This is useful in a situation where one knows that an hmap_node is in some
hmap, but it's not certain which one, and one needs to know whether it is
in a particular one. This is not a very common case; I don't see any
potential users in the current tree, although an upcoming commit will add
one.
Signed-off-by: Ben Pfaff <b...@nicira.com>
---
lib/hmap.c | 17 ++++++++++++++++-
lib/hmap.h | 4 +++-
2 files changed, 19 insertions(+), 2 deletions(-)
diff --git a/lib/hmap.c b/lib/hmap.c
index 9f27744..5862b62 100644
--- a/lib/hmap.c
+++ b/lib/hmap.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2008, 2009, 2010 Nicira Networks.
+ * Copyright (c) 2008, 2009, 2010, 2012 Nicira Networks.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -261,3 +261,18 @@ hmap_at_position(const struct hmap *hmap,
*offsetp = 0;
return NULL;
}
+
+/* Returns true if 'node' is in 'hmap', false otherwise. */
+bool
+hmap_contains(const struct hmap *hmap, const struct hmap_node *node)
+{
+ struct hmap_node *p;
+
+ for (p = hmap_first_in_bucket(hmap, node->hash); p; p = p->next) {
+ if (p == node) {
+ return true;
+ }
+ }
+
+ return false;
+}
diff --git a/lib/hmap.h b/lib/hmap.h
index ed2d78d..246fba2 100644
--- a/lib/hmap.h
+++ b/lib/hmap.h
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2008, 2009, 2010 Nicira Networks.
+ * Copyright (c) 2008, 2009, 2010, 2012 Nicira Networks.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -130,6 +130,8 @@ static inline struct hmap_node *hmap_first_in_bucket(const
struct hmap *,
size_t hash);
static inline struct hmap_node *hmap_next_in_bucket(const struct hmap_node *);
+bool hmap_contains(const struct hmap *, const struct hmap_node *);
+
/* Iteration. */
/* Iterates through every node in HMAP. */
--
1.7.2.5
_______________________________________________
dev mailing list
dev@openvswitch.org
http://openvswitch.org/mailman/listinfo/dev
