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.\" $OpenBSD: pthread_main_np.3,v 1.6 2013/06/05 03:44:50 tedu Exp $
.\"
.\" Peter Valchev <pvalchev@openbsd.org> Public Domain, 2001
.\"
.Dd $Mdocdate: June 5 2013 $
.Dt PTHREAD_MAIN_NP 3
.Os
.Sh NAME
.Nm pthread_main_np
.Nd identify the main thread
.Sh SYNOPSIS
.In pthread.h
.In pthread_np.h
.Ft int
.Fn pthread_main_np "void"
.Sh DESCRIPTION
The
.Fn pthread_main_np
function identifies the main thread.
.Sh RETURN VALUES
The
.Fn pthread_main_np
function returns:
.Bl -tag -width hrmf
.It 1
if the calling thread is the main thread
.It 0
if the calling thread is not the main thread
.It -1
if the thread initialization has not completed
.El
.Sh SEE ALSO
.Xr pthread_self 3 ,
.Xr pthreads 3
.Sh STANDARDS
The
.Fn pthread_main_np
function is non-portable and may not be supported with the above
semantics on other POSIX systems.
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