static void process_start(
const std::error_code& ec,
asio::io_service& io_service)
{
assert(!ec);
std::shared_ptr<myapp> app(new myapp(io_service));
io_service.post(std::bind(&myapp::start, app));
}
void insert(std::function<void(void)> f) {
io_service.post(f);
}