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/*-
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
* The full GNU General Public License is included in this distribution
* in the file called LICENSE.GPL.
*
* BSD LICENSE
*
* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
*
* $FreeBSD: release/9.1.0/sys/dev/isci/scil/sci_abstract_list.h 231689 2012-02-14 15:58:49Z jimharris $
*/
/**
* @file
*
* @brief This file contains the interface to the abstract list class.
* This class will allow for the same item to occur multiple times in
* a list or multiple lists. It will provide an interface that is
* similar to the C++ standard template list interface.
* Methods Provided:
* - sci_abstract_list_front()
* - sci_abstract_list_back()
* - sci_abstract_list_is_empty()
* - sci_abstract_list_size()
* - sci_abstract_list_print()
* - sci_abstract_list_find()
* - sci_abstract_list_popback()
* - sci_abstract_list_popfront()
* - sci_abstract_list_erase()
* - sci_abstract_list_pushback()
* - sci_abstract_list_pushfront()
* - sci_abstract_list_get_object()
* - sci_abstract_list_get_next()
* - sci_abstract_list_insert() UNIMPLEMENTED
* - sci_abstract_list_clear()
*/
#ifndef _SCI_ABSTRACT_LIST_H_
#define _SCI_ABSTRACT_LIST_H_
//******************************************************************************
//*
//* I N C L U D E S
//*
//******************************************************************************
#include <dev/isci/scil/sci_types.h>
//******************************************************************************
//*
//* C O N S T A N T S
//*
//******************************************************************************
//******************************************************************************
//*
//* T Y P E S
//*
//******************************************************************************
/**
* @struct SCI_ABSTRACT_ELEMENT
*
* @brief This object represents an element of a abstract list.
* NOTE: This structure does not evenly align on a cache line
* boundary. If SSP specific code ends up using this list,
* then it may be a good idea to force the alignment. Now
* it is more important to save the space.
*/
typedef struct SCI_ABSTRACT_ELEMENT
{
/**
* This field points to the next item in the abstract_list.
*/
struct SCI_ABSTRACT_ELEMENT * next_p;
/**
* This field points to the previous item in the abstract_list.
*/
struct SCI_ABSTRACT_ELEMENT * previous_p;
/**
* This field points to the object the list is managing (i.e. the thing
* being listed).
*/
void * object_p;
} SCI_ABSTRACT_ELEMENT_T;
/**
* @struct SCI_ABSTRACT_ELEMENT_LIST
*
* @brief This object represents an element list object. It can have
* elements added and removed from it.
*/
typedef struct SCI_ABSTRACT_ELEMENT_LIST
{
/**
* Pointer to the front (head) of the list.
*/
SCI_ABSTRACT_ELEMENT_T * front_p;
/**
* Pointer to the back (tail) of the list.
*/
SCI_ABSTRACT_ELEMENT_T * back_p;
/**
* This field depicts the number of elements in this list.
* NOTE: It is possible to remove this field and replace it with a
* linear walking of the list to determine the size, but since
* there aren't many lists in the system we don't utilize much
* space.
*/
U32 size;
} SCI_ABSTRACT_ELEMENT_LIST_T;
/**
* @struct SCI_ABSTRACT_ELEMENT_POOL
*
* @brief This structure provides the pool of free abstract elements to be
* utilized by an SCI_ABSTRACT_LIST.
*/
typedef struct SCI_ABSTRACT_ELEMENT_POOL
{
/**
* Pointer to an array of elements to be managed by this pool. This
* array acts as the memory store for the elements in the free pool or
* allocated out of the pool into an SCI_ABSTRACT_LIST.
*/
SCI_ABSTRACT_ELEMENT_T * elements;
/**
* This field contains the maximum number of free elements for the pool.
* It is set at creation of the pool and should not be changed afterward.
*/
U32 max_elements;
/**
* Pointer to the list of free elements that can be allocated from
* the pool.
