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/* $Id$ */
/***
This file is part of PulseAudio.
Copyright 2004-2006 Lennart Poettering
Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
PulseAudio is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with PulseAudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stddef.h>
#include <time.h>
#include <sys/time.h>
#include <pulse/timeval.h>
#include <pulsecore/macro.h>
#include "rtclock.h"
struct timespec *pa_timespec_store(struct timespec *a, pa_usec_t u) {
pa_assert(a);
a->tv_sec = u / PA_USEC_PER_SEC;
u -= (pa_usec_t) a->tv_sec * PA_USEC_PER_SEC;
a->tv_nsec = u * 1000;
return a;
}
struct timespec *pa_timespec_reset(struct timespec *a) {
pa_assert(a);
a->tv_sec = a->tv_nsec = 0;
return a;
}
pa_usec_t pa_timespec_load(struct timespec *ts) {
pa_assert(ts);
return (pa_usec_t) ts->tv_sec * PA_USEC_PER_SEC + (pa_usec_t) (ts->tv_nsec / 1000);
}
pa_usec_t pa_timespec_diff(const struct timespec *a, const struct timespec *b) {
pa_usec_t r;
pa_assert(a);
pa_assert(b);
/* Check which whan is the earlier time and swap the two arguments if required. */
if (pa_timespec_cmp(a, b) < 0) {
const struct timespec *c;
c = a;
a = b;
b = c;
}
/* Calculate the second difference*/
r = ((pa_usec_t) a->tv_sec - b->tv_sec) * PA_USEC_PER_SEC;
/* Calculate the microsecond difference */
if (a->tv_nsec > b->tv_nsec)
r += (pa_usec_t) ((a->tv_nsec - b->tv_nsec) / 1000);
else if (a->tv_nsec < b->tv_nsec)
r -= (pa_usec_t) ((b->tv_nsec - a->tv_nsec) / 1000);
return r;
}
int pa_timespec_cmp(const struct timespec *a, const struct timespec *b) {
pa_assert(a);
pa_assert(b);
if (a->tv_sec < b->tv_sec)
return -1;
if (a->tv_sec > b->tv_sec)
return 1;
if (a->tv_nsec < b->tv_nsec)
return -1;
if (a->tv_nsec > b->tv_nsec)
return 1;
return 0;
}
struct timespec* pa_timespec_add(struct timespec *ts, pa_usec_t v) {
unsigned long secs;
pa_assert(ts);
secs = (unsigned long) (v/PA_USEC_PER_SEC);
ts->tv_sec += secs;
v -= ((pa_usec_t) secs) * PA_USEC_PER_SEC;
ts->tv_nsec += (long) (v*1000);
/* Normalize */
while (ts->tv_nsec >= PA_NSEC_PER_SEC) {
ts->tv_sec++;
ts->tv_nsec -= PA_NSEC_PER_SEC;
}
return ts;
}
pa_usec_t pa_rtclock_age(const struct timespec *ts) {
struct timespec now;
pa_assert(ts);
return pa_timespec_diff(pa_rtclock_get(&now), ts);
}
struct timespec *pa_rtclock_get(struct timespec *ts) {
static int no_monotonic = 0;
/* No locking or atomic ops for no_monotonic here */
pa_assert(ts);
if (!no_monotonic) {
#ifdef CLOCK_MONOTONIC
if (clock_gettime(CLOCK_MONOTONIC, ts) >= 0)
return ts;
#endif
no_monotonic = 1;
}
pa_assert_se(clock_gettime(CLOCK_REALTIME, ts) == 0);
return ts;
}
int pa_rtclock_hrtimer(void) {
struct timespec ts;
#ifdef CLOCK_MONOTONIC
if (clock_getres(CLOCK_MONOTONIC, &ts) >= 0)
return ts.tv_sec == 0 && ts.tv_nsec <= PA_HRTIMER_THRESHOLD_USEC*1000;
#endif
pa_assert_se(clock_getres(CLOCK_REALTIME, &ts) == 0);
return ts.tv_sec == 0 && ts.tv_nsec <= PA_HRTIMER_THRESHOLD_USEC*1000;
}
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