74 lines
2.6 KiB
Python
74 lines
2.6 KiB
Python
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"""Python bindings for 0MQ."""
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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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# load bundled libzmq, if there is one:
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def _load_libzmq():
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"""load bundled libzmq if there is one"""
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import sys, platform, os
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dlopen = hasattr(sys, 'getdlopenflags') # unix-only
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# RTLD flags are added to os in Python 3
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# get values from os because ctypes values are WRONG on pypy
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PYPY = platform.python_implementation().lower() == 'pypy'
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if dlopen:
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import ctypes
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dlflags = sys.getdlopenflags()
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# set RTLD_GLOBAL, unset RTLD_LOCAL
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flags = ctypes.RTLD_GLOBAL | dlflags
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# ctypes.RTLD_LOCAL is 0 on pypy, which is *wrong*
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flags &= ~ getattr(os, 'RTLD_LOCAL', 4)
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# pypy on darwin needs RTLD_LAZY for some reason
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if PYPY and sys.platform == 'darwin':
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flags |= getattr(os, 'RTLD_LAZY', 1)
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flags &= ~ getattr(os, 'RTLD_NOW', 2)
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sys.setdlopenflags(flags)
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try:
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from . import libzmq
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except ImportError:
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pass
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else:
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# store libzmq as zmq._libzmq for backward-compat
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globals()['_libzmq'] = libzmq
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if PYPY:
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# should already have been imported above, so reimporting is as cheap as checking
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import ctypes
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# some versions of pypy (5.3 < ? < 5.8) needs explicit CDLL load for some reason,
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# otherwise symbols won't be globally available
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# do this unconditionally because it should be harmless (?)
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ctypes.CDLL(libzmq.__file__, ctypes.RTLD_GLOBAL)
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finally:
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if dlopen:
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sys.setdlopenflags(dlflags)
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_load_libzmq()
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# zmq top-level imports
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from zmq import backend
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from zmq.backend import *
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from zmq import sugar
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from zmq.sugar import *
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def get_includes():
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"""Return a list of directories to include for linking against pyzmq with cython."""
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from os.path import join, dirname, abspath, pardir, exists
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base = dirname(__file__)
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parent = abspath(join(base, pardir))
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includes = [ parent ] + [ join(parent, base, subdir) for subdir in ('utils',) ]
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if exists(join(parent, base, 'include')):
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includes.append(join(parent, base, 'include'))
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return includes
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def get_library_dirs():
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"""Return a list of directories used to link against pyzmq's bundled libzmq."""
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from os.path import join, dirname, abspath, pardir
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base = dirname(__file__)
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parent = abspath(join(base, pardir))
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return [ join(parent, base) ]
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COPY_THRESHOLD = 65536
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__all__ = ['get_includes', 'COPY_THRESHOLD'] + sugar.__all__ + backend.__all__
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