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/*
Copyright (c) 2013 Red Hat, Inc. <http://www.redhat.com>
This file is part of GlusterFS.
This file is licensed to you under your choice of the GNU Lesser
General Public License, version 3 or any later version (LGPLv3 or
later), or the GNU General Public License, version 2 (GPLv2), in all
cases as published by the Free Software Foundation.
*/
#include <stdio.h>
#include <inttypes.h>
#include <time.h>
#include <sys/time.h>
#include <string.h>
#if defined GF_DARWIN_HOST_OS
#include <mach/mach_time.h>
static mach_timebase_info_data_t gf_timebase;
#endif
#include "logging.h"
#include "timespec.h"
#include "libglusterfs-messages.h"
#include "common-utils.h"
void
timespec_now(struct timespec *ts)
{
#if defined GF_LINUX_HOST_OS || defined GF_SOLARIS_HOST_OS || \
defined GF_BSD_HOST_OS
if (0 == clock_gettime(CLOCK_MONOTONIC, ts)) {
/* All good */
return;
}
/* Fall back, but there is hope in gettimeofday() syscall */
struct timeval tv;
if (0 == gettimeofday(&tv, NULL)) {
/* Again, all good */
TIMEVAL_TO_TIMESPEC(&tv, ts);
return;
}
/* If control hits here, there is surely a problem,
mainly because, as per man page too, these syscalls
shouldn't fail. Best way is to ABORT, because it is
not right */
GF_ABORT("gettimeofday() failed!!");
#elif defined GF_DARWIN_HOST_OS
uint64_t time = mach_absolute_time();
static double scaling = 0.0;
if (mach_timebase_info(&gf_timebase) != KERN_SUCCESS) {
gf_timebase.numer = 1;
gf_timebase.denom = 1;
}
if (gf_timebase.denom == 0) {
gf_timebase.numer = 1;
gf_timebase.denom = 1;
}
scaling = (double)gf_timebase.numer / (double)gf_timebase.denom;
time *= scaling;
ts->tv_sec = (time * NANO);
ts->tv_nsec = (time - (ts->tv_sec * GIGA));
#endif /* Platform verification */
}
void
timespec_adjust_delta(struct timespec *ts, struct timespec delta)
{
ts->tv_nsec = ((ts->tv_nsec + delta.tv_nsec) % 1000000000);
ts->tv_sec += ((ts->tv_nsec + delta.tv_nsec) / 1000000000);
ts->tv_sec += delta.tv_sec;
}
void
timespec_sub(const struct timespec *begin, const struct timespec *end,
struct timespec *res)
{
if (end->tv_nsec < begin->tv_nsec) {
res->tv_sec = end->tv_sec - begin->tv_sec - 1;
res->tv_nsec = end->tv_nsec + 1000000000 - begin->tv_nsec;
} else {
res->tv_sec = end->tv_sec - begin->tv_sec;
res->tv_nsec = end->tv_nsec - begin->tv_nsec;
}
}
int
timespec_cmp(const struct timespec *lhs_ts, const struct timespec *rhs_ts)
{
if (lhs_ts->tv_sec < rhs_ts->tv_sec) {
return -1;
} else if (lhs_ts->tv_sec > rhs_ts->tv_sec) {
return 1;
} else if (lhs_ts->tv_nsec < rhs_ts->tv_nsec) {
return -1;
} else if (lhs_ts->tv_nsec > rhs_ts->tv_nsec) {
return 1;
}
return 0;
}
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