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From: Bruce Richardson <bruce.richardson@intel.com>
To: olivier.matz@6wind.com
Cc: jerin.jacob@caviumnetworks.com, dev@dpdk.org,
Bruce Richardson <bruce.richardson@intel.com>
Date: Tue, 7 Mar 2017 11:32:05 +0000
Message-Id: <20170307113217.11077-3-bruce.richardson@intel.com>
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<20170307113217.11077-1-bruce.richardson@intel.com>
Subject: [dpdk-dev] [PATCH v2 02/14] ring: create common structure for prod
and cons metadata
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create a common structure to hold the metadata for the producer and
the consumer, since both need essentially the same information - the
head and tail values, the ring size and mask.
Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
V2: renamed the shared structure based on maintainer feedback.
---
lib/librte_ring/rte_ring.h | 32 ++++++++++++++++----------------
1 file changed, 16 insertions(+), 16 deletions(-)
diff --git a/lib/librte_ring/rte_ring.h b/lib/librte_ring/rte_ring.h
index 399ae3b..659c6d0 100644
--- a/lib/librte_ring/rte_ring.h
+++ b/lib/librte_ring/rte_ring.h
@@ -1,7 +1,7 @@
/*-
* BSD LICENSE
*
- * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ * Copyright(c) 2010-2017 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -147,6 +147,19 @@ struct rte_memzone; /* forward declaration, so as not to require memzone.h */
#define CONS_ALIGN RTE_CACHE_LINE_SIZE
#endif
+/* structure to hold a pair of head/tail values and other metadata */
+struct rte_ring_headtail {
+ volatile uint32_t head; /**< Prod/consumer head. */
+ volatile uint32_t tail; /**< Prod/consumer tail. */
+ uint32_t size; /**< Size of ring. */
+ uint32_t mask; /**< Mask (size-1) of ring. */
+ union {
+ uint32_t sp_enqueue; /**< True, if single producer. */
+ uint32_t sc_dequeue; /**< True, if single consumer. */
+ };
+ uint32_t watermark; /**< Max items before EDQUOT in producer. */
+};
+
/**
* An RTE ring structure.
*
@@ -169,23 +182,10 @@ struct rte_ring {
/**< Memzone, if any, containing the rte_ring */
/** Ring producer status. */
- struct prod {
- uint32_t watermark; /**< Maximum items before EDQUOT. */
- uint32_t sp_enqueue; /**< True, if single producer. */
- uint32_t size; /**< Size of ring. */
- uint32_t mask; /**< Mask (size-1) of ring. */
- volatile uint32_t head; /**< Producer head. */
- volatile uint32_t tail; /**< Producer tail. */
- } prod __rte_aligned(PROD_ALIGN);
+ struct rte_ring_headtail prod __rte_aligned(PROD_ALIGN);
/** Ring consumer status. */
- struct cons {
- uint32_t sc_dequeue; /**< True, if single consumer. */
- uint32_t size; /**< Size of the ring. */
- uint32_t mask; /**< Mask (size-1) of ring. */
- volatile uint32_t head; /**< Consumer head. */
- volatile uint32_t tail; /**< Consumer tail. */
- } cons __rte_aligned(CONS_ALIGN);
+ struct rte_ring_headtail cons __rte_aligned(CONS_ALIGN);
#ifdef RTE_LIBRTE_RING_DEBUG
struct rte_ring_debug_stats stats[RTE_MAX_LCORE];
--
2.9.3