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.TH PTHREAD_ATTR_GETSCHEDPARAM 3C "Apr 1, 2008"
.SH NAME
pthread_attr_getschedparam, pthread_attr_setschedparam \- get or set schedparam
attribute
.SH SYNOPSIS
.LP
.nf
cc -mt [ \fIflag\fR... ] \fIfile\fR... -lpthread [ \fIlibrary\fR... ]
#include <pthread.h>

\fBint\fR \fBpthread_attr_getschedparam\fR(\fBconst pthread_attr_t *restrict\fR \fIattr\fR,
     \fBstruct sched_param *restrict\fR \fIparam\fR);
.fi

.LP
.nf
\fBint\fR \fBpthread_attr_setschedparam\fR(\fBpthread_attr_t *restrict\fR \fIattr\fR,
     \fBconst struct sched_param *restrict\fR \fIparam\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The functions \fBpthread_attr_setschedparam()\fR and
\fBpthread_attr_getschedparam()\fR, respectively, set and get the scheduling
parameter attributes in the \fIattr\fR argument. The contents of the
\fIparam\fR structure are defined in \fB<sched.h>\fR\&. The only required
member of \fIparam\fR is \fIsched_priority\fR.
.SH RETURN VALUES
.sp
.LP
If successful, the \fBpthread_attr_setschedparam()\fR and
\fBpthread_attr_getschedparam()\fR functions return  \fB0\fR. Otherwise, an
error number is returned to indicate the error.
.SH ERRORS
.sp
.LP
The \fBpthread_attr_setschedparam()\fR function may fail if:
.sp
.ne 2
.na
\fB\fBEINVAL\fR\fR
.ad
.RS 10n
\fIattr\fR is invalid.
.RE

.sp
.LP
The \fBpthread_attr_getschedparam()\fR function may fail if:
.sp
.ne 2
.na
\fB\fBEINVAL\fR\fR
.ad
.RS 10n
\fIattr\fR or  \fIparam\fR is invalid.
.RE

.SH USAGE
.sp
.LP
After these attributes have been set, a thread can be created with the
specified attributes using \fBpthread_create()\fR. Using these routines does
not affect the current running thread.
.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(7) for descriptions of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
Interface Stability	Committed
_
MT-Level	MT-Safe
_
Standard	See \fBstandards\fR(7).
.TE

.SH SEE ALSO
.sp
.LP
.BR pthread_attr_init (3C),
.BR pthread_attr_setinheritsched (3C),
.BR pthread_attr_setschedpolicy (3C),
.BR pthread_attr_setscope (3C),
.BR pthread_create (3C),
.BR pthread_setschedparam (3C),
.BR attributes (7),
.BR standards (7)