[vlc-devel] commit: poll(): ifndef HAVE_POLL means we don't use poll(), not that it doesn't exist. In OSX poll() is broken for sockets, so we don' t use it. Since poll is a kernel function in OSX however, the kernel implementation was used whenever we used poll(), instead of VLCs private poll() which was the intended behaviour. Renamed poll() to vlc_poll() to prevent this. (Derk-Jan Hartman )

Derk-Jan Hartman hartman at videolan.org
Thu Aug 7 01:48:37 CEST 2008

On 7 aug 2008, at 01:42, Derk-Jan Hartman wrote:
> On 6 aug 2008, at 17:16, Rémi Denis-Courmont wrote:
>> Le mercredi 6 août 2008 17:58:47 git version control, vous avez
>> écrit :
>>> vlc | branch: master | Derk-Jan Hartman <hartman at videolan.org> |
>>> Wed Aug  6
>>> 16:58:02 2008 +0200| [d934fc525f6be873a56c54dd97d0aa8f5fead910] |
>>> committer: Derk-Jan Hartman
>>> VLCs private poll() which was the
>>> intended behaviour. Renamed poll() to vlc_poll() to prevent this.
>> Oh no, it was NOT the intended behavior. The VLC poll()
>> implementation (which
>> I wrote) will _only_ work properly on Winsock. It is not intended
>> for any
>> other OS, and explicitly NOT adequate for BSD variants.
> OK i'm lost, so I reverted. Lets' start again:
> The problem is ticket http://trac.videolan.org/vlc/ticket/1824


> VLC SAP service discovery hangs indefinitely on poll() and no data is
> read EVER from any of the file descriptors. VLC also hangs and
> eventually crashes when you tried to quit it. This issue was reported
> on the forum in early May, and i confirmed it in testing on Veda with
> NBs going as far back as the original net_Select to poll() switch.
> 1: poll() on OSX is broken
> 2: poll() in vlc works only windows.
> 3: currently vlc for OSX does not have the define HAVE_POLL and as
> such uses vlc's poll()
> 4: courmisch says that the poll() problems on OSX shouldn't affect
> it's usage in vlc
> 5: pdherbemont says that poll() OSX can't use tty's and thus will
> break when used in the rc intf.
> 6: pdherbemont says he does not have the problem. he tested with
> jones. This indicates that his may be a PPC issue (probably of the
> poll() implementation)

mm, i can't count :D

> 6: if HAVE_POLL is only intended for windows, it should be in a
> windows specific check, not HAVE_POLL right?
> 7: if OSX POLL is broken, then my commit is needed, and additional
> fixes to vlc_poll() to make it non winsock specific.
> 8: What about other BSD platforms, which have a similar history of
> buggy poll implementations right ?
> Now what ?
> DJ
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