nptl/tst-once3.c

   1 /* Copyright (C) 2002, 2003 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
  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 static void
  59 once_handler2 (void)
  60 {
  61   global = 1;
  62 }
  63
  64
  65 static void *
  66 tf (void *arg)
  67 {
  68   pthread_once (&once, once_handler1);
  69
  70   /* We should never get here.  */
  71   puts ("pthread_once in tf returned");
  72   exit (1);
  73 }
  74
  75
  76 static int
  77 do_test (void)
  78 {
  79   pthread_t th;
  80
  81   if (pthread_barrier_init (&bar, NULL, 2) != 0)
  82     {
  83       puts ("barrier_init failed");
  84       exit (1);
  85     }
  86
  87   if (pthread_create (&th, NULL, tf, NULL) != 0)
  88     {
  89       puts ("first create failed");
  90       exit (1);
  91     }
  92
  93   int r = pthread_barrier_wait (&bar);
  94   if (r != 0 && r!= PTHREAD_BARRIER_SERIAL_THREAD)
  95     {
  96       puts ("barrier_wait failed");
  97       exit (1);
  98     }
  99
 100   if (pthread_mutex_lock (&mut) != 0)
 101     {
 102       puts ("mutex_lock failed");
 103       exit (1);
 104     }
 105   /* We unlock the mutex so that we catch the case where the pthread_cond_wait
 106      call incorrectly resumes and tries to get the mutex.  */
 107   if (pthread_mutex_unlock (&mut) != 0)
 108     {
 109       puts ("mutex_unlock failed");
 110       exit (1);
 111     }
 112
 113   /* Cancel the thread.  */
 114   if (pthread_cancel (th) != 0)
 115     {
 116       puts ("cancel failed");
 117       exit (1);
 118     }
 119
 120   void *result;
 121   pthread_join (th, &result);
 122   if (result != PTHREAD_CANCELED)
 123     {
 124       puts ("join didn't return PTHREAD_CANCELED");
 125       exit (1);
 126     }
 127
 128   pthread_once (&once, once_handler2);
 129
 130   if (global != 1)
 131     {
 132       puts ("global still 0");
 133       exit (1);
 134     }
 135
 136   return 0;
 137 }
 138
 139 #define TEST_FUNCTION do_test ()
 140 #define TIMEOUT 4
 141 #include "../test-skeleton.c"