1 | /* Copyright (C) 1994-2022 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 |
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. |
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 |
12 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, see |
16 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <hurd/fd.h> |
19 | |
20 | error_t |
21 | _hurd_fd_close (struct hurd_fd *fd) |
22 | { |
23 | error_t err; |
24 | |
25 | HURD_CRITICAL_BEGIN; |
26 | |
27 | __spin_lock (&fd->port.lock); |
28 | if (fd->port.port == MACH_PORT_NULL) |
29 | { |
30 | __spin_unlock (&fd->port.lock); |
31 | err = EBADF; |
32 | } |
33 | else |
34 | { |
35 | /* Clear the descriptor's port cells. |
36 | This deallocates the ports if noone else is still using them. */ |
37 | _hurd_port_set (&fd->ctty, MACH_PORT_NULL); |
38 | _hurd_port_locked_set (&fd->port, MACH_PORT_NULL); |
39 | err = 0; |
40 | } |
41 | |
42 | HURD_CRITICAL_END; |
43 | |
44 | return err; |
45 | } |
46 | |