1 /* Test of spin locks for communication between threads and signal handlers. 2 Copyright (C) 2005, 2008-2021 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 }