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From: Gavin Hu <gavin.hu@arm.com>
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, olivier.matz@6wind.com
Date: Wed, 17 Jul 2019 03:23:55 +0800
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Subject: [dpdk-dev] [PATCH v10 1/2] ring: add reset API to flush the ring
when not in use
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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 <gavin.hu@arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
Acked-by: Olivier Matz <olivier.matz@6wind.com>
---
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..510c138 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