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>
128 lines
2.6 KiB
C
128 lines
2.6 KiB
C
/**
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* @file me_dlist.c
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*
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* @brief Implements the device 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 "medlist.h"
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#include "medebug.h"
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int me_dlist_query_number_devices(struct me_dlist *dlist, int *number)
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{
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PDEBUG_LOCKS("called.\n");
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*number = dlist->n;
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return ME_ERRNO_SUCCESS;
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}
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unsigned int me_dlist_get_number_devices(struct me_dlist *dlist)
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{
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PDEBUG_LOCKS("called.\n");
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return dlist->n;
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}
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me_device_t *me_dlist_get_device(struct me_dlist * dlist, unsigned int index)
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{
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struct list_head *pos;
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me_device_t *device = NULL;
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unsigned int i = 0;
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PDEBUG_LOCKS("called.\n");
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if (index >= dlist->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, &dlist->head) {
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if (i == index) {
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device = list_entry(pos, me_device_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 device;
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}
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void me_dlist_add_device_tail(struct me_dlist *dlist, me_device_t *device)
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{
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PDEBUG_LOCKS("called.\n");
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list_add_tail(&device->list, &dlist->head);
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++dlist->n;
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}
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me_device_t *me_dlist_del_device_tail(struct me_dlist *dlist)
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{
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struct list_head *last;
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me_device_t *device;
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PDEBUG_LOCKS("called.\n");
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if (list_empty(&dlist->head))
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return NULL;
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last = dlist->head.prev;
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device = list_entry(last, me_device_t, list);
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list_del(last);
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--dlist->n;
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return device;
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}
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int me_dlist_init(me_dlist_t *dlist)
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{
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PDEBUG_LOCKS("called.\n");
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INIT_LIST_HEAD(&dlist->head);
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dlist->n = 0;
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return 0;
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}
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void me_dlist_deinit(me_dlist_t *dlist)
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{
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struct list_head *s;
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me_device_t *device;
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PDEBUG_LOCKS("called.\n");
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while (!list_empty(&dlist->head)) {
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s = dlist->head.next;
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list_del(s);
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device = list_entry(s, me_device_t, list);
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device->me_device_destructor(device);
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}
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dlist->n = 0;
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}
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