OpenEuphoria

Re: Attn: Robert (Non-Blocking Support Revisited)

• Posted by Robert Craig <rds at RapidEuphoria.com> Mar 22, 2007
• 682 views

C Bouzy wrote:
> Hello Robert,
> 
> As you know I have been pushing for non-blocking support to be added to EU for
> quite sometime. I have tried some of the suggested alternatives with no avail.
> Certain libraries/dlls I use do not work with the alternatives you and others
> suggested. I can pretty much do everything I need with EU, but non-blocking
> support is the only hurtle that I have yet to overcome. In the past I have
> been
> able to find workarounds, but I am increasingly finding it more difficult to
> find suitable alternatives. Is there any way I can persuade you to begin work
> on officially adding non-blocking support to EU? 

I haven't started on this yet.
All I was hoping to do was somehow wrap the asynchronous I/O
capabilities of the WIN32 ReadFileEx and WriteFileEx routines,
and add a couple of easy-to-use Euphoria library routines 
(in an include file). Other people could also try to do this. 
I'm not sure if any Euphoria-internal C-code is needed.
It would complement Euphoria's cooperative multitasking
capabilities if there was a way for a task to start some I/O
and then poll periodically for completion, while other tasks 
are free to run. I would also try to implement the same
functionality on Linux/FreeBSD. Another possibility is for
a call-back to occur upon I/O completion, but somehow polling
seems to fit nicer with Euphoria's multitasking.

I haven't looked at Daniel's latest SDLL yet,
though I definitely should, before starting to work on this.

In general, I think we need some time to experiment
before trying to package this stuff officially.

> Hello Jonas,
>
> One library in particular is bass. The function BASSStreamCreateURL will not
> work with TDLL.

I have no idea if what I am planning would solve this problem
for you. Maybe you can experiment by trying to somehow wrap 
ReadFileEx/WriteFileEx by yourself. It actually looks a bit more 
complicated than I imagined at first.

Regards,
   Rob Craig
   Rapid Deployment Software
   http://www.RapidEuphoria.com