problem comport, iocl and FIONREAD

["Arash Partow" <arashp at hotmail dot com>]

Hi all,

I'm seeing a problem with ioctl and FIONREAD, I use the
following code to check if there are any bytes in the
input buffer of a comport.
ie:

unsigned int SerialIO::getBufferSize()
{

   int bufferedBytes = 0;

   ioctl(IOPortHandle, FIONREAD, &bufferedBytes);

   if (bufferedBytes == -1)
   {

      bufferedBytes = 0;
      /* log an error */

   }

   return (unsigned int)bufferedBytes;

};


the problem is that even when there is data in the buffer
bufferedBytes has a value of zero.

Searching the net I've found an unresolved gcc bug report
on the same problem issued 2 months ago:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12722


I'm wondering
1. If any cygwin users have encountered such a problem?
2. If they have, were they able to find a solution etc..


Any help would be very much appreciated


Regards


Arash


PS: I ran the same code on solaris and openbsd, seems
to work fine...

__________________________________________________
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