mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-08 14:20:07 +00:00
146 lines
3.5 KiB
C
146 lines
3.5 KiB
C
/* This tests the barrier reset mechanism.
|
|
Copyright (C) 2004-2024 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library 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.
|
|
|
|
The GNU C Library 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 the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <errno.h>
|
|
#include <pthread.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <internaltypes.h>
|
|
|
|
|
|
static pthread_barrier_t b1;
|
|
static pthread_barrier_t b2;
|
|
|
|
|
|
#define N 20
|
|
#define ROUNDS_PER_RUN 20
|
|
#define START ((BARRIER_IN_THRESHOLD / N - ROUNDS_PER_RUN / 2) * N)
|
|
|
|
static void *
|
|
tf (void *arg)
|
|
{
|
|
int runs = 0;
|
|
|
|
while (runs++ < 30)
|
|
{
|
|
/* In each run, we execute a number of rounds and initialize the barrier
|
|
so that we will go over the reset threshold with those rounds. */
|
|
for (int rounds = 0; rounds < ROUNDS_PER_RUN; rounds++)
|
|
pthread_barrier_wait (&b1);
|
|
|
|
if (pthread_barrier_wait (&b1) == PTHREAD_BARRIER_SERIAL_THREAD)
|
|
{
|
|
pthread_barrier_destroy (&b1);
|
|
if (pthread_barrier_init (&b1, NULL, N) != 0)
|
|
{
|
|
puts ("tf: 1st barrier_init failed");
|
|
exit (1);
|
|
}
|
|
puts ("b1 reinitialized");
|
|
/* Trigger a reset. */
|
|
struct pthread_barrier *bar = (struct pthread_barrier *) &b1;
|
|
bar->in = START;
|
|
bar->out = START;
|
|
/* We deliberately don't set bar->current_round so that we also
|
|
test whether the helping for the updates of current_round
|
|
works correctly. */
|
|
}
|
|
|
|
/* Same as above, just for b2. */
|
|
for (int rounds = 0; rounds < ROUNDS_PER_RUN; rounds++)
|
|
pthread_barrier_wait (&b2);
|
|
|
|
if (pthread_barrier_wait (&b2) == PTHREAD_BARRIER_SERIAL_THREAD)
|
|
{
|
|
pthread_barrier_destroy (&b2);
|
|
if (pthread_barrier_init (&b2, NULL, N) != 0)
|
|
{
|
|
puts ("tf: 2nd barrier_init failed");
|
|
exit (1);
|
|
}
|
|
puts ("b2 reinitialized");
|
|
/* Trigger a reset. See above. */
|
|
struct pthread_barrier *bar = (struct pthread_barrier *) &b2;
|
|
bar->in = START;
|
|
bar->out = START;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
pthread_attr_t at;
|
|
int cnt;
|
|
|
|
if (pthread_attr_init (&at) != 0)
|
|
{
|
|
puts ("attr_init failed");
|
|
return 1;
|
|
}
|
|
|
|
if (pthread_attr_setstacksize (&at, 1 * 1024 * 1024) != 0)
|
|
{
|
|
puts ("attr_setstacksize failed");
|
|
return 1;
|
|
}
|
|
|
|
if (pthread_barrier_init (&b1, NULL, N) != 0)
|
|
{
|
|
puts ("1st barrier_init failed");
|
|
return 1;
|
|
}
|
|
|
|
if (pthread_barrier_init (&b2, NULL, N) != 0)
|
|
{
|
|
puts ("2nd barrier_init failed");
|
|
return 1;
|
|
}
|
|
|
|
pthread_t th[N - 1];
|
|
for (cnt = 0; cnt < N - 1; ++cnt)
|
|
if (pthread_create (&th[cnt], &at, tf, NULL) != 0)
|
|
{
|
|
puts ("pthread_create failed");
|
|
return 1;
|
|
}
|
|
|
|
if (pthread_attr_destroy (&at) != 0)
|
|
{
|
|
puts ("attr_destroy failed");
|
|
return 1;
|
|
}
|
|
|
|
tf (NULL);
|
|
|
|
for (cnt = 0; cnt < N - 1; ++cnt)
|
|
if (pthread_join (th[cnt], NULL) != 0)
|
|
{
|
|
puts ("pthread_join failed");
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define TEST_FUNCTION do_test ()
|
|
#include "../test-skeleton.c"
|