C-function to elisp function (FFI for Emacs)

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2.3 C-function to elisp function ¶

(ffi-lambda FUNCTION RETURN-TYPE ARG-TYPES). Take a C function pointer and a description of its type, and return a Lisp function. Unlike define-ffi-function, this is not a macro. You may wish to cache these as each call to ffi-lambda makes a new CIF.