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Cc: Yu Nemo Wenbin <yuwb_bjy@ctbri.com.cn>
Subject: [dpdk-dev] [PATCH] hash: add rte_hash_set_cmp_func() function.
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Give user a chance to costomize the hash key compare function.
The default rte_hash_cmp_eq function is set in the rte_hash_create
function, but these builtin ones may not good enough, so the user
may call this to override the default one.
Signed-off-by: Yu Nemo Wenbin <yuwb_bjy@ctbri.com.cn>
---
lib/librte_hash/rte_cuckoo_hash.c | 7 +++++--
lib/librte_hash/rte_hash.h | 12 ++++++++++++
2 files changed, 17 insertions(+), 2 deletions(-)
diff --git a/lib/librte_hash/rte_cuckoo_hash.c b/lib/librte_hash/rte_cuckoo_hash.c
index 1e970de..71e2419 100644
--- a/lib/librte_hash/rte_cuckoo_hash.c
+++ b/lib/librte_hash/rte_cuckoo_hash.c
@@ -98,8 +98,6 @@ EAL_REGISTER_TAILQ(rte_hash_tailq)
#define LCORE_CACHE_SIZE 8
-typedef int (*rte_hash_cmp_eq_t)(const void *key1, const void *key2, size_t key_len);
-
struct lcore_cache {
unsigned len; /**< Cache len */
void *objs[LCORE_CACHE_SIZE]; /**< Cache objects */
@@ -183,6 +181,11 @@ rte_hash_find_existing(const char *name)
return h;
}
+void rte_hash_set_cmp_func(struct rte_hash *h, rte_hash_cmp_eq_t func)
+{
+ h->rte_hash_cmp_eq = func;
+}
+
struct rte_hash *
rte_hash_create(const struct rte_hash_parameters *params)
{
diff --git a/lib/librte_hash/rte_hash.h b/lib/librte_hash/rte_hash.h
index b678766..d626d1c 100644
--- a/lib/librte_hash/rte_hash.h
+++ b/lib/librte_hash/rte_hash.h
@@ -66,6 +66,9 @@ 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 key. It works like the memcmp() */
+typedef int (*rte_hash_cmp_eq_t)(const void *key1, const void *key2, size_t key_len);
+
/**
* Parameters used when creating the hash table.
*/
@@ -104,6 +107,15 @@ struct rte_hash *
rte_hash_create(const struct rte_hash_parameters *params);
/**
+ * Set the rte_hash_set_cmp_func.
+ * Set the new hash compare function if the default one is not suitable enough.
+ *
+ * @param h
+ * Hash table to reset
+ */
+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.
*
* @param name
--
1.9.1