Remove use of btr/bts instructions, which NaCl rejects
[glibc/nacl-glibc.git] / hurd / fd-close.c
blobf497d753bad1e86ddb4c08dd8331f3488f005c06
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 Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the 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 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 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;