[Python-Dev] Pervasive socket failures on Windows (original) (raw)

"Martin v. Löwis" martin at v.loewis.de
Fri Feb 10 21:47:26 CET 2006

Scott Dial wrote:

This begs the question then whether the check that is implemented has any relevance to any platform other than Linux. I am no portability guru, but I have to think there are other platforms where this patch will cause problems.

The patch is right on all platforms conforming to the POSIX standard. POSIX says that FD_ISSET and friends have undefined behaviour if the file descriptor is larger than FD_SETSIZE.

For platforms not conforming to the POSIX standard, the patch errs on the conservative side: it refuses to do something that POSIX says has undefined behaviour, yet may be well-defined on that platform.

Disabling this for Windows is fine with me; I also think there should be some kind of documentation that quickly shows the potential cause of the exception

Regards, Martin

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