121 lines
2.7 KiB
C
121 lines
2.7 KiB
C
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/* Copyright (C) 2004-2022 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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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <limits.h>
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#include <fcntl.h>
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#include <pthread.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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pthread_cond_t cv = PTHREAD_COND_INITIALIZER;
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pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
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bool exiting;
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int fd, spins, nn;
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enum { count = 8 }; /* Number of worker threads. */
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void *
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tf (void *id)
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{
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pthread_mutex_lock (&lock);
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if ((long) id == 0)
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{
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while (!exiting)
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{
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if ((spins++ % 1000) == 0)
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write (fd, ".", 1);
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pthread_mutex_unlock (&lock);
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pthread_mutex_lock (&lock);
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int njobs = rand () % (count + 1);
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nn = njobs;
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if ((rand () % 30) == 0)
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pthread_cond_broadcast (&cv);
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else
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while (njobs--)
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pthread_cond_signal (&cv);
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}
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pthread_cond_broadcast (&cv);
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}
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else
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{
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while (!exiting)
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{
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while (!nn && !exiting)
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pthread_cond_wait (&cv, &lock);
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--nn;
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pthread_mutex_unlock (&lock);
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pthread_mutex_lock (&lock);
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}
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}
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pthread_mutex_unlock (&lock);
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return NULL;
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}
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int
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do_test (void)
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{
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fd = open ("/dev/null", O_WRONLY);
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if (fd < 0)
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{
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printf ("couldn't open /dev/null, %m\n");
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return 1;
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}
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pthread_t th[count + 1];
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pthread_attr_t attr;
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int i, ret, sz;
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pthread_attr_init (&attr);
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sz = sysconf (_SC_PAGESIZE);
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#ifdef PTHREAD_STACK_MIN
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if (sz < PTHREAD_STACK_MIN)
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sz = PTHREAD_STACK_MIN;
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#endif
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pthread_attr_setstacksize (&attr, sz);
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for (i = 0; i <= count; ++i)
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if ((ret = pthread_create (&th[i], &attr, tf, (void *) (long) i)) != 0)
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{
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errno = ret;
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printf ("pthread_create %d failed: %m\n", i);
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return 1;
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}
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struct timespec ts = { .tv_sec = 20, .tv_nsec = 0 };
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while (nanosleep (&ts, &ts) != 0);
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pthread_mutex_lock (&lock);
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exiting = true;
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pthread_mutex_unlock (&lock);
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for (i = 0; i < count; ++i)
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pthread_join (th[i], NULL);
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close (fd);
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return 0;
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}
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#define TEST_FUNCTION do_test ()
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#define TIMEOUT 40
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#include "../test-skeleton.c"
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