nptl/tst-cond7.c

   1 /* Copyright (C) 2003-2017 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
   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    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <pthread.h>
  21 #include <stdbool.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <time.h>
  26 #include <sys/time.h>
  27
  28
  29 typedef struct
  30   {
  31     pthread_cond_t cond;
  32     pthread_mutex_t lock;
  33     pthread_t h;
  34   } T;
  35
  36
  37 static volatile bool done;
  38
  39
  40 static void *
  41 tf (void *arg)
  42 {
  43   puts ("child created");
  44
  45   if (pthread_setcancelstate (PTHREAD_CANCEL_ENABLE, NULL) != 0
  46       || pthread_setcanceltype (PTHREAD_CANCEL_DEFERRED, NULL) != 0)
  47     {
  48       puts ("cannot set cancellation options");
  49       exit (1);
  50     }
  51
  52   T *t = (T *) arg;
  53
  54   if (pthread_mutex_lock (&t->lock) != 0)
  55     {
  56       puts ("child: lock failed");
  57       exit (1);
  58     }
  59
  60   done = true;
  61
  62   if (pthread_cond_signal (&t->cond) != 0)
  63     {
  64       puts ("child: cond_signal failed");
  65       exit (1);
  66     }
  67
  68   if (pthread_cond_wait (&t->cond, &t->lock) != 0)
  69     {
  70       puts ("child: cond_wait failed");
  71       exit (1);
  72     }
  73
  74   if (pthread_mutex_unlock (&t->lock) != 0)
  75     {
  76       puts ("child: unlock failed");
  77       exit (1);
  78     }
  79
  80   return NULL;
  81 }
  82
  83
  84 static int
  85 do_test (void)
  86 {
  87   int i;
  88 #define N 100
  89   T *t[N];
  90   for (i = 0; i < N; ++i)
  91     {
  92       printf ("round %d\n", i);
  93
  94       t[i] = (T *) malloc (sizeof (T));
  95       if (t[i] == NULL)
  96         {
  97           puts ("out of memory");
  98           exit (1);
  99         }
 100
 101       if (pthread_mutex_init (&t[i]->lock, NULL) != 0
 102           || pthread_cond_init (&t[i]->cond, NULL) != 0)
 103         {
 104           puts ("an _init function failed");
 105           exit (1);
 106         }
 107
 108       if (pthread_mutex_lock (&t[i]->lock) != 0)
 109         {
 110           puts ("initial mutex_lock failed");
 111           exit (1);
 112         }
 113
 114       done = false;
 115
 116       if (pthread_create (&t[i]->h, NULL, tf, t[i]) != 0)
 117         {
 118           puts ("pthread_create failed");
 119           exit (1);
 120         }
 121
 122       do
 123         if (pthread_cond_wait (&t[i]->cond, &t[i]->lock) != 0)
 124           {
 125             puts ("cond_wait failed");
 126             exit (1);
 127           }
 128       while (! done);
 129
 130       /* Release the lock since the cancel handler will get it.  */
 131       if (pthread_mutex_unlock (&t[i]->lock) != 0)
 132         {
 133           puts ("mutex_unlock failed");
 134           exit (1);
 135         }
 136
 137       if (pthread_cancel (t[i]->h) != 0)
 138         {
 139           puts ("cancel failed");
 140           exit (1);
 141         }
 142
 143       puts ("parent: joining now");
 144
 145       void *result;
 146       if (pthread_join (t[i]->h, &result) != 0)
 147         {
 148           puts ("join failed");
 149           exit (1);
 150         }
 151
 152       if (result != PTHREAD_CANCELED)
 153         {
 154           puts ("result != PTHREAD_CANCELED");
 155           exit (1);
 156         }
 157     }
 158
 159   for (i = 0; i < N; ++i)
 160     free (t[i]);
 161
 162   return 0;
 163 }
 164
 165
 166 #define TEST_FUNCTION do_test ()
 167 #include "../test-skeleton.c"