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.\"
.\" This file and its contents are supplied under the terms of the
.\" Common Development and Distribution License ("CDDL"), version 1.0.
.\" You may only use this file in accordance with the terms of version
.\" 1.0 of the CDDL.
.\"
.\" A full copy of the text of the CDDL should have accompanied this
.\" source. A copy of the CDDL is also available via the Internet at
.\" http://www.illumos.org/license/CDDL.
.\"
.\"
.\" Copyright 2015 Joyent, Inc.
.\"
.Dd May 07, 2015
.Dt AVL_IS_EMPTY 3AVL
.Os
.Sh NAME
.Nm avl_is_empty
.Nd determine if an AVL tree is empty
.Sh SYNOPSIS
.Lb libavl
.In sys/avl.h
.Ft boolean_t
.Fo avl_is_empty
.Fa "avl_tree_t *tree"
.Fc
.Sh DESCRIPTION
The
.Fn avl_is_empty
function is used to determine whether or not the AVL tree,
.Fa tree ,
is empty.
If
.Fa tree
has zero nodes in it, then
.Sy B_TRUE
is returned, otherwise
.Sy B_FALSE
is returned.
.Sh RETURN VALUES
The
.Fn avl_is_empty
function returns
.Sy B_TRUE
when there are no nodes in the tree and
.Sy B_FALSE
otherwise.
.Sh EXAMPLES
See the
.Sy EXAMPLES
section in
.Xr libavl 3LIB .
.Sh INTERFACE STABILITY
.Sy Committed
.Sh MT-Level
See
.Sx Locking
in
.Xr libavl 3LIB .
.Sh SEE ALSO
.Xr libavl 3LIB
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