nptl/tst-once3.c

   1 /* Copyright (C) 2002, 2003, 2005 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
   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
  25
  26 #define N 100
  27
  28 static pthread_once_t once = PTHREAD_ONCE_INIT;
  29
  30 static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
  31 static pthread_mutex_t mut = PTHREAD_MUTEX_INITIALIZER;
  32
  33 static pthread_barrier_t bar;
  34
  35 static int global;
  36 static int cl_called;
  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   puts ("once_handler1: locked");
  47
  48   int r = pthread_barrier_wait (&bar);
  49   if (r != 0 && r!= PTHREAD_BARRIER_SERIAL_THREAD)
  50     {
  51       puts ("once_handler1: barrier_wait failed");
  52       exit (1);
  53     }
  54
  55   puts ("once_handler1: going to wait on cond");
  56
  57   pthread_cond_wait (&cond, &mut);
  58
  59   /* We should never get here.  */
  60   exit (42);
  61 }
  62
  63 static void
  64 once_handler2 (void)
  65 {
  66   global = 1;
  67 }
  68
  69
  70 static void
  71 cl (void *arg)
  72 {
  73   cl_called = 1;
  74 }
  75
  76
  77 static void *
  78 tf (void *arg)
  79 {
  80   pthread_cleanup_push (cl, NULL)
  81
  82   pthread_once (&once, once_handler1);
  83
  84   pthread_cleanup_pop (0);
  85
  86   /* We should never get here.  */
  87   puts ("pthread_once in tf returned");
  88   exit (1);
  89 }
  90
  91
  92 static int
  93 do_test (void)
  94 {
  95   pthread_t th;
  96
  97   if (pthread_barrier_init (&bar, NULL, 2) != 0)
  98     {
  99       puts ("barrier_init failed");
 100       return 1;
 101     }
 102
 103   if (pthread_create (&th, NULL, tf, NULL) != 0)
 104     {
 105       puts ("first create failed");
 106       return 1;
 107     }
 108
 109   int r = pthread_barrier_wait (&bar);
 110   if (r != 0 && r!= PTHREAD_BARRIER_SERIAL_THREAD)
 111     {
 112       puts ("barrier_wait failed");
 113       return 1;
 114     }
 115
 116   if (pthread_mutex_lock (&mut) != 0)
 117     {
 118       puts ("mutex_lock failed");
 119       return 1;
 120     }
 121   /* We unlock the mutex so that we catch the case where the pthread_cond_wait
 122      call incorrectly resumes and tries to get the mutex.  */
 123   if (pthread_mutex_unlock (&mut) != 0)
 124     {
 125       puts ("mutex_unlock failed");
 126       return 1;
 127     }
 128
 129   /* Cancel the thread.  */
 130   puts ("going to cancel");
 131   if (pthread_cancel (th) != 0)
 132     {
 133       puts ("cancel failed");
 134       return 1;
 135     }
 136
 137   void *result;
 138   pthread_join (th, &result);
 139   if (result != PTHREAD_CANCELED)
 140     {
 141       puts ("join didn't return PTHREAD_CANCELED");
 142       return 1;
 143     }
 144   puts ("joined successfully");
 145
 146   printf ("once = %d\n", *(int *) &once);
 147
 148   if (cl_called != 1)
 149     {
 150       puts ("cleanup handler not called");
 151       return 1;
 152     }
 153
 154   pthread_once (&once, once_handler2);
 155
 156   if (global != 1)
 157     {
 158       puts ("global still 0");
 159       return 1;
 160     }
 161
 162   return 0;
 163 }
 164
 165 #define TEST_FUNCTION do_test ()
 166 #define TIMEOUT 4
 167 #include "../test-skeleton.c"