nptl/tst-once4.c

   1 /* Copyright (C) 2003, 2004 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@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, 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 <time.h>
  24 #include <unistd.h>
  25
  26
  27 static pthread_once_t once = PTHREAD_ONCE_INIT;
  28
  29 static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
  30 static pthread_mutex_t mut = PTHREAD_MUTEX_INITIALIZER;
  31
  32 static pthread_barrier_t bar;
  33
  34 static int global;
  35 static int cl_called;
  36
  37 static void
  38 once_handler1 (void)
  39 {
  40   if (pthread_mutex_lock (&mut) != 0)
  41     {
  42       puts ("once_handler1: mutex_lock failed");
  43       exit (1);
  44     }
  45
  46   int r = pthread_barrier_wait (&bar);
  47   if (r != 0 && r!= PTHREAD_BARRIER_SERIAL_THREAD)
  48     {
  49       puts ("once_handler1: barrier_wait failed");
  50       exit (1);
  51     }
  52
  53   pthread_cond_wait (&cond, &mut);
  54
  55   /* We should never get here.  */
  56 }
  57
  58
  59 static void
  60 once_handler2 (void)
  61 {
  62   global = 1;
  63 }
  64
  65
  66 static void
  67 cl (void *arg)
  68 {
  69   ++cl_called;
  70 }
  71
  72
  73 static void *
  74 tf1 (void *arg)
  75 {
  76   pthread_cleanup_push (cl, NULL);
  77
  78   pthread_once (&once, once_handler1);
  79
  80   pthread_cleanup_pop (0);
  81
  82   /* We should never get here.  */
  83   puts ("pthread_once in tf returned");
  84   exit (1);
  85 }
  86
  87
  88 static void *
  89 tf2 (void *arg)
  90 {
  91   pthread_cleanup_push (cl, NULL);
  92
  93   int r = pthread_barrier_wait (&bar);
  94   if (r != 0 && r!= PTHREAD_BARRIER_SERIAL_THREAD)
  95     {
  96       puts ("once_handler2: barrier_wait failed");
  97       exit (1);
  98     }
  99
 100   pthread_cleanup_pop (0);
 101
 102   pthread_once (&once, once_handler2);
 103
 104   return NULL;
 105 }
 106
 107
 108 static int
 109 do_test (void)
 110 {
 111   pthread_t th[2];
 112
 113   if (pthread_barrier_init (&bar, NULL, 2) != 0)
 114     {
 115       puts ("barrier_init failed");
 116       return 1;
 117     }
 118
 119   if (pthread_create (&th[0], NULL, tf1, NULL) != 0)
 120     {
 121       puts ("first create failed");
 122       return 1;
 123     }
 124
 125   int r = pthread_barrier_wait (&bar);
 126   if (r != 0 && r!= PTHREAD_BARRIER_SERIAL_THREAD)
 127     {
 128       puts ("first barrier_wait failed");
 129       return 1;
 130     }
 131
 132   if (pthread_mutex_lock (&mut) != 0)
 133     {
 134       puts ("mutex_lock failed");
 135       return 1;
 136     }
 137   /* We unlock the mutex so that we catch the case where the pthread_cond_wait
 138      call incorrectly resumes and tries to get the mutex.  */
 139   if (pthread_mutex_unlock (&mut) != 0)
 140     {
 141       puts ("mutex_unlock failed");
 142       return 1;
 143     }
 144
 145   if (pthread_create (&th[1], NULL, tf2, NULL) != 0)
 146     {
 147       puts ("second create failed");
 148       return 1;
 149     }
 150
 151   r = pthread_barrier_wait (&bar);
 152   if (r != 0 && r!= PTHREAD_BARRIER_SERIAL_THREAD)
 153     {
 154       puts ("second barrier_wait failed");
 155       return 1;
 156     }
 157
 158   /* Give the second thread a chance to reach the pthread_once call.  */
 159   sleep (2);
 160
 161   /* Cancel the thread.  */
 162   if (pthread_cancel (th[0]) != 0)
 163     {
 164       puts ("cancel failed");
 165       return 1;
 166     }
 167
 168   void *result;
 169   pthread_join (th[0], &result);
 170   if (result != PTHREAD_CANCELED)
 171     {
 172       puts ("first join didn't return PTHREAD_CANCELED");
 173       return 1;
 174     }
 175
 176   puts ("joined first thread");
 177
 178   pthread_join (th[1], &result);
 179   if (result != NULL)
 180     {
 181       puts ("second join didn't return PTHREAD_CANCELED");
 182       return 1;
 183     }
 184
 185   if (global != 1)
 186     {
 187       puts ("global still 0");
 188       return 1;
 189     }
 190
 191   if (cl_called != 1)
 192     {
 193       printf ("cl_called = %d\n", cl_called);
 194       return 1;
 195     }
 196
 197   return 0;
 198 }
 199
 200 #define TEST_FUNCTION do_test ()
 201 #define TIMEOUT 4
 202 #include "../test-skeleton.c"