Function TryConnect

library/cpp/coroutine/engine/helper.cpp:8–21

namespace NCoro {

    bool TryConnect(const TString& host, ui16 port, TDuration timeout) {
        bool connected = false;

        auto f = [&connected, &host, port, timeout](TCont* c) {
            TSocketHolder socket;
            TNetworkAddress address(host, port);
            connected = (0 == NCoro::ConnectT(c, socket, address, timeout));
        };

        TContExecutor e(128 * 1024);
        e.Create(f, "try_connect");
        e.Execute();
        return connected;
    }

    bool WaitUntilConnectable(const TString& host, ui16 port, TDuration timeout) {
        const TInstant deadline = timeout.ToDeadLine();