[Python-Dev] test_poll fails when building python 2.3.3 on osx (original) (raw)

Bob Ippolito bob at redivi.com
Fri Jan 23 19:19:11 EST 2004

On Jan 23, 2004, at 5:47 PM, Jodok Batlogg wrote:

i'm trying to build py2.3.3 on osx (10.3) with gcc3.3 (and 3.1) but testpoll always fails.

The poll interface is emulated in OS X 10.3, the Darwin kernel doesn't actually work like that. It might be broken, but in practice that doesn't really matter because poll is very rarely used.

From the header file: This file, and the accompanying "poll.c", implement the System V poll(2) system call for BSD systems (which typically do not provide poll()). Poll() provides a method for multiplexing input and output on multiple open file descriptors; in traditional BSD systems, that capability is provided by select(). While the semantics of select() differ from those of poll(), poll() can be readily emulated in terms of select() -- which is how this function is implemented.

In short, I wouldn't worry about it. It's probably a bug on Apple's part, but I'd be surprised if it would ever cause you a real problem.
I've never seen Python code in the wild that uses select.poll() as the default I/O multiplexing mechanism (they all use select.select() instead).

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