Clock synchronization estimator implementation. More...

#include "nilorea/n_clock_sync.h"
#include "nilorea/n_log.h"
#include "nilorea/n_common.h"
#include <string.h>
#include <stdlib.h>

Include dependency graph for n_clock_sync.c:

Functions
static int	cmp_double (const void a, const void b)
	comparison function for qsort on doubles

static double	median_of (const double *samples, int count)
	compute the median of an array of doubles

void	n_clock_sync_delete (N_CLOCK_SYNC **cs)
	free a clock sync estimator

void	n_clock_sync_mark_sent (N_CLOCK_SYNC *cs, double local_now)
	mark that a sync request was just sent

N_CLOCK_SYNC *	n_clock_sync_new (void)
	allocate and initialize a new clock sync estimator

int	n_clock_sync_process_response (N_CLOCK_SYNC *cs, double client_send_time, double server_time, double local_now)
	record a sync response: client_send_time is the local time the request was sent, server_time is the server's timestamp from the response, local_now is the current local time when the response was received.

double	n_clock_sync_server_time (const N_CLOCK_SYNC *cs, double local_now)
	get estimated server time given a local time value

int	n_clock_sync_should_send (const N_CLOCK_SYNC *cs, double local_now)
	check if it's time to send a new sync request (returns TRUE/FALSE)

Detailed Description

Clock synchronization estimator implementation.

Definition in file n_clock_sync.c.

Functions