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68 lines
2.1 KiB
C
68 lines
2.1 KiB
C
/* Copyright (C) 2006-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <assert.h>
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#include <signal.h>
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#include <pthread.h>
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#define gai_start_notify_thread __gai_start_notify_thread
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#define gai_create_helper_thread __gai_create_helper_thread
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extern inline void
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__gai_start_notify_thread (void)
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{
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sigset_t ss;
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sigemptyset (&ss);
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int sigerr __attribute__ ((unused));
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sigerr = pthread_sigmask (SIG_SETMASK, &ss, NULL);
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assert_perror (sigerr);
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}
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extern inline int
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__gai_create_helper_thread (pthread_t *threadp, void *(*tf) (void *),
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void *arg)
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{
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pthread_attr_t attr;
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/* Make sure the thread is created detached. */
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pthread_attr_init (&attr);
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pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
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/* The helper thread needs only very little resources. */
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(void) pthread_attr_setstacksize (&attr, 0x10000);
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/* Block all signals in the helper thread. To do this thoroughly we
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temporarily have to block all signals here. */
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sigset_t ss;
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sigset_t oss;
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sigfillset (&ss);
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int sigerr __attribute__ ((unused));
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sigerr = pthread_sigmask (SIG_SETMASK, &ss, &oss);
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assert_perror (sigerr);
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int ret = pthread_create (threadp, &attr, tf, arg);
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/* Restore the signal mask. */
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sigerr = pthread_sigmask (SIG_SETMASK, &oss, NULL);
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assert_perror (sigerr);
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(void) pthread_attr_destroy (&attr);
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return ret;
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}
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#include_next <gai_misc.h>
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