1  /* Check if the thread created by POSIX timer using SIGEV_THREAD is
       2     cancellable.
       3     Copyright (C) 2020-2023 Free Software Foundation, Inc.
       4     This file is part of the GNU C Library.
       5  
       6     The GNU C Library is free software; you can redistribute it and/or
       7     modify it under the terms of the GNU Lesser General Public
       8     License as published by the Free Software Foundation; either
       9     version 2.1 of the License, or (at your option) any later version.
      10  
      11     The GNU C Library is distributed in the hope that it will be useful,
      12     but WITHOUT ANY WARRANTY; without even the implied warranty of
      13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      14     Lesser General Public License for more details.
      15  
      16     You should have received a copy of the GNU Lesser General Public
      17     License along with the GNU C Library; if not, see
      18     <https://www.gnu.org/licenses/>.  */
      19  
      20  #include <stdio.h>
      21  #include <time.h>
      22  #include <signal.h>
      23  #include <unistd.h>
      24  #include <stdbool.h>
      25  
      26  #include <support/check.h>
      27  #include <support/test-driver.h>
      28  #include <support/xthread.h>
      29  
      30  static pthread_barrier_t barrier;
      31  static pthread_t timer_thread;
      32  
      33  static void
      34  cl (void *arg)
      35  {
      36    xpthread_barrier_wait (&barrier);
      37  }
      38  
      39  static void
      40  thread_handler (union sigval sv)
      41  {
      42    timer_thread = pthread_self ();
      43  
      44    xpthread_barrier_wait (&barrier);
      45  
      46    pthread_cleanup_push (cl, NULL);
      47    while (1)
      48      clock_nanosleep (CLOCK_REALTIME, 0, &(struct timespec) { 1, 0 }, NULL);
      49    pthread_cleanup_pop (0);
      50  }
      51  
      52  static int
      53  do_test (void)
      54  {
      55    struct sigevent sev = { 0 };
      56    sev.sigev_notify = SIGEV_THREAD;
      57    sev.sigev_notify_function = &thread_handler;
      58  
      59    timer_t timerid;
      60    TEST_COMPARE (timer_create (CLOCK_REALTIME, &sev, &timerid), 0);
      61  
      62    xpthread_barrier_init (&barrier, NULL, 2);
      63  
      64    struct itimerspec trigger = { 0 };
      65    trigger.it_value.tv_nsec = 1000000;
      66    TEST_COMPARE (timer_settime (timerid, 0, &trigger, NULL), 0);
      67  
      68    xpthread_barrier_wait (&barrier);
      69  
      70    xpthread_cancel (timer_thread);
      71  
      72    xpthread_barrier_wait (&barrier);
      73  
      74    return 0;
      75  }
      76  
      77  /* A stall in cancellation is a regression.  */
      78  #include <support/test-driver.c>