The C and C++ Include Header Files

/usr/include/linux/iio/events.h


$ cat -n /usr/include/linux/iio/events.h

     1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
     2	/* The industrial I/O - event passing to userspace
     3	 *
     4	 * Copyright (c) 2008-2011 Jonathan Cameron
     5	 *
     6	 * This program is free software; you can redistribute it and/or modify it
     7	 * under the terms of the GNU General Public License version 2 as published by
     8	 * the Free Software Foundation.
     9	 */
    10	#ifndef _IIO_EVENTS_H_
    11	#define _IIO_EVENTS_H_
    12	
    13	#include <linux/ioctl.h>
    14	#include <linux/types.h>
    15	
    16	/**
    17	 * struct iio_event_data - The actual event being pushed to userspace
    18	 * @id:		event identifier
    19	 * @timestamp:	best estimate of time of event occurrence (often from
    20	 *		the interrupt handler)
    21	 */
    22	struct iio_event_data {
    23		__u64	id;
    24		__s64	timestamp;
    25	};
    26	
    27	#define IIO_GET_EVENT_FD_IOCTL _IOR('i', 0x90, int)
    28	
    29	#define IIO_EVENT_CODE_EXTRACT_TYPE(mask) ((mask >> 56) & 0xFF)
    30	
    31	#define IIO_EVENT_CODE_EXTRACT_DIR(mask) ((mask >> 48) & 0x7F)
    32	
    33	#define IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(mask) ((mask >> 32) & 0xFF)
    34	
    35	/* Event code number extraction depends on which type of event we have.
    36	 * Perhaps review this function in the future*/
    37	#define IIO_EVENT_CODE_EXTRACT_CHAN(mask) ((__s16)(mask & 0xFFFF))
    38	#define IIO_EVENT_CODE_EXTRACT_CHAN2(mask) ((__s16)(((mask) >> 16) & 0xFFFF))
    39	
    40	#define IIO_EVENT_CODE_EXTRACT_MODIFIER(mask) ((mask >> 40) & 0xFF)
    41	#define IIO_EVENT_CODE_EXTRACT_DIFF(mask) (((mask) >> 55) & 0x1)
    42	
    43	#endif /* _IIO_EVENTS_H_ */