| /* Test of pthread_sigmask in a multi-threaded program. |
| Copyright (C) 2011-2020 Free Software Foundation, Inc. |
| |
| This program is free software: you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <https://www.gnu.org/licenses/>. */ |
| |
| /* Written by Bruno Haible <bruno@clisp.org>, 2011. */ |
| |
| #include <config.h> |
| |
| #include <signal.h> |
| |
| #include <errno.h> |
| #include <pthread.h> |
| #include <stdio.h> |
| #include <unistd.h> |
| |
| #include "macros.h" |
| |
| #if USE_POSIX_THREADS || USE_ISOC_AND_POSIX_THREADS |
| |
| static pthread_t main_thread; |
| static pthread_t killer_thread; |
| |
| static void * |
| killer_thread_func (void *arg) |
| { |
| sleep (1); |
| pthread_kill (main_thread, SIGINT); |
| return NULL; |
| } |
| |
| static volatile int sigint_occurred; |
| |
| static void |
| sigint_handler (int sig) |
| { |
| sigint_occurred++; |
| } |
| |
| int |
| main (int argc, char *argv[]) |
| { |
| sigset_t set; |
| |
| signal (SIGINT, sigint_handler); |
| |
| sigemptyset (&set); |
| sigaddset (&set, SIGINT); |
| |
| /* Check error handling. */ |
| /* This call returns 0 on NetBSD 8.0. */ |
| #if !defined __NetBSD__ |
| ASSERT (pthread_sigmask (1729, &set, NULL) == EINVAL); |
| #endif |
| |
| /* Block SIGINT. */ |
| ASSERT (pthread_sigmask (SIG_BLOCK, &set, NULL) == 0); |
| |
| /* Request a SIGINT signal from another thread. */ |
| main_thread = pthread_self (); |
| ASSERT (pthread_create (&killer_thread, NULL, killer_thread_func, NULL) == 0); |
| |
| /* Wait. */ |
| sleep (2); |
| |
| /* The signal should not have arrived yet, because it is blocked. */ |
| ASSERT (sigint_occurred == 0); |
| |
| /* Unblock SIGINT. */ |
| ASSERT (pthread_sigmask (SIG_UNBLOCK, &set, NULL) == 0); |
| |
| /* The signal should have arrived now, because POSIX says |
| "If there are any pending unblocked signals after the call to |
| pthread_sigmask(), at least one of those signals shall be delivered |
| before the call to pthread_sigmask() returns." */ |
| ASSERT (sigint_occurred == 1); |
| |
| /* Clean up the thread. This avoid a "ThreadSanitizer: thread leak" warning |
| from "gcc -fsanitize=thread". */ |
| ASSERT (pthread_join (killer_thread, NULL) == 0); |
| |
| return 0; |
| } |
| |
| #else |
| |
| int |
| main () |
| { |
| fputs ("Skipping test: POSIX threads not enabled\n", stderr); |
| return 77; |
| } |
| |
| #endif |