*/
struct SCI_ABSTRACT_ELEMENT_LIST free_list;
} SCI_ABSTRACT_ELEMENT_POOL_T;
/**
* @struct SCI_ABSTRACT_LIST
*
* @brief This object provides the ability to queue any type of object or
* even the same object multiple times. The object must be provided
* an element pool from which to draw free elements.
*/
typedef struct SCI_ABSTRACT_LIST
{
/**
* This represents the elements currently managed by the list.
*/
SCI_ABSTRACT_ELEMENT_LIST_T elements;
/**
* This field contains elements that are currently available for
* allocation into the list of elements;
*/
SCI_ABSTRACT_ELEMENT_POOL_T * free_pool;
} SCI_ABSTRACT_LIST_T;
//******************************************************************************
//*
//* P R O T E C T E D M E T H O D S
//*
//******************************************************************************
void sci_abstract_element_pool_construct(
SCI_ABSTRACT_ELEMENT_POOL_T * pool,
SCI_ABSTRACT_ELEMENT_T * list_elements,
int element_count
);
void sci_abstract_list_construct(
SCI_ABSTRACT_LIST_T * list,
SCI_ABSTRACT_ELEMENT_POOL_T * free_pool
);
#ifdef USE_ABSTRACT_LIST_FUNCTIONS
//******************************************************************************
//*
//* P U B L I C M E T H O D S
//*
//******************************************************************************
/**
* Simply return the front element pointer of the list. This returns an element
* element as opposed to what the element is pointing to.
*/
SCI_ABSTRACT_ELEMENT_T * sci_abstract_list_get_front(
SCI_ABSTRACT_LIST_T * list_p
);
/**
* This method simply returns the object pointed to by the head (front) of
* the list.
*/
void * sci_abstract_list_front(
SCI_ABSTRACT_LIST_T * list_p
);
/**
* This method simply returns the object pointed to by the tail (back) of
* the list.
*/
void * sci_abstract_list_back(
SCI_ABSTRACT_LIST_T * list_p
);
/**
* This method will return FALSE if the list is not empty.
*/
BOOL sci_abstract_list_is_empty(
SCI_ABSTRACT_LIST_T * list_p
);
/**
* This method will return the number of elements queued in the list.
*/
U32 sci_abstract_list_size(
SCI_ABSTRACT_LIST_T * list_p
);
/**
* This method simply returns the next list element in the list.
*/
SCI_ABSTRACT_ELEMENT_T * sci_abstract_list_get_next(
SCI_ABSTRACT_ELEMENT_T * alElement_p
);
/**
* This method simply prints the contents of the list.
*/
void sci_abstract_list_print(
SCI_ABSTRACT_LIST_T * list_p
);
/**
* This method will simply search the supplied list for the desired object.
* It will return a pointer to the object, if it is found. Otherwise
* it will return NULL.
*/
void * sci_abstract_list_find(
SCI_ABSTRACT_LIST_T * list_p,
void * obj_p
);
/**
* This method will simply remove the element at the back (tail) of the list.
* It will return a pointer to the object that was removed or NULL if not
* found.
*/
void * sci_abstract_list_popback(
SCI_ABSTRACT_LIST_T * list_p
);
/**
* This method simply removes the list element at the head of the list
* and returns the pointer to the object that was removed.
*/
void * sci_abstract_list_popfront(
SCI_ABSTRACT_LIST_T * list_p
);
/**
* This method will erase (remove) all instances of the supplied object from
* anywhere in the list.
*/
void sci_abstract_list_erase(
SCI_ABSTRACT_LIST_T * list_p,
void * obj_p
);
/**
* This method simply adds a LIST_ELEMENT for the supplied object to the back
* (tail) of the supplied list.
*/
void sci_abstract_list_pushback(
SCI_ABSTRACT_LIST_T * list_p,
void * obj_p
);
/**
* This method simply adds a LIST_ELEMENT for the supplied object to the front
* (head) of the supplied list.
