Update.
[glibc.git] / hurd / fd-close.c
blobe1f5e26e687258bcc8e590ff2f0d5c6a47035c6f
1 /* Copyright (C) 1994, 1995, 1997 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If not,
16 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
19 #include <hurd/fd.h>
21 error_t
22 _hurd_fd_close (struct hurd_fd *fd)
24 error_t err;
26 HURD_CRITICAL_BEGIN;
28 __spin_lock (&fd->port.lock);
29 if (fd->port.port == MACH_PORT_NULL)
31 __spin_unlock (&fd->port.lock);
32 err = EBADF;
34 else
36 /* Clear the descriptor's port cells.
37 This deallocates the ports if noone else is still using them. */
38 _hurd_port_set (&fd->ctty, MACH_PORT_NULL);
39 _hurd_port_locked_set (&fd->port, MACH_PORT_NULL);
40 err = 0;
43 HURD_CRITICAL_END;
45 return err;