forked from Imagelibrary/rtems
86 lines
2.6 KiB
C
86 lines
2.6 KiB
C
/* 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;
|
|
}
|