ffi.DynamicLibrary.getFunction

Resolves a symbol and returns a callable JavaScript wrapper.

The returned function has a .pointer property containing the native function address as a bigint.

If the same symbol has already been resolved, requesting it again with a different signature throws.

const { DynamicLibrary } = require('node:ffi');

const lib = new DynamicLibrary('./mylib.so');
const add = lib.getFunction('add_i32', {
  arguments: ['i32', 'i32'],
  return: 'i32',
});

console.log(add(20, 22));
console.log(add.pointer);