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/*
* 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 */
#define PPS_MIN_FIXES 3 /* # fixes to wait for before shipping NTP time */
/*
* Set context, devicefd, and devicename at initialization time, before
* you call pps_thread_activate(). The context pointer can be used to
* pass data to the hook routines.
*
* Do not set the fix_in member or read the pps_out member directly,
* these accesses need to be mutex-locked and that is what the last
* two functions are for.
*
* The report hook is called when each PPS event is recognized. The log
* hook is called to log error and status indications from the thread.
*/
struct pps_thread_t {
void *context; /* PPS thread code leaves this alone */
int devicefd; /* device file descriptor */
char *devicename; /* device path */
char *(*report_hook)(volatile struct pps_thread_t *,
struct timedelta_t *);
void (*log_hook)(volatile struct pps_thread_t *,
int errlevel, const char *fmt, ...);
struct timedelta_t fix_in; /* real & clock time when in-band fix received */
struct timedelta_t pps_out; /* real & clock time of last PPS event */
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 */
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