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

Message ID 1407880077-15038-1-git-send-email-tomas.vestelind@gmail.com
State Changes Requested, archived
Headers show

Commit Message

Tomas Vestelind Aug. 12, 2014, 9:47 p.m. UTC
I added rte_hash_clear which clear the map from all previously added
keys.

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

Patch
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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