异步调用

import ffi from 'liblibrary.so';

const handle = ffi.load('libffi_target.so');
ffi.defineFunction(handle, 'factorial', 'i', 'l');

ffi.callAsync(handle, 'factorial', 'i', 'l', [10], []).then((r: number) => {
  console.log(r); // 3628800
  ffi.close(handle);
});

function callAsync(
  handle: bigint,
  funcName: string,
  argTypes: string,
  returnType: string,
  numArgs: number[],
  strArgs: string[],
): Promise<number>;

import { AsyncCFunction, FFIType } from 'arkffi';
import ffi from 'liblibrary.so';

const handle = ffi.load('libffi_target.so');
const addPtr = ffi.getSymbolPtr(handle, 'add');

const asyncAdd = AsyncCFunction({
  args: [FFIType.double, FFIType.double],
  returns: FFIType.double,
  ptr: addPtr,
});

// 通过 .then 获取结果
asyncAdd(2.0, 3.0).then((r: number) => {
  console.log(r); // 5.0
});

// 多个调用并发执行
Promise.all([asyncAdd(1.0, 2.0), asyncAdd(3.0, 4.0)]).then((results) => {
  console.log(results); // [3.0, 7.0]
});

asyncAdd.close();
ffi.close(handle);

const Complex = Struct({
  real: FFIType.double,
  imag: FFIType.double,
});
const LibFFT = dlopen(LIB_NAME_FFT, {
  complex_new: { args: [FFIType.double, FFIType.double], returns: Complex },
  complex_add: { args: [Complex, Complex], returns: Complex },
  complex_sub: { args: [Complex, Complex], returns: Complex },
  complex_mul: { args: [Complex, Complex], returns: Complex },
  fft: { args: [FFIType.ptr, FFIType.int32], returns: FFIType.void }
});

let a = Complex.create({ real: 4, imag: 1 });
let b = Complex.create({ real: 3, imag: 3 });
LibFFT.symbols.complex_mul.async(a, b)
  .then((mulPtr) => {
    let mulVal = Complex.fromPtr(mulPtr);
    console.log('complex_mul', mulVal.real, mulVal.imag);
  })
  .finally(() => {
    LibFFT.close();
  });
console.log('LibFFT.symbols.complex_mul.async');