Function cleanup

src/subprocess.cpp:257–272

namespace internal {

static void cleanup(
    const Future<Option<int>>& result,
    Promise<Option<int>>* promise,
    const Subprocess& subprocess)
{
  CHECK(!result.isPending());
  CHECK(!result.isDiscarded());

  if (result.isFailed()) {
    promise->fail(result.failure());
  } else {
    promise->set(result.get());
  }

  delete promise;
}


static void close(std::initializer_list<int_fd> fds)