# Re: \[msysGit\] Re: \[PATCH\] compat: Add another rudimentary poll() emulation

- From: Albert Dvornik \<hidden\>
- Date: 2016-06-15 22:48:52 
- List: git
- Page: https://ratatoskr.run/git/2016/06/7465700
- Thread: https://ratatoskr.run/git/2016/06/7465679/t.md

```text
On Thu, May 27, 2010 at 8:57 AM, Erik Faye-Lund
[ref] wrote:
> On Thu, May 27, 2010 at 2:36 PM, Marko Kreen [ref] wrote:
[...]
>> Hm, good catch.  Seems such compat poll() cannot be done without
>> OS-specific hacks.
>>
>
> Perhaps getrlimit() could overridden to return FD_SETSIZE for both the
> soft and hard limit when asking about RLIMIT_NOFILE? In such cases,
> anyone who passes nfds above FD_SETSIZE hasn't consulted
> RLIMIT_NOFILE, and should be outside the standard. But your point
> might have been about a limitless poll()-implementation, like the code
> you linked tried to achieve. In that context, no. I doubt it's
> possible to do in a robust fashion.

This is getting far off-topic, but I do think it's possible to do in a
robust fashion if you are willing to sacrifice some performance [i.e.
we should not consider this for Git =) ], by creating multiple fd_set
structures and only shoving up to FD_SETSIZE descriptors into each.
Cycling between the structures would cause some extra latency and a
LOT more code complexity, but it should work.

--bert
```