removed dpdk22 files

1 files changed, 0 insertions, 1251 deletions

diff --git a/src/dpdk22/lib/librte_ring/rte_ring.h b/src/dpdk22/lib/librte_ring/rte_ring.h
deleted file mode 100644
index de036cef..00000000
--- a/src/dpdk22/lib/librte_ring/rte_ring.h
+++ /dev/null
@@ -1,1251 +0,0 @@
-/*-
- *   BSD LICENSE
- *
- *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- *   All rights reserved.
- *
- *   Redistribution and use in source and binary forms, with or without
- *   modification, are permitted provided that the following conditions
- *   are met:
- *
- *     * Redistributions of source code must retain the above copyright
- *       notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above copyright
- *       notice, this list of conditions and the following disclaimer in
- *       the documentation and/or other materials provided with the
- *       distribution.
- *     * Neither the name of Intel Corporation nor the names of its
- *       contributors may be used to endorse or promote products derived
- *       from this software without specific prior written permission.
- *
- *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/*
- * Derived from FreeBSD's bufring.h
- *
- **************************************************************************
- *
- * Copyright (c) 2007-2009 Kip Macy kmacy@freebsd.org
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. The name of Kip Macy nor the names of other
- *    contributors may be used to endorse or promote products derived from
- *    this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- ***************************************************************************/
-
-#ifndef _RTE_RING_H_
-#define _RTE_RING_H_
-
-/**
- * @file
- * RTE Ring
- *
- * The Ring Manager is a fixed-size queue, implemented as a table of
- * pointers. Head and tail pointers are modified atomically, allowing
- * concurrent access to it. It has the following features:
- *
- * - FIFO (First In First Out)
- * - Maximum size is fixed; the pointers are stored in a table.
- * - Lockless implementation.
- * - Multi- or single-consumer dequeue.
- * - Multi- or single-producer enqueue.
- * - Bulk dequeue.
- * - Bulk enqueue.
- *
- * Note: the ring implementation is not preemptable. A lcore must not
- * be interrupted by another task that uses the same ring.
- *
- */
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#include <stdio.h>
-#include <stdint.h>
-#include <sys/queue.h>
-#include <errno.h>
-#include <rte_common.h>
-#include <rte_memory.h>
-#include <rte_lcore.h>
-#include <rte_atomic.h>
-#include <rte_branch_prediction.h>
-
-#define RTE_TAILQ_RING_NAME "RTE_RING"
-
-enum rte_ring_queue_behavior {
-	RTE_RING_QUEUE_FIXED = 0, /* Enq/Deq a fixed number of items from a ring */
-	RTE_RING_QUEUE_VARIABLE   /* Enq/Deq as many items a possible from ring */
-};
-
-#ifdef RTE_LIBRTE_RING_DEBUG
-/**
- * A structure that stores the ring statistics (per-lcore).
- */
-struct rte_ring_debug_stats {
-	uint64_t enq_success_bulk; /**< Successful enqueues number. */
-	uint64_t enq_success_objs; /**< Objects successfully enqueued. */
-	uint64_t enq_quota_bulk;   /**< Successful enqueues above watermark. */
-	uint64_t enq_quota_objs;   /**< Objects enqueued above watermark. */
-	uint64_t enq_fail_bulk;    /**< Failed enqueues number. */
-	uint64_t enq_fail_objs;    /**< Objects that failed to be enqueued. */
-	uint64_t deq_success_bulk; /**< Successful dequeues number. */
-	uint64_t deq_success_objs; /**< Objects successfully dequeued. */
-	uint64_t deq_fail_bulk;    /**< Failed dequeues number. */
-	uint64_t deq_fail_objs;    /**< Objects that failed to be dequeued. */
-} __rte_cache_aligned;
-#endif
-
-#define RTE_RING_NAMESIZE 32 /**< The maximum length of a ring name. */
-#define RTE_RING_MZ_PREFIX "RG_"
-
-#ifndef RTE_RING_PAUSE_REP_COUNT
-#define RTE_RING_PAUSE_REP_COUNT 0 /**< Yield after pause num of times, no yield
-                                    *   if RTE_RING_PAUSE_REP not defined. */
-#endif
-
-struct rte_memzone; /* forward declaration, so as not to require memzone.h */
-
-/**
- * An RTE ring structure.
- *
- * The producer and the consumer have a head and a tail index. The particularity
- * of these index is that they are not between 0 and size(ring). These indexes
- * are between 0 and 2^32, and we mask their value when we access the ring[]
- * field. Thanks to this assumption, we can do subtractions between 2 index
- * values in a modulo-32bit base: that's why the overflow of the indexes is not
- * a problem.
- */
-struct rte_ring {
-	char name[RTE_RING_NAMESIZE];    /**< Name of the ring. */
-	int flags;                       /**< Flags supplied at creation. */
-	const struct rte_memzone *memzone;
-			/**< 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_cache_aligned;
-
-	/** 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. */
-#ifdef RTE_RING_SPLIT_PROD_CONS
-	} cons __rte_cache_aligned;
-#else
-	} cons;
-#endif
-
-#ifdef RTE_LIBRTE_RING_DEBUG
-	struct rte_ring_debug_stats stats[RTE_MAX_LCORE];
-#endif
-
-	void * ring[0] __rte_cache_aligned; /**< Memory space of ring starts here.
