MLton's foreign function interface (FFI) extends Standard ML and makes it easy to take the address of C global objects, access C global variables, call from SML to C, and call from C to SML. MLton also provides ML-NLFFI, which is a higher-level FFI for calling C functions and manipulating C data from SML.

Overview

• Foreign Function Interface Types

• Foreign Function Interface Syntax

Importing Code into SML

• Calling From SML To C

• Calling From SML To C Function Pointer

Exporting Code from SML

• Calling From C To SML