comedi_get_buffer_read_offset - streaming buffer read offset

DavidSchleef <ds@schleef.org>
           Author.

       FrankMoriHess <fmhess@users.sourceforge.net>
           Author.

       HermanBruyninckx <Herman.Bruyninckx@mech.kuleuven.ac.be>
           Author.

       BerndPorr <tech@linux-usb-daq.co.uk>
           Author.

       IanAbbott <abbotti@mev.co.uk>
           Author.

       ÉricPiel <piel@delmic.com>
           Author.

       Copyright © 1998-2003 David Schleef
       Copyright © 2001-2003, 2005, 2008 Frank Mori Hess
       Copyright © 2002-2003 Herman Bruyninckx
       Copyright © 2012 Bernd Porr
       Copyright © 2012 Ian Abbott
       Copyright © 2012, 2015 Éric Piel

       This document is part of Comedilib. In the context of this document, the term "source code" as defined by
       the license is interpreted as the XML source.

       This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser
       General Public License as published by the Free Software Foundation, version 2.1 of the License.

       This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
       the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
       Public License for more details.

       You should have received a copy of the GNU Lesser General Public License along with this library; if not,
       write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

Comedi                                             03/04/2025                            COMEDI_GET_BUFFER_RE(3)

       The function comedi_get_buffer_read_offset is used on a subdevice that has a Comedi command in progress
       to get the current read position in the streaming buffer as an offset in bytes from the start of the
       buffer. The position will wrap around to 0 when it reaches the buffer size. This offset is only useful
       for memory mapped buffers.

       This function replaces comedi_get_buffer_offset and has the same functionality.

       comedi_get_buffer_read_offset - streaming buffer read offset

       On success, comedi_get_buffer_read_offset returns the current read position as an offset in bytes from
       the start of the buffer. On failure, -1 is returned.

#include<comedilib.h>intcomedi_get_buffer_read_offset(comedi_t*device,unsignedintsubdevice);