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Diffstat (limited to 'sysdeps/pthread/tst-mutex7.c')
| -rw-r--r-- | sysdeps/pthread/tst-mutex7.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/sysdeps/pthread/tst-mutex7.c b/sysdeps/pthread/tst-mutex7.c new file mode 100644 index 0000000000..3938670b54 --- /dev/null +++ b/sysdeps/pthread/tst-mutex7.c @@ -0,0 +1,189 @@ +/* Copyright (C) 2002-2020 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. + + 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 <time.h> + +/* This test is a template for other tests to use. Other tests define + the following macros to change the behaviour of the template test. + The test is very simple, it configures N threads given the parameters + below and then proceeds to go through mutex lock and unlock + operations in each thread as described before for the thread + function. */ +#ifndef TYPE +# define TYPE PTHREAD_MUTEX_DEFAULT +#endif +#ifndef ROBUST +# define ROBUST PTHREAD_MUTEX_STALLED +#endif +#ifndef DELAY_NSEC +# define DELAY_NSEC 11000 +#endif +#ifndef ROUNDS +# define ROUNDS 1000 +#endif +#ifndef N +# define N 100 +#endif + +static pthread_mutex_t lock; + +/* Each thread locks and the subsequently unlocks the lock, yielding + the smallest critical section possible. After the unlock the thread + waits DELAY_NSEC nanoseconds before doing the lock and unlock again. + Every thread does this ROUNDS times. The lock and unlock are + checked for errors. */ +static void * +tf (void *arg) +{ + int nr = (long int) arg; + int cnt; + struct timespec ts = { .tv_sec = 0, .tv_nsec = DELAY_NSEC }; + + for (cnt = 0; cnt < ROUNDS; ++cnt) + { + if (pthread_mutex_lock (&lock) != 0) + { + printf ("thread %d: failed to get the lock\n", nr); + return (void *) 1l; + } + + if (pthread_mutex_unlock (&lock) != 0) + { + printf ("thread %d: failed to release the lock\n", nr); + return (void *) 1l; + } + + if ((ts.tv_sec > 0) || (ts.tv_nsec > 0)) + nanosleep (&ts, NULL); + } + + return NULL; +} + +/* Setup and run N threads, where each thread does as described + in the above thread function. The threads are given a minimal 1MiB + stack since they don't do anything between the lock and unlock. */ +static int +do_test (void) +{ + pthread_mutexattr_t a; + + if (pthread_mutexattr_init (&a) != 0) + { + puts ("mutexattr_init failed"); + exit (1); + } + + if (pthread_mutexattr_settype (&a, TYPE) != 0) + { + puts ("mutexattr_settype failed"); + exit (1); + } + + if (pthread_mutexattr_setrobust (&a, ROBUST) != 0) + { + puts ("mutexattr_setrobust failed"); + exit (1); + } + +#ifdef ENABLE_PI + if (pthread_mutexattr_setprotocol (&a, PTHREAD_PRIO_INHERIT) != 0) + { + puts ("pthread_mutexattr_setprotocol failed"); + return 1; + } +#endif + + int e = pthread_mutex_init (&lock, &a); + if (e != 0) + { +#ifdef ENABLE_PI + if (e == ENOTSUP) + { + puts ("PI mutexes unsupported"); + return 0; + } +#endif + puts ("mutex_init failed"); + return 1; + } + + if (pthread_mutexattr_destroy (&a) != 0) + { + puts ("mutexattr_destroy failed"); + return 1; + } + + pthread_attr_t at; + pthread_t th[N]; + 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_mutex_lock (&lock) != 0) + { + puts ("locking in parent failed"); + return 1; + } + + for (cnt = 0; cnt < N; ++cnt) + if (pthread_create (&th[cnt], &at, tf, (void *) (long int) cnt) != 0) + { + printf ("creating thread %d failed\n", cnt); + return 1; + } + + if (pthread_attr_destroy (&at) != 0) + { + puts ("attr_destroy failed"); + return 1; + } + + if (pthread_mutex_unlock (&lock) != 0) + { + puts ("unlocking in parent failed"); + return 1; + } + + for (cnt = 0; cnt < N; ++cnt) + if (pthread_join (th[cnt], NULL) != 0) + { + printf ("joining thread %d failed\n", cnt); + return 1; + } + + return 0; +} + +#define TIMEOUT 60 +#define TEST_FUNCTION do_test () +#include "../test-skeleton.c" |