451084d2e0
Cc: David Kiliani <mail@davidkiliani.de> Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
174 lines
3.5 KiB
C
174 lines
3.5 KiB
C
/**
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* @file me_slist.c
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*
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* @brief Implements the subdevice list class.
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* @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
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* @author Guenter Gebhardt
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*/
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/*
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* Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
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*
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* This file is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU 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., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "meerror.h"
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#include "medefines.h"
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#include "meslist.h"
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#include "medebug.h"
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int me_slist_query_number_subdevices(struct me_slist *slist, int *number)
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{
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PDEBUG_LOCKS("called.\n");
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*number = slist->n;
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return ME_ERRNO_SUCCESS;
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}
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unsigned int me_slist_get_number_subdevices(struct me_slist *slist)
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{
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PDEBUG_LOCKS("called.\n");
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return slist->n;
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}
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me_subdevice_t *me_slist_get_subdevice(struct me_slist * slist,
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unsigned int index)
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{
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struct list_head *pos;
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me_subdevice_t *subdevice = NULL;
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unsigned int i = 0;
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PDEBUG_LOCKS("called.\n");
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if (index >= slist->n) {
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PERROR("Index out of range.\n");
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return NULL;
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}
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list_for_each(pos, &slist->head) {
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if (i == index) {
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subdevice = list_entry(pos, me_subdevice_t, list);
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break;
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}
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++i;
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}
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return subdevice;
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}
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int me_slist_get_subdevice_by_type(struct me_slist *slist,
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unsigned int start_subdevice,
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int type, int subtype, int *subdevice)
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{
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me_subdevice_t *pos;
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int s_type, s_subtype;
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unsigned int index = 0;
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PDEBUG_LOCKS("called.\n");
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if (start_subdevice >= slist->n) {
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PERROR("Start index out of range.\n");
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return ME_ERRNO_NOMORE_SUBDEVICE_TYPE;
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}
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list_for_each_entry(pos, &slist->head, list) {
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if (index < start_subdevice) { // Go forward to start subdevice.
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++index;
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continue;
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}
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pos->me_subdevice_query_subdevice_type(pos,
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&s_type, &s_subtype);
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if (subtype == ME_SUBTYPE_ANY) {
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if (s_type == type)
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break;
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} else {
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if ((s_type == type) && (s_subtype == subtype))
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break;
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}
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++index;
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}
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if (index >= slist->n) {
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return ME_ERRNO_NOMORE_SUBDEVICE_TYPE;
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}
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*subdevice = index;
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return ME_ERRNO_SUCCESS;
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}
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void me_slist_add_subdevice_tail(struct me_slist *slist,
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me_subdevice_t *subdevice)
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{
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PDEBUG_LOCKS("called.\n");
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list_add_tail(&subdevice->list, &slist->head);
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++slist->n;
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}
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me_subdevice_t *me_slist_del_subdevice_tail(struct me_slist *slist)
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{
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struct list_head *last;
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me_subdevice_t *subdevice;
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PDEBUG_LOCKS("called.\n");
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if (list_empty(&slist->head))
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return NULL;
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last = slist->head.prev;
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subdevice = list_entry(last, me_subdevice_t, list);
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list_del(last);
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--slist->n;
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return subdevice;
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}
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int me_slist_init(me_slist_t *slist)
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{
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PDEBUG_LOCKS("called.\n");
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INIT_LIST_HEAD(&slist->head);
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slist->n = 0;
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return 0;
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}
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void me_slist_deinit(me_slist_t *slist)
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{
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struct list_head *s;
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me_subdevice_t *subdevice;
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PDEBUG_LOCKS("called.\n");
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while (!list_empty(&slist->head)) {
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s = slist->head.next;
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list_del(s);
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subdevice = list_entry(s, me_subdevice_t, list);
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subdevice->me_subdevice_destructor(subdevice);
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}
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slist->n = 0;
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}
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