Editing File: /usr/include/bits/sigthread.h

/* Signal handling function for threaded programs.
   Copyright (C) 1998-2018 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 <http://www.gnu.org/licenses/>.  */

#ifndef _BITS_SIGTHREAD_H
#define _BITS_SIGTHREAD_H	1

#if !defined _SIGNAL_H && !defined _PTHREAD_H
# error "Never include this file directly.  Use <signal.h> instead"
#endif

/* Functions for handling signals. */
#include <bits/types/__sigset_t.h>

/* Modify the signal mask for the calling thread.  The arguments have
   the same meaning as for sigprocmask(2). */
extern int pthread_sigmask (int __how,
			    const __sigset_t *__restrict __newmask,
			    __sigset_t *__restrict __oldmask)__THROW;

/* Send signal SIGNO to the given thread. */
extern int pthread_kill (pthread_t __threadid, int __signo) __THROW;

#ifdef __USE_GNU
/* Queue signal and data to a thread.  */
extern int pthread_sigqueue (pthread_t __threadid, int __signo,
			     const union sigval __value) __THROW;
#endif

#endif	/* bits/sigthread.h */

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