/* GNU Mailutils -- a suite of utilities for electronic mail
   Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.

   This library 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 of the License, or (at your option) any later version.

   This library 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 this library; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA  */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#include <stdlib.h>
#include <mailutils/error.h>
#include <mailutils/sys/lockfile.h>

int
lockfile_ref (lockfile_t lockfile)
{
  if (lockfile == NULL || lockfile->vtable == NULL
      || lockfile->vtable->ref == NULL)
    return MU_ERROR_NOT_SUPPORTED;
  return lockfile->vtable->ref (lockfile);
}

void
lockfile_destroy (lockfile_t *plockfile)
{
  if (plockfile && *plockfile)
    {
      lockfile_t lockfile = *plockfile;
      if (lockfile->vtable && lockfile->vtable->destroy)
	lockfile->vtable->destroy (plockfile);
      *plockfile = NULL;
    }
}

int
lockfile_lock (lockfile_t lockfile)
{
  if (lockfile == NULL || lockfile->vtable == NULL
      || lockfile->vtable->lock == NULL)
    return MU_ERROR_NOT_SUPPORTED;
  return lockfile->vtable->lock (lockfile);
}

int
lockfile_touchlock (lockfile_t lockfile)
{
  if (lockfile == NULL || lockfile->vtable == NULL
      || lockfile->vtable->touchlock == NULL)
    return MU_ERROR_NOT_SUPPORTED;
  return lockfile->vtable->touchlock (lockfile);
}

int
lockfile_unlock (lockfile_t lockfile)
{
  if (lockfile == NULL || lockfile->vtable == NULL
      || lockfile->vtable->unlock == NULL)
    return MU_ERROR_NOT_SUPPORTED;
  return lockfile->vtable->unlock (lockfile);
}