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      1 /* This testcase is part of GDB, the GNU debugger.
      2 
      3    Copyright 2017-2024 Free Software Foundation, Inc.
      4 
      5    This program is free software; you can redistribute it and/or modify
      6    it under the terms of the GNU General Public License as published by
      7    the Free Software Foundation; either version 3 of the License, or
      8    (at your option) any later version.
      9 
     10    This program is distributed in the hope that it will be useful,
     11    but WITHOUT ANY WARRANTY; without even the implied warranty of
     12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     13    GNU General Public License for more details.
     14 
     15    You should have received a copy of the GNU General Public License
     16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
     17 
     18 #include <pthread.h>
     19 
     20 static pthread_barrier_t barrier;
     21 static int dummy;
     22 
     23 static void *
     24 func1 (void *arg)
     25 {
     26   pthread_barrier_wait (&barrier);
     27   dummy = 1; /* bp1 */
     28   pthread_barrier_wait (&barrier);
     29   dummy = 1;
     30   pthread_barrier_wait (&barrier);
     31   return arg;
     32 }
     33 
     34 static void *
     35 func2 (void *arg)
     36 {
     37   pthread_barrier_wait (&barrier);
     38   dummy = 2;
     39   pthread_barrier_wait (&barrier);
     40   dummy = 2;
     41   pthread_barrier_wait (&barrier); /* bp2 */
     42   return arg;
     43 }
     44 
     45 int
     46 main (void)
     47 {
     48   pthread_t thread;
     49 
     50   pthread_barrier_init (&barrier, NULL, 2);
     51 
     52   pthread_create (&thread, NULL, func2, NULL);
     53   func1 (NULL);
     54 
     55   pthread_join (thread, NULL);
     56   pthread_barrier_destroy (&barrier);
     57   return 0;
     58 }
     59