[python-win32] WSAAsyncSelect

[david.briant at ubs.com]

Thx. I realise I now also need to understand the GIL and locking it and
unlocking it.

Does anyone know of any links where blocking I/O calls are demonstrated
in pure python?

I'm currently parsing the c code for _socket.pyd and reading up on
Py_BEGIN_ALLOW_THREADS and Py_END_ALLOW_THREADS. My goal is basically to
produce a high performance socket that I can use with a Windows UI
(wxpython) - so was thinking of calling ws2_32.dll but it looks like I
might need to be a bit more careful.

Any comments / pointers / help appreciated.

David



-----Original Message-----
From: python-win32-bounces+david.briant=ubs.com at python.org
[mailto:python-win32-bounces+david.briant=ubs.com at python.org] On Behalf
Of Tim Roberts
Sent: Wed 5-Jan-2011 22:36
To: Python-Win32 List
Subject: Re: [python-win32] WSAAsyncSelect

david.briant at ubs.com wrote:
>
> I'm looking for a little help on using WSAAsyncSelect via ctypes.I
> imagine this has been asked before but I couldn't figure out how to
> search the archives (and trawling through them randomly didn't really
> help).
>
> ...Would it be something likethe following?
>
> winsock = ctypes.windll.ws2_32
>
> WM_MY_SOCKET_MESSAGE= WM_USER + 1
>
> ...
>
> s =12345
>
> hWnd = 1234
>
> wMsg = WM_MY_SOCKET_MESSAGE
>
> lEvent =FD_READ|FD_WRITE|FD_ACCEPT|FD_CONNECT|FD_CLOSE
>
> socketErrorOrZero = winsock.WSAAsyncSelect(s, hWnd, wMsg, lEvent)
>

Yes, indeed.  I think that sock.socket.fileno should get you the socket
handle for the first parameter.

-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.

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