nptl/tst-sem6.c

   1 /* Copyright (C) 2003-2017 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, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <semaphore.h>
  21 #include <signal.h>
  22 #include <stdio.h>
  23 #include <unistd.h>
  24
  25
  26 static void
  27 handler (int sig)
  28 {
  29   struct sigaction sa;
  30
  31   sa.sa_handler = SIG_DFL;
  32   sa.sa_flags = 0;
  33   sigemptyset (&sa.sa_mask);
  34
  35   sigaction (SIGALRM, &sa, NULL);
  36
  37   /* Rearm the timer.  */
  38   alarm (1);
  39 }
  40
  41
  42 static int
  43 do_test (void)
  44 {
  45   sem_t s;
  46   struct sigaction sa;
  47
  48   sa.sa_handler = handler;
  49   sa.sa_flags = 0;
  50   sigemptyset (&sa.sa_mask);
  51
  52   sigaction (SIGALRM, &sa, NULL);
  53
  54   if (sem_init (&s, 0, 0) == -1)
  55     {
  56       puts ("init failed");
  57       return 1;
  58     }
  59
  60   /* Set an alarm for 1 second.  The wrapper will expect this.  */
  61   alarm (1);
  62
  63   int res = sem_wait (&s);
  64   if (res == 0)
  65     {
  66       puts ("wait succeeded");
  67       return 1;
  68     }
  69   if (res != -1 || errno != EINTR)
  70     {
  71       puts ("wait didn't fail with EINTR");
  72       return 1;
  73     }
  74
  75   return 0;
  76 }
  77
  78 #define TIMEOUT 3
  79 #define TEST_FUNCTION do_test ()
  80 #include "../test-skeleton.c"