/*
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* Analogy for Linux, context structure / macros declarations
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*
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* Copyright (C) 1997-2000 David A. Schleef <ds@schleef.org>
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* Copyright (C) 2008 Alexis Berlemont <alexis.berlemont@free.fr>
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*
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* Xenomai is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* Xenomai is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Xenomai; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef _COBALT_RTDM_ANALOGY_CONTEXT_H
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#define _COBALT_RTDM_ANALOGY_CONTEXT_H
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#include <rtdm/driver.h>
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struct a4l_device;
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struct a4l_buffer;
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struct a4l_device_context {
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/* The adequate device pointer
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(retrieved thanks to minor at open time) */
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struct a4l_device *dev;
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/* The buffer structure contains everything to transfer data
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from asynchronous acquisition operations on a specific
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subdevice */
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struct a4l_buffer *buffer;
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};
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static inline int a4l_get_minor(struct a4l_device_context *cxt)
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{
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/* Get a pointer on the container structure */
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struct rtdm_fd *fd = rtdm_private_to_fd(cxt);
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/* Get the minor index */
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return rtdm_fd_minor(fd);
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}
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#endif /* !_COBALT_RTDM_ANALOGY_CONTEXT_H */
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