if there's ever time...IOCP possible?
schmorp at schmorp.de
Thu Nov 13 08:33:12 CET 2008
On Wed, Nov 12, 2008 at 01:17:46PM -0700, Roger Pack <rogerpack2005 at gmail.com> wrote:
> I wonder if it would be possible to add IOCP (to emulate event driven
> architectures) to libev.
No, it isn't - iocp's are not powerful enough to emulate the posix event
> seems to explain how.
the problem is that the famous "passing in a zero byte buffer" trick a)
isn't supported by the windows api and b) often fails in practise.
besides, performance with a medium number of file handles is likely to be
much better with select (or the new wsapoll).
with a higher number of handles, iocps would (if possible) perform better.
the job of libev is to support the posix model on windows, so programs can be
ported well, at a performance cost because of the extremely braindamaged and
the goal is to be compatible, not to have windows-specific hacks that
complicate libev user programs.
besides, there is no point in wasting ten times the amount of code in
getting marginally better performance for that platform.
> Twould be nice to have a mechanism in win32 to overcome the FD_SETSIZE
There is, it's called #define?
If you had read the libev documentation, as you were told a number of
times already, you'd know about that.
> Here's to wishing :)
I wish people would search the list archives and read the manual first.
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