From 125c52889626b2ac408ecbcc8ea85575f5808e07 Mon Sep 17 00:00:00 2001 From: Marc-André Lureau Date: Sat, 4 Apr 2009 23:19:53 +0300 Subject: pulse: move pa_rtclock_now in pulsecommon --- src/pulsecore/core-rtclock.c | 152 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 152 insertions(+) create mode 100644 src/pulsecore/core-rtclock.c (limited to 'src/pulsecore/core-rtclock.c') diff --git a/src/pulsecore/core-rtclock.c b/src/pulsecore/core-rtclock.c new file mode 100644 index 00000000..0610e297 --- /dev/null +++ b/src/pulsecore/core-rtclock.c @@ -0,0 +1,152 @@ +/*** + This file is part of PulseAudio. + + Copyright 2004-2006 Lennart Poettering + Copyright 2006 Pierre Ossman 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 +#endif + +#include +#include +#include +#include + +#ifdef HAVE_SYS_PRCTL_H +#include +#endif + +#include +#include +#include + +#include "core-rtclock.h" + +pa_usec_t pa_rtclock_age(const struct timeval *tv) { + struct timeval now; + pa_assert(tv); + + return pa_timeval_diff(pa_rtclock_get(&now), tv); +} + +struct timeval *pa_rtclock_get(struct timeval *tv) { +#ifdef HAVE_CLOCK_GETTIME + struct timespec ts; + +#ifdef CLOCK_MONOTONIC + /* No locking or atomic ops for no_monotonic here */ + static pa_bool_t no_monotonic = FALSE; + + if (!no_monotonic) + if (clock_gettime(CLOCK_MONOTONIC, &ts) < 0) + no_monotonic = TRUE; + + if (no_monotonic) +#endif + pa_assert_se(clock_gettime(CLOCK_REALTIME, &ts) == 0); + + pa_assert(tv); + + tv->tv_sec = ts.tv_sec; + tv->tv_usec = ts.tv_nsec / 1000; + + return tv; + +#else /* HAVE_CLOCK_GETTIME */ + + return pa_gettimeofday(tv); + +#endif +} + +pa_bool_t pa_rtclock_hrtimer(void) { +#ifdef HAVE_CLOCK_GETTIME + 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; + +#else /* HAVE_CLOCK_GETTIME */ + + return FALSE; + +#endif +} + +#define TIMER_SLACK_NS (int) ((500 * PA_NSEC_PER_USEC)) + +void pa_rtclock_hrtimer_enable(void) { +#ifdef PR_SET_TIMERSLACK + int slack_ns; + + if ((slack_ns = prctl(PR_GET_TIMERSLACK, 0, 0, 0, 0)) < 0) { + pa_log_info("PR_GET_TIMERSLACK/PR_SET_TIMERSLACK not supported."); + return; + } + + pa_log_debug("Timer slack is set to %i us.", (int) (slack_ns/PA_NSEC_PER_USEC)); + + if (slack_ns > TIMER_SLACK_NS) { + slack_ns = TIMER_SLACK_NS; + + pa_log_debug("Setting timer slack to %i us.", (int) (slack_ns/PA_NSEC_PER_USEC)); + + if (prctl(PR_SET_TIMERSLACK, slack_ns, 0, 0, 0) < 0) { + pa_log_warn("PR_SET_TIMERSLACK failed: %s", pa_cstrerror(errno)); + return; + } + } + +#endif +} + +struct timeval* pa_rtclock_from_wallclock(struct timeval *tv) { + +#ifdef HAVE_CLOCK_GETTIME + struct timeval wc_now, rt_now; + + pa_gettimeofday(&wc_now); + pa_rtclock_get(&rt_now); + + pa_assert(tv); + + if (pa_timeval_cmp(&wc_now, tv) < 0) + pa_timeval_add(&rt_now, pa_timeval_diff(tv, &wc_now)); + else + pa_timeval_sub(&rt_now, pa_timeval_diff(&wc_now, tv)); + + *tv = rt_now; +#endif + + return tv; +} + +pa_usec_t pa_timespec_load(const struct timespec *ts) { + pa_assert(ts); + + return + (pa_usec_t) ts->tv_sec * PA_USEC_PER_SEC + + (pa_usec_t) ts->tv_nsec / PA_NSEC_PER_USEC; +} -- cgit