[Python-Dev] [Python-checkins] cpython: Issue #12981: rewrite multiprocessing_{sendfd, recvfd} in Python. (original) (raw)

Charles-François Natali neologix at free.fr
Mon Sep 26 08:48:06 CEST 2011

On Sun, Sep 25, 2011 at 4:04 AM, charles-francois.natali <python-checkins at python.org> wrote:

+if not(sys.platform == 'win32' or (hasattr(socket, 'CMSGLEN') and +                                   hasattr(socket, 'SCMRIGHTS'))): raise ImportError('pickling of connections not supported') I'm pretty sure the functionality checks for CMSGLEN and SCMRIGHTS mean the platform check for Windows is now redundant.

I'm not sure I understand what you mean. FD passing is supported on Unix with sendmsg/SCM_RIGHTS, and on Windows using whatever Windows uses for that purpose (see http://hg.python.org/cpython/file/2b47f0146639/Lib/multiprocessing/reduction.py#l63). If we remove the check for Windows, an ImportError will be raised systematically, unless you suggest that Windows does support sendmsg/SCM_RIGHTS (I somehow doubt Windows supports Unix domain sockets, but I don't know Windows at all).

cf

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