*/
void sci_abstract_list_pushfront(
SCI_ABSTRACT_LIST_T * list_p,
void * obj_p
);
/**
* This method will add the objToAdd_p object to the list before the obj_p.
* NOTE: UNIMPLEMENTED
*/
void sci_abstract_list_insert(
SCI_ABSTRACT_LIST_T * list_p,
void * obj_p,
void * objToAdd_p
);
/**
* This method simply frees all the items from the list.
*/
void sci_abstract_list_clear(
SCI_ABSTRACT_LIST_T * list_p
);
/**
* This method simply returns the object being pointed to by the list element
* (The item being listed).
*/
void * sci_abstract_list_get_object(
SCI_ABSTRACT_ELEMENT_T * alElement_p
);
/**
* This method is simply a wrapper to provide the number of elements in
* the free list.
*/
U32 sci_abstract_list_freeList_size(
SCI_ABSTRACT_LIST_T * freeList
);
//******************************************************************************
//*
//* P R I V A T E M E T H O D S
//*
//******************************************************************************
/**
* This method simply performs the common portion of pushing a list element
* onto a list.
*
* WARNING: This is a private helper method that should not be called directly
* by any users.
*/
void private_push_front(
SCI_ABSTRACT_ELEMENT_LIST_T * privateList_p,
SCI_ABSTRACT_ELEMENT_T * alElement_p
);
/**
* This method simply performs the common portion of popping a list element
* from a list.
*
* WARNING: This is a private helper method that should not be called directly
* by any users.
*/
SCI_ABSTRACT_ELEMENT_T * private_pop_front(
SCI_ABSTRACT_ELEMENT_LIST_T * privateList_p
);
/**
* 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
);
/**
* 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
);
/**
* 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
);
#else
//******************************************************************************
//*
//* P U B L I C M E T H O D S
//*
//******************************************************************************
/**
* Simply return the front element pointer of the list. This returns an element
* element as opposed to what the element is pointing to.
*/
#define sci_abstract_list_get_front( \
list_p \
) \
((list_p)->elements.front_p)
/**
* This method simply returns the object pointed to by the head (front) of
* the list.
*/
#define sci_abstract_list_front( \
list_p \
) \
( ( (list_p)->elements.front_p ) ? ((list_p)->elements.front_p->object_p) : NULL )
/**
* This method simply returns the object pointed to by the tail (back) of
* the list.
*/
#define sci_abstract_list_back( \
list_p \
) \
( ( (list_p)->elements.back_p ) ? ((list_p)->elements.back_p->object_p) : NULL )
/**
* This method will return FALSE if the list is not empty.
*/
#define sci_abstract_list_is_empty( \
list_p \
) \
( (list_p)->elements.front_p == NULL )
/**
* This method will return the number of elements queued in the list.
*/
#define sci_abstract_list_size( \
list_p \
) \
( (list_p)->elements.size )
/**
* This method simply returns the next list element in the list.
*/
#define sci_abstract_list_get_next( \
alElement_p \
) \
( (alElement_p)->next_p )
/**
* This method simply prints the contents of the list.
*/
#define sci_abstract_list_print( \
list_p \
) \
{ \
SCI_ABSTRACT_ELEMENT_T * alElement_p = list_p->elements.front_p; \
\
while (alElement_p != NULL) \
{ \
/* Check to see if we found the object for which we are searching. */ \
printf("ITEM next_p 0x%x prev_p 0x%x obj_p 0x%x, 0x%x\n", \
alElement_p->next_p, \
alElement_p->previous_p, \
(U32*) (alElement_p->object_p)); \
\
alElement_p = alElement_p->next_p; \
} \
}
/**
* This method will simply search the supplied list for the desired object.
* It will return a pointer to the object, if it is found. Otherwise
* it will return NULL.
*/
#define sci_abstract_list_find( \
list_p, \
obj_p \
) \
({ \
sci_abstract_list_get_object(private_find(&(list_p)->elements, (obj_p))); \
})
/**
* This method will simply remove the element at the back (tail) of the list.
