[issue14059] Implement multiprocessing.Barrier

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

> > RawValue uses ctypes, right? That's problematic for platforms which don't 
> > support ctypes.
> 
> Are there many posix systems (we care about) where ctypes doesn't
> work?

It depends what you call "caring about" :-)
But proprietary Unix C compilers generally don't mix very well with
ctypes.

> It would be fairly easy to use memoryview instead of ctypes.  (In fact
> Value/RawValue could be implemented that way when using a typecode
> instead of a ctypes type.)

That would be a good idea then. Also, not using ctypes could make code
theoretically more robust.

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