/* * 
 * 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>


void bp_unref(BPConsumer * cons)
{
    if (cons) {
        bp_lock(cons->buffer);
        if (cons->buffer->control->refs > 0) {
            --(cons->buffer->control->refs);
//                      if ( msync(cons->buffer->control, sizeof(BPControl), MS_ASYNC) )
//                              printf("*** msync error\n");
            bp_unlock(cons->buffer);
            //Now consumer has to read all unread slots
            while (!bp_gotreader(cons));
        } else
            bp_unlock(cons->buffer);

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