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.h> |
19 | #include <hurd/signal.h> |
20 | #include <hurd/msg.h> |
21 | #include <setjmp.h> |
22 | |
23 | /* Handle signal SIGNO in the calling thread. |
24 | If SS is not NULL it is the sigstate for the calling thread; |
25 | SS->lock is held on entry and released before return. */ |
26 | |
27 | int |
28 | _hurd_raise_signal (struct hurd_sigstate *ss, |
29 | int signo, const struct hurd_signal_detail *detail) |
30 | { |
31 | if (signo <= 0 || signo >= NSIG) |
32 | { |
33 | if (ss) |
34 | __spin_unlock (&ss->lock); |
35 | return EINVAL; |
36 | } |
37 | |
38 | if (ss == NULL) |
39 | { |
40 | ss = _hurd_self_sigstate (); |
41 | __spin_lock (&ss->lock); |
42 | } |
43 | |
44 | /* Mark SIGNO as pending to be delivered. */ |
45 | __sigaddset (set: &ss->pending, sig: signo); |
46 | ss->pending_data[signo] = *detail; |
47 | |
48 | __spin_unlock (&ss->lock); |
49 | |
50 | /* Send a message to the signal thread so it will wake up and check for |
51 | pending signals. This is a generic "poll request" message (SIGNO==0) |
52 | rather than delivering this signal and its detail, because we have |
53 | already marked the signal as pending for the particular thread we |
54 | want. Generating the signal with an RPC might deliver it to some |
55 | other thread. */ |
56 | return __msg_sig_post (_hurd_msgport, 0, 0, __mach_task_self ()); |
57 | } |
58 | libc_hidden_def (_hurd_raise_signal) |
59 | |