nptl/tst-sem1.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 <errno.h>
  21 #include <semaphore.h>
  22 #include <stdio.h>
  23 #include <unistd.h>
  24
  25
  26 static int
  27 do_test (void)
  28 {
  29   sem_t s;
  30
  31   if (sem_init (&s, 0, 1) == -1)
  32     {
  33       puts ("init failed");
  34       return 1;
  35     }
  36
  37   if (TEMP_FAILURE_RETRY (sem_wait (&s)) == -1)
  38     {
  39       puts ("1st wait failed");
  40       return 1;
  41     }
  42
  43   if (sem_post (&s) == -1)
  44     {
  45       puts ("1st post failed");
  46       return 1;
  47     }
  48
  49   if (TEMP_FAILURE_RETRY (sem_trywait (&s)) == -1)
  50     {
  51       puts ("1st trywait failed");
  52       return 1;
  53     }
  54
  55   errno = 0;
  56   if (TEMP_FAILURE_RETRY (sem_trywait (&s)) != -1)
  57     {
  58       puts ("2nd trywait succeeded");
  59       return 1;
  60     }
  61   else if (errno != EAGAIN)
  62     {
  63       puts ("2nd trywait did not set errno to EAGAIN");
  64       return 1;
  65     }
  66
  67   if (sem_post (&s) == -1)
  68     {
  69       puts ("2nd post failed");
  70       return 1;
  71     }
  72
  73   if (TEMP_FAILURE_RETRY (sem_wait (&s)) == -1)
  74     {
  75       puts ("2nd wait failed");
  76       return 1;
  77     }
  78
  79   if (sem_destroy (&s) == -1)
  80     {
  81       puts ("destroy failed");
  82       return 1;
  83     }
  84
  85   return 0;
  86 }
  87
  88 #define TEST_FUNCTION do_test ()
  89 #include "../test-skeleton.c"