sysdeps/pthread/tst-barrier4.c

   1 /* This tests destruction of a barrier right after waiting on it.
   2    Copyright (C) 2004-2021 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library 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 GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <pthread.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23
  24
  25 static pthread_barrier_t b1;
  26 static pthread_barrier_t b2;
  27
  28
  29 #define N 20
  30
  31 static void *
  32 tf (void *arg)
  33 {
  34   int round = 0;
  35
  36   while (round++ < 30)
  37     {
  38       if (pthread_barrier_wait (&b1) == PTHREAD_BARRIER_SERIAL_THREAD)
  39         {
  40           pthread_barrier_destroy (&b1);
  41           if (pthread_barrier_init (&b1, NULL, N) != 0)
  42             {
  43               puts ("tf: 1st barrier_init failed");
  44               exit (1);
  45             }
  46         }
  47
  48       if (pthread_barrier_wait (&b2) == PTHREAD_BARRIER_SERIAL_THREAD)
  49         {
  50           pthread_barrier_destroy (&b2);
  51           if (pthread_barrier_init (&b2, NULL, N) != 0)
  52             {
  53               puts ("tf: 2nd barrier_init failed");
  54               exit (1);
  55             }
  56         }
  57     }
  58
  59   return NULL;
  60 }
  61
  62
  63 static int
  64 do_test (void)
  65 {
  66   pthread_attr_t at;
  67   int cnt;
  68
  69   if (pthread_attr_init (&at) != 0)
  70     {
  71       puts ("attr_init failed");
  72       return 1;
  73     }
  74
  75   if (pthread_attr_setstacksize (&at, 1 * 1024 * 1024) != 0)
  76     {
  77       puts ("attr_setstacksize failed");
  78       return 1;
  79     }
  80
  81   if (pthread_barrier_init (&b1, NULL, N) != 0)
  82     {
  83       puts ("1st barrier_init failed");
  84       return 1;
  85     }
  86
  87   if (pthread_barrier_init (&b2, NULL, N) != 0)
  88     {
  89       puts ("2nd barrier_init failed");
  90       return 1;
  91     }
  92
  93   pthread_t th[N - 1];
  94   for (cnt = 0; cnt < N - 1; ++cnt)
  95     if (pthread_create (&th[cnt], &at, tf, NULL) != 0)
  96       {
  97         puts ("pthread_create failed");
  98         return 1;
  99       }
 100
 101   if (pthread_attr_destroy (&at) != 0)
 102     {
 103       puts ("attr_destroy failed");
 104       return 1;
 105     }
 106
 107   tf (NULL);
 108
 109   for (cnt = 0; cnt < N - 1; ++cnt)
 110     if (pthread_join (th[cnt], NULL) != 0)
 111       {
 112         puts ("pthread_join failed");
 113         return 1;
 114       }
 115
 116   return 0;
 117 }
 118
 119 #define TEST_FUNCTION do_test ()
 120 #include "../test-skeleton.c"