"""Optional native SETProtocol backend, configured by SETPROTOCOL_LIBRARY."""

from __future__ import annotations

def _load():
    try:
        from protocan.native import NativeProtocol
        return NativeProtocol()
    except (ImportError, OSError, RuntimeError):
        return None


SHARED_PROTOCOL = _load()


def get_shared_protocol():
    """Return SETProtocol, or None for source/test fallback builds."""
    return SHARED_PROTOCOL