ring.c

/*
 *   BSD LICENSE
 * 
 *   Copyright(c) 2007-2017 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.
 * 
 *  version: RWPA_VNF.L.18.02.0-42
 */

#include "ring.h"
#include "r-wpa_global_vars.h"

#include <rte_spinlock.h>

static rte_spinlock_t *ring_lock;

int
initialise_ring_lock(void)
{
    ring_lock = NULL;	

    ring_lock = malloc(sizeof(rte_spinlock_t));
    RWPA_CHECK_NOT_NULL(ring_lock);
    rte_spinlock_init(ring_lock);
    if (ring_lock == NULL) {
        return -1;
    }
    
    return 0;
}

struct rte_ring *
create_ring(const char *name, unsigned ring_size, int socket_id, unsigned flags)
{
    while (!rte_spinlock_trylock(ring_lock));
    
    struct rte_ring *ring;
    if (name == NULL)
            return NULL;
    /* If already create, just attached it */
    if (likely((ring = rte_ring_lookup(name)) != NULL)) {
            rte_spinlock_unlock(ring_lock);
            return ring;
    }
    ring = rte_ring_create(name, ring_size, socket_id, flags);
    rte_spinlock_unlock(ring_lock);

    return ring;
}