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

[Bruce Richardson]

On Tue, Aug 12, 2014 at 11:47:57PM +0200, Tomas Vestelind wrote:
> I added rte_hash_clear which clear the map from all previously added
> keys.
> 
This patch is now quite old and needs an update to add the new API to the
rte_hash_version.map. A unit test for the new function would also be good to
have. Otherwise patch content looks ok. Is an updated V2 planned?

Regards,
/Bruce

> 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
>