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/***
This file is part of PulseAudio.
Copyright 2009 Lennart Poettering
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
General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <pulse/rtclock.h>
#include <pulsecore/log.h>
#include <pulsecore/mutex.h>
#include "ratelimit.h"
static pa_static_mutex mutex = PA_STATIC_MUTEX_INIT;
/* Modelled after Linux' lib/ratelimit.c by Dave Young
* <hidave.darkstar@gmail.com>, which is licensed GPLv2. */
bool pa_ratelimit_test(pa_ratelimit *r, pa_log_level_t t) {
pa_usec_t now;
pa_mutex *m;
now = pa_rtclock_now();
m = pa_static_mutex_get(&mutex, false, false);
pa_mutex_lock(m);
pa_assert(r);
pa_assert(r->interval > 0);
pa_assert(r->burst > 0);
if (r->begin <= 0 ||
r->begin + r->interval < now) {
if (r->n_missed > 0)
pa_logl(t, "%u events suppressed", r->n_missed);
r->begin = now;
/* Reset counters */
r->n_printed = 0;
r->n_missed = 0;
goto good;
}
if (r->n_printed <= r->burst)
goto good;
r->n_missed++;
pa_mutex_unlock(m);
return false;
good:
r->n_printed++;
pa_mutex_unlock(m);
return true;
}
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