-	                                     * not volatile so need to be careful
-	                                     * about compiler re-ordering */
-};
-
-#define RING_F_SP_ENQ 0x0001 /**< The default enqueue is "single-producer". */
-#define RING_F_SC_DEQ 0x0002 /**< The default dequeue is "single-consumer". */
-#define RTE_RING_QUOT_EXCEED (1 << 31)  /**< Quota exceed for burst ops */
-#define RTE_RING_SZ_MASK  (unsigned)(0x0fffffff) /**< Ring size mask */
-
-/**
- * @internal When debug is enabled, store ring statistics.
- * @param r
- *   A pointer to the ring.
- * @param name
- *   The name of the statistics field to increment in the ring.
- * @param n
- *   The number to add to the object-oriented statistics.
- */
-#ifdef RTE_LIBRTE_RING_DEBUG
-#define __RING_STAT_ADD(r, name, n) do {                        \
-		unsigned __lcore_id = rte_lcore_id();           \
-		if (__lcore_id < RTE_MAX_LCORE) {               \
-			r->stats[__lcore_id].name##_objs += n;  \
-			r->stats[__lcore_id].name##_bulk += 1;  \
-		}                                               \
-	} while(0)
-#else
-#define __RING_STAT_ADD(r, name, n) do {} while(0)
-#endif
-
-/**
- * Calculate the memory size needed for a ring
- *
- * This function returns the number of bytes needed for a ring, given
- * the number of elements in it. This value is the sum of the size of
- * the structure rte_ring and the size of the memory needed by the
- * objects pointers. The value is aligned to a cache line size.
- *
- * @param count
- *   The number of elements in the ring (must be a power of 2).
- * @return
- *   - The memory size needed for the ring on success.
- *   - -EINVAL if count is not a power of 2.
- */
-ssize_t rte_ring_get_memsize(unsigned count);
-
-/**
- * Initialize a ring structure.
- *
- * Initialize a ring structure in memory pointed by "r". The size of the
- * memory area must be large enough to store the ring structure and the
- * object table. It is advised to use rte_ring_get_memsize() to get the
- * appropriate size.
- *
- * The ring size is set to *count*, which must be a power of two. Water
- * marking is disabled by default. The real usable ring size is
- * *count-1* instead of *count* to differentiate a free ring from an
- * empty ring.
- *
- * The ring is not added in RTE_TAILQ_RING global list. Indeed, the
- * memory given by the caller may not be shareable among dpdk
- * processes.
- *
- * @param r
- *   The pointer to the ring structure followed by the objects table.
- * @param name
- *   The name of the ring.
- * @param count
- *   The number of elements in the ring (must be a power of 2).
- * @param flags
- *   An OR of the following:
- *    - RING_F_SP_ENQ: If this flag is set, the default behavior when
- *      using ``rte_ring_enqueue()`` or ``rte_ring_enqueue_bulk()``
- *      is "single-producer". Otherwise, it is "multi-producers".
- *    - RING_F_SC_DEQ: If this flag is set, the default behavior when
- *      using ``rte_ring_dequeue()`` or ``rte_ring_dequeue_bulk()``
- *      is "single-consumer". Otherwise, it is "multi-consumers".
- * @return
- *   0 on success, or a negative value on error.
- */
-int rte_ring_init(struct rte_ring *r, const char *name, unsigned count,
-	unsigned flags);
-
-/**
- * Create a new ring named *name* in memory.
- *
- * This function uses ``memzone_reserve()`` to allocate memory. Then it
- * calls rte_ring_init() to initialize an empty ring.
- *
- * The new ring size is set to *count*, which must be a power of
- * two. Water marking is disabled by default. The real usable ring size
- * is *count-1* instead of *count* to differentiate a free ring from an
- * empty ring.
- *
- * The ring is added in RTE_TAILQ_RING list.
- *
- * @param name
- *   The name of the ring.
- * @param count
- *   The size of the ring (must be a power of 2).
- * @param socket_id
- *   The *socket_id* argument is the socket identifier in case of
- *   NUMA. The value can be *SOCKET_ID_ANY* if there is no NUMA
- *   constraint for the reserved zone.
- * @param flags
- *   An OR of the following:
- *    - RING_F_SP_ENQ: If this flag is set, the default behavior when
- *      using ``rte_ring_enqueue()`` or ``rte_ring_enqueue_bulk()``
- *      is "single-producer". Otherwise, it is "multi-producers".
- *    - RING_F_SC_DEQ: If this flag is set, the default behavior when
- *      using ``rte_ring_dequeue()`` or ``rte_ring_dequeue_bulk()``
- *      is "single-consumer". Otherwise, it is "multi-consumers".
- * @return
- *   On success, the pointer to the new allocated ring. NULL on error with
- *    rte_errno set appropriately. Possible errno values include:
- *    - E_RTE_NO_CONFIG - function could not get pointer to rte_config structure
- *    - E_RTE_SECONDARY - function was called from a secondary process instance
- *    - EINVAL - count provided is not a power of 2
- *    - ENOSPC - the maximum number of memzones has already been allocated
- *    - EEXIST - a memzone with the same name already exists
- *    - ENOMEM - no appropriate memory area found in which to create memzone
- */
-struct rte_ring *rte_ring_create(const char *name, unsigned count,
-				 int socket_id, unsigned flags);
-/**
- * De-allocate all memory used by the ring.
- *
- * @param r
- *   Ring to free
- */
-void rte_ring_free(struct rte_ring *r);
-
-/**
- * Change the high water mark.
- *
- * If *count* is 0, water marking is disabled. Otherwise, it is set to the
- * *count* value. The *count* value must be greater than 0 and less
- * than the ring size.
