NAME

       comedi_set_buffer_size - streaming buffer size of subdevice

SYNOPSIS

       #include <comedilib.h>

       int comedi_set_buffer_size(comedi_t * device, unsigned int subdevice, unsigned int size);

DESCRIPTION

       The function comedi_set_buffer_size changes the size of the streaming buffer for the
       subdevice specified by device and subdevice. The buffer size will be set to size bytes,
       rounded up to a multiple of the virtual memory page size. The virtual memory page size can
       be determined using sysconf(_SC_PAGE_SIZE).

       This function does not require special privileges. However, it is limited to a
       (adjustable) maximum buffer size, which can be changed by a privileged user calling
       comedi_set_max_buffer_size, or running the program comedi_config.

RETURN VALUE

       On success, comedi_set_buffer_size returns the new buffer size in bytes. On failure, -1 is
       returned.

AUTHORS

       David Schleef <ds@schleef.org>
           Author.

       Frank Mori Hess <fmhess@users.sourceforge.net>
           Author.

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

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

       Ian Abbott <abbotti@mev.co.uk>
           Author.

       Éric Piel <piel@delmic.com>
           Author.

COPYRIGHT

       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.