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storage_malloc.c

/*-
 * Copyright (c) 2006 Verdens Gang AS
 * Copyright (c) 2006 Linpro AS
 * All rights reserved.
 *
 * Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY AUTHOR 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 AUTHOR 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.
 *
 * $Id: storage_malloc.c 1183 2006-10-18 14:27:13Z des $
 *
 * Storage method based on malloc(3)
 */

#include <sys/types.h>

#include <stdlib.h>

#include "cache.h"

struct sma {
      struct storage          s;
};

static struct storage *
sma_alloc(struct stevedore *st, size_t size)
{
      struct sma *sma;

      sma = calloc(sizeof *sma, 1);
      XXXAN(sma);
      sma->s.priv = sma;
      sma->s.ptr = malloc(size);
      XXXAN(sma->s.ptr);
      sma->s.len = 0;
      sma->s.space = size;
      sma->s.fd = -1;
      sma->s.stevedore = st;
      return (&sma->s);
}

static void
sma_free(struct storage *s)
{
      struct sma *sma;

      sma = s->priv;
      free(sma->s.ptr);
      free(sma);
}

struct stevedore sma_stevedore = {
      .name =           "malloc",
      .alloc =    sma_alloc,
      .free =           sma_free
};

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