nptl/tst-mutex5.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 <errno.h>
  21 #include <pthread.h>
  22 #include <stdio.h>
  23 #include <time.h>
  24 #include <unistd.h>
  25 #include <sys/time.h>
  26
  27
  28 static int
  29 do_test (void)
  30 {
  31   pthread_mutex_t m;
  32   struct timespec ts;
  33   struct timeval tv;
  34   struct timeval tv2;
  35   int err;
  36
  37   if (pthread_mutex_init (&m, NULL) != 0)
  38     {
  39       puts ("mutex_init failed");
  40       return 1;
  41     }
  42
  43   if (pthread_mutex_lock (&m) != 0)
  44     {
  45       puts ("mutex_lock failed");
  46       return 1;
  47     }
  48
  49   if (pthread_mutex_trylock (&m) == 0)
  50     {
  51       puts ("mutex_trylock succeeded");
  52       return 1;
  53     }
  54
  55   gettimeofday (&tv, NULL);
  56   TIMEVAL_TO_TIMESPEC (&tv, &ts);
  57
  58   ts.tv_sec += 2;       /* Wait 2 seconds.  */
  59
  60   err = pthread_mutex_timedlock (&m, &ts);
  61   if (err == 0)
  62     {
  63       puts ("timedlock succeeded");
  64       return 1;
  65     }
  66   else if (err != ETIMEDOUT)
  67     {
  68       printf ("timedlock error != ETIMEDOUT: %d\n", err);
  69       return 1;
  70     }
  71   else
  72     {
  73       int clk_tck = sysconf (_SC_CLK_TCK);
  74
  75       gettimeofday (&tv2, NULL);
  76
  77       tv2.tv_sec -= tv.tv_sec;
  78       tv2.tv_usec -= tv.tv_usec;
  79       if (tv2.tv_usec < 0)
  80         {
  81           tv2.tv_usec += 1000000;
  82           tv2.tv_sec -= 1;
  83         }
  84
  85       /* Be a bit tolerant, add one CLK_TCK.  */
  86       tv2.tv_usec += 1000000 / clk_tck;
  87       if (tv2.tv_usec >= 1000000)
  88         {
  89           tv2.tv_usec -= 1000000;
  90           ++tv2.tv_sec;
  91         }
  92
  93       if (tv2.tv_sec < 2)
  94         {
  95           printf ("premature timeout: %ld.%06ld difference\n",
  96                   tv2.tv_sec, tv2.tv_usec);
  97           return 1;
  98         }
  99     }
 100
 101   (void) gettimeofday (&tv, NULL);
 102   TIMEVAL_TO_TIMESPEC (&tv, &ts);
 103
 104   ts.tv_sec += 2;       /* Wait 2 seconds.  */
 105   /* The following makes the ts value invalid.  */
 106   ts.tv_nsec += 1000000000;
 107
 108   err = pthread_mutex_timedlock (&m, &ts);
 109   if (err == 0)
 110     {
 111       puts ("2nd timedlock succeeded");
 112       return 1;
 113     }
 114   else if (err != EINVAL)
 115     {
 116       printf ("2nd timedlock error != EINVAL: %d\n", err);
 117       return 1;
 118     }
 119
 120   if (pthread_mutex_unlock (&m) != 0)
 121     {
 122       puts ("mutex_unlock failed");
 123       return 1;
 124     }
 125
 126   (void) gettimeofday (&tv, NULL);
 127   TIMEVAL_TO_TIMESPEC (&tv, &ts);
 128
 129   ts.tv_sec += 2;       /* Wait 2 seconds.  */
 130   if (pthread_mutex_timedlock (&m, &ts) != 0)
 131     {
 132       puts ("3rd timedlock failed");
 133     }
 134
 135   (void) gettimeofday (&tv2, NULL);
 136
 137   /* Check that timedlock didn't delay.  We use a limit of 0.1 secs.  */
 138   timersub (&tv2, &tv, &tv2);
 139   if (tv2.tv_sec > 0 || tv2.tv_usec > 100000)
 140     {
 141       puts ("3rd timedlock didn't return right away");
 142       exit (1);
 143     }
 144
 145   if (pthread_mutex_destroy (&m) != 0)
 146     {
 147       puts ("mutex_destroy failed");
 148       return 1;
 149     }
 150
 151   return 0;
 152 }
 153
 154 #define TIMEOUT 4
 155 #define TEST_FUNCTION do_test ()
 156 #include "../test-skeleton.c"