nptl/tst-sem5.c

   1 /* Copyright (C) 2002, 2003, 2009 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 <semaphore.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   sem_t s;
  32   struct timespec ts;
  33   struct timeval tv;
  34
  35   if (sem_init (&s, 0, 1) == -1)
  36     {
  37       puts ("sem_init failed");
  38       return 1;
  39     }
  40
  41   if (TEMP_FAILURE_RETRY (sem_wait (&s)) == -1)
  42     {
  43       puts ("sem_wait failed");
  44       return 1;
  45     }
  46
  47   if (gettimeofday (&tv, NULL) != 0)
  48     {
  49       puts ("gettimeofday failed");
  50       return 1;
  51     }
  52
  53   TIMEVAL_TO_TIMESPEC (&tv, &ts);
  54
  55   /* We wait for half a second.  */
  56   ts.tv_nsec += 500000000;
  57   if (ts.tv_nsec >= 1000000000)
  58     {
  59       ++ts.tv_sec;
  60       ts.tv_nsec -= 1000000000;
  61     }
  62
  63   errno = 0;
  64   if (TEMP_FAILURE_RETRY (sem_timedwait (&s, &ts)) != -1)
  65     {
  66       puts ("sem_timedwait succeeded");
  67       return 1;
  68     }
  69   if (errno != ETIMEDOUT)
  70     {
  71       printf ("sem_timedwait return errno = %d instead of ETIMEDOUT\n",
  72               errno);
  73       return 1;
  74     }
  75
  76   struct timespec ts2;
  77   if (clock_gettime (CLOCK_REALTIME, &ts2) != 0)
  78     {
  79       puts ("clock_gettime failed");
  80       return 1;
  81     }
  82
  83   if (ts2.tv_sec < ts.tv_sec
  84       || (ts2.tv_sec == ts.tv_sec && ts2.tv_nsec < ts.tv_nsec))
  85     {
  86       puts ("timeout too short");
  87       return 1;
  88     }
  89
  90   return 0;
  91 }
  92
  93 #define TEST_FUNCTION do_test ()
  94 #include "../test-skeleton.c"