asio-based "socketpair" for Win32

my_socketpair.cpp

#include <iostream>
#include <cstdint>
#include "asio.hpp"

using namespace std;
using asio::ip::tcp;

void my_socketpair(asio::io_service &ios, tcp::socket &s1, tcp::socket &s2) {
    // uses a strategy cribbed from Cygwin to mimick a posix socket pair on win32

    try {
        // open a listener and let the OS choose a port
        tcp::acceptor acceptor(ios, tcp::endpoint(asio::ip::address_v4::loopback(), 0));
        // read off what port the OS gave us
        uint16_t port = acceptor.local_endpoint().port();

        // connect to that port
        s1.connect(tcp::endpoint(asio::ip::address_v4::loopback(), port));

        // accept the connection on the second socket
        acceptor.accept(s2);

        // close the acceptor
        acceptor.close();
    } catch (exception &e) {
        cerr << "Socket error: " << e.what() << endl;
        s1.close();
        s2.close();
    }
}