From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from foss.arm.com (foss.arm.com [217.140.101.70]) by dpdk.org (Postfix) with ESMTP id 6AE111B460 for ; Wed, 9 Jan 2019 12:32:03 +0100 (CET) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id DA26FA78; Wed, 9 Jan 2019 03:32:02 -0800 (PST) Received: from net-arm-c2400.shanghai.arm.com (net-arm-c2400.shanghai.arm.com [10.169.41.165]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 6D3B33F70D; Wed, 9 Jan 2019 03:32:01 -0800 (PST) From: gavin hu To: dev@dpdk.org Cc: nd@arm.com, thomas@monjalon.net, jerinj@marvell.com, hemant.agrawal@nxp.com, Honnappa.Nagarahalli@arm.com, gavin.hu@arm.com, olivier.matz@6wind.com, bruce.richardson@intel.com Date: Wed, 9 Jan 2019 19:31:41 +0800 Message-Id: <1547033502-3167-3-git-send-email-gavin.hu@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1547033502-3167-1-git-send-email-gavin.hu@arm.com> References: <1547033502-3167-1-git-send-email-gavin.hu@arm.com> In-Reply-To: <1546483094-29712-2-git-send-email-gavin.hu@arm.com> References: <1546483094-29712-2-git-send-email-gavin.hu@arm.com> Subject: [dpdk-dev] [PATCH v6 2/3] ring: add reset API to flush the ring when not in use X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 09 Jan 2019 11:32:03 -0000 From: Gavin Hu Currently, the flush is done by dequeuing the ring in a while loop. It is much simpler to flush the queue by resetting the head and tail indices. Signed-off-by: Gavin Hu Reviewed-by: Ruifeng Wang Reviewed-by: Honnappa Nagarahalli --- lib/librte_ring/rte_ring.h | 20 ++++++++++++++++++++ lib/librte_ring/rte_ring_version.map | 7 +++++++ 2 files changed, 27 insertions(+) diff --git a/lib/librte_ring/rte_ring.h b/lib/librte_ring/rte_ring.h index af5444a..2830300 100644 --- a/lib/librte_ring/rte_ring.h +++ b/lib/librte_ring/rte_ring.h @@ -671,6 +671,26 @@ rte_ring_dequeue(struct rte_ring *r, void **obj_p) } /** + * Flush a ring. + * + * This function flush all the elements in a ring + * + * @b EXPERIMENTAL: this API may change without prior notice + * + * @warning + * Make sure the ring is not in use while calling this function. + * + * @param r + * A pointer to the ring structure. + */ +static inline void __rte_experimental +rte_ring_reset(struct rte_ring *r) +{ + r->prod.head = r->cons.head = 0; + r->prod.tail = r->cons.tail = 0; +} + +/** * Return the number of entries in a ring. * * @param r diff --git a/lib/librte_ring/rte_ring_version.map b/lib/librte_ring/rte_ring_version.map index d935efd..581d9ca 100644 --- a/lib/librte_ring/rte_ring_version.map +++ b/lib/librte_ring/rte_ring_version.map @@ -17,3 +17,10 @@ DPDK_2.2 { rte_ring_free; } DPDK_2.0; + +EXPERIMENTAL { + global: + + rte_ring_reset; + +}; -- 2.7.4