sysdeps/mach/hurd/htl/pt-docancel.c

   1 /* Cancel a thread.
   2    Copyright (C) 2002-2018 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <pthread.h>
  20
  21 #include <pt-internal.h>
  22
  23 static void
  24 call_exit (void)
  25 {
  26   pthread_exit (0);
  27 }
  28
  29 int
  30 __pthread_do_cancel (struct __pthread *p)
  31 {
  32   mach_port_t ktid;
  33   int me;
  34
  35   assert (p->cancel_pending == 1);
  36   assert (p->cancel_state == PTHREAD_CANCEL_ENABLE);
  37
  38   __pthread_mutex_unlock (&p->cancel_lock);
  39
  40   ktid = __mach_thread_self ();
  41   me = p->kernel_thread == ktid;
  42   __mach_port_deallocate (__mach_task_self (), ktid);
  43
  44   if (me)
  45     call_exit ();
  46   else
  47     {
  48       error_t err;
  49
  50       err = __thread_suspend (p->kernel_thread);
  51       assert_perror (err);
  52
  53       err = __thread_abort (p->kernel_thread);
  54       assert_perror (err);
  55
  56       err = __thread_set_pcsptp (p->kernel_thread,
  57                                  1, (void *) call_exit, 0, 0, 0, 0);
  58       assert_perror (err);
  59
  60       err = __thread_resume (p->kernel_thread);
  61       assert_perror (err);
  62     }
  63
  64   return 0;
  65 }