- *
- * This function can be called at any time (not necessarily at
- * initialization).
- *
- * @param r
- *   A pointer to the ring structure.
- * @param count
- *   The new water mark value.
- * @return
- *   - 0: Success; water mark changed.
- *   - -EINVAL: Invalid water mark value.
- */
-int rte_ring_set_water_mark(struct rte_ring *r, unsigned count);
-
-/**
- * Dump the status of the ring to the console.
- *
- * @param f
- *   A pointer to a file for output
- * @param r
- *   A pointer to the ring structure.
- */
-void rte_ring_dump(FILE *f, const struct rte_ring *r);
-
-/* the actual enqueue of pointers on the ring.
- * Placed here since identical code needed in both
- * single and multi producer enqueue functions */
-#define ENQUEUE_PTRS() do { \
-	const uint32_t size = r->prod.size; \
-	uint32_t idx = prod_head & mask; \
-	if (likely(idx + n < size)) { \
-		for (i = 0; i < (n & ((~(unsigned)0x3))); i+=4, idx+=4) { \
-			r->ring[idx] = obj_table[i]; \
-			r->ring[idx+1] = obj_table[i+1]; \
-			r->ring[idx+2] = obj_table[i+2]; \
-			r->ring[idx+3] = obj_table[i+3]; \
-		} \
-		switch (n & 0x3) { \
-			case 3: r->ring[idx++] = obj_table[i++]; \
-			case 2: r->ring[idx++] = obj_table[i++]; \
-			case 1: r->ring[idx++] = obj_table[i++]; \
-		} \
-	} else { \
-		for (i = 0; idx < size; i++, idx++)\
-			r->ring[idx] = obj_table[i]; \
-		for (idx = 0; i < n; i++, idx++) \
-			r->ring[idx] = obj_table[i]; \
-	} \
-} while(0)
-
-/* the actual copy of pointers on the ring to obj_table.
- * Placed here since identical code needed in both
- * single and multi consumer dequeue functions */
-#define DEQUEUE_PTRS() do { \
-	uint32_t idx = cons_head & mask; \
-	const uint32_t size = r->cons.size; \
-	if (likely(idx + n < size)) { \
-		for (i = 0; i < (n & (~(unsigned)0x3)); i+=4, idx+=4) {\
-			obj_table[i] = r->ring[idx]; \
-			obj_table[i+1] = r->ring[idx+1]; \
-			obj_table[i+2] = r->ring[idx+2]; \
-			obj_table[i+3] = r->ring[idx+3]; \
-		} \
-		switch (n & 0x3) { \
-			case 3: obj_table[i++] = r->ring[idx++]; \
-			case 2: obj_table[i++] = r->ring[idx++]; \
-			case 1: obj_table[i++] = r->ring[idx++]; \
-		} \
-	} else { \
-		for (i = 0; idx < size; i++, idx++) \
-			obj_table[i] = r->ring[idx]; \
-		for (idx = 0; i < n; i++, idx++) \
-			obj_table[i] = r->ring[idx]; \
-	} \
-} while (0)
-
-/**
- * @internal Enqueue several objects on the ring (multi-producers safe).
- *
- * This function uses a "compare and set" instruction to move the
- * producer index atomically.
- *
- * @param r
- *   A pointer to the ring structure.
- * @param obj_table
- *   A pointer to a table of void * pointers (objects).
- * @param n
- *   The number of objects to add in the ring from the obj_table.
- * @param behavior
- *   RTE_RING_QUEUE_FIXED:    Enqueue a fixed number of items from a ring
- *   RTE_RING_QUEUE_VARIABLE: Enqueue as many items a possible from ring
- * @return
- *   Depend on the behavior value
- *   if behavior = RTE_RING_QUEUE_FIXED
- *   - 0: Success; objects enqueue.
- *   - -EDQUOT: Quota exceeded. The objects have been enqueued, but the
- *     high water mark is exceeded.
- *   - -ENOBUFS: Not enough room in the ring to enqueue, no object is enqueued.
- *   if behavior = RTE_RING_QUEUE_VARIABLE
- *   - n: Actual number of objects enqueued.
