.\" Copyright (c) 2004-2007 Apple Inc. All rights reserved.
.Dd December 31, 2007
.Dt PTHREAD_ATTR 3
.Os
.Sh NAME
.Nm pthread_attr_destroy ,
.Nm pthread_attr_init
.Nd thread attribute operations
.Sh SYNOPSIS
.Fd #include <pthread.h>
.Ft int
.Fo pthread_attr_destroy
.Fa "pthread_attr_t *attr"
.Fc
.Ft int
.Fo pthread_attr_init
.Fa "pthread_attr_t *attr"
.Fc
.Sh DESCRIPTION
Thread attributes are used to specify parameters to
.Fn pthread_create .
One attribute object can be used in multiple calls to
.Fn pthread_create ,
with or without modifications between calls.
.Pp
The
.Fn pthread_attr_init
function initializes
.Fa attr
with all the default thread attributes.
.Pp
The
.Fn pthread_attr_destroy
function destroys
.Fa attr .
.Sh RETURN VALUES
If successful, these functions return 0.
Otherwise, an error number is returned to indicate the error.
.Sh ERRORS
.Fn pthread_attr_init
will fail if:
.Bl -tag -width Er
.\" ========
.It Bq Er ENOMEM
Out of memory.
.El
.Pp
.Fn pthread_attr_destroy
will fail if:
.Bl -tag -width Er
.\" ========
.It Bq Er EINVAL
Invalid value for
.Fa attr .
.El
.Pp
.Sh SEE ALSO
.Xr pthread_create 3
.Sh STANDARDS
.Fn pthread_attr_init ,
.Fn pthread_attr_destroy
conform to
.St -p1003.1-96
.Pp