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04277e02 | 1 | /* Copyright (C) 2004-2019 Free Software Foundation, Inc. |
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2 | This file is part of the GNU C Library. |
3 | Contributed by Jakub Jelinek <jakub@redhat.com>, 2004. | |
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 License as | |
7 | published by the Free Software Foundation; either version 2.1 of the | |
8 | 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 | |
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16 | License along with the GNU C Library; see the file COPYING.LIB. If |
17 | not, see <http://www.gnu.org/licenses/>. */ | |
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18 | |
19 | #ifndef _AIO_MISC_H | |
20 | # include_next <aio_misc.h> | |
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21 | # include <limits.h> |
22 | # include <pthread.h> | |
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23 | # include <signal.h> |
24 | # include <sysdep.h> | |
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25 | |
26 | # define aio_start_notify_thread __aio_start_notify_thread | |
27 | # define aio_create_helper_thread __aio_create_helper_thread | |
28 | ||
29 | extern inline void | |
30 | __aio_start_notify_thread (void) | |
31 | { | |
32 | sigset_t ss; | |
33 | sigemptyset (&ss); | |
34 | INTERNAL_SYSCALL_DECL (err); | |
35 | INTERNAL_SYSCALL (rt_sigprocmask, err, 4, SIG_SETMASK, &ss, NULL, _NSIG / 8); | |
36 | } | |
37 | ||
38 | extern inline int | |
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39 | __aio_create_helper_thread (pthread_t *threadp, void *(*tf) (void *), |
40 | void *arg) | |
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41 | { |
42 | pthread_attr_t attr; | |
43 | ||
44 | /* Make sure the thread is created detached. */ | |
45 | pthread_attr_init (&attr); | |
46 | pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); | |
47 | ||
48 | /* The helper thread needs only very little resources. */ | |
23287237 | 49 | (void) pthread_attr_setstacksize (&attr, __pthread_get_minstack (&attr)); |
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50 | |
51 | /* Block all signals in the helper thread. To do this thoroughly we | |
52 | temporarily have to block all signals here. */ | |
53 | sigset_t ss; | |
54 | sigset_t oss; | |
55 | sigfillset (&ss); | |
56 | INTERNAL_SYSCALL_DECL (err); | |
57 | INTERNAL_SYSCALL (rt_sigprocmask, err, 4, SIG_SETMASK, &ss, &oss, _NSIG / 8); | |
58 | ||
59 | int ret = pthread_create (threadp, &attr, tf, arg); | |
60 | ||
61 | /* Restore the signal mask. */ | |
62 | INTERNAL_SYSCALL (rt_sigprocmask, err, 4, SIG_SETMASK, &oss, NULL, | |
63 | _NSIG / 8); | |
64 | ||
65 | (void) pthread_attr_destroy (&attr); | |
66 | return ret; | |
88bce79e | 67 | } |
ffdd5e50 | 68 | #endif |