| /* Test case for hand function calls in multi-threaded program. |
| |
| Copyright 2008-2013 Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program 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 General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| #include <pthread.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <time.h> |
| #include <unistd.h> |
| |
| #ifndef NR_THREADS |
| #define NR_THREADS 4 |
| #endif |
| |
| int thread_count; |
| |
| pthread_mutex_t thread_count_mutex; |
| |
| pthread_cond_t thread_count_condvar; |
| |
| void |
| incr_thread_count (void) |
| { |
| pthread_mutex_lock (&thread_count_mutex); |
| ++thread_count; |
| if (thread_count == NR_THREADS) |
| pthread_cond_signal (&thread_count_condvar); |
| pthread_mutex_unlock (&thread_count_mutex); |
| } |
| |
| void |
| cond_wait (pthread_cond_t *cond, pthread_mutex_t *mut) |
| { |
| pthread_mutex_lock (mut); |
| pthread_cond_wait (cond, mut); |
| pthread_mutex_unlock (mut); |
| } |
| |
| void |
| noreturn (void) |
| { |
| pthread_mutex_t mut; |
| pthread_cond_t cond; |
| |
| pthread_mutex_init (&mut, NULL); |
| pthread_cond_init (&cond, NULL); |
| |
| /* Wait for a condition that will never be signaled, so we effectively |
| block the thread here. */ |
| cond_wait (&cond, &mut); |
| } |
| |
| void * |
| forever_pthread (void *unused) |
| { |
| incr_thread_count (); |
| noreturn (); |
| } |
| |
| void |
| hand_call (void) |
| { |
| } |
| |
| /* Wait until all threads are running. */ |
| |
| void |
| wait_all_threads_running (void) |
| { |
| pthread_mutex_lock (&thread_count_mutex); |
| if (thread_count == NR_THREADS) |
| { |
| pthread_mutex_unlock (&thread_count_mutex); |
| return; |
| } |
| pthread_cond_wait (&thread_count_condvar, &thread_count_mutex); |
| if (thread_count == NR_THREADS) |
| { |
| pthread_mutex_unlock (&thread_count_mutex); |
| return; |
| } |
| pthread_mutex_unlock (&thread_count_mutex); |
| printf ("failed waiting for all threads to start\n"); |
| abort (); |
| } |
| |
| /* Called when all threads are running. |
| Easy place for a breakpoint. */ |
| |
| void |
| all_threads_running (void) |
| { |
| } |
| |
| int |
| main (void) |
| { |
| pthread_t forever[NR_THREADS]; |
| int i; |
| |
| pthread_mutex_init (&thread_count_mutex, NULL); |
| pthread_cond_init (&thread_count_condvar, NULL); |
| |
| for (i = 0; i < NR_THREADS; ++i) |
| pthread_create (&forever[i], NULL, forever_pthread, NULL); |
| |
| wait_all_threads_running (); |
| all_threads_running (); |
| |
| return 0; |
| } |
| |