1 files changed, 99 insertions, 0 deletions
diff --git a/include/xlnx-list.h b/include/xlnx-list.h
new file mode 100644
index 0000000..f23ab24
--- /dev/null
+++ b/include/xlnx-list.h
@@ -0,0 +1,99 @@
+/*
+ * Xilinx Video Library - Double linked lists
+ *
+ * Copyright (C) 2014-2016 Ideas on board Oy
+ *
+ * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * This library is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or (at
+ * your option) any later version.
+ *
+ * This library 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.
+ */
+
+#ifndef __XLNX_LIST_H__
+#define __XLNX_LIST_H__
+
+#include <stddef.h>
+
+struct list_entry {
+	struct list_entry *prev;
+	struct list_entry *next;
+};
+
+static inline void list_init(struct list_entry *list)
+{
+	list->next = list;
+	list->prev = list;
+}
+
+static inline int list_empty(struct list_entry *list)
+{
+	return list->next == list;
+}
+
+static inline void list_append(struct list_entry *entry, struct list_entry *list)
+{
+	entry->next = list;
+	entry->prev = list->prev;
+	list->prev->next = entry;
+	list->prev = entry;
+}
+
+static inline void list_prepend(struct list_entry *entry, struct list_entry *list)
+{
+	entry->next = list->next;
+	entry->prev = list;
+	list->next->prev = entry;
+	list->next = entry;
+}
+
+static inline void list_insert_after(struct list_entry *entry, struct list_entry *after)
+{
+	list_prepend(entry, after);
+}
+
+static inline void list_insert_before(struct list_entry *entry, struct list_entry *before)
+{
+	list_append(entry, before);
+}
+
+static inline void list_remove(struct list_entry *entry)
+{
+	entry->prev->next = entry->next;
+	entry->next->prev = entry->prev;
+}
+
+#define list_entry(entry, type, member) \
+	(type *)((char *)(entry) - offsetof(type, member))
+
+#define list_first_entry(list, type, member) \
+	list_entry((list)->next, type, member)
+
+#define list_last_entry(list, type, member) \
+	list_entry((list)->prev, type, member)
+
+#define list_for_each(entry, list) \
+	for (entry = (list)->next; entry != (list); entry = entry->next)
+
+#define list_for_each_entry(entry, list, member) \
+	for (entry = list_entry((list)->next, typeof(*entry), member); \
+	     &entry->member != (list); \
+	     entry = list_entry(entry->member.next, typeof(*entry), member))
+
+#define list_for_each_safe(entry, __next, list) \
+	for (entry = (list)->next, __next = entry->next; entry != (list); \
+	     entry = __next, __next = entry->next)
+
+#define list_for_each_entry_safe(entry, __next, list, member) \
+	for (entry = list_entry((list)->next, typeof(*entry), member), \
+	     __next = list_entry(entry->member.next, typeof(*entry), member); \
+	     &entry->member != (list); \
+	     entry = __next, __next = list_entry(entry->member.next, typeof(*entry), member))
+
+#endif /* __XLNX_LIST_H__ */