On Tue, 8 Aug 2006, Dave Higton wrote:

> > -----Original Message-----
> > From: Alan Stern [mailto:[EMAIL PROTECTED] 
> > Sent: 2006-Aug-08 15:30
> > To: Dave Higton
> > Cc: USB development list
> > Subject: RE: [Linux-usb-users] Linux-usb-users
> > 
> > Have you installed the most recent version of libusb?  I 
> > don't know in 
> > which release async support was added and I haven't looked at 
> > it in years, 
> > but I've heard that it's there now.
> 
> The latest one I can see is 0.1.12, but the docs that come
> with it still talk about asynchronous in the future tense.
> Do you know of a later version?  Do you know of asynchronous
> support having been added but the docs not updated?

That does look like the latest version available at sourceforge, and 
indeed it does not support asynchronous submissions.  In fact, development 
on libusb appears to have slowed to a halt.

Maybe someone else on the mailing list knows where a more advanced version 
is available.

For now, this leaves you with two choices for async I/O.  One possibility 
is what I mentioned earlier: create a second thread in your program and 
devote it to managing synchronous requests.  The other option is to use 
the lower-level usbfs API.

Alan Stern


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