- */
-static inline int __attribute__((always_inline))
-__rte_ring_mp_do_enqueue(struct rte_ring *r, void * const *obj_table,
-			 unsigned n, enum rte_ring_queue_behavior behavior)
-{
-	uint32_t prod_head, prod_next;
-	uint32_t cons_tail, free_entries;
-	const unsigned max = n;
-	int success;
-	unsigned i, rep = 0;
-	uint32_t mask = r->prod.mask;
-	int ret;
-
-	/* move prod.head atomically */
-	do {
-		/* Reset n to the initial burst count */
-		n = max;
-
-		prod_head = r->prod.head;
-		cons_tail = r->cons.tail;
-		/* The subtraction is done between two unsigned 32bits value
-		 * (the result is always modulo 32 bits even if we have
-		 * prod_head > cons_tail). So 'free_entries' is always between 0
-		 * and size(ring)-1. */
-		free_entries = (mask + cons_tail - prod_head);
-
-		/* check that we have enough room in ring */
-		if (unlikely(n > free_entries)) {
-			if (behavior == RTE_RING_QUEUE_FIXED) {
-				__RING_STAT_ADD(r, enq_fail, n);
-				return -ENOBUFS;
-			}
-			else {
-				/* No free entry available */
-				if (unlikely(free_entries == 0)) {
-					__RING_STAT_ADD(r, enq_fail, n);
-					return 0;
-				}
-
-				n = free_entries;
-			}
-		}
-
-		prod_next = prod_head + n;
-		success = rte_atomic32_cmpset(&r->prod.head, prod_head,
-					      prod_next);
-	} while (unlikely(success == 0));
-
-	/* write entries in ring */
-	ENQUEUE_PTRS();
-	rte_smp_wmb();
-
-	/* if we exceed the watermark */
-	if (unlikely(((mask + 1) - free_entries + n) > r->prod.watermark)) {
-		ret = (behavior == RTE_RING_QUEUE_FIXED) ? -EDQUOT :
-				(int)(n | RTE_RING_QUOT_EXCEED);
-		__RING_STAT_ADD(r, enq_quota, n);
-	}
-	else {
-		ret = (behavior == RTE_RING_QUEUE_FIXED) ? 0 : n;
-		__RING_STAT_ADD(r, enq_success, n);
-	}
-
-	/*
-	 * If there are other enqueues in progress that preceded us,
-	 * we need to wait for them to complete
-	 */
-	while (unlikely(r->prod.tail != prod_head)) {
-		rte_pause();
-
-		/* Set RTE_RING_PAUSE_REP_COUNT to avoid spin too long waiting
-		 * for other thread finish. It gives pre-empted thread a chance
-		 * to proceed and finish with ring dequeue operation. */
-		if (RTE_RING_PAUSE_REP_COUNT &&
-		    ++rep == RTE_RING_PAUSE_REP_COUNT) {
-			rep = 0;
-			sched_yield();
-		}
-	}
-	r->prod.tail = prod_next;
-	return ret;
-}
-
-/**
- * @internal Enqueue several objects on a ring (NOT multi-producers safe).
- *
- * @param r
- *   A pointer to the ring structure.
- * @param obj_table
- *   A pointer to a table of void * pointers (objects).
- * @param n
- *   The number of objects to add in the ring from the obj_table.
- * @param behavior
- *   RTE_RING_QUEUE_FIXED:    Enqueue a fixed number of items from a ring
- *   RTE_RING_QUEUE_VARIABLE: Enqueue as many items a possible from ring
- * @return
- *   Depend on the behavior value
- *   if behavior = RTE_RING_QUEUE_FIXED
- *   - 0: Success; objects enqueue.
- *   - -EDQUOT: Quota exceeded. The objects have been enqueued, but the
- *     high water mark is exceeded.
- *   - -ENOBUFS: Not enough room in the ring to enqueue, no object is enqueued.
- *   if behavior = RTE_RING_QUEUE_VARIABLE
- *   - n: Actual number of objects enqueued.
- */
-static inline int __attribute__((always_inline))
-__rte_ring_sp_do_enqueue(struct rte_ring *r, void * const *obj_table,
-			 unsigned n, enum rte_ring_queue_behavior behavior)
-{
-	uint32_t prod_head, cons_tail;
-	uint32_t prod_next, free_entries;
-	unsigned i;
-	uint32_t mask = r->prod.mask;
-	int ret;
-
-	prod_head = r->prod.head;
-	cons_tail = r->cons.tail;
-	/* The subtraction is done between two unsigned 32bits value
-	 * (the result is always modulo 32 bits even if we have
-	 * prod_head > cons_tail). So 'free_entries' is always between 0
-	 * and size(ring)-1. */
-	free_entries = mask + cons_tail - prod_head;
-
-	/* check that we have enough room in ring */
-	if (unlikely(n > free_entries)) {
-		if (behavior == RTE_RING_QUEUE_FIXED) {
-			__RING_STAT_ADD(r, enq_fail, n);
-			return -ENOBUFS;
-		}
-		else {
-			/* No free entry available */
-			if (unlikely(free_entries == 0)) {
-				__RING_STAT_ADD(r, enq_fail, n);
-				return 0;
-			}
-
-			n = free_entries;
-		}
-	}
-
-	prod_next = prod_head + n;
-	r->prod.head = prod_next;
-
-	/* write entries in ring */
-	ENQUEUE_PTRS();
-	rte_smp_wmb();
-
-	/* if we exceed the watermark */
-	if (unlikely(((mask + 1) - free_entries + n) > r->prod.watermark)) {
-		ret = (behavior == RTE_RING_QUEUE_FIXED) ? -EDQUOT :
-			(int)(n | RTE_RING_QUOT_EXCEED);
-		__RING_STAT_ADD(r, enq_quota, n);
-	}
-	else {
-		ret = (behavior == RTE_RING_QUEUE_FIXED) ? 0 : n;
-		__RING_STAT_ADD(r, enq_success, n);
-	}
-
-	r->prod.tail = prod_next;
-	return ret;
-}
-
-/**
- * @internal Dequeue several objects from a ring (multi-consumers safe). When
- * the request objects are more than the available objects, only dequeue the
- * actual number of objects
- *
- * This function uses a "compare and set" instruction to move the
- * consumer index atomically.
- *
- * @param r
- *   A pointer to the ring structure.
- * @param obj_table
- *   A pointer to a table of void * pointers (objects) that will be filled.
- * @param n
- *   The number of objects to dequeue from the ring to the obj_table.
- * @param behavior
- *   RTE_RING_QUEUE_FIXED:    Dequeue a fixed number of items from a ring
- *   RTE_RING_QUEUE_VARIABLE: Dequeue as many items a possible from ring
- * @return
- *   Depend on the behavior value
- *   if behavior = RTE_RING_QUEUE_FIXED
- *   - 0: Success; objects dequeued.
- *   - -ENOENT: Not enough entries in the ring to dequeue; no object is
- *     dequeued.
