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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 | } |