nptl/tst-cond1.c

   1 /* Copyright (C) 2002 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 <error.h>
  21 #include <pthread.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24
  25
  26 static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
  27 static pthread_mutex_t mut = PTHREAD_MUTEX_INITIALIZER;
  28
  29
  30 static void *
  31 tf (void *p)
  32 {
  33   int err;
  34
  35   err = pthread_mutex_lock (&mut);
  36   if (err != 0)
  37     error (EXIT_FAILURE, err, "child: cannot get mutex");
  38
  39   puts ("child: got mutex; signalling");
  40
  41   pthread_cond_signal (&cond);
  42
  43   puts ("child: unlock");
  44
  45   err = pthread_mutex_unlock (&mut);
  46   if (err != 0)
  47     error (EXIT_FAILURE, err, "child: cannot unlock");
  48
  49   puts ("child: done");
  50
  51   return NULL;
  52 }
  53
  54
  55 static int
  56 do_test (void)
  57 {
  58   pthread_t th;
  59   int err;
  60
  61   printf ("&cond = %p\n&mut = %p\n", &cond, &mut);
  62
  63   puts ("parent: get mutex");
  64
  65   err = pthread_mutex_lock (&mut);
  66   if (err != 0)
  67     error (EXIT_FAILURE, err, "parent: cannot get mutex");
  68
  69   puts ("parent: create child");
  70
  71   err = pthread_create (&th, NULL, tf, NULL);
  72   if (err != 0)
  73     error (EXIT_FAILURE, err, "parent: cannot create thread");
  74
  75   puts ("parent: wait for condition");
  76
  77   err = pthread_cond_wait (&cond, &mut);
  78   if (err != 0)
  79     error (EXIT_FAILURE, err, "parent: cannot wait fir signal");
  80
  81   puts ("parent: got signal");
  82
  83   err = pthread_join (th, NULL);
  84   if (err != 0)
  85     error (EXIT_FAILURE, err, "parent: failed to join");
  86
  87   puts ("done");
  88
  89   return 0;
  90 }
  91
  92
  93 #define TEST_FUNCTION do_test ()
  94 #include "../test-skeleton.c"