idr: idr_for_each_entry() macro

Inspired by the list_for_each_entry() macro
git-mirror · Aug 29, 2011 · 9749f30 · 9749f30
1 parent 6618bf1
commit 9749f30
Showing 1 changed file with 11 additions and 0 deletions.
diff --git a/include/linux/idr.h b/include/linux/idr.h
@@ -152,4 +152,15 @@ void ida_simple_remove(struct ida *ida, unsigned int id);
 
 void __init idr_init_cache(void);
 
+/**
+ * idr_for_each_entry - iterate over an idr's elements of a given type
+ * @idp:     idr handle
+ * @entry:   the type * to use as cursor
+ * @id:      id entry's key
+ */
+#define idr_for_each_entry(idp, entry, id)				\
+	for (id = 0, entry = (typeof(entry))idr_get_next((idp), &(id)); \
+	     entry != NULL;                                             \
+	     ++id, entry = (typeof(entry))idr_get_next((idp), &(id)))
+
 #endif /* __IDR_H__ */