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97 lines
2.4 KiB
C
97 lines
2.4 KiB
C
/* Copyright (C) 2002-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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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 <error.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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static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
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static pthread_mutex_t mut = PTHREAD_MUTEX_INITIALIZER;
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static void *
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tf (void *p)
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{
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int err;
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err = pthread_mutex_lock (&mut);
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if (err != 0)
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error (EXIT_FAILURE, err, "child: cannot get mutex");
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puts ("child: got mutex; signalling");
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pthread_cond_signal (&cond);
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puts ("child: unlock");
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err = pthread_mutex_unlock (&mut);
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if (err != 0)
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error (EXIT_FAILURE, err, "child: cannot unlock");
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puts ("child: done");
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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_t th;
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int err;
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printf ("&cond = %p\n&mut = %p\n", &cond, &mut);
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puts ("parent: get mutex");
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err = pthread_mutex_lock (&mut);
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if (err != 0)
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error (EXIT_FAILURE, err, "parent: cannot get mutex");
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puts ("parent: create child");
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err = pthread_create (&th, NULL, tf, NULL);
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if (err != 0)
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error (EXIT_FAILURE, err, "parent: cannot create thread");
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puts ("parent: wait for condition");
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/* This test will fail on spurious wake-ups, which are allowed; however,
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the current implementation shouldn't produce spurious wake-ups in the
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scenario we are testing here. */
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err = pthread_cond_wait (&cond, &mut);
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if (err != 0)
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error (EXIT_FAILURE, err, "parent: cannot wait fir signal");
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puts ("parent: got signal");
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err = pthread_join (th, NULL);
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if (err != 0)
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error (EXIT_FAILURE, err, "parent: failed to join");
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puts ("done");
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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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