#define KEY_FUNC_POINTER_UWORD (1) /*< sum = *(uword *) key */
#define KEY_FUNC_POINTER_U32 (2) /*< sum = *(u32 *) key */
#define KEY_FUNC_STRING (3) /*< sum = string_key_sum, etc. */
+#define KEY_FUNC_MEM (4) /*< sum = mem_key_sum */
/* key comparison function */
hash_key_equal_function_t *key_equal;
hash_unset_mem_free (uword ** h, void *key)
{
hash_pair_t *hp = hash_get_pair_mem (*h, key);
- ASSERT (hp);
- key = uword_to_pointer (hp->key, void *);
- hash_unset_mem (*h, key);
- clib_mem_free (key);
+ if (PREDICT_TRUE (hp != NULL))
+ {
+ key = uword_to_pointer (hp->key, void *);
+ hash_unset_mem (*h, key);
+ clib_mem_free (key);
+ }
}
/* internal routine to free a hash table */
extern uword string_key_equal (hash_t * h, uword key1, uword key2);
extern u8 *string_key_format_pair (u8 * s, va_list * args);
+/*
+ * Note: if you plan to put a hash into shared memory,
+ * the key sum and key equal functions MUST be set to magic constants!
+ * PIC means that whichever process sets up the hash won't have
+ * the actual key sum functions at the same place, leading to
+ * very hard-to-find bugs...
+ */
+
+#define hash_create_shmem(elts,key_bytes,value_bytes) \
+ hash_create2((elts),(key_bytes),(value_bytes), \
+ (hash_key_sum_function_t *) KEY_FUNC_MEM, \
+ (hash_key_equal_function_t *)KEY_FUNC_MEM, \
+ 0, 0)
+
#define hash_create_string(elts,value_bytes) \
hash_create2((elts),0,(value_bytes), \
(hash_key_sum_function_t *) KEY_FUNC_STRING, \