From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2C4F5C742B0 for ; Fri, 12 Jul 2019 09:27:29 +0000 (UTC) Received: from dpdk.org (dpdk.org [92.243.14.124]) by mail.kernel.org (Postfix) with ESMTP id E4ABE20838 for ; Fri, 12 Jul 2019 09:27:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E4ABE20838 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=dev-bounces@dpdk.org Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 348F31B9C7; Fri, 12 Jul 2019 11:27:28 +0200 (CEST) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by dpdk.org (Postfix) with ESMTP id 298FD1B9C6; Fri, 12 Jul 2019 11:27:27 +0200 (CEST) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 7E72A344; Fri, 12 Jul 2019 02:27:26 -0700 (PDT) Received: from net-arm-thunderx2.shanghai.arm.com (net-arm-thunderx2.shanghai.arm.com [10.169.40.40]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 3B5833F71F; Fri, 12 Jul 2019 02:27:24 -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, 12 Jul 2019 17:26:42 +0800 Message-Id: <1562923603-27755-2-git-send-email-gavin.hu@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1562923603-27755-1-git-send-email-gavin.hu@arm.com> References: <1562923603-27755-1-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-dev] [PATCH v8 1/2] 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: , Errors-To: dev-bounces@dpdk.org Sender: "dev" 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 | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/lib/librte_ring/rte_ring.h b/lib/librte_ring/rte_ring.h index e5a175c..0213b08 100644 --- a/lib/librte_ring/rte_ring.h +++ b/lib/librte_ring/rte_ring.h @@ -669,6 +669,27 @@ 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. + */ +__rte_experimental +static inline void +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 -- 2.7.4