nptl/tst-sem6.c

   1 /* Copyright (C) 2003 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
   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 <signal.h>
  23 #include <stdio.h>
  24 #include <unistd.h>
  25
  26
  27 static void
  28 handler (int sig)
  29 {
  30   struct sigaction sa;
  31
  32   sa.sa_handler = SIG_DFL;
  33   sa.sa_flags = 0;
  34   sigemptyset (&sa.sa_mask);
  35
  36   sigaction (SIGALRM, &sa, NULL);
  37
  38   /* Rearm the timer.  */
  39   alarm (1);
  40 }
  41
  42
  43 static int
  44 do_test (void)
  45 {
  46   sem_t s;
  47   struct sigaction sa;
  48
  49   sa.sa_handler = handler;
  50   sa.sa_flags = 0;
  51   sigemptyset (&sa.sa_mask);
  52
  53   sigaction (SIGALRM, &sa, NULL);
  54
  55   if (sem_init (&s, 0, 0) == -1)
  56     {
  57       puts ("init failed");
  58       return 1;
  59     }
  60
  61   /* Set an alarm for 1 second.  The wrapper will expect this.  */
  62   alarm (1);
  63
  64   int res = sem_wait (&s);
  65   if (res == 0)
  66     {
  67       puts ("wait succeeded");
  68       return 1;
  69     }
  70   if (res != -1 || errno != EINTR)
  71     {
  72       puts ("wait didn't fail with EINTR");
  73       return 1;
  74     }
  75
  76   return 0;
  77 }
  78
  79 #define TIMEOUT 3
  80 #define TEST_FUNCTION do_test ()
  81 #include "../test-skeleton.c"