Re: [Libusb-win32-devel] win-libusb async read

[Stephan M. <ste...@we...>]

You are right. This function had a small bug that I fixed some
weeks ago. The new version is in already the CVS.

See 
http://libusb-win32.cvs.sourceforge.net/libusb-win32/libusb/src/windows.c?revision=1.44&view=markup



> Stephan,
> 
> in usb_submit_async
> 
>    if(!DeviceIoControl(c->dev->impl_info,
>                       c->control_code,
>                       &c->req, sizeof(libusb_request),
>                       c->bytes,
>                       c->size, &ret, &c->ol))
>     {
>       if(GetLastError() != ERROR_IO_PENDING)
>         {
>           usb_error("usb_submit_async: submitting request failed, "
>                     "win error: %s", usb_win_error_to_string());
>            return -usb_win_error_to_errno();
>         }
>     }
> 
>   return ret;
> 
> 
> 
> ret has the bytes_read. however, the value got returned before the value is
> updated. I think usb_submit_async should take a parameter in as a
> &bytes_read.
> 
> -Andrew
> 
> 
> ----- Original Message ----- 
> From: "Stephan Meyer" <ste...@we...>
> To: <lib...@li...>; "Andrew Xiang"
> <xi...@gr...>
> Sent: Monday, June 19, 2006 12:44 PM
> Subject: Re: [Libusb-win32-devel] win-libusb async read
> 
> 
> >
> > See
> >
> > http://sourceforge.net/mailarchive/message.php?msg_id=10083829
> >
> >
> >
> > > I got the simple bulk write/read to work. However, I would like to have
> a
> > > thread waiting on the read all the time and process the read data
> > > independent of the write. How would I implement async read using the
> libusb?
> > > anyone has an example?
> > >
> > > thanks
> > > Andrew
> > >
> > >
> > >
> > > _______________________________________________
> > > Libusb-win32-devel mailing list
> > > Lib...@li...
> > > https://lists.sourceforge.net/lists/listinfo/libusb-win32-devel
> >
> >
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> 
> 
> 
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