nptl/tst-once4.c

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