elements.size );
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}
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/**
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* This method simply returns the next list element in the list.
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*/
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SCI_ABSTRACT_ELEMENT_T * sci_abstract_list_get_next(
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SCI_ABSTRACT_ELEMENT_T * alElement_p
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)
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{
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return ( (alElement_p)->next_p );
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}
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#if defined(SCI_LOGGING)
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/**
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* This method simply prints the contents of the list.
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*/
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void sci_abstract_list_print(
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SCI_ABSTRACT_LIST_T * list_p
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)
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{
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SCI_ABSTRACT_ELEMENT_T * alElement_p = list_p->elements.front_p;
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while (alElement_p != NULL)
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{
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#ifdef UNIT_TEST_DEBUG
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/* Check to see if we found the object for which we are searching. */
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printf("ITEM next_p 0x%x prev_p 0x%x obj_p 0x%x, 0x%x\n",
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alElement_p->next_p,
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alElement_p->previous_p,
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(U32*) (alElement_p->object_p));
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#endif
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alElement_p = alElement_p->next_p;
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}
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}
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#endif // defined(SCI_LOGGING)
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/**
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* This method will simply search the supplied list for the desired object.
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* It will return a pointer to the object, if it is found. Otherwise
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* it will return NULL.
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*/
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void * sci_abstract_list_find(
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SCI_ABSTRACT_LIST_T * list_p,
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void * obj_p
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)
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{
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return
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sci_abstract_list_get_object(private_find(&(list_p)->elements, (obj_p)));
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}
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/**
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* This method will simply remove the element at the back (tail) of the list.
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* It will return a pointer to the object that was removed or NULL if not
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* found.
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*/
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void * sci_abstract_list_popback(
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SCI_ABSTRACT_LIST_T * list_p
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)
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{
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SCI_ABSTRACT_ELEMENT_LIST_T * elem_list = &(list_p)->elements;
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SCI_ABSTRACT_ELEMENT_T * alElement_p = elem_list->back_p;
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void * obj_p = NULL;
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if (alElement_p != NULL)
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{
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obj_p = alElement_p->object_p;
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if (elem_list->back_p == elem_list->front_p)
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{
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elem_list->back_p = elem_list->front_p = NULL;
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}
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else
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{
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elem_list->back_p = elem_list->back_p->previous_p;
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elem_list->back_p->next_p = NULL;
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}
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elem_list->size--;
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private_pool_free((list_p)->free_pool, alElement_p);
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}
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return obj_p;
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}
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/**
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* This method simply removes the list element at the head of the list
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* and returns the pointer to the object that was removed.
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*/
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void * sci_abstract_list_popfront(
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SCI_ABSTRACT_LIST_T * list_p
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)
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{
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SCI_ABSTRACT_ELEMENT_T * alElement_p =
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private_pop_front(&(list_p)->elements);
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void * obj_p = NULL;
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if (alElement_p != NULL)
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{
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obj_p = alElement_p->object_p;
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private_pool_free((list_p)->free_pool, alElement_p);
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}
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return obj_p;
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}
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/**
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* This method will erase (remove) all instances of the supplied object from
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* anywhere in the list.
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*/
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void sci_abstract_list_erase(
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SCI_ABSTRACT_LIST_T * list_p,
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void * obj_p
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)
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{
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SCI_ABSTRACT_ELEMENT_LIST_T * elem_list = &(list_p)->elements;
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SCI_ABSTRACT_ELEMENT_T * alElement_p;
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while ((alElement_p = private_find(elem_list, (obj_p))) != NULL)
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{
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if (alElement_p == elem_list->front_p)
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{
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sci_abstract_list_popfront(list_p);
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}
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else if (alElement_p == elem_list->back_p)
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{
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sci_abstract_list_popback(list_p);
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}
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else
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{
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alElement_p->previous_p->next_p = alElement_p->next_p;
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alElement_p->next_p->previous_p = alElement_p->previous_p;
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elem_list->size--;
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private_pool_free((list_p)->free_pool, alElement_p);
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}
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}
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return;
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}
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/**
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* This method simply adds a LIST_ELEMENT for the supplied object to the back
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* (tail) of the supplied list.
