pulse: move pa_rtclock_now in pulsecommon

2025-11-03 09:01:50 -05:00 · 2009-04-04 23:19:53 +03:00 · 2009-04-04 23:19:53 +03:00 · 125c528896
commit 125c528896
parent 5dcdd5e358
23 changed files with 121 additions and 39 deletions
--- a/src/pulsecore/core-rtclock.c
+++ 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 <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 <errno.h>
+
+#ifdef HAVE_SYS_PRCTL_H
+#include <sys/prctl.h>
+#endif
+
+#include <pulse/timeval.h>
+#include <pulsecore/macro.h>
+#include <pulsecore/core-error.h>
+
+#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;
+}