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