/*
- * Copyright (c) 2008, 2009, 2010 Nicira Networks.
+ * Copyright (c) 2008, 2009, 2010, 2012 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
}
#define HMAP_NODE_NULL ((struct hmap_node *) 1)
+#define HMAP_NODE_NULL_INITIALIZER { 0, HMAP_NODE_NULL }
/* Returns true if 'node' has been set to null by hmap_node_nullify() and has
* not been un-nullified by being inserted into an hmap. */
};
/* Initializer for an empty hash map. */
-#define HMAP_INITIALIZER(HMAP) { &(HMAP)->one, NULL, 0, 0 }
+#define HMAP_INITIALIZER(HMAP) \
+ { (struct hmap_node **const) &(HMAP)->one, NULL, 0, 0 }
/* Initialization. */
void hmap_init(struct hmap *);
void hmap_node_moved(struct hmap *, struct hmap_node *, struct hmap_node *);
static inline void hmap_replace(struct hmap *, const struct hmap_node *old,
- struct hmap_node *new);
+ struct hmap_node *new_node);
struct hmap_node *hmap_random_node(const struct hmap *);
* HASH is only evaluated once.
*/
#define HMAP_FOR_EACH_WITH_HASH(NODE, MEMBER, HASH, HMAP) \
- for ((NODE) = OBJECT_CONTAINING(hmap_first_with_hash(HMAP, HASH), \
- NODE, MEMBER); \
+ for (ASSIGN_CONTAINER(NODE, hmap_first_with_hash(HMAP, HASH), MEMBER); \
&(NODE)->MEMBER != NULL; \
- (NODE) = OBJECT_CONTAINING(hmap_next_with_hash(&(NODE)->MEMBER), \
- NODE, MEMBER))
+ ASSIGN_CONTAINER(NODE, hmap_next_with_hash(&(NODE)->MEMBER), \
+ MEMBER))
#define HMAP_FOR_EACH_IN_BUCKET(NODE, MEMBER, HASH, HMAP) \
- for ((NODE) = OBJECT_CONTAINING(hmap_first_in_bucket(HMAP, HASH), \
- NODE, MEMBER); \
+ for (ASSIGN_CONTAINER(NODE, hmap_first_in_bucket(HMAP, HASH), MEMBER); \
&(NODE)->MEMBER != NULL; \
- (NODE) = OBJECT_CONTAINING(hmap_next_in_bucket(&(NODE)->MEMBER), \
- NODE, MEMBER))
+ ASSIGN_CONTAINER(NODE, hmap_next_in_bucket(&(NODE)->MEMBER), MEMBER))
static inline struct hmap_node *hmap_first_with_hash(const struct hmap *,
size_t hash);
size_t hash);
static inline struct hmap_node *hmap_next_in_bucket(const struct hmap_node *);
-/* Iteration.
- *
- * The _SAFE version is needed when NODE may be freed. It is not needed when
- * NODE may be removed from the hash map but its members remain accessible and
- * intact. */
+bool hmap_contains(const struct hmap *, const struct hmap_node *);
+
+/* Iteration. */
+
+/* Iterates through every node in HMAP. */
#define HMAP_FOR_EACH(NODE, MEMBER, HMAP) \
- for ((NODE) = OBJECT_CONTAINING(hmap_first(HMAP), NODE, MEMBER); \
+ for (ASSIGN_CONTAINER(NODE, hmap_first(HMAP), MEMBER); \
&(NODE)->MEMBER != NULL; \
- (NODE) = OBJECT_CONTAINING(hmap_next(HMAP, &(NODE)->MEMBER), \
- NODE, MEMBER))
+ ASSIGN_CONTAINER(NODE, hmap_next(HMAP, &(NODE)->MEMBER), MEMBER))
+/* Safe when NODE may be freed (not needed when NODE may be removed from the
+ * hash map but its members remain accessible and intact). */
#define HMAP_FOR_EACH_SAFE(NODE, NEXT, MEMBER, HMAP) \
- for ((NODE) = OBJECT_CONTAINING(hmap_first(HMAP), NODE, MEMBER); \
+ for (ASSIGN_CONTAINER(NODE, hmap_first(HMAP), MEMBER); \
(&(NODE)->MEMBER != NULL \
- ? (NEXT) = OBJECT_CONTAINING(hmap_next(HMAP, &(NODE)->MEMBER), \
- NODE, MEMBER), 1 \
+ ? ASSIGN_CONTAINER(NEXT, hmap_next(HMAP, &(NODE)->MEMBER), MEMBER) \
: 0); \
(NODE) = (NEXT))
+/* Continues an iteration from just after NODE. */
+#define HMAP_FOR_EACH_CONTINUE(NODE, MEMBER, HMAP) \
+ for (ASSIGN_CONTAINER(NODE, hmap_next(HMAP, &(NODE)->MEMBER), MEMBER); \
+ &(NODE)->MEMBER != NULL; \
+ ASSIGN_CONTAINER(NODE, hmap_next(HMAP, &(NODE)->MEMBER), MEMBER))
+
static inline struct hmap_node *hmap_first(const struct hmap *);
static inline struct hmap_node *hmap_next(const struct hmap *,
const struct hmap_node *);
+struct hmap_node *hmap_at_position(const struct hmap *,
+ uint32_t *bucket, uint32_t *offset);
+
/* Returns the number of nodes currently in 'hmap'. */
static inline size_t
hmap_count(const struct hmap *hmap)
while (node != NULL && node->hash != hash) {
node = node->next;
}
- return (struct hmap_node *) node;
+ return CONST_CAST(struct hmap_node *, node);
}
/* Returns the first node in 'hmap' with the given 'hash', or a null pointer if