[dpdk-dev] [PATCH] hash: added rte_hash_clear that clears all keys

[Tomas Vestelind]

I added rte_hash_clear which clear the map from all previously added
keys.

Signed-off-by: Tomas Vestelind <tomas.vestelind at gmail.com>
---
 lib/librte_hash/rte_hash.c |   14 ++++++++++++++
 lib/librte_hash/rte_hash.h |   10 ++++++++++
 2 files changed, 24 insertions(+)

diff --git a/lib/librte_hash/rte_hash.c b/lib/librte_hash/rte_hash.c
index 2108c4f..917a6c1 100644
--- a/lib/librte_hash/rte_hash.c
+++ b/lib/librte_hash/rte_hash.c
@@ -507,3 +507,17 @@ rte_hash_keys(const struct rte_hash *h, void *keys)

     return found_keys;
 }
+
+void
+rte_hash_clear(const struct rte_hash *h)
+{
+    unsigned int bucket, entry;
+
+    /* Clear all entries by invalidating each signature */
+    for (bucket = 0; bucket < h->num_buckets; bucket++) {
+        hash_sig_t *sig = get_sig_tbl_bucket(h, bucket);
+        for (entry = 0; entry < h->bucket_entries; entry++) {
+            sig[entry] = NULL_SIGNATURE;
+        }
+    }
+}
diff --git a/lib/librte_hash/rte_hash.h b/lib/librte_hash/rte_hash.h
index e0fb28f..b84137e 100644
--- a/lib/librte_hash/rte_hash.h
+++ b/lib/librte_hash/rte_hash.h
@@ -318,6 +318,16 @@ rte_hash_lookup_bulk(const struct rte_hash *h, const void 
**keys,
  */
 unsigned int
 rte_hash_keys(const struct rte_hash *h, void *keys);
+
+/**
+ * Clear all keys. This operation is not multi-thread safe and should only be
+ * called from one thread.
+ *
+ * @param h
+ *   Hash table to clear.
+ */
+void
+rte_hash_clear(const struct rte_hash *h);
 #ifdef __cplusplus
 }
 #endif
-- 
1.7.10.4