.\"     $NetBSD: pthread_getname_np.3,v 1.4 2010/07/09 07:31:01 jruoho Exp $
.\"
.\" Copyright (c)2007 YAMAMOTO Takashi,
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.\" ------------------------------------------------------------
.Dd July 9, 2010
.Dt PTHREAD_GETNAME_NP 3
.Os
.Sh NAME
.Nm pthread_getname_np
.Nd get and set descriptive name of a thread
.\" ------------------------------------------------------------
.Sh LIBRARY
.Lb libpthread
.\" ------------------------------------------------------------
.Sh SYNOPSIS
.In pthread.h
.Ft int
.Fn pthread_getname_np "pthread_t thread" "char *name" "size_t len"
.Ft int
.Fn pthread_setname_np "pthread_t thread" "const char *name" "void *arg"
.\" ------------------------------------------------------------
.Sh DESCRIPTION
The
.Fn pthread_getname_np
function obtains the descriptive name of a thread.
It takes the following arguments:
.Bl -tag -width target -offset indent
.It Fa thread
The thread whose descriptive name will be obtained.
.It Fa name
The buffer to be filled with the descriptive name of the thread.
.It Fa len
The size of the buffer
.Fa name
in bytes.
.El
.Pp
The
.Fn pthread_setname_np
function sets the descriptive name of a thread.
It takes the following arguments:
.Bl -tag -width target -offset indent
.It Fa thread
The thread whose descriptive name will be set.
.It Fa name
The
.Xr printf 3
format string to be used to construct the descriptive name of the thread.
The resulted descriptive name should be shorter than
.Dv PTHREAD_MAX_NAMELEN_NP .
.It Fa arg
The
.Xr printf 3
argument used with
.Fa name .
.El
.\" ------------------------------------------------------------
.Sh RETURN VALUES
Both functions return 0 on success.
Otherwise, an error number is returned to indicate the error.
.\" ------------------------------------------------------------
.Sh COMPATIBILITY
Both functions are non-standard extensions.
.\" ------------------------------------------------------------
.Sh ERRORS
Both functions may fail if:
.Bl -tag -width Er
.It Bq Er EINVAL
Invalid parameter.
.It Bq Er ESRCH
Non-existent
.Fa thread .
.El
.Pp
The
.Fn pthread_setname_np
function may also fail if:
.Bl -tag -width Er
.It Bq Er ENOMEM
There was insufficient memory for the operation.
.El
.Sh SEE ALSO
.Xr pthread_attr_get_np 3 ,
.Xr pthread_attr_getname_np 3