* It will return a pointer to the object that was removed or NULL if not
* found.
*/
#define sci_abstract_list_popback( \
list_p \
) \
({ \
SCI_ABSTRACT_ELEMENT_LIST_T * elem_list = &(list_p)->elements; \
SCI_ABSTRACT_ELEMENT_T * alElement_p = elem_list->back_p; \
void * obj_p = NULL; \
\
if (alElement_p != NULL) \
{ \
obj_p = alElement_p->object_p; \
if (elem_list->back_p == elem_list->front_p) \
{ \
elem_list->back_p = elem_list->front_p = NULL; \
} \
else \
{ \
elem_list->back_p = elem_list->back_p->previous_p; \
elem_list->back_p->next_p = NULL; \
} \
\
elem_list->size--; \
private_pool_free((list_p)->free_pool, alElement_p); \
} \
\
obj_p; \
})
/**
* This method simply removes the list element at the head of the list
* and returns the pointer to the object that was removed.
*/
#define sci_abstract_list_popfront( \
list_p \
) \
({ \
SCI_ABSTRACT_ELEMENT_T * alElement_p = \
private_pop_front(&(list_p)->elements); \
void * obj_p = NULL; \
\
if (alElement_p != NULL) \
{ \
obj_p = alElement_p->object_p; \
private_pool_free((list_p)->free_pool, alElement_p); \
} \
\
obj_p; \
})
/**
* This method will erase (remove) all instances of the supplied object from
* anywhere in the list.
*/
#define sci_abstract_list_erase( \
list_p, \
obj_p \
) \
{ \
SCI_ABSTRACT_ELEMENT_LIST_T * elem_list = &(list_p)->elements; \
SCI_ABSTRACT_ELEMENT_T * alElement_p; \
\
while ((alElement_p = private_find(elem_list, (obj_p))) != NULL) \
{ \
if (alElement_p == elem_list->front_p) \
{ \
sci_abstract_list_popfront(list_p); \
} \
else if (alElement_p == elem_list->back_p) \
{ \
sci_abstract_list_popback(list_p); \
} \
else \
{ \
alElement_p->previous_p->next_p = alElement_p->next_p; \
alElement_p->next_p->previous_p = alElement_p->previous_p; \
elem_list->size--; \
private_pool_free((list_p)->free_pool, alElement_p); \
} \
} \
}
/**
* This method simply adds a LIST_ELEMENT for the supplied object to the back
* (tail) of the supplied list.
*/
#define sci_abstract_list_pushback( \
list_p, \
obj_p \
) \
{ \
SCI_ABSTRACT_ELEMENT_LIST_T * elem_list = &(list_p)->elements; \
SCI_ABSTRACT_ELEMENT_T * alElement_p \
= private_pool_allocate((list_p)->free_pool); \
assert(alElement_p != NULL); \
\
alElement_p->object_p = (obj_p); \
\
if (elem_list->front_p == NULL) \
{ \
elem_list->front_p = elem_list->back_p = alElement_p; \
} \
else \
{ \
elem_list->back_p->next_p = alElement_p; \
alElement_p->previous_p = elem_list->back_p; \
elem_list->back_p = alElement_p; \
} \
\
elem_list->size++; \
}
/**
* This method simply adds a LIST_ELEMENT for the supplied object to the front
* (head) of the supplied list.
*/
#define sci_abstract_list_pushfront( \
list_p, \
obj_p \
) \
{ \
SCI_ABSTRACT_ELEMENT_T * alElement_p = \
private_pool_allocate((list_p)->free_pool); \
alElement_p->object_p = (obj_p); \
private_push_front(&(list_p)->elements, alElement_p); \
}
/**
* This method will add the objToAdd_p object to the list before the obj_p.
