You're welcome to send a patch and your tone is fine, but ...
1. Stuart is right, it's easy, just put the function in the rtl_fifos code
2. I hate adding functions so my question is always "why do you have to have
it"?
On Fri, Sep 28, 2001 at 04:21:45PM -0400, Calin A. Culianu wrote:
>
> I realize the tone of my previous this email seems impatient.. it isn't.
> Actually if you guys would honor me with your approval, I can gladly
> submit a patch that defines an interface for my proposed solution (a)
> below, or one that moves the struct definition of struct rtl_fifo_struct
> over to the more public 'rtl_fifo.h' header file. (Since the kernel symbol
> rtl_fifos is already exported).
>
>
> Please allow me to be an rt-linux developer!! :)
>
> -Calin
>
> ---------- Forwarded message ----------
> Date: Fri, 28 Sep 2001 15:35:38 -0400 (EDT)
> From: Calin A. Culianu <[EMAIL PROTECTED]>
> To: [EMAIL PROTECTED]
> Cc: rtl <[EMAIL PROTECTED]>
> Subject: RE: [rtl] number of elements in a fifo
>
> Well, in kernel mode there's no way to tell how full a fifo is (as of rtl
> 3.1)!
>
> Actually, that macro only occurs in rtl_fifo.c, and furthermore, the
> exported kernel symbol "rtl_fifos" that the macro really uses is of
> type struct rt_fifo_struct, which is a private type inside rtl_fifo.c!
>
> Why is kernel symbol 'rtl_fifos' exported when its type is private?
> It aggravates me!!
>
> Can someone on the rt-linux dev team either kindly:
>
> a) create a public interface to find out the size and/or the bytes free in
> an rtf (this is trivial, just make a function that returns
> rtl_fifos[minor].bufsize, rtl_fifos[minor].len etc).
>
> OR
>
> b) make struct rtl_fifo_struct a public struct???? (since the array of
> fifos is exported into the kernel symbol table anyway).
>
> -Calin
>
> On Fri, 21 Sep 2001, stuart warren wrote:
>
> > To read how full the fifo is from userspace...
> >
> > int bytes_in_fifo;
> > ioctl(rtfifo_fd, FIONREAD, &bytes_in_fifo);
> >
> > In the kernel you can use...
> >
> > bytes_in_fifo = RTF_LEN(fifo_number);
> >
> > Cheers,
> > Stuart
> >
> > -----Original Message-----
> > From: fred august [mailto:[EMAIL PROTECTED]]
> > Sent: Thursday, 20 September 2001 6:00
> > To: rtl
> > Subject: [rtl] number of elements in a fifo
> >
> >
> > Hi,
> > is there a simple way to know how many elements
> > are in a FIFO? This should be in RT, or almost, for a
> > FIFO between a RT thread and a user space one. I need
> > this information in order to dump some of the elements
> > if the FIFO is too full.
> >
> > thanks
> >
> > f
> >
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