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1 | /* Copyright (C) 1994, 1995, 1997 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. | |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
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. | |
c84142e8 UD |
8 | |
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 | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
c84142e8 | 13 | |
41bdb6e2 AJ |
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. */ | |
28f540f4 RM |
18 | |
19 | #include <hurd/fd.h> | |
20 | ||
21 | error_t | |
22 | _hurd_fd_close (struct hurd_fd *fd) | |
23 | { | |
24 | error_t err; | |
25 | ||
26 | HURD_CRITICAL_BEGIN; | |
27 | ||
28 | __spin_lock (&fd->port.lock); | |
29 | if (fd->port.port == MACH_PORT_NULL) | |
30 | { | |
31 | __spin_unlock (&fd->port.lock); | |
32 | err = EBADF; | |
33 | } | |
34 | else | |
35 | { | |
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; | |
41 | } | |
42 | ||
43 | HURD_CRITICAL_END; | |
44 | ||
45 | return err; | |
46 | } |