120 lines
2.7 KiB
C
120 lines
2.7 KiB
C
/* Copyright (C) 2004-2018 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Jakub Jelinek <jakub@redhat.com>, 2004.
|
|
|
|
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
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <errno.h>
|
|
#include <limits.h>
|
|
#include <fcntl.h>
|
|
#include <pthread.h>
|
|
#include <stdbool.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
|
|
pthread_cond_t cv = PTHREAD_COND_INITIALIZER;
|
|
pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
|
|
bool exiting;
|
|
int fd, spins, nn;
|
|
enum { count = 8 }; /* Number of worker threads. */
|
|
|
|
void *
|
|
tf (void *id)
|
|
{
|
|
pthread_mutex_lock (&lock);
|
|
|
|
if ((long) id == 0)
|
|
{
|
|
while (!exiting)
|
|
{
|
|
if ((spins++ % 1000) == 0)
|
|
write (fd, ".", 1);
|
|
pthread_mutex_unlock (&lock);
|
|
|
|
pthread_mutex_lock (&lock);
|
|
int njobs = rand () % (count + 1);
|
|
nn = njobs;
|
|
if ((rand () % 30) == 0)
|
|
pthread_cond_broadcast (&cv);
|
|
else
|
|
while (njobs--)
|
|
pthread_cond_signal (&cv);
|
|
}
|
|
|
|
pthread_cond_broadcast (&cv);
|
|
}
|
|
else
|
|
{
|
|
while (!exiting)
|
|
{
|
|
while (!nn && !exiting)
|
|
pthread_cond_wait (&cv, &lock);
|
|
--nn;
|
|
pthread_mutex_unlock (&lock);
|
|
|
|
pthread_mutex_lock (&lock);
|
|
}
|
|
}
|
|
|
|
pthread_mutex_unlock (&lock);
|
|
return NULL;
|
|
}
|
|
|
|
int
|
|
do_test (void)
|
|
{
|
|
fd = open ("/dev/null", O_WRONLY);
|
|
if (fd < 0)
|
|
{
|
|
printf ("couldn't open /dev/null, %m\n");
|
|
return 1;
|
|
}
|
|
|
|
pthread_t th[count + 1];
|
|
pthread_attr_t attr;
|
|
int i, ret, sz;
|
|
pthread_attr_init (&attr);
|
|
sz = sysconf (_SC_PAGESIZE);
|
|
if (sz < PTHREAD_STACK_MIN)
|
|
sz = PTHREAD_STACK_MIN;
|
|
pthread_attr_setstacksize (&attr, sz);
|
|
|
|
for (i = 0; i <= count; ++i)
|
|
if ((ret = pthread_create (&th[i], &attr, tf, (void *) (long) i)) != 0)
|
|
{
|
|
errno = ret;
|
|
printf ("pthread_create %d failed: %m\n", i);
|
|
return 1;
|
|
}
|
|
|
|
struct timespec ts = { .tv_sec = 20, .tv_nsec = 0 };
|
|
while (nanosleep (&ts, &ts) != 0);
|
|
|
|
pthread_mutex_lock (&lock);
|
|
exiting = true;
|
|
pthread_mutex_unlock (&lock);
|
|
|
|
for (i = 0; i < count; ++i)
|
|
pthread_join (th[i], NULL);
|
|
|
|
close (fd);
|
|
return 0;
|
|
}
|
|
|
|
#define TEST_FUNCTION do_test ()
|
|
#define TIMEOUT 40
|
|
#include "../test-skeleton.c"
|