blob: ae9c824ca416ee3a659193da9a2b585e4a5a0703 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
/*
* This file is Copyright (c) 2015 by the GPSD project
* BSD terms apply: see the file COPYING in the distribution root for details.
*/
#ifndef PPSTHREAD_H
#define PPSTHREAD_H
#include <time.h>
#ifndef TIMEDELTA_DEFINED
#define TIMEDELTA_DEFINED
struct timedelta_t {
struct timespec real;
struct timespec clock;
};
#endif /* TIMEDELTA_DEFINED */
/* use RFC 2782 PPS API */
/* this needs linux >= 2.6.34 and
* CONFIG_PPS=y
* CONFIG_PPS_DEBUG=y [optional to kernel log pulses]
* CONFIG_PPS_CLIENT_LDISC=y
*/
#if defined(HAVE_SYS_TIMEPPS_H)
// include unistd.h here as it is missing on older pps-tools releases.
// 'close' is not defined otherwise.
#include <sys/time.h>
#include <sys/timepps.h>
#endif
/* difference between timespecs in nanoseconds */
/* int is too small, avoid floats */
/* WARNING! this will overflow if x and y differ by more than a few seconds */
#define timespec_diff_ns(x, y) (long)(((x).tv_sec-(y).tv_sec)*1000000000+(x).tv_nsec-(y).tv_nsec)
struct pps_thread_t {
void *context;
int devicefd; /* device file descriptor */
char *devicename;
char *(*report_hook)(volatile struct pps_thread_t *,
struct timedelta_t *);
void (*pps_hook)(volatile struct pps_thread_t *,
struct timedelta_t *);
void (*log_hook)(volatile struct pps_thread_t *,
int errlevel, const char *fmt, ...);
void (*wrap_hook)(volatile struct pps_thread_t *);
struct timedelta_t fixin; /* real & clock time when in-band fix received */
#if defined(HAVE_SYS_TIMEPPS_H)
pps_handle_t kernelpps_handle;
#endif /* defined(HAVE_SYS_TIMEPPS_H) */
struct timedelta_t ppsout_last;
int ppsout_count;
};
#define THREAD_ERROR 0
#define THREAD_WARN 1
#define THREAD_INF 2
#define THREAD_PROG 3
#define THREAD_RAW 4
extern void pps_thread_activate(volatile struct pps_thread_t *);
extern void pps_thread_deactivate(volatile struct pps_thread_t *);
extern void pps_thread_fixin(volatile struct pps_thread_t *,
volatile struct timedelta_t *);
extern int pps_thread_ppsout(volatile struct pps_thread_t *,
volatile struct timedelta_t *);
#endif /* PPSTHREAD_H */
|
