80 lines
1.9 KiB
Python
80 lines
1.9 KiB
Python
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# coding: utf-8
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"""zmq Context class"""
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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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import weakref
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from ._cffi import C, ffi
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from .constants import EINVAL, IO_THREADS, LINGER
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from zmq.error import ZMQError, InterruptedSystemCall, _check_rc
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class Context(object):
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_zmq_ctx = None
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_iothreads = None
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_closed = None
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_shadow = False
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def __init__(self, io_threads=1, shadow=None):
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if shadow:
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self._zmq_ctx = ffi.cast("void *", shadow)
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self._shadow = True
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else:
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self._shadow = False
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if not io_threads >= 0:
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raise ZMQError(EINVAL)
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self._zmq_ctx = C.zmq_ctx_new()
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if self._zmq_ctx == ffi.NULL:
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raise ZMQError(C.zmq_errno())
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if not shadow:
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C.zmq_ctx_set(self._zmq_ctx, IO_THREADS, io_threads)
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self._closed = False
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@property
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def underlying(self):
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"""The address of the underlying libzmq context"""
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return int(ffi.cast('size_t', self._zmq_ctx))
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@property
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def closed(self):
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return self._closed
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def set(self, option, value):
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"""set a context option
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see zmq_ctx_set
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"""
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rc = C.zmq_ctx_set(self._zmq_ctx, option, value)
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_check_rc(rc)
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def get(self, option):
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"""get context option
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see zmq_ctx_get
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"""
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rc = C.zmq_ctx_get(self._zmq_ctx, option)
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_check_rc(rc)
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return rc
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def term(self):
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if self.closed:
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return
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rc = C.zmq_ctx_destroy(self._zmq_ctx)
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try:
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_check_rc(rc)
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except InterruptedSystemCall:
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# ignore interrupted term
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# see PEP 475 notes about close & EINTR for why
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pass
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self._zmq_ctx = None
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self._closed = True
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__all__ = ['Context']
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