* NOTE: UNIMPLEMENTED
*/
#define sci_abstract_list_insert( \
list_p, \
obj_p, \
objToAdd_p \
) \
{ \
SCI_ABSTRACT_ELEMENT_LIST_T * elem_list = &(list_p)->elements; \
\
SCI_ABSTRACT_ELEMENT_T * obj_element = private_find(elem_list, obj_p); \
\
SCI_ABSTRACT_ELEMENT_T * objToAdd_element = \
private_pool_allocate((list_p)->free_pool); \
\
objToAdd_element->object_p = objToAdd_p; \
\
ASSERT(obj_element != NULL); \
ASSERT(objToAdd_element != NULL); \
\
if (obj_element == elem_list->front_p) \
{ \
objToAdd_element->object_p = (objToAdd_p); \
private_push_front(&(list_p)->elements, objToAdd_element); \
} \
else \
{ \
obj_element->previous_p->next_p = objToAdd_element; \
objToAdd_element->previous_p = obj_element->previous_p; \
\
obj_element->previous_p = objToAdd_element; \
objToAdd_element->next_p = obj_element; \
\
elem_list->size++; \
} \
}
/**
* This method simply frees all the items from the list.
*/
#define sci_abstract_list_clear( \
list_p \
) \
{ \
while ((list_p)->elements.size > 0) \
sci_abstract_list_popfront((list_p)); \
}
/**
* This method simply returns the object being pointed to by the list element
* (The item being listed).
*/
#define sci_abstract_list_get_object( \
alElement_p \
) \
({ \
void * obj_p = NULL; \
if ((alElement_p) != NULL) \
obj_p = (alElement_p)->object_p; \
\
obj_p; \
})
/**
* This method is simply a wrapper to provide the number of elements in
* the free list.
*/
#define sci_abstract_list_freeList_size(freeList) (sci_abstract_list_size(freeList))
//******************************************************************************
//*
//* P R I V A T E M E T H O D S
//*
//******************************************************************************
/**
* This method simply performs the common portion of pushing a list element
* onto a list.
*
* WARNING: This is a private helper method that should not be called directly
* by any users.
*/
#define private_push_front( \
privateList_p, \
alElement_p \
) \
{ \
if ((privateList_p)->front_p == NULL) \
{ \
(privateList_p)->front_p = (privateList_p)->back_p = (alElement_p); \
(alElement_p)->next_p = (alElement_p)->previous_p = NULL; \
} \
else \
{ \
(alElement_p)->next_p = (privateList_p)->front_p; \
(alElement_p)->previous_p = NULL; \
(privateList_p)->front_p->previous_p = (alElement_p); \
(privateList_p)->front_p = (alElement_p); \
} \
\
(privateList_p)->size++; \
}
/**
* This method simply performs the common portion of popping a list element
* from a list.
*
* WARNING: This is a private helper method that should not be called directly
* by any users.
*/
#define private_pop_front( \
privateList_p \
) \
({ \
SCI_ABSTRACT_ELEMENT_T * alElement_p = (privateList_p)->front_p; \
\
if (alElement_p != NULL) \
{ \
if ((privateList_p)->front_p == (privateList_p)->back_p) \
{ \
(privateList_p)->front_p = (privateList_p)->back_p = NULL; \
} \
else \
{ \
(privateList_p)->front_p = (privateList_p)->front_p->next_p; \
(privateList_p)->front_p->previous_p = NULL; \
} \
\
(privateList_p)->size--; \
} \
\
alElement_p; \
})
/**
* 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.
*/
#define private_find( \
list_p, \
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; \
} \
\
alElement_p; \
})
/**
* This private method will free the supplied list element back to the pool
* of free list elements.
*/
#define private_pool_free( \
free_pool, \
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.
*/
#define private_pool_allocate(free_pool) \
({ \
SCI_ABSTRACT_ELEMENT_T * alElement_p; \
\
alElement_p = private_pop_front(&(free_pool)->free_list); \
\
memset(alElement_p, 0, sizeof(SCI_ABSTRACT_ELEMENT_T)); \
alElement_p; \
})
#endif
#endif // _ABSTRACT_LIST_H_