64 lines
1.5 KiB
Python
64 lines
1.5 KiB
Python
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"""zmq device functions"""
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# Copyright (C) PyZMQ Developers
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# Distributed under the terms of the Modified BSD License.
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from ._cffi import ffi
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from ._cffi import lib as C
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from .socket import Socket
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from .utils import _retry_sys_call
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def device(device_type, frontend, backend):
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return proxy(frontend, backend)
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def proxy(frontend, backend, capture=None):
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if isinstance(capture, Socket):
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capture = capture._zmq_socket
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else:
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capture = ffi.NULL
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_retry_sys_call(C.zmq_proxy, frontend._zmq_socket, backend._zmq_socket, capture)
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def proxy_steerable(frontend, backend, capture=None, control=None):
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"""proxy_steerable(frontend, backend, capture, control)
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Start a zeromq proxy with control flow.
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.. versionadded:: libzmq-4.1
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.. versionadded:: 18.0
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Parameters
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----------
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frontend : Socket
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The Socket instance for the incoming traffic.
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backend : Socket
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The Socket instance for the outbound traffic.
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capture : Socket (optional)
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The Socket instance for capturing traffic.
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control : Socket (optional)
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The Socket instance for control flow.
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"""
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if isinstance(capture, Socket):
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capture = capture._zmq_socket
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else:
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capture = ffi.NULL
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if isinstance(control, Socket):
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control = control._zmq_socket
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else:
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control = ffi.NULL
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_retry_sys_call(
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C.zmq_proxy_steerable,
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frontend._zmq_socket,
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backend._zmq_socket,
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capture,
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control,
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)
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__all__ = ['device', 'proxy', 'proxy_steerable']
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