/* * 
 * This file is part of bufferpool
 *
 * Copyright (C) 2007 by LScube team <team@streaming.polito.it>
 * See AUTHORS for more details
 * 
 * bufferpool is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * bufferpool is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with bufferpool; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 
 *
 */




#include <sys/mman.h>

#include <bufferpool.h>


/* ! Add and return a new consumer reference to the buffer,
 * @return NULL if an error occurs*/
BPConsumer *bp_ref(BPBuffer * buffer)
{
    BPConsumer *cons;
    ptrdiff_t i;

    if (!buffer)
        return NULL;

    if ((cons = (BPConsumer *) malloc(sizeof(BPConsumer))) == NULL)
        return NULL;

    cons->last_read_pos = -1;    // BPtoSlotPtr(buffer, NULL);
    cons->buffer = buffer;
    cons->frames = 0;
    cons->first_rtpseq = -1;
    cons->first_rtptime = -1;

    bp_lock(buffer);
    cons->read_pos = buffer->slots[buffer->control->write_pos].next;
    cons->last_seq = buffer->slots[buffer->control->write_pos].slot_seq;

    buffer->control->refs++;

    bp_unlock(buffer);

    bp_log(FNC_LOG_DEBUG, "Buffer ref (%d)\n", buffer->control->refs);

    return cons;
}