[gstreamer-bugs] [Bug 515312] [RFC] Make networking elements work on windows

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gstreamer (core) | Ver: HEAD CVS




------- Comment #5 from Damien Lespiau  2008-02-11 23:23 UTC -------
Unfortunately, this code (bug #505417) won't work as is on Windows :

- select() only works on socket descriptors, so if you give, say, a pipe
descriptor to select(), it will exit with SOCKET_ERROR as return value and
WSAGetLastError() will give WSAENOTSOCK.

- What can be done without too much work: emulate socketpair() on windows by
creating 2 sockets on the loopback device, but still, gst_poll_add_fd() will
only work with sockets (as long as select will remain the heart of gst_poll on
windows).

- Option #2: try to get WaitForMultipleObjects() to work, but I never saw any
serious piece of code using it without resorting to launching a bunch of
threads waiting for a class of descriptors and I'm probably the wrong guy to
try this as my windows programming skills are not that high.

- Still, some of the above patch is needed:
* define socklen_t for windows
* inet_aton(), socketpair() replacement
* handle WSAStartup()/WSACleanup()
* #define WINVER 0x0501 to use getaddrinfo() and freeaddrinfo()
* wrappers around functions are still needed to provided BSD-like behaviour to
networking code (eg. open() returns INVALID_SOCKET on error), setting errno as
needed.

So what do you think ? should I try to get bug #505417 code to work on windows
while providing a thin layer to make the remaining networking code work too ?
Is it ok if the first GstPoll code on windows only works on sockets ?


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