1COMEDI_SET_BUFFER_SI(3) Comedi reference COMEDI_SET_BUFFER_SI(3)
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6 comedi_set_buffer_size - streaming buffer size of subdevice
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9 #include <comedilib.h>
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11 int comedi_set_buffer_size(comedi_t * device, unsigned int subdevice,
12 unsigned int size);
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15 The function comedi_set_buffer_size changes the size of the streaming
16 buffer for the subdevice specified by device and subdevice. The buffer
17 size will be set to size bytes, rounded up to a multiple of the virtual
18 memory page size. The virtual memory page size can be determined using
19 sysconf(_SC_PAGE_SIZE).
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21 This function does not require special privileges. However, it is
22 limited to a (adjustable) maximum buffer size, which can be changed by
23 a privileged user calling comedi_set_max_buffer_size, or running the
24 program comedi_config.
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27 On success, comedi_set_buffer_size returns the new buffer size in
28 bytes. On failure, -1 is returned.
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31 David Schleef <ds@schleef.org>
32 Author.
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34 Frank Mori Hess <fmhess@users.sourceforge.net>
35 Author.
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37 Herman Bruyninckx <Herman.Bruyninckx@mech.kuleuven.ac.be>
38 Author.
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40 Bernd Porr <tech@linux-usb-daq.co.uk>
41 Author.
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43 Ian Abbott <abbotti@mev.co.uk>
44 Author.
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46 Éric Piel <piel@delmic.com>
47 Author.
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50 Copyright © 1998-2003 David Schleef
51 Copyright © 2001-2003, 2005, 2008 Frank Mori Hess
52 Copyright © 2002-2003 Herman Bruyninckx
53 Copyright © 2012 Bernd Porr
54 Copyright © 2012 Ian Abbott
55 Copyright © 2012, 2015 Éric Piel
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57 This document is part of Comedilib. In the context of this document,
58 the term "source code" as defined by the license is interpreted as the
59 XML source.
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61 This library is free software; you can redistribute it and/or modify it
62 under the terms of the GNU Lesser General Public License as published
63 by the Free Software Foundation, version 2.1 of the License.
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65 This library is distributed in the hope that it will be useful, but
66 WITHOUT ANY WARRANTY; without even the implied warranty of
67 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
68 General Public License for more details.
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70 You should have received a copy of the GNU Lesser General Public
71 License along with this library; if not, write to the Free Software
72 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
73 USA.
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78Comedi 05/11/2017 COMEDI_SET_BUFFER_SI(3)