1 files changed, 105 insertions, 0 deletions
diff --git a/src/gl/tests/test-pthread_sigmask2.c b/src/gl/tests/test-pthread_sigmask2.c
new file mode 100644
index 0000000..f57fc93
--- /dev/null
+++ b/src/gl/tests/test-pthread_sigmask2.c
@@ -0,0 +1,105 @@
+/* Test of pthread_sigmask in a multi-threaded program.
+   Copyright (C) 2011-2021 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