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*/
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void sci_abstract_list_pushback(
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SCI_ABSTRACT_LIST_T * list_p,
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void * obj_p
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)
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{
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SCI_ABSTRACT_ELEMENT_LIST_T * elem_list = &(list_p)->elements;
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SCI_ABSTRACT_ELEMENT_T * alElement_p
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= private_pool_allocate((list_p)->free_pool);
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// assert(alElement_p != NULL);
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alElement_p->object_p = (obj_p);
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if (elem_list->front_p == NULL)
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{
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elem_list->front_p = elem_list->back_p = alElement_p;
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}
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else
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{
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elem_list->back_p->next_p = alElement_p;
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alElement_p->previous_p = elem_list->back_p;
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elem_list->back_p = alElement_p;
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}
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elem_list->size++;
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}
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/**
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* This method simply adds a LIST_ELEMENT for the supplied object to the front
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* (head) of the supplied list.
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*/
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void sci_abstract_list_pushfront(
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SCI_ABSTRACT_LIST_T * list_p,
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void * obj_p
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)
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{
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SCI_ABSTRACT_ELEMENT_T * alElement_p =
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private_pool_allocate((list_p)->free_pool);
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alElement_p->object_p = (obj_p);
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private_push_front(&(list_p)->elements, alElement_p);
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}
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/**
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* This method will add the objToAdd_p object to the list before the obj_p.
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*
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*/
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void sci_abstract_list_insert(
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SCI_ABSTRACT_LIST_T * list_p,
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void * obj_p,
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void * objToAdd_p
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)
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{
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SCI_ABSTRACT_ELEMENT_LIST_T * elem_list = &(list_p)->elements;
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SCI_ABSTRACT_ELEMENT_T * obj_element = private_find(elem_list, obj_p);
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SCI_ABSTRACT_ELEMENT_T * objToAdd_element =
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private_pool_allocate((list_p)->free_pool);
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objToAdd_element->object_p = objToAdd_p;
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ASSERT(obj_element != NULL);
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ASSERT(objToAdd_element != NULL);
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if (obj_element == elem_list->front_p)
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{
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objToAdd_element->object_p = (objToAdd_p);
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private_push_front(&(list_p)->elements, objToAdd_element);
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}
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else
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{
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obj_element->previous_p->next_p = objToAdd_element;
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objToAdd_element->previous_p = obj_element->previous_p;
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obj_element->previous_p = objToAdd_element;
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objToAdd_element->next_p = obj_element;
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elem_list->size++;
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}
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}
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/**
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* This method simply frees all the items from the list.
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*/
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void sci_abstract_list_clear(
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SCI_ABSTRACT_LIST_T * list_p
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)
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{
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while ((list_p)->elements.size > 0)
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sci_abstract_list_popfront((list_p));
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}
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/**
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* This method simply returns the object being pointed to by the list element
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* (The item being listed).
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*/
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void * sci_abstract_list_get_object(
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SCI_ABSTRACT_ELEMENT_T * alElement_p
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)
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{
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void * obj_p = NULL;
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if ((alElement_p) != NULL)
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obj_p = (alElement_p)->object_p;
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return obj_p;
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}
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/**
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* This method is simply a wrapper to provide the number of elements in
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* the free list.
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*/
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U32 sci_abstract_list_freeList_size(
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SCI_ABSTRACT_LIST_T * freeList
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)
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{
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return (sci_abstract_list_size(freeList));
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}
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//******************************************************************************
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//*
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//* P R I V A T E M E T H O D S
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//*
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//******************************************************************************
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/**
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* This method simply performs the common portion of pushing a list element
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* onto a list.
