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581c785b | 1 | /* Copyright (C) 2006-2022 Free Software Foundation, Inc. |
7211eba6 ST |
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 | |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
7211eba6 ST |
17 | |
18 | #include <assert.h> | |
19 | #include <signal.h> | |
20 | #include <pthread.h> | |
21 | ||
22 | #define gai_start_notify_thread __gai_start_notify_thread | |
23 | #define gai_create_helper_thread __gai_create_helper_thread | |
24 | ||
25 | extern inline void | |
26 | __gai_start_notify_thread (void) | |
27 | { | |
28 | sigset_t ss; | |
29 | sigemptyset (&ss); | |
30 | int sigerr __attribute__ ((unused)); | |
31 | sigerr = pthread_sigmask (SIG_SETMASK, &ss, NULL); | |
32 | assert_perror (sigerr); | |
33 | } | |
34 | ||
35 | extern inline int | |
36 | __gai_create_helper_thread (pthread_t *threadp, void *(*tf) (void *), | |
37 | void *arg) | |
38 | { | |
39 | pthread_attr_t attr; | |
40 | ||
41 | /* Make sure the thread is created detached. */ | |
42 | pthread_attr_init (&attr); | |
43 | pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); | |
44 | ||
45 | /* The helper thread needs only very little resources. */ | |
46 | (void) pthread_attr_setstacksize (&attr, 0x10000); | |
47 | ||
48 | /* Block all signals in the helper thread. To do this thoroughly we | |
49 | temporarily have to block all signals here. */ | |
50 | sigset_t ss; | |
51 | sigset_t oss; | |
52 | sigfillset (&ss); | |
53 | int sigerr __attribute__ ((unused)); | |
54 | sigerr = pthread_sigmask (SIG_SETMASK, &ss, &oss); | |
55 | assert_perror (sigerr); | |
56 | ||
57 | int ret = pthread_create (threadp, &attr, tf, arg); | |
58 | ||
59 | /* Restore the signal mask. */ | |
60 | sigerr = pthread_sigmask (SIG_SETMASK, &oss, NULL); | |
61 | assert_perror (sigerr); | |
62 | ||
63 | (void) pthread_attr_destroy (&attr); | |
64 | return ret; | |
65 | } | |
66 | ||
67 | #include_next <gai_misc.h> |