- *   if behavior = RTE_RING_QUEUE_VARIABLE
- *   - n: Actual number of objects dequeued.
- */
-
-static inline int __attribute__((always_inline))
-__rte_ring_mc_do_dequeue(struct rte_ring *r, void **obj_table,
-		 unsigned n, enum rte_ring_queue_behavior behavior)
-{
-	uint32_t cons_head, prod_tail;
-	uint32_t cons_next, entries;
-	const unsigned max = n;
-	int success;
-	unsigned i, rep = 0;
-	uint32_t mask = r->prod.mask;
-
-	/* move cons.head atomically */
-	do {
-		/* Restore n as it may change every loop */
-		n = max;
-
-		cons_head = r->cons.head;
-		prod_tail = r->prod.tail;
-		/* The subtraction is done between two unsigned 32bits value
-		 * (the result is always modulo 32 bits even if we have
-		 * cons_head > prod_tail). So 'entries' is always between 0
-		 * and size(ring)-1. */
-		entries = (prod_tail - cons_head);
-
-		/* Set the actual entries for dequeue */
-		if (n > entries) {
-			if (behavior == RTE_RING_QUEUE_FIXED) {
-				__RING_STAT_ADD(r, deq_fail, n);
-				return -ENOENT;
-			}
-			else {
-				if (unlikely(entries == 0)){
-					__RING_STAT_ADD(r, deq_fail, n);
-					return 0;
-				}
-
-				n = entries;
-			}
-		}
-
-		cons_next = cons_head + n;
-		success = rte_atomic32_cmpset(&r->cons.head, cons_head,
-					      cons_next);
-	} while (unlikely(success == 0));
-
-	/* copy in table */
-	DEQUEUE_PTRS();
-	rte_smp_rmb();
-
-	/*
-	 * If there are other dequeues in progress that preceded us,
-	 * we need to wait for them to complete
-	 */
-	while (unlikely(r->cons.tail != cons_head)) {
-		rte_pause();
-
-		/* Set RTE_RING_PAUSE_REP_COUNT to avoid spin too long waiting
-		 * for other thread finish. It gives pre-empted thread a chance
-		 * to proceed and finish with ring dequeue operation. */
-		if (RTE_RING_PAUSE_REP_COUNT &&
-		    ++rep == RTE_RING_PAUSE_REP_COUNT) {
-			rep = 0;
-			sched_yield();
-		}
-	}
-	__RING_STAT_ADD(r, deq_success, n);
-	r->cons.tail = cons_next;
-
-	return behavior == RTE_RING_QUEUE_FIXED ? 0 : n;
-}
-
-/**
- * @internal Dequeue several objects from a ring (NOT multi-consumers safe).
- * When the request objects are more than the available objects, only dequeue
- * the actual number of objects
- *
- * @param r
- *   A pointer to the ring structure.
- * @param obj_table
- *   A pointer to a table of void * pointers (objects) that will be filled.
- * @param n
- *   The number of objects to dequeue from the ring to the obj_table.
- * @param behavior
- *   RTE_RING_QUEUE_FIXED:    Dequeue a fixed number of items from a ring
- *   RTE_RING_QUEUE_VARIABLE: Dequeue as many items a possible from ring
- * @return
- *   Depend on the behavior value
- *   if behavior = RTE_RING_QUEUE_FIXED
- *   - 0: Success; objects dequeued.
- *   - -ENOENT: Not enough entries in the ring to dequeue; no object is
- *     dequeued.
- *   if behavior = RTE_RING_QUEUE_VARIABLE
- *   - n: Actual number of objects dequeued.
- */
-static inline int __attribute__((always_inline))
-__rte_ring_sc_do_dequeue(struct rte_ring *r, void **obj_table,
-		 unsigned n, enum rte_ring_queue_behavior behavior)
-{
-	uint32_t cons_head, prod_tail;
-	uint32_t cons_next, entries;
-	unsigned i;
-	uint32_t mask = r->prod.mask;
-
-	cons_head = r->cons.head;
-	prod_tail = r->prod.tail;
-	/* The subtraction is done between two unsigned 32bits value
-	 * (the result is always modulo 32 bits even if we have
-	 * cons_head > prod_tail). So 'entries' is always between 0
-	 * and size(ring)-1. */
-	entries = prod_tail - cons_head;
-
-	if (n > entries) {
-		if (behavior == RTE_RING_QUEUE_FIXED) {
-			__RING_STAT_ADD(r, deq_fail, n);
-			return -ENOENT;
-		}
-		else {
-			if (unlikely(entries == 0)){
-				__RING_STAT_ADD(r, deq_fail, n);
-				return 0;
-			}
-
-			n = entries;
-		}
-	}
-
-	cons_next = cons_head + n;
-	r->cons.head = cons_next;
-
-	/* copy in table */
-	DEQUEUE_PTRS();
-	rte_smp_rmb();
-
-	__RING_STAT_ADD(r, deq_success, n);
-	r->cons.tail = cons_next;
-	return behavior == RTE_RING_QUEUE_FIXED ? 0 : n;
-}
-
-/**
- * Enqueue several objects on the ring (multi-producers safe).
- *
- * This function uses a "compare and set" instruction to move the
- * producer index atomically.
- *
- * @param r
- *   A pointer to the ring structure.
- * @param obj_table
- *   A pointer to a table of void * pointers (objects).
- * @param n
- *   The number of objects to add in the ring from the obj_table.
- * @return
- *   - 0: Success; objects enqueue.
