Wait for a Socket to Become Writable

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Demonstrates Socket.SelectForWriting, which waits for the socket, or sockets in a socket set, to become writable. It returns 1 if writable, 0 on timeout, or -1 on error.

let socket = chilkat::Socket::new();

// Connect to the server using TLS.
let b_tls = true;
let max_wait_ms = 5000;
if socket.connect("example.com", 5000, b_tls, max_wait_ms).is_err() {
    println!("{}", socket.last_error_text());
    return;
}

// Wait up to 5 seconds for the socket (or sockets in a socket set) to become writable.  Returns 1 if
// writable, 0 on timeout, or -1 on error.
let ready = socket.select_for_writing(5000);
if ready < 0 {
    println!("{}", socket.last_error_text());
    return;
}

if ready != 1 {
    println!("The socket did not become writable before the timeout.");
    return;
}

println!("The socket is ready for writing.");