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

\fBint\fR \fBthr_setconcurrency\fR(\fBint\fR \fInew_level\fR);
.fi

.LP
.nf
\fBint\fR \fBthr_getconcurrency\fR(\fBvoid\fR);
.fi

.SH DESCRIPTION
.sp
.LP
These functions are obsolete and maintained for compatibility only.  The \fBthr_setconcurrency()\fR function updates the desired concurrency level that \fBlibthread\fR maintains for the calling process. This value does not affect the behavior of the calling process.
.sp
.LP
The \fBthr_getconcurrency()\fR function returns the current value for the desired concurrency level.
.SH RETURN VALUES
.sp
.LP
The \fBthr_getconcurrency()\fR function always returns the current value for the desired concurrency level.
.sp
.LP
If successful, the  \fBthr_setconcurrency()\fR function returns  \fB0\fR. Otherwise, a non-zero value is returned to indicate the error.
.SH ERRORS
.sp
.LP
The  \fBthr_setconcurrency()\fR function will fail if:
.sp
.ne 2
.mk
.na
\fB\fBEAGAIN\fR \fR
.ad
.RS 11n
.rt  
The specified concurrency level would cause a system resource to be exceeded.
.RE

.sp
.ne 2
.mk
.na
\fB\fBEINVAL\fR \fR
.ad
.RS 11n
.rt  
The value for \fInew_level\fR is negative.
.RE

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

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

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