X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=lib%2Flibrte_hash%2Frte_hash.h;h=1f1a276df7b92a595a680fc8d7362f09ef3bc314;hb=b769101307daa85213152db947281dfd693e52a2;hp=c9612fbd01123205da77ba5d1db0993bb4f9b4a3;hpb=be856325cba3e3b95f5c0a887c10e6b4d0f5d6c2;p=dpdk.git

diff --git a/lib/librte_hash/rte_hash.h b/lib/librte_hash/rte_hash.h
index c9612fbd01..1f1a276df7 100644
--- a/lib/librte_hash/rte_hash.h
+++ b/lib/librte_hash/rte_hash.h
@@ -1,34 +1,5 @@
-/*-
- *   BSD LICENSE
- *
- *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
- *   All rights reserved.
- *
- *   Redistribution and use in source and binary forms, with or without
- *   modification, are permitted provided that the following conditions
- *   are met:
- *
- *     * Redistributions of source code must retain the above copyright
- *       notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above copyright
- *       notice, this list of conditions and the following disclaimer in
- *       the documentation and/or other materials provided with the
- *       distribution.
- *     * Neither the name of Intel Corporation nor the names of its
- *       contributors may be used to endorse or promote products derived
- *       from this software without specific prior written permission.
- *
- *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2015 Intel Corporation
  */
 
 #ifndef _RTE_HASH_H_
@@ -63,6 +34,9 @@ extern "C" {
 /** Default behavior of insertion, single writer/multi writer */
 #define RTE_HASH_EXTRA_FLAGS_MULTI_WRITER_ADD 0x02
 
+/** Flag to support reader writer concurrency */
+#define RTE_HASH_EXTRA_FLAGS_RW_CONCURRENCY 0x04
+
 /** Signature of key that is stored internally. */
 typedef uint32_t hash_sig_t;
 
@@ -152,6 +126,17 @@ rte_hash_free(struct rte_hash *h);
 void
 rte_hash_reset(struct rte_hash *h);
 
+/**
+ * Return the number of keys in the hash table
+ * @param h
+ *  Hash table to query from
+ * @return
+ *   - -EINVAL if parameters are invalid
+ *   - A value indicating how many keys were inserted in the table.
+ */
+int32_t
+rte_hash_count(const struct rte_hash *h);
+
 /**
  * Add a key-value pair to an existing hash table.
  * This operation is not multi-thread safe
@@ -271,6 +256,24 @@ rte_hash_del_key(const struct rte_hash *h, const void *key);
 int32_t
 rte_hash_del_key_with_hash(const struct rte_hash *h, const void *key, hash_sig_t sig);
 
+/**
+ * Find a key in the hash table given the position.
+ * This operation is multi-thread safe.
+ *
+ * @param h
+ *   Hash table to get the key from.
+ * @param position
+ *   Position returned when the key was inserted.
+ * @param key
+ *   Output containing a pointer to the key
+ * @return
+ *   - 0 if retrieved successfully
+ *   - EINVAL if the parameters are invalid.
+ *   - ENOENT if no valid key is found in the given position.
+ */
+int
+rte_hash_get_key_with_position(const struct rte_hash *h, const int32_t position,
+			       void **key);
 
 /**
  * Find a key-value pair in the hash table.
@@ -339,7 +342,7 @@ rte_hash_lookup(const struct rte_hash *h, const void *key);
  * @param key
  *   Key to find.
  * @param sig
- *   Hash value to remove from the hash table.
+ *   Precomputed hash value for 'key'.
  * @return
  *   - -EINVAL if the parameters are invalid.
  *   - -ENOENT if the key is not found.