mirror of
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117 lines
2.7 KiB
C
117 lines
2.7 KiB
C
/***
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This file is part of PulseAudio.
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Copyright 2004-2006 Lennart Poettering
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Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with PulseAudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stddef.h>
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#include <time.h>
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#include <sys/time.h>
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#include <pulse/timeval.h>
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#include <pulsecore/macro.h>
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#include "rtclock.h"
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pa_usec_t pa_rtclock_age(const struct timeval *tv) {
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struct timeval now;
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pa_assert(tv);
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return pa_timeval_diff(pa_rtclock_get(&now), tv);
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}
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struct timeval *pa_rtclock_get(struct timeval *tv) {
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#ifdef HAVE_CLOCK_GETTIME
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struct timespec ts;
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#ifdef CLOCK_MONOTONIC
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/* No locking or atomic ops for no_monotonic here */
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static pa_bool_t no_monotonic = FALSE;
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if (!no_monotonic)
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if (clock_gettime(CLOCK_MONOTONIC, &ts) < 0)
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no_monotonic = TRUE;
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if (no_monotonic)
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#endif
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pa_assert_se(clock_gettime(CLOCK_REALTIME, &ts) == 0);
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pa_assert(tv);
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tv->tv_sec = ts.tv_sec;
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tv->tv_usec = ts.tv_nsec / 1000;
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return tv;
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#else /* HAVE_CLOCK_GETTIME */
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return pa_gettimeofday(tv);
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#endif
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}
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pa_bool_t pa_rtclock_hrtimer(void) {
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#ifdef HAVE_CLOCK_GETTIME
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struct timespec ts;
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#ifdef CLOCK_MONOTONIC
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if (clock_getres(CLOCK_MONOTONIC, &ts) >= 0)
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return ts.tv_sec == 0 && ts.tv_nsec <= PA_HRTIMER_THRESHOLD_USEC*1000;
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#endif
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pa_assert_se(clock_getres(CLOCK_REALTIME, &ts) == 0);
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return ts.tv_sec == 0 && ts.tv_nsec <= PA_HRTIMER_THRESHOLD_USEC*1000;
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#else /* HAVE_CLOCK_GETTIME */
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return FALSE;
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#endif
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}
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pa_usec_t pa_rtclock_usec(void) {
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struct timeval tv;
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return pa_timeval_load(pa_rtclock_get(&tv));
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}
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struct timeval* pa_rtclock_from_wallclock(struct timeval *tv) {
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#ifdef HAVE_CLOCK_GETTIME
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struct timeval wc_now, rt_now;
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pa_gettimeofday(&wc_now);
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pa_rtclock_get(&rt_now);
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pa_assert(tv);
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if (pa_timeval_cmp(&wc_now, tv) < 0)
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pa_timeval_add(&rt_now, pa_timeval_diff(tv, &wc_now));
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else
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pa_timeval_sub(&rt_now, pa_timeval_diff(&wc_now, tv));
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*tv = rt_now;
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#endif
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return tv;
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}
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