COMEDI_GET_BUFFER_SI(3)

✨ NAME ✨

ok so like, this is comedi_get_buffer_size — the little function that tells you the streaming buffer size of a subdevice. that's it. that's the whole vibe. 💖

---

🌸 SYNOPSIS 🌸

bestie, it's literally this:

#include <comedilib.h>

int comedi_get_buffer_size(comedi_t * device, unsigned int subdevice);

two args. one int back. we love a low-maintenance king. 👑

---

🦋 DESCRIPTION 🦋

okay so here's the tea: comedi_get_buffer_size returns the size, in bytes, of the streaming buffer for the subdevice you point at with device and subdevice. that's the whole function. it just hands you a number and minds its own business. iconic behavior honestly. 💅

---

⭐ RETURN VALUE ⭐

• success — you get the size of the buffer in bytes, slay 🎀
• failure — you get -1 and nothing else, no cap 😭

---

👑 AUTHORS 👑

the literal legends who made this happen, give them their flowers fr fr:

• 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 💜

the receipts, verbatim, because we respect intellectual property in this house:

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.

okay real talk though — no warranty, no promises, it's giving "use at your own risk but make it cute" 🫶

---

that's the whole page bestie, COMEDI_GET_BUFFER_SI(3) from the Comedi reference, dated 03/20/2026 — mwah, go get your buffer sizes, ily 💖✨