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/* nbdkit
* Copyright Red Hat
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* * Neither the name of Red Hat nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <pthread.h>
#if !defined(HAVE_STDATOMIC_H) || !defined(_POSIX_BARRIERS) || \
defined(__APPLE__)
/* Skip the test if no <stdatomic.h> or pthread_barrier_t or on macOS
* which defines _POSIX_BARRIERS but doesn't actually have them.
*/
int
main (void)
{
fprintf (stderr,
"SKIP: no <stdatomic.h> or pthread_barrier_t on this platform\n");
exit (77);
}
#else
#include <stdatomic.h>
#include <errno.h>
#undef NDEBUG /* Keep test strong even for nbdkit built without assertions */
#include <assert.h>
#include "once.h"
#define NR_THREADS 8
static volatile _Atomic unsigned count1 = 0, count2 = 0,
count3 = 0, count4 = 0;
static pthread_barrier_t barrier;
static void * __attribute__((noreturn))
start_thread (void *idxp)
{
//int idx = * (int*) idxp;
pthread_barrier_wait (&barrier);
for (;;) {
ONCE (count1++);
ONCE (count2++);
ONCE (count3++);
ONCE (count4++);
}
}
int
main (void)
{
int i, err;
pthread_t th[NR_THREADS];
int idx[NR_THREADS];
err = pthread_barrier_init (&barrier, NULL, NR_THREADS);
if (err != 0) {
errno = err;
perror ("pthread_barrier_init");
exit (EXIT_FAILURE);
}
for (i = 0; i < NR_THREADS; ++i) {
idx[i] = i;
err = pthread_create (&th[i], NULL, start_thread, &idx[i]);
if (err != 0) {
errno = err;
perror ("pthread_create");
exit (EXIT_FAILURE);
}
}
do {
sleep (1);
} while (count1 + count2 + count3 + count4 < 4);
for (i = 0; i < NR_THREADS; ++i) {
pthread_cancel (th[i]);
}
pthread_barrier_destroy (&barrier);
if (count1 != 1 || count2 != 1 || count3 != 1 || count4 != 1) {
fprintf (stderr, "FAIL: counts incremented to %u %u %u %u "
"(expected 1 1 1 1)\n", count1, count2, count3, count4);
exit (EXIT_FAILURE);
}
exit (EXIT_SUCCESS);
}
#endif
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