nptl/tst-cond20.c

   1 /* Copyright (C) 2004 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Jakub Jelinek <jakub@redhat.com>, 2004.
   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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <pthread.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <unistd.h>
  25
  26 #define N 10
  27 #define ROUNDS 1000
  28 static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
  29 static pthread_cond_t cond2 = PTHREAD_COND_INITIALIZER;
  30 static pthread_mutex_t mut = PTHREAD_MUTEX_INITIALIZER;
  31 static pthread_barrier_t b;
  32 static int count;
  33
  34 static void *
  35 tf (void *p)
  36 {
  37   int i;
  38   for (i = 0; i < ROUNDS; ++i)
  39     {
  40       pthread_mutex_lock (&mut);
  41
  42       if (++count == N)
  43         pthread_cond_signal (&cond2);
  44
  45 #ifdef TIMED
  46       struct timeval tv;
  47       gettimeofday (&tv, NULL);
  48       struct timespec ts;
  49       /* Wait three seconds.  */
  50       ts.tv_sec = tv.tv_sec + 3;
  51       ts.tv_nsec = tv.tv_usec * 1000;
  52       pthread_cond_timedwait (&cond, &mut, &ts);
  53 #else
  54       pthread_cond_wait (&cond, &mut);
  55 #endif
  56
  57       pthread_mutex_unlock (&mut);
  58
  59       int err = pthread_barrier_wait (&b);
  60       if (err != 0 && err != PTHREAD_BARRIER_SERIAL_THREAD)
  61         {
  62           puts ("child: barrier_wait failed");
  63           exit (1);
  64         }
  65
  66       err = pthread_barrier_wait (&b);
  67       if (err != 0 && err != PTHREAD_BARRIER_SERIAL_THREAD)
  68         {
  69           puts ("child: barrier_wait failed");
  70           exit (1);
  71         }
  72     }
  73
  74   return NULL;
  75 }
  76
  77
  78 static int
  79 do_test (void)
  80 {
  81   if (pthread_barrier_init (&b, NULL, N + 1) != 0)
  82     {
  83       puts ("barrier_init failed");
  84       return 1;
  85     }
  86
  87   pthread_mutex_lock (&mut);
  88
  89   int i, j, err;
  90   pthread_t th[N];
  91   for (i = 0; i < N; ++i)
  92     if ((err = pthread_create (&th[i], NULL, tf, NULL)) != 0)
  93       {
  94         printf ("cannot create thread %d: %s\n", i, strerror (err));
  95         return 1;
  96       }
  97
  98   for (i = 0; i < ROUNDS; ++i)
  99     {
 100       pthread_cond_wait (&cond2, &mut);
 101
 102       if (i & 1)
 103         pthread_mutex_unlock (&mut);
 104
 105       if (i & 2)
 106         pthread_cond_broadcast (&cond);
 107       else if (i & 4)
 108         for (j = 0; j < N; ++j)
 109           pthread_cond_signal (&cond);
 110       else
 111         {
 112           for (j = 0; j < (i / 8) % N; ++j)
 113             pthread_cond_signal (&cond);
 114           pthread_cond_broadcast (&cond);
 115         }
 116
 117       if ((i & 1) == 0)
 118         pthread_mutex_unlock (&mut);
 119
 120       err = pthread_cond_destroy (&cond);
 121       if (err)
 122         {
 123           printf ("pthread_cond_destroy failed: %s\n", strerror (err));
 124           return 1;
 125         }
 126
 127       /* Now clobber the cond variable which has been successfully
 128          destroyed above.  */
 129       memset (&cond, (char) i, sizeof (cond));
 130
 131       err = pthread_barrier_wait (&b);
 132       if (err != 0 && err != PTHREAD_BARRIER_SERIAL_THREAD)
 133         {
 134           puts ("parent: barrier_wait failed");
 135           return 1;
 136         }
 137
 138       pthread_mutex_lock (&mut);
 139
 140       err = pthread_barrier_wait (&b);
 141       if (err != 0 && err != PTHREAD_BARRIER_SERIAL_THREAD)
 142         {
 143           puts ("parent: barrier_wait failed");
 144           return 1;
 145         }
 146
 147       count = 0;
 148       err = pthread_cond_init (&cond, NULL);
 149       if (err)
 150         {
 151           printf ("pthread_cond_init failed: %s\n", strerror (err));
 152           return 1;
 153         }
 154     }
 155
 156   for (i = 0; i < N; ++i)
 157     if ((err = pthread_join (th[i], NULL)) != 0)
 158       {
 159         printf ("failed to join thread %d: %s\n", i, strerror (err));
 160         return 1;
 161       }
 162
 163   puts ("done");
 164
 165   return 0;
 166 }
 167
 168
 169 #define TEST_FUNCTION do_test ()
 170 #include "../test-skeleton.c"