/*
 * Copyright (c) 2017, Nordic Semiconductor ASA
 * All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * 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. 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.
 *
 * 3. Neither the name of Nordic Semiconductor ASA 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 HOLDER 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.
 *
 */

/**
 * @file
 *   This file implements buffer management for frames received by nRF 802.15.4 radio driver.
 *
 */

#include "nrf_802154_rx_buffer.h"

#include <stddef.h>

#include "nrf_802154_config.h"

#if NRF_802154_RX_BUFFERS < 1
#error Not enough rx buffers in the 802.15.4 radio driver.
#endif

rx_buffer_t nrf_802154_rx_buffers[NRF_802154_RX_BUFFERS]; ///< Receive buffers.

void nrf_802154_rx_buffer_init(void)
{
    for (uint32_t i = 0; i < NRF_802154_RX_BUFFERS; i++)
    {
        nrf_802154_rx_buffers[i].free = true;
    }
}

rx_buffer_t * nrf_802154_rx_buffer_free_find(void)
{
    for (uint32_t i = 0; i < NRF_802154_RX_BUFFERS; i++)
    {
        if (nrf_802154_rx_buffers[i].free)
        {
            return &nrf_802154_rx_buffers[i];
        }
    }

    return NULL;
}