tests/test-asyncsafe-spin1.c

   1 /* Test of spin locks for communication between threads and signal handlers.
   2    Copyright (C) 2005, 2008-2024 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation, either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Bruno Haible <bruno@clisp.org>, 2020.  */
  18
  19 #include <config.h>
  20
  21 /* Specification.  */
  22 #include "asyncsafe-spin.h"
  23
  24 #include <signal.h>
  25
  26 asyncsafe_spinlock_t global_spin_lock = ASYNCSAFE_SPIN_INIT;
  27
  28 int
  29 main (void)
  30 {
  31   sigset_t set;
  32
  33   sigemptyset (&set);
  34   sigaddset (&set, SIGINT);
  35
  36   /* Check a spin-lock initialized through the constant initializer.  */
  37   {
  38     sigset_t saved_set;
  39     asyncsafe_spin_lock (&global_spin_lock, &set, &saved_set);
  40     asyncsafe_spin_unlock (&global_spin_lock, &saved_set);
  41   }
  42
  43   /* Check a spin-lock initialized through asyncsafe_spin_init.  */
  44   {
  45     asyncsafe_spinlock_t local_spin_lock;
  46     int i;
  47
  48     asyncsafe_spin_init (&local_spin_lock);
  49
  50     for (i = 0; i < 10; i++)
  51       {
  52         sigset_t saved_set;
  53         asyncsafe_spin_lock (&local_spin_lock, &set, &saved_set);
  54         asyncsafe_spin_unlock (&local_spin_lock, &saved_set);
  55       }
  56
  57     asyncsafe_spin_destroy (&local_spin_lock);
  58   }
  59
  60   return 0;
  61 }