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/* Copyright (C) 2004-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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 <https://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_CALL (rt_sigprocmask, SIG_SETMASK, &ss, NULL,
__NSIG_BYTES);
}
extern inline 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. */
__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_CALL (rt_sigprocmask, SIG_SETMASK, &ss, &oss,
__NSIG_BYTES);
int ret = __pthread_create (threadp, &attr, tf, arg);
/* Restore the signal mask. */
INTERNAL_SYSCALL_CALL (rt_sigprocmask, SIG_SETMASK, &oss, NULL,
__NSIG_BYTES);
__pthread_attr_destroy (&attr);
return ret;
}
#endif
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