Method TryAcquirePort

library/cpp/testing/common/network.cpp:197–213

    private:
        THolder<NTesting::IPort> TryAcquirePort(ui16 port) const {
            auto lock = MakeHolder<TFileLock>(TString(SyncDir_ / ::ToString(port)));
            if (!lock->TryAcquire()) {
                return nullptr;
            }

            TInet6StreamSocket sock;
            Y_VERIFY_SYSERROR(INVALID_SOCKET != static_cast<SOCKET>(sock));

            TSockAddrInet6 addr("::", port);
            if (sock.Bind(&addr) != 0) {
                lock->Release();
                Y_ABORT_UNLESS(EADDRINUSE == LastSystemError(), "unexpected error: %d, port: %d", LastSystemError(), port);
                return nullptr;
            }
            return MakeHolder<TPortGuard>(port, std::move(lock));
        }

    private:
        TFsPath SyncDir_;