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04277e02d7
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146 lines
3.5 KiB
C
146 lines
3.5 KiB
C
/* This tests the barrier reset mechanism.
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Copyright (C) 2004-2019 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <pthread.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <internaltypes.h>
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static pthread_barrier_t b1;
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static pthread_barrier_t b2;
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#define N 20
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#define ROUNDS_PER_RUN 20
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#define START ((BARRIER_IN_THRESHOLD / N - ROUNDS_PER_RUN / 2) * N)
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static void *
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tf (void *arg)
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{
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int runs = 0;
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while (runs++ < 30)
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{
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/* In each run, we execute a number of rounds and initialize the barrier
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so that we will go over the reset threshold with those rounds. */
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for (int rounds = 0; rounds < ROUNDS_PER_RUN; rounds++)
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pthread_barrier_wait (&b1);
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if (pthread_barrier_wait (&b1) == PTHREAD_BARRIER_SERIAL_THREAD)
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{
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pthread_barrier_destroy (&b1);
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if (pthread_barrier_init (&b1, NULL, N) != 0)
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{
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puts ("tf: 1st barrier_init failed");
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exit (1);
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}
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puts ("b1 reinitialized");
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/* Trigger a reset. */
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struct pthread_barrier *bar = (struct pthread_barrier *) &b1;
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bar->in = START;
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bar->out = START;
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/* We deliberately don't set bar->current_round so that we also
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test whether the helping for the updates of current_round
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works correctly. */
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}
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/* Same as above, just for b2. */
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for (int rounds = 0; rounds < ROUNDS_PER_RUN; rounds++)
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pthread_barrier_wait (&b2);
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if (pthread_barrier_wait (&b2) == PTHREAD_BARRIER_SERIAL_THREAD)
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{
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pthread_barrier_destroy (&b2);
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if (pthread_barrier_init (&b2, NULL, N) != 0)
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{
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puts ("tf: 2nd barrier_init failed");
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exit (1);
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}
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puts ("b2 reinitialized");
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/* Trigger a reset. See above. */
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struct pthread_barrier *bar = (struct pthread_barrier *) &b2;
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bar->in = START;
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bar->out = START;
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}
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}
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return NULL;
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}
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static int
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do_test (void)
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{
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pthread_attr_t at;
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int cnt;
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if (pthread_attr_init (&at) != 0)
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{
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puts ("attr_init failed");
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return 1;
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}
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if (pthread_attr_setstacksize (&at, 1 * 1024 * 1024) != 0)
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{
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puts ("attr_setstacksize failed");
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return 1;
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}
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if (pthread_barrier_init (&b1, NULL, N) != 0)
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{
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puts ("1st barrier_init failed");
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return 1;
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}
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if (pthread_barrier_init (&b2, NULL, N) != 0)
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{
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puts ("2nd barrier_init failed");
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return 1;
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}
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pthread_t th[N - 1];
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for (cnt = 0; cnt < N - 1; ++cnt)
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if (pthread_create (&th[cnt], &at, tf, NULL) != 0)
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{
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puts ("pthread_create failed");
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return 1;
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}
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if (pthread_attr_destroy (&at) != 0)
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{
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puts ("attr_destroy failed");
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return 1;
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}
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tf (NULL);
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for (cnt = 0; cnt < N - 1; ++cnt)
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if (pthread_join (th[cnt], NULL) != 0)
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{
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puts ("pthread_join failed");
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return 1;
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}
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return 0;
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}
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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