Function callback

example/multi.cc:10–23

A function to be called from Wasm code.

// A function to be called from Wasm code.
auto callback(
  const wasm::vec<wasm::Val>& args, wasm::vec<wasm::Val>& results
) -> wasm::own<wasm::Trap> {
  std::cout << "Calling back..." << std::endl;
  std::cout << "> " << args[0].i32();
  std::cout << " " << args[1].i64();
  std::cout << " " << args[2].i64();
  std::cout << " " << args[3].i32() << std::endl;
  results[0] = args[3].copy();
  results[1] = args[1].copy();
  results[2] = args[2].copy();
  results[3] = args[0].copy();
  return nullptr;
}


void run() {