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*
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* WARNING: This is a private helper method that should not be called directly
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* by any users.
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*/
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void private_push_front(
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SCI_ABSTRACT_ELEMENT_LIST_T * privateList_p,
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SCI_ABSTRACT_ELEMENT_T * alElement_p
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)
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{
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if ((privateList_p)->front_p == NULL)
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{
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(privateList_p)->front_p = (privateList_p)->back_p = (alElement_p);
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(alElement_p)->next_p = (alElement_p)->previous_p = NULL;
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}
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else
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{
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(alElement_p)->next_p = (privateList_p)->front_p;
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(alElement_p)->previous_p = NULL;
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(privateList_p)->front_p->previous_p = (alElement_p);
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(privateList_p)->front_p = (alElement_p);
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}
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(privateList_p)->size++;
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}
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/**
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* This method simply performs the common portion of popping a list element
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* from a list.
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*
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* WARNING: This is a private helper method that should not be called directly
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* by any users.
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*/
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SCI_ABSTRACT_ELEMENT_T * private_pop_front(
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SCI_ABSTRACT_ELEMENT_LIST_T * privateList_p
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)
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{
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SCI_ABSTRACT_ELEMENT_T * alElement_p = (privateList_p)->front_p;
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if (alElement_p != NULL)
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{
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if ((privateList_p)->front_p == (privateList_p)->back_p)
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{
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(privateList_p)->front_p = (privateList_p)->back_p = NULL;
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}
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else
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{
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(privateList_p)->front_p = (privateList_p)->front_p->next_p;
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(privateList_p)->front_p->previous_p = NULL;
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}
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(privateList_p)->size--;
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}
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return alElement_p;
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}
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/**
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* This method will simply search the supplied list for the desired object.
|
|
* It will return a pointer to the abstract_list_element if found, otherwise
|
|
* it will return NULL.
|
|
*/
|
|
SCI_ABSTRACT_ELEMENT_T * private_find(
|
|
SCI_ABSTRACT_ELEMENT_LIST_T * list_p,
|
|
void * obj_p
|
|
)
|
|
{
|
|
SCI_ABSTRACT_ELEMENT_T * alElement_p = (list_p)->front_p;
|
|
|
|
while (alElement_p != NULL)
|
|
{
|
|
/* Check to see if we found the object for which we are searching. */
|
|
if (alElement_p->object_p == (void*) (obj_p))
|
|
{
|
|
break;
|
|
}
|
|
|
|
alElement_p = alElement_p->next_p;
|
|
}
|
|
|
|
return alElement_p;
|
|
}
|
|
|
|
/**
|
|
* This private method will free the supplied list element back to the pool
|
|
* of free list elements.
|
|
*/
|
|
void private_pool_free(
|
|
SCI_ABSTRACT_ELEMENT_POOL_T * free_pool,
|
|
SCI_ABSTRACT_ELEMENT_T * alElement_p
|
|
)
|
|
{
|
|
/* Push the list element back to the head to get better locality of */
|
|
/* reference with the cache. */
|
|
private_push_front(&(free_pool)->free_list, (alElement_p));
|
|
}
|
|
|
|
/**
|
|
* This private method will allocate a list element from the pool of free
|
|
* list elements.
|
|
*/
|
|
SCI_ABSTRACT_ELEMENT_T * private_pool_allocate(
|
|
SCI_ABSTRACT_ELEMENT_POOL_T * free_pool
|
|
)
|
|
{
|
|
SCI_ABSTRACT_ELEMENT_T * alElement_p;
|
|
|
|
alElement_p = private_pop_front(&(free_pool)->free_list);
|
|
|
|
alElement_p->next_p = NULL;
|
|
alElement_p->previous_p = NULL;
|
|
alElement_p->object_p = NULL;
|
|
|
|
return alElement_p;
|
|
}
|
|
|
|
#endif // USE_ABSTRACT_LIST_FUNCTIONS
|