/* Store allocation/deallocation

   Copyright (C) 1995, 1996 Free Software Foundation, Inc.

   Written by Miles Bader <miles@gnu.ai.mit.edu>

   This file is part of the GNU Hurd.

   The GNU Hurd is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License as
   published by the Free Software Foundation; either version 2, or (at
   your option) any later version.

   The GNU Hurd 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
   General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */

#include <malloc.h>

#include "store.h"

/* Allocate a new store structure of class CLASS, with meths METHS, and the
   various other fields initialized to the given parameters.  */
struct store *
_make_store (enum file_storage_class class, struct store_meths *meths,
	     mach_port_t port, size_t block_size,
	     const off_t *runs, size_t runs_len, off_t end)
{
  if (block_size & (block_size - 1))
    return 0;			/* block size not a power of two.  */
  else
    {
      struct store *store = malloc (sizeof (struct store));
      if (store)
	{
	  store->name = 0;
	  store->port = port;
	  store->runs = 0;
	  store->runs_len = 0;
	  store->wrap_src = 0;
	  store->wrap_dst = 0;
	  store->end = end;
	  store->block_size = block_size;
	  store->source = MACH_PORT_NULL;
	  store->blocks = 0;
	  store->size = 0;
	  store->log2_block_size = 0;
	  store->log2_blocks_per_page = 0;
	  store->misc = 0;
	  store->hook = 0;

	  store->class = class;
	  store->meths = meths;

	  store_set_runs (store, runs, runs_len); /* Calls _store_derive() */
	}
      return store;
    }
}

void
store_free (struct store *store)
{
  if (store->meths->cleanup)
    (*store->meths->cleanup) (store);
  if (store->port != MACH_PORT_NULL)
    mach_port_deallocate (mach_task_self (), store->port);
  if (store->source != MACH_PORT_NULL)
    mach_port_deallocate (mach_task_self (), store->source);
  if (store->name)
    free (store->name);
  if (store->runs)
    free (store->runs);
  free (store);
}