1COMEDI_GET_BUFFER_CO(3) Comedi reference COMEDI_GET_BUFFER_CO(3)
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6 comedi_get_buffer_contents - streaming buffer status
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9 #include <comedilib.h>
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11 int comedi_get_buffer_contents(comedi_t * device,
12 unsigned int subdevice);
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15 The function comedi_get_buffer_contents is used on a subdevice that has
16 a Comedi command in progress to get the number of unread bytes. For a
17 streaming input command, this is the number of bytes that can be read.
18 For a streaming output command, subtracting this from the buffer size
19 gives the space available to be written.
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22 On success, comedi_get_buffer_contents returns the number of unread
23 bytes in the buffer. On failure, -1 is returned.
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26 David Schleef <ds@schleef.org>
27 Author.
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29 Frank Mori Hess <fmhess@users.sourceforge.net>
30 Author.
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32 Herman Bruyninckx <Herman.Bruyninckx@mech.kuleuven.ac.be>
33 Author.
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35 Bernd Porr <tech@linux-usb-daq.co.uk>
36 Author.
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38 Ian Abbott <abbotti@mev.co.uk>
39 Author.
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41 Éric Piel <piel@delmic.com>
42 Author.
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45 Copyright © 1998-2003 David Schleef
46 Copyright © 2001-2003, 2005, 2008 Frank Mori Hess
47 Copyright © 2002-2003 Herman Bruyninckx
48 Copyright © 2012 Bernd Porr
49 Copyright © 2012 Ian Abbott
50 Copyright © 2012, 2015 Éric Piel
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52 This document is part of Comedilib. In the context of this document,
53 the term "source code" as defined by the license is interpreted as the
54 XML source.
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56 This library is free software; you can redistribute it and/or modify it
57 under the terms of the GNU Lesser General Public License as published
58 by the Free Software Foundation, version 2.1 of the License.
59
60 This library is distributed in the hope that it will be useful, but
61 WITHOUT ANY WARRANTY; without even the implied warranty of
62 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
63 General Public License for more details.
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65 You should have received a copy of the GNU Lesser General Public
66 License along with this library; if not, write to the Free Software
67 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
68 USA.
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73Comedi 05/11/2017 COMEDI_GET_BUFFER_CO(3)