vhost: avoid memory barriers when no descriptors dequeued

[dpdk.git] / lib / librte_hash / rte_cuckoo_hash.h

diff --git a/lib/librte_hash/rte_cuckoo_hash.h b/lib/librte_hash/rte_cuckoo_hash.h
index 8c522ac..5dfbbc4 100644 (file)
--- a/lib/librte_hash/rte_cuckoo_hash.h
+++ b/lib/librte_hash/rte_cuckoo_hash.h
@@ -1,5 +1,6 @@
 /* SPDX-License-Identifier: BSD-3-Clause
  * Copyright(c) 2016 Intel Corporation
+ * Copyright(c) 2018 Arm Limited
  */
 
 /* rte_cuckoo_hash.h
@@ -123,7 +124,7 @@ struct rte_hash_key {
        };
        /* Variable key size */
        char key[0];
-} __attribute__((aligned(KEY_ALIGNMENT)));
+};
 
 /* All different signature compare functions */
 enum rte_hash_sig_compare_function {
@@ -168,6 +169,14 @@ struct rte_hash {
        uint8_t readwrite_concur_support;
        /**< If read-write concurrency support is enabled */
        uint8_t ext_table_support;     /**< Enable extendable bucket table */
+       uint8_t no_free_on_del;
+       /**< If key index should be freed on calling rte_hash_del_xxx APIs.
+        * If this is set, rte_hash_free_key_with_position must be called to
+        * free the key index associated with the deleted entry.
+        * This flag is enabled by default.
+        */
+       uint8_t readwrite_concur_lf_support;
+       /**< If read-write concurrency lock free support is enabled */
        uint8_t writer_takes_lock;
        /**< Indicates if the writer threads need to take lock */
        rte_hash_function hash_func;    /**< Function used to calculate hash. */
@@ -190,6 +199,8 @@ struct rte_hash {
        rte_rwlock_t *readwrite_lock; /**< Read-write lock thread-safety. */
        struct rte_hash_bucket *buckets_ext; /**< Extra buckets array */
        struct rte_ring *free_ext_bkts; /**< Ring of indexes of free buckets */
+       uint32_t *tbl_chng_cnt;
+       /**< Indicates if the hash table changed from last read. */
 } __rte_cache_aligned;
 
 struct queue_node {