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128 lines
2.7 KiB
C
128 lines
2.7 KiB
C
/* Test case for hand function calls in multi-threaded program.
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Copyright 2008-2018 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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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 <time.h>
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#include <unistd.h>
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#ifndef NR_THREADS
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#define NR_THREADS 4
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#endif
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int thread_count;
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pthread_mutex_t thread_count_mutex;
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pthread_cond_t thread_count_condvar;
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void
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incr_thread_count (void)
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{
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pthread_mutex_lock (&thread_count_mutex);
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++thread_count;
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if (thread_count == NR_THREADS)
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pthread_cond_signal (&thread_count_condvar);
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pthread_mutex_unlock (&thread_count_mutex);
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}
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void
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cond_wait (pthread_cond_t *cond, pthread_mutex_t *mut)
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{
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pthread_mutex_lock (mut);
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pthread_cond_wait (cond, mut);
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pthread_mutex_unlock (mut);
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}
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void
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noreturn (void)
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{
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pthread_mutex_t mut;
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pthread_cond_t cond;
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pthread_mutex_init (&mut, NULL);
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pthread_cond_init (&cond, NULL);
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/* Wait for a condition that will never be signaled, so we effectively
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block the thread here. */
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cond_wait (&cond, &mut);
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}
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void *
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forever_pthread (void *unused)
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{
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incr_thread_count ();
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noreturn ();
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}
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void
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hand_call (void)
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{
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}
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/* Wait until all threads are running. */
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void
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wait_all_threads_running (void)
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{
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pthread_mutex_lock (&thread_count_mutex);
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if (thread_count == NR_THREADS)
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{
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pthread_mutex_unlock (&thread_count_mutex);
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return;
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}
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pthread_cond_wait (&thread_count_condvar, &thread_count_mutex);
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if (thread_count == NR_THREADS)
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{
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pthread_mutex_unlock (&thread_count_mutex);
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return;
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}
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pthread_mutex_unlock (&thread_count_mutex);
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printf ("failed waiting for all threads to start\n");
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abort ();
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}
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/* Called when all threads are running.
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Easy place for a breakpoint. */
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void
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all_threads_running (void)
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{
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}
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int
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main (void)
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{
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pthread_t forever[NR_THREADS];
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int i;
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pthread_mutex_init (&thread_count_mutex, NULL);
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pthread_cond_init (&thread_count_condvar, NULL);
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for (i = 0; i < NR_THREADS; ++i)
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pthread_create (&forever[i], NULL, forever_pthread, NULL);
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wait_all_threads_running ();
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all_threads_running ();
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return 0;
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}
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