doc: add order all types queue test in eventdev test guide

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

diff --git a/lib/librte_hash/rte_hash.h b/lib/librte_hash/rte_hash.h
index b678766..622c180 100644 (file)
--- a/lib/librte_hash/rte_hash.h
+++ b/lib/librte_hash/rte_hash.h
@@ -41,6 +41,7 @@
  */
 
 #include <stdint.h>
+#include <stddef.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -59,6 +60,9 @@ extern "C" {
 /** Enable Hardware transactional memory support. */
 #define RTE_HASH_EXTRA_FLAGS_TRANS_MEM_SUPPORT 0x01
 
+/** Default behavior of insertion, single writer/multi writer */
+#define RTE_HASH_EXTRA_FLAGS_MULTI_WRITER_ADD 0x02
+
 /** Signature of key that is stored internally. */
 typedef uint32_t hash_sig_t;
 
@@ -66,6 +70,9 @@ typedef uint32_t hash_sig_t;
 typedef uint32_t (*rte_hash_function)(const void *key, uint32_t key_len,
                                      uint32_t init_val);
 
+/** Type of function used to compare the hash key. */
+typedef int (*rte_hash_cmp_eq_t)(const void *key1, const void *key2, size_t key_len);
+
 /**
  * Parameters used when creating the hash table.
  */
@@ -103,6 +110,19 @@ struct rte_hash;
 struct rte_hash *
 rte_hash_create(const struct rte_hash_parameters *params);
 
+/**
+ * Set a new hash compare function other than the default one.
+ *
+ * @note Function pointer does not work with multi-process, so do not use it
+ * in multi-process mode.
+ *
+ * @param h
+ *   Hash table for which the function is to be changed
+ * @param func
+ *   New compare function
+ */
+void rte_hash_set_cmp_func(struct rte_hash *h, rte_hash_cmp_eq_t func);
+
 /**
  * Find an existing hash table object and return a pointer to it.
  *
@@ -251,6 +271,24 @@ 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.
@@ -345,8 +383,6 @@ rte_hash_lookup_with_hash(const struct rte_hash *h,
 hash_sig_t
 rte_hash_hash(const struct rte_hash *h, const void *key);
 
-#define rte_hash_lookup_multi rte_hash_lookup_bulk
-#define rte_hash_lookup_multi_data rte_hash_lookup_bulk_data
 /**
  * Find multiple keys in the hash table.
  * This operation is multi-thread safe.