1.\" Copyright (c) 2003 Alexey Zelkin <phantom@FreeBSD.org> 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.\" $FreeBSD$ 26.\" 27.Dd October 12, 2021 28.Dt PTHREAD_MAIN_NP 3 29.Os 30.Sh NAME 31.Nm pthread_main_np 32.Nd identify the initial thread 33.Sh LIBRARY 34.Lb libpthread 35.Sh SYNOPSIS 36.In pthread_np.h 37.Ft int 38.Fn pthread_main_np void 39.Sh DESCRIPTION 40The 41.Fn pthread_main_np 42function 43is used in userland threads environment to identify the initial thread. 44Its semantics is similar to the Solaris's 45.Fn thr_main 46function. 47.Sh RETURN VALUES 48The 49.Fn pthread_main_np 50function returns 511 if the calling thread is the initial thread, 520 if the calling thread is not the initial thread, 53and \-1 if the thread's initialization has not yet completed. 54.Sh SEE ALSO 55.Xr pthread_create 3 , 56.Xr pthread_equal 3 , 57.Xr pthread_np 3 , 58.Xr pthread_self 3 59.Sh AUTHORS 60This manual page was written by 61.An Alexey Zelkin Aq Mt phantom@FreeBSD.org . 62