| """Import basic exposure of libzmq C API as a backend""" | |
| # Copyright (C) PyZMQ Developers | |
| # Distributed under the terms of the Modified BSD License. | |
| import os | |
| import platform | |
| from .select import public_api, select_backend | |
| if 'PYZMQ_BACKEND' in os.environ: | |
| backend = os.environ['PYZMQ_BACKEND'] | |
| if backend in ('cython', 'cffi'): | |
| backend = f'zmq.backend.{backend}' | |
| _ns = select_backend(backend) | |
| else: | |
| # default to cython, fallback to cffi | |
| # (reverse on PyPy) | |
| if platform.python_implementation() == 'PyPy': | |
| first, second = ('zmq.backend.cffi', 'zmq.backend.cython') | |
| else: | |
| first, second = ('zmq.backend.cython', 'zmq.backend.cffi') | |
| try: | |
| _ns = select_backend(first) | |
| except Exception as original_error: | |
| try: | |
| _ns = select_backend(second) | |
| except ImportError: | |
| raise original_error from None | |
| globals().update(_ns) | |
| __all__ = public_api | |