/* Copyright (C) 1994-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C 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 2.1 of the License, or (at your option) any later version.

   The GNU C 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 the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <hurd/fd.h>

error_t

_hurd_fd_close (struct hurd_fd *fd)

{

  error_t err;

  HURD_CRITICAL_BEGIN;

  __spin_lock (&fd->port.lock);

  if (fd->port.port == MACH_PORT_NULL)

    {

      __spin_unlock (&fd->port.lock);

      err = EBADF;

    }

  else

    {

      /* Clear the descriptor's port cells.

	 This deallocates the ports if noone else is still using them.  */

      _hurd_port_set (&fd->ctty, MACH_PORT_NULL);

      _hurd_port_locked_set (&fd->port, MACH_PORT_NULL);

      err = 0;

    }

  HURD_CRITICAL_END;

  return err;

}