htl/tests/test-16.c

   1 /* Test pthread_kill.c.
   2    Copyright (C) 2000-2021 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library;  if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #define _GNU_SOURCE
  20
  21 #include <pthread.h>
  22 #include <signal.h>
  23 #include <stdio.h>
  24 #include <assert.h>
  25 #include <error.h>
  26 #include <errno.h>
  27 #include <hurd/signal.h>
  28
  29 pthread_t testthread;
  30
  31 int i;
  32
  33 void *
  34 test (void *arg)
  35 {
  36   error_t err;
  37
  38   printf ("test: %d\n", pthread_self ());
  39
  40   err = pthread_kill (pthread_self (), SIGINFO);
  41   if (err)
  42     error (1, err, "pthread_kill");
  43
  44   /* To avoid using condition variables in a signal handler.  */
  45   while (i == 0)
  46     sched_yield ();
  47
  48   return 0;
  49 }
  50
  51 static void
  52 handler (int sig)
  53 {
  54   assert (pthread_equal (pthread_self (), testthread));
  55   printf ("handler: %d\n", pthread_self ());
  56   i = 1;
  57 }
  58
  59 int
  60 main (int argc, char **argv)
  61 {
  62   error_t err;
  63   struct sigaction sa;
  64   void *ret;
  65
  66   printf ("main: %d\n", pthread_self ());
  67
  68   sa.sa_handler = handler;
  69   sa.sa_mask = 0;
  70   sa.sa_flags = 0;
  71
  72   err = sigaction (SIGINFO, &sa, 0);
  73   if (err)
  74     error (1, err, "sigaction");
  75
  76   err = pthread_create (&testthread, 0, test, 0);
  77   if (err)
  78     error (1, err, "pthread_create");
  79
  80   err = pthread_join (testthread, &ret);
  81   if (err)
  82     error (1, err, "pthread_join");
  83
  84   assert (ret == 0);
  85
  86   return 0;
  87 }