'\" te
.\" Copyright (c) 1995 IEEE  All Rights Reserved.
.\" Copyright (c) 2001, the Institute of Electrical and Electronics Engineers, Inc. and The Open Group. All Rights Reserved.
.\" Portions Copyright (c) 2001 Sun Microsystems, Inc.  All Rights Reserved
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.TH thr_getprio 3C "1 Apr 2008" "SunOS 5.11" "Standard C Library Functions"
.SH NAME
thr_getprio, thr_setprio \- access dynamic thread scheduling
.SH SYNOPSIS
.LP
.nf
cc -mt [ \fIflag\fR... ] \fIfile\fR...[ \fIlibrary\fR... ]
#include <thread.h> 

\fBint\fR \fBthr_setprio\fR(\fBthread_t\fR \fItarget_thread\fR, \fBint\fR \fIpriority\fR);
.fi

.LP
.nf
\fBint\fR \fBthr_getprio\fR(\fBthread_t\fR \fItarget_thread\fR, \fBint *\fR\fIpriority\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBthr_setprio()\fR function sets the scheduling priority for the thread specified by target_thread within the current process to the value given by priority.
.sp
.LP
The \fBthr_getprio()\fR function stores the current priority for the thread specified by \fItarget_thread\fR in the location pointed to by \fIpriority\fR.
.sp
.LP
If the \fBthr_setprio()\fR function fails, the scheduling priority of the target thread is not changed.
.sp
.LP
See \fBpriocntl\fR(2), \fBpthread_setschedprio\fR(3C), and \fBsched_setparam\fR(3C).
.SH RETURN VALUES
.sp
.LP
If successful, the \fBthr_getprio()\fR and \fBthr_setprio()\fR functions return \fB0\fR. Otherwise, an error number is returned to indicate the error.
.SH ERRORS
.sp
.LP
The \fBthr_getprio()\fR and \fBthr_setprio()\fR functions will fail if:
.sp
.ne 2
.mk
.na
\fB\fBESRCH\fR\fR
.ad
.RS 9n
.rt  
The value specified by \fItarget_thread\fR does not refer to an existing thread.
.RE

.sp
.LP
The  \fBthr_setprio()\fR function will fail if:
.sp
.ne 2
.mk
.na
\fB\fBEINVAL\fR\fR
.ad
.RS 10n
.rt  
The value of \fIpriority\fR is invalid for the scheduling policy of the specified thread.
.RE

.sp
.ne 2
.mk
.na
\fB\fBEPERM\fR\fR
.ad
.RS 10n
.rt  
The caller does not have the appropriate permission to set the priority to the value specified.
.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
\fBpriocntl\fR(2), \fBpthread_setschedprio\fR(3C), \fBsched_setparam\fR(3C), \fBthr_create\fR(3C), \fBthr_suspend\fR(3C), \fBthr_yield\fR(3C), \fBattributes\fR(5), \fBstandards\fR(5)