/* SPDX-License-Identifier: BSD-2-Clause */
/* Driver Manager List Interface Implementation.
*
* COPYRIGHT (c) 2009 Cobham Gaisler AB.
*
* 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.
*/
#include <stdlib.h>
#include <drvmgr/drvmgr_list.h>
/* LIST interface */
void drvmgr_list_init(struct drvmgr_list *list, int offset)
{
list->head = list->tail = NULL;
list->ofs = offset;
}
void drvmgr_list_empty(struct drvmgr_list *list)
{
list->head = list->tail = NULL;
}
void drvmgr_list_add_head(struct drvmgr_list *list, void *entry)
{
LIST_FIELD(list, entry) = list->head;
if (list->head == NULL)
list->tail = entry;
list->head = entry;
}
void drvmgr_list_add_tail(struct drvmgr_list *list, void *entry)
{
if (list->tail == NULL)
list->head = entry;
else
LIST_FIELD(list, list->tail) = entry;
LIST_FIELD(list, entry) = NULL;
list->tail = entry;
}
void drvmgr_list_remove_head(struct drvmgr_list *list)
{
list->head = LIST_FIELD(list, list->head);
if (list->head == NULL)
list->tail = NULL;
}
void drvmgr_list_remove(struct drvmgr_list *list, void *entry)
{
void **prevptr = &list->head;
void *curr, *prev;
prev = NULL;
curr = list->head;
while (curr != entry) {
prev = curr;
prevptr = &LIST_FIELD(list, curr);
curr = LIST_FIELD(list, curr);
}
*prevptr = LIST_FIELD(list, entry);
if (list->tail == entry)
list->tail = prev;
}
