1 | /* Demux messages sent on the signal port. |
2 | Copyright (C) 1991-2024 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <hurd.h> |
20 | #include <hurd/signal.h> |
21 | #include <stddef.h> |
22 | |
23 | static boolean_t |
24 | msgport_server (mach_msg_header_t *inp, |
25 | mach_msg_header_t *outp) |
26 | { |
27 | extern boolean_t _S_msg_server (mach_msg_header_t *inp, |
28 | mach_msg_header_t *outp); |
29 | extern boolean_t _S_exc_server (mach_msg_header_t *inp, |
30 | mach_msg_header_t *outp); |
31 | |
32 | return (_S_exc_server (inp, outp) |
33 | || _S_msg_server (inp, outp)); |
34 | } |
35 | |
36 | /* This is the code that the signal thread runs. */ |
37 | void * |
38 | _hurd_msgport_receive (void *arg) |
39 | { |
40 | /* Get our own sigstate cached so we never again have to take a lock to |
41 | fetch it. There is much code in hurdsig.c that operates with some |
42 | sigstate lock held, which will deadlock with _hurd_thread_sigstate. |
43 | |
44 | Furthermore, in the pthread case this is the convenient spot |
45 | to initialize _hurd_msgport_thread (see hurdsig.c:_hurdsig_init). */ |
46 | |
47 | _hurd_msgport_thread = _hurd_self_sigstate ()->thread; |
48 | |
49 | while (1) |
50 | (void) __mach_msg_server (msgport_server, __vm_page_size, _hurd_msgport); |
51 | } |
52 | |