'\" te
.\"  Copyright (c) 1998 Sun Microsystems, Inc. - All Rights Reserved.
.TH thr_main 3C "11 May 1998" "SunOS 5.11" "Standard C Library Functions"
.SH NAME
thr_main \- identify the main thread
.SH SYNOPSIS
.LP
.nf
cc -mt [ \fIflag\fR... ] \fIfile\fR... [ \fIlibrary\fR... ]
#include <thread.h>

\fBint\fR \fBthr_main\fR(\fBvoid\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The  \fBthr_main()\fR function  returns one of the following:
.sp
.ne 2
.mk
.na
\fB\fB1\fR \fR
.ad
.RS 7n
.rt  
if the calling thread is the main thread
.RE

.sp
.ne 2
.mk
.na
\fB\fB0\fR \fR
.ad
.RS 7n
.rt  
if the calling thread is not the main thread
.RE

.sp
.ne 2
.mk
.na
\fB-\fB1\fR \fR
.ad
.RS 7n
.rt  
if  \fBlibthread\fR is not linked in or thread initialization has not completed
.RE

.SH FILES
.sp
.ne 2
.mk
.na
\fB\fB/lib/libthread\fR \fR
.ad
.RS 19n
.rt  

.RE

.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp

.sp
.TS
tab() box;
lw(2.75i) |lw(2.75i) 
lw(2.75i) |lw(2.75i) 
.
ATTRIBUTE TYPEATTRIBUTE VALUE
_
MT-LevelMT-Safe
.TE

.SH SEE ALSO
.sp
.LP
\fBthr_self\fR(3C), \fBattributes\fR(5)