From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id AA7DBA00E6 for ; Fri, 12 Jul 2019 17:55:01 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 2E1A11BE16; Fri, 12 Jul 2019 17:55:01 +0200 (CEST) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by dpdk.org (Postfix) with ESMTP id 059E51BE00; Fri, 12 Jul 2019 17:54:56 +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 1C7FC344; Fri, 12 Jul 2019 08:54:56 -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 C78A73F246; Fri, 12 Jul 2019 08:54:53 -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 23:54:36 +0800 Message-Id: <1562946877-50963-2-git-send-email-gavin.hu@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1562946877-50963-1-git-send-email-gavin.hu@arm.com> References: <1562946877-50963-1-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 v9 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.c | 7 +++++++ lib/librte_ring/rte_ring.h | 17 +++++++++++++++++ lib/librte_ring/rte_ring_version.map | 7 +++++++ 3 files changed, 31 insertions(+) diff --git a/lib/librte_ring/rte_ring.c b/lib/librte_ring/rte_ring.c index b30b2aa..d9b3080 100644 --- a/lib/librte_ring/rte_ring.c +++ b/lib/librte_ring/rte_ring.c @@ -63,6 +63,13 @@ rte_ring_get_memsize(unsigned count) return sz; } +void +rte_ring_reset(struct rte_ring *r) +{ + r->prod.head = r->cons.head = 0; + r->prod.tail = r->cons.tail = 0; +} + int rte_ring_init(struct rte_ring *r, const char *name, unsigned count, unsigned flags) diff --git a/lib/librte_ring/rte_ring.h b/lib/librte_ring/rte_ring.h index e5a175c..2a9f768 100644 --- a/lib/librte_ring/rte_ring.h +++ b/lib/librte_ring/rte_ring.h @@ -669,6 +669,23 @@ 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 +void +rte_ring_reset(struct rte_ring *r); + +/** * 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