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/***
This file is part of PulseAudio.
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, 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 <pthread.h>
#include <pulsecore/thread.h>
#include <pulsecore/mutex.h>
#include <pulsecore/once.h>
#include <pulsecore/log.h>
#include <pulsecore/core-util.h>
#include <pulsecore/core-error.h>
#include <pulsecore/atomic.h>
#include <pulse/xmalloc.h>
static pa_once once = PA_ONCE_INIT;
static volatile unsigned n_run = 0;
static const char * volatile ran_by = NULL;
static pthread_barrier_t barrier;
static unsigned n_cpu;
#define N_ITERATIONS 500
#define N_THREADS 100
static void once_func(void) {
n_run++;
ran_by = (const char*) pa_thread_get_data(pa_thread_self());
}
static void thread_func(void *data) {
int r;
#ifdef HAVE_PTHREAD_SETAFFINITY_NP
static pa_atomic_t i_cpu = PA_ATOMIC_INIT(0);
cpu_set_t mask;
CPU_ZERO(&mask);
CPU_SET((size_t) (pa_atomic_inc(&i_cpu) % n_cpu), &mask);
pa_assert_se(pthread_setaffinity_np(pthread_self(), sizeof(mask), &mask) == 0);
#endif
/* pa_log("started up: %s", data); */
r = pthread_barrier_wait(&barrier);
pa_assert(r == 0 || r == PTHREAD_BARRIER_SERIAL_THREAD);
pa_run_once(&once, once_func);
}
int main(int argc, char *argv[]) {
unsigned n, i;
n_cpu = pa_ncpus();
for (n = 0; n < N_ITERATIONS; n++) {
pa_thread* threads[N_THREADS];
pa_assert_se(pthread_barrier_init(&barrier, NULL, N_THREADS) == 0);
/* Yes, kinda ugly */
pa_zero(once);
for (i = 0; i < N_THREADS; i++)
threads[i] = pa_thread_new("once", thread_func, pa_sprintf_malloc("Thread #%i", i+1));
for (i = 0; i < N_THREADS; i++)
pa_thread_join(threads[i]);
pa_assert(n_run == 1);
pa_log("ran by %s", ran_by);
for (i = 0; i < N_THREADS; i++) {
pa_xfree(pa_thread_get_data(threads[i]));
pa_thread_free(threads[i]);
}
n_run = 0;
ran_by = NULL;
pa_assert_se(pthread_barrier_destroy(&barrier) == 0);
}
return 0;
}
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