- *   - -EDQUOT: Quota exceeded. The objects have been enqueued, but the
- *     high water mark is exceeded.
- *   - -ENOBUFS: Not enough room in the ring to enqueue, no object is enqueued.
- */
-static inline int __attribute__((always_inline))
-rte_ring_mp_enqueue_bulk(struct rte_ring *r, void * const *obj_table,
-			 unsigned n)
-{
-	return __rte_ring_mp_do_enqueue(r, obj_table, n, RTE_RING_QUEUE_FIXED);
-}
-
-/**
- * Enqueue several objects on a ring (NOT multi-producers safe).
- *
- * @param r
- *   A pointer to the ring structure.
- * @param obj_table
- *   A pointer to a table of void * pointers (objects).
- * @param n
- *   The number of objects to add in the ring from the obj_table.
- * @return
- *   - 0: Success; objects enqueued.
- *   - -EDQUOT: Quota exceeded. The objects have been enqueued, but the
- *     high water mark is exceeded.
- *   - -ENOBUFS: Not enough room in the ring to enqueue; no object is enqueued.
- */
-static inline int __attribute__((always_inline))
-rte_ring_sp_enqueue_bulk(struct rte_ring *r, void * const *obj_table,
-			 unsigned n)
-{
-	return __rte_ring_sp_do_enqueue(r, obj_table, n, RTE_RING_QUEUE_FIXED);
-}
-
-/**
- * Enqueue several objects on a ring.
- *
- * This function calls the multi-producer or the single-producer
- * version depending on the default behavior that was specified at
- * ring creation time (see flags).
- *
- * @param r
- *   A pointer to the ring structure.
- * @param obj_table
- *   A pointer to a table of void * pointers (objects).
- * @param n
- *   The number of objects to add in the ring from the obj_table.
- * @return
- *   - 0: Success; objects enqueued.
- *   - -EDQUOT: Quota exceeded. The objects have been enqueued, but the
- *     high water mark is exceeded.
- *   - -ENOBUFS: Not enough room in the ring to enqueue; no object is enqueued.
- */
-static inline int __attribute__((always_inline))
-rte_ring_enqueue_bulk(struct rte_ring *r, void * const *obj_table,
-		      unsigned n)
-{
-	if (r->prod.sp_enqueue)
-		return rte_ring_sp_enqueue_bulk(r, obj_table, n);
-	else
-		return rte_ring_mp_enqueue_bulk(r, obj_table, n);
-}
-
-/**
- * Enqueue one object on a ring (multi-producers safe).
- *
- * This function uses a "compare and set" instruction to move the
- * producer index atomically.
- *
- * @param r
- *   A pointer to the ring structure.
- * @param obj
- *   A pointer to the object to be added.
- * @return
- *   - 0: Success; objects enqueued.
- *   - -EDQUOT: Quota exceeded. The objects have been enqueued, but the
- *     high water mark is exceeded.
- *   - -ENOBUFS: Not enough room in the ring to enqueue; no object is enqueued.
- */
-static inline int __attribute__((always_inline))
-rte_ring_mp_enqueue(struct rte_ring *r, void *obj)
-{
-	return rte_ring_mp_enqueue_bulk(r, &obj, 1);
-}
-
-/**
- * Enqueue one object on a ring (NOT multi-producers safe).
- *
- * @param r
- *   A pointer to the ring structure.
- * @param obj
- *   A pointer to the object to be added.
- * @return
- *   - 0: Success; objects enqueued.
- *   - -EDQUOT: Quota exceeded. The objects have been enqueued, but the
- *     high water mark is exceeded.
- *   - -ENOBUFS: Not enough room in the ring to enqueue; no object is enqueued.
- */
-static inline int __attribute__((always_inline))
-rte_ring_sp_enqueue(struct rte_ring *r, void *obj)
-{
-	return rte_ring_sp_enqueue_bulk(r, &obj, 1);
-}
-
-/**
- * Enqueue one object on a ring.
- *
- * This function calls the multi-producer or the single-producer
- * version, depending on the default behaviour that was specified at
- * ring creation time (see flags).
- *
- * @param r
- *   A pointer to the ring structure.
- * @param obj
- *   A pointer to the object to be added.
- * @return
- *   - 0: Success; objects enqueued.
- *   - -EDQUOT: Quota exceeded. The objects have been enqueued, but the
- *     high water mark is exceeded.
- *   - -ENOBUFS: Not enough room in the ring to enqueue; no object is enqueued.
- */
-static inline int __attribute__((always_inline))
-rte_ring_enqueue(struct rte_ring *r, void *obj)
-{
-	if (r->prod.sp_enqueue)
-		return rte_ring_sp_enqueue(r, obj);
-	else
-		return rte_ring_mp_enqueue(r, obj);
-}
-
-/**
- * Dequeue several objects from a ring (multi-consumers safe).
- *
- * This function uses a "compare and set" instruction to move the
- * consumer index atomically.
- *
- * @param r
- *   A pointer to the ring structure.
- * @param obj_table
- *   A pointer to a table of void * pointers (objects) that will be filled.
- * @param n
- *   The number of objects to dequeue from the ring to the obj_table.
- * @return
- *   - 0: Success; objects dequeued.
- *   - -ENOENT: Not enough entries in the ring to dequeue; no object is
- *     dequeued.
- */
-static inline int __attribute__((always_inline))
-rte_ring_mc_dequeue_bulk(struct rte_ring *r, void **obj_table, unsigned n)
-{
-	return __rte_ring_mc_do_dequeue(r, obj_table, n, RTE_RING_QUEUE_FIXED);
-}
-
-/**
- * Dequeue several objects from a ring (NOT multi-consumers safe).
