The function align-of
returns the alignment in bytes of the foreign language type named by type-name.
The following example shows types with various alignments.
(fli:align-of :char)
=>
1
(fli:align-of :int)
=>
4
(fli:align-of :double)
=>
8
(fli:align-of :pointer)
=>
4
LispWorks Foreign Language Interface User Guide and Reference Manual - 29 Sep 2017