Re: [dpdk-users] rte_hash_hash in DPDK2.0

["De Lara Guarch, Pablo" <pablo.de.lara.guarch@intel.com>]

Hi Nir,


> -----Original Message-----
> From: users [mailto:users-bounces@dpdk.org] On Behalf Of Bar, Nir
> Sent: Wednesday, February 08, 2017 10:55 AM
> To: users@dpdk.org
> Subject: [dpdk-users] rte_hash_hash in DPDK2.0
> 
> Hi,
> 
> Why rte_has_hash() in DPDK-2.0 isn't multi thread safe?
> 
> It only calculates hash.
> 

Rte_hash_hash is multi-thread safe, but not multi-process safe, as it uses a function pointer to get the actual hash function.

Thanks,
Pablo
> Thanks,
> Nir
> 
> 
> **
> * Calc a hash value by key. This operation is not multi-process safe.
> *
> * @param h
> *   Hash table to look in.
> * @param key
> *   Key to find.
> * @return
> *   - hash value
> */
> static inline hash_sig_t
> rte_hash_hash(const struct rte_hash *h, const void *key)
> {
>                /* calc hash result by key */
>                return h->hash_func(key, h->key_len, h->hash_func_init_val);
> }
> 
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