1 files changed, 127 insertions, 0 deletions
diff --git a/drivers/staging/meilhaus/medlist.c b/drivers/staging/meilhaus/medlist.c
new file mode 100644
index 000000000000..ef4e36955dc8
--- /dev/null
+++ b/drivers/staging/meilhaus/medlist.c
@@ -0,0 +1,127 @@
+/**
+ * @file me_dlist.c
+ *
+ * @brief Implements the device list class.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ */
+
+/*
+ * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "meerror.h"
+#include "medefines.h"
+
+#include "medlist.h"
+#include "medebug.h"
+
+int me_dlist_query_number_devices(struct me_dlist *dlist, int *number)
+{
+	PDEBUG_LOCKS("called.\n");
+	*number = dlist->n;
+	return ME_ERRNO_SUCCESS;
+}
+
+unsigned int me_dlist_get_number_devices(struct me_dlist *dlist)
+{
+	PDEBUG_LOCKS("called.\n");
+	return dlist->n;
+}
+
+me_device_t *me_dlist_get_device(struct me_dlist * dlist, unsigned int index)
+{
+
+	struct list_head *pos;
+	me_device_t *device = NULL;
+	unsigned int i = 0;
+
+	PDEBUG_LOCKS("called.\n");
+
+	if (index >= dlist->n) {
+		PERROR("Index out of range.\n");
+		return NULL;
+	}
+
+	list_for_each(pos, &dlist->head) {
+		if (i == index) {
+			device = list_entry(pos, me_device_t, list);
+			break;
+		}
+
+		++i;
+	}
+
+	return device;
+}
+
+void me_dlist_add_device_tail(struct me_dlist *dlist, me_device_t * device)
+{
+	PDEBUG_LOCKS("called.\n");
+
+	list_add_tail(&device->list, &dlist->head);
+	++dlist->n;
+}
+
+me_device_t *me_dlist_del_device_tail(struct me_dlist *dlist)
+{
+
+	struct list_head *last;
+	me_device_t *device;
+
+	PDEBUG_LOCKS("called.\n");
+
+	if (list_empty(&dlist->head))
+		return NULL;
+
+	last = dlist->head.prev;
+
+	device = list_entry(last, me_device_t, list);
+
+	list_del(last);
+
+	--dlist->n;
+
+	return device;
+}
+
+int me_dlist_init(me_dlist_t * dlist)
+{
+	PDEBUG_LOCKS("called.\n");
+
+	INIT_LIST_HEAD(&dlist->head);
+	dlist->n = 0;
+	return 0;
+}
+
+void me_dlist_deinit(me_dlist_t * dlist)
+{
+
+	struct list_head *s;
+	me_device_t *device;
+
+	PDEBUG_LOCKS("called.\n");
+
+	while (!list_empty(&dlist->head)) {
+		s = dlist->head.next;
+		list_del(s);
+		device = list_entry(s, me_device_t, list);
+		device->me_device_destructor(device);
+	}
+
+	dlist->n = 0;
+}