- *
- * @param r
- *   A pointer to the ring structure.
- * @param obj_table
- *   A pointer to a table of void * pointers (objects) that will be filled.
- * @param n
- *   The number of objects to dequeue from the ring to the obj_table,
- *   must be strictly positive.
- * @return
- *   - 0: Success; objects dequeued.
- *   - -ENOENT: Not enough entries in the ring to dequeue; no object is
- *     dequeued.
- */
-static inline int __attribute__((always_inline))
-rte_ring_sc_dequeue_bulk(struct rte_ring *r, void **obj_table, unsigned n)
-{
-	return __rte_ring_sc_do_dequeue(r, obj_table, n, RTE_RING_QUEUE_FIXED);
-}
-
-/**
- * Dequeue several objects from a ring.
- *
- * This function calls the multi-consumers or the single-consumer
- * version, depending on the default behaviour that was specified at
- * ring creation time (see flags).
- *
- * @param r
- *   A pointer to the ring structure.
- * @param obj_table
- *   A pointer to a table of void * pointers (objects) that will be filled.
- * @param n
- *   The number of objects to dequeue from the ring to the obj_table.
- * @return
- *   - 0: Success; objects dequeued.
- *   - -ENOENT: Not enough entries in the ring to dequeue, no object is
- *     dequeued.
- */
-static inline int __attribute__((always_inline))
-rte_ring_dequeue_bulk(struct rte_ring *r, void **obj_table, unsigned n)
-{
-	if (r->cons.sc_dequeue)
-		return rte_ring_sc_dequeue_bulk(r, obj_table, n);
-	else
-		return rte_ring_mc_dequeue_bulk(r, obj_table, n);
-}
-
-/**
- * Dequeue one object from a ring (multi-consumers safe).
- *
- * This function uses a "compare and set" instruction to move the
- * consumer index atomically.
- *
- * @param r
- *   A pointer to the ring structure.
- * @param obj_p
- *   A pointer to a void * pointer (object) that will be filled.
- * @return
- *   - 0: Success; objects dequeued.
- *   - -ENOENT: Not enough entries in the ring to dequeue; no object is
- *     dequeued.
- */
-static inline int __attribute__((always_inline))
-rte_ring_mc_dequeue(struct rte_ring *r, void **obj_p)
-{
-	return rte_ring_mc_dequeue_bulk(r, obj_p, 1);
-}
-
-/**
- * Dequeue one object from a ring (NOT multi-consumers safe).
- *
- * @param r
- *   A pointer to the ring structure.
- * @param obj_p
- *   A pointer to a void * pointer (object) that will be filled.
- * @return
- *   - 0: Success; objects dequeued.
- *   - -ENOENT: Not enough entries in the ring to dequeue, no object is
- *     dequeued.
- */
-static inline int __attribute__((always_inline))
-rte_ring_sc_dequeue(struct rte_ring *r, void **obj_p)
-{
-	return rte_ring_sc_dequeue_bulk(r, obj_p, 1);
-}
-
-/**
- * Dequeue one object from a ring.
- *
- * This function calls the multi-consumers or the single-consumer
- * version depending on the default behaviour that was specified at
- * ring creation time (see flags).
- *
- * @param r
- *   A pointer to the ring structure.
- * @param obj_p
- *   A pointer to a void * pointer (object) that will be filled.
- * @return
- *   - 0: Success, objects dequeued.
- *   - -ENOENT: Not enough entries in the ring to dequeue, no object is
- *     dequeued.
- */
-static inline int __attribute__((always_inline))
-rte_ring_dequeue(struct rte_ring *r, void **obj_p)
-{
-	if (r->cons.sc_dequeue)
-		return rte_ring_sc_dequeue(r, obj_p);
-	else
-		return rte_ring_mc_dequeue(r, obj_p);
-}
-
-/**
- * Test if a ring is full.
- *
- * @param r
- *   A pointer to the ring structure.
- * @return
- *   - 1: The ring is full.
- *   - 0: The ring is not full.
- */
-static inline int
-rte_ring_full(const struct rte_ring *r)
-{
-	uint32_t prod_tail = r->prod.tail;
-	uint32_t cons_tail = r->cons.tail;
-	return (((cons_tail - prod_tail - 1) & r->prod.mask) == 0);
-}
-
-/**
- * Test if a ring is empty.
- *
- * @param r
- *   A pointer to the ring structure.
- * @return
- *   - 1: The ring is empty.
- *   - 0: The ring is not empty.
- */
-static inline int
-rte_ring_empty(const struct rte_ring *r)
-{
-	uint32_t prod_tail = r->prod.tail;
-	uint32_t cons_tail = r->cons.tail;
-	return !!(cons_tail == prod_tail);
-}
-
-/**
- * Return the number of entries in a ring.
- *
- * @param r
- *   A pointer to the ring structure.
- * @return
- *   The number of entries in the ring.
- */
-static inline unsigned
-rte_ring_count(const struct rte_ring *r)
-{
-	uint32_t prod_tail = r->prod.tail;
-	uint32_t cons_tail = r->cons.tail;
-	return ((prod_tail - cons_tail) & r->prod.mask);
-}
-
-/**
- * Return the number of free entries in a ring.
- *
- * @param r
- *   A pointer to the ring structure.
- * @return
- *   The number of free entries in the ring.
