| /* Copyright (C) 2004-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Jakub Jelinek <jakub@redhat.com>, 2004. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public License as |
| published by the Free Software Foundation; either version 2.1 of the |
| License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; see the file COPYING.LIB. If |
| not, see <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef _AIO_MISC_H |
| # include_next <aio_misc.h> |
| # include <limits.h> |
| # include <pthread.h> |
| # include <signal.h> |
| # include <sysdep.h> |
| |
| # define aio_start_notify_thread __aio_start_notify_thread |
| # define aio_create_helper_thread __aio_create_helper_thread |
| |
| extern inline void |
| __aio_start_notify_thread (void) |
| { |
| sigset_t ss; |
| sigemptyset (&ss); |
| INTERNAL_SYSCALL_DECL (err); |
| INTERNAL_SYSCALL (rt_sigprocmask, err, 4, SIG_SETMASK, &ss, NULL, _NSIG / 8); |
| } |
| |
| extern |
| /* clang fails to inline properly in one case, and then linking fails |
| because the function was discarded, so ensure it's kept. */ |
| #ifndef UGLY_INLINE_HACK |
| inline |
| #endif |
| int |
| __aio_create_helper_thread (pthread_t *threadp, void *(*tf) (void *), |
| void *arg) |
| { |
| pthread_attr_t attr; |
| |
| /* Make sure the thread is created detached. */ |
| pthread_attr_init (&attr); |
| pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); |
| |
| /* The helper thread needs only very little resources. */ |
| (void) pthread_attr_setstacksize (&attr, __pthread_get_minstack (&attr)); |
| |
| /* Block all signals in the helper thread. To do this thoroughly we |
| temporarily have to block all signals here. */ |
| sigset_t ss; |
| sigset_t oss; |
| sigfillset (&ss); |
| INTERNAL_SYSCALL_DECL (err); |
| INTERNAL_SYSCALL (rt_sigprocmask, err, 4, SIG_SETMASK, &ss, &oss, _NSIG / 8); |
| |
| int ret = pthread_create (threadp, &attr, tf, arg); |
| |
| /* Restore the signal mask. */ |
| INTERNAL_SYSCALL (rt_sigprocmask, err, 4, SIG_SETMASK, &oss, NULL, |
| _NSIG / 8); |
| |
| (void) pthread_attr_destroy (&attr); |
| return ret; |
| } |
| #endif |