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.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 n 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