nptl/tst-mutex7.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 <pthread.h>
  21 #include <stdio.h>
  22 #include <time.h>
  23
  24
  25 static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
  26
  27
  28 #define ROUNDS 1000
  29 #define N 100
  30
  31
  32 static void *
  33 tf (void *arg)
  34 {
  35   int nr = (long int) arg;
  36   int cnt;
  37   struct timespec ts = { .tv_sec = 0, .tv_nsec = 11000 };
  38
  39   for (cnt = 0; cnt < ROUNDS; ++cnt)
  40     {
  41       if (pthread_mutex_lock (&lock) != 0)
  42         {
  43           printf ("thread %d: failed to get the lock\n", nr);
  44           return (void *) 1l;
  45         }
  46
  47       if (pthread_mutex_unlock (&lock) != 0)
  48         {
  49           printf ("thread %d: failed to release the lock\n", nr);
  50           return (void *) 1l;
  51         }
  52
  53       nanosleep (&ts, NULL);
  54     }
  55
  56   return NULL;
  57 }
  58
  59
  60 static int
  61 do_test (void)
  62 {
  63   pthread_t th[N];
  64   int cnt;
  65
  66   if (pthread_mutex_lock (&lock) != 0)
  67     {
  68       puts ("locking in parent failed");
  69       return 1;
  70     }
  71
  72   for (cnt = 0; cnt < N; ++cnt)
  73     if (pthread_create (&th[cnt], NULL, tf, (void *) (long int) cnt) != 0)
  74       {
  75         printf ("creating thread %d failed\n", cnt);
  76         return 1;
  77       }
  78
  79   if (pthread_mutex_unlock (&lock) != 0)
  80     {
  81       puts ("unlocking in parent failed");
  82       return 1;
  83     }
  84
  85   for (cnt = 0; cnt < N; ++cnt)
  86     if (pthread_join (th[cnt], NULL) != 0)
  87       {
  88         printf ("joining thread %d failed\n", cnt);
  89         return 1;
  90       }
  91
  92   return 0;
  93 }
  94
  95 #define TIMEOUT 60
  96 #define TEST_FUNCTION do_test ()
  97 #include "../test-skeleton.c"