sysdeps/pthread/tst-cancel28.c

   1 /* Check if the thread created by POSIX timer using SIGEV_THREAD is
   2    cancellable.
   3    Copyright (C) 2020-2022 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>