From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by dpdk.space (Postfix) with ESMTP id 300B3A0096 for ; Fri, 15 Mar 2019 04:33:25 +0100 (CET) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id C7BDA4CA6; Fri, 15 Mar 2019 04:33:24 +0100 (CET) Received: from foss.arm.com (foss.arm.com [217.140.101.70]) by dpdk.org (Postfix) with ESMTP id E0A954C95; Fri, 15 Mar 2019 04:33:21 +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 3FB0315AB; Thu, 14 Mar 2019 20:33:21 -0700 (PDT) Received: from net-arm-thunderx2.shanghai.arm.com (net-arm-thunderx2.shanghai.arm.com [10.169.40.121]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 6BA1D3F71D; Thu, 14 Mar 2019 20:33:19 -0700 (PDT) From: Gavin Hu To: dev@dpdk.org Cc: nd@arm.com, thomas@monjalon.net, jerinj@marvell.com, hemant.agrawal@nxp.com, nipun.gupta@nxp.com, Honnappa.Nagarahalli@arm.com, gavin.hu@arm.com, i.maximets@samsung.com, olivier.matz@6wind.com, stable@dpdk.org Date: Fri, 15 Mar 2019 11:31:25 +0800 Message-Id: <1552620686-10347-2-git-send-email-gavin.hu@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1552620686-10347-1-git-send-email-gavin.hu@arm.com> References: <1552620686-10347-1-git-send-email-gavin.hu@arm.com> In-Reply-To: <20181212062404.30243-1-gavin.hu@arm.com> References: <20181212062404.30243-1-gavin.hu@arm.com> Subject: [dpdk-stable] [PATCH v7 1/2] ring: add reset API to flush the ring when not in use X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches for DPDK stable branches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: stable-bounces@dpdk.org Sender: "stable" 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. Fixes: af75078fece3 ("first public release") Cc: stable@dpdk.org 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