- */
-static inline unsigned
-rte_ring_free_count(const struct rte_ring *r)
-{
-	uint32_t prod_tail = r->prod.tail;
-	uint32_t cons_tail = r->cons.tail;
-	return ((cons_tail - prod_tail - 1) & r->prod.mask);
-}
-
-/**
- * Dump the status of all rings on the console
- *
- * @param f
- *   A pointer to a file for output
- */
-void rte_ring_list_dump(FILE *f);
-
-/**
- * Search a ring from its name
- *
- * @param name
- *   The name of the ring.
- * @return
- *   The pointer to the ring matching the name, or NULL if not found,
- *   with rte_errno set appropriately. Possible rte_errno values include:
- *    - ENOENT - required entry not available to return.
- */
-struct rte_ring *rte_ring_lookup(const char *name);
-
-/**
- * Enqueue several objects on the ring (multi-producers safe).
- *
- * This function uses a "compare and set" instruction to move the
- * producer index atomically.
- *
- * @param r
- *   A pointer to the ring structure.
- * @param obj_table
- *   A pointer to a table of void * pointers (objects).
- * @param n
- *   The number of objects to add in the ring from the obj_table.
- * @return
- *   - n: Actual number of objects enqueued.
- */
-static inline unsigned __attribute__((always_inline))
-rte_ring_mp_enqueue_burst(struct rte_ring *r, void * const *obj_table,
-			 unsigned n)
-{
-	return __rte_ring_mp_do_enqueue(r, obj_table, n, RTE_RING_QUEUE_VARIABLE);
-}
-
-/**
- * Enqueue several objects on a ring (NOT multi-producers safe).
- *
- * @param r
- *   A pointer to the ring structure.
- * @param obj_table
- *   A pointer to a table of void * pointers (objects).
- * @param n
- *   The number of objects to add in the ring from the obj_table.
- * @return
- *   - n: Actual number of objects enqueued.
- */
-static inline unsigned __attribute__((always_inline))
-rte_ring_sp_enqueue_burst(struct rte_ring *r, void * const *obj_table,
-			 unsigned n)
-{
-	return __rte_ring_sp_do_enqueue(r, obj_table, n, RTE_RING_QUEUE_VARIABLE);
-}
-
-/**
- * Enqueue several objects on a ring.
- *
- * This function calls the multi-producer or the single-producer
- * version depending on the default behavior that was specified at
- * ring creation time (see flags).
- *
- * @param r
- *   A pointer to the ring structure.
- * @param obj_table
- *   A pointer to a table of void * pointers (objects).
- * @param n
- *   The number of objects to add in the ring from the obj_table.
- * @return
- *   - n: Actual number of objects enqueued.
- */
-static inline unsigned __attribute__((always_inline))
-rte_ring_enqueue_burst(struct rte_ring *r, void * const *obj_table,
-		      unsigned n)
-{
-	if (r->prod.sp_enqueue)
-		return rte_ring_sp_enqueue_burst(r, obj_table, n);
-	else
-		return rte_ring_mp_enqueue_burst(r, obj_table, n);
-}
-
-/**
- * Dequeue several objects from a ring (multi-consumers safe). When the request
- * objects are more than the available objects, only dequeue the actual number
- * of objects
- *
- * This function uses a "compare and set" instruction to move the
- * consumer index atomically.
- *
- * @param r
- *   A pointer to the ring structure.
- * @param obj_table
- *   A pointer to a table of void * pointers (objects) that will be filled.
- * @param n
- *   The number of objects to dequeue from the ring to the obj_table.
- * @return
- *   - n: Actual number of objects dequeued, 0 if ring is empty
- */
-static inline unsigned __attribute__((always_inline))
-rte_ring_mc_dequeue_burst(struct rte_ring *r, void **obj_table, unsigned n)
-{
-	return __rte_ring_mc_do_dequeue(r, obj_table, n, RTE_RING_QUEUE_VARIABLE);
-}
-
-/**
- * Dequeue several objects from a ring (NOT multi-consumers safe).When the
- * request objects are more than the available objects, only dequeue the
- * actual number of objects
- *
- * @param r
- *   A pointer to the ring structure.
- * @param obj_table
- *   A pointer to a table of void * pointers (objects) that will be filled.
- * @param n
- *   The number of objects to dequeue from the ring to the obj_table.
- * @return
- *   - n: Actual number of objects dequeued, 0 if ring is empty
- */
-static inline unsigned __attribute__((always_inline))
-rte_ring_sc_dequeue_burst(struct rte_ring *r, void **obj_table, unsigned n)
-{
-	return __rte_ring_sc_do_dequeue(r, obj_table, n, RTE_RING_QUEUE_VARIABLE);
-}
-
-/**
- * Dequeue multiple objects from a ring up to a maximum number.
- *
- * This function calls the multi-consumers or the single-consumer
- * version, depending on the default behaviour that was specified at
- * ring creation time (see flags).
- *
- * @param r
- *   A pointer to the ring structure.
- * @param obj_table
- *   A pointer to a table of void * pointers (objects) that will be filled.
- * @param n
- *   The number of objects to dequeue from the ring to the obj_table.
- * @return
- *   - Number of objects dequeued
- */
-static inline unsigned __attribute__((always_inline))
-rte_ring_dequeue_burst(struct rte_ring *r, void **obj_table, unsigned n)
-{
-	if (r->cons.sc_dequeue)
-		return rte_ring_sc_dequeue_burst(r, obj_table, n);
-	else
-		return rte_ring_mc_dequeue_burst(r, obj_table, n);
-}
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* _RTE_RING_H_ */