/* Cancel a thread.

   Copyright (C) 2002-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library;  if not, see

   <http://www.gnu.org/licenses/>.  */

#include <pthread.h>

#include <pt-internal.h>

#include <pthreadP.h>

static void

call_exit (void)

{

  __pthread_exit (0);

}

int

__pthread_do_cancel (struct __pthread *p)

{

  mach_port_t ktid;

  int me;

  assert (p->cancel_pending == 1);

  assert (p->cancel_state == PTHREAD_CANCEL_ENABLE);

  __pthread_mutex_unlock (&p->cancel_lock);

  ktid = __mach_thread_self ();

  me = p->kernel_thread == ktid;

  __mach_port_deallocate (__mach_task_self (), ktid);

  if (me)

    call_exit ();

  else

    {

      error_t err;

      err = __thread_suspend (p->kernel_thread);

      assert_perror (err);

      err = __thread_abort (p->kernel_thread);

      assert_perror (err);

      err = __thread_set_pcsptp (p->kernel_thread,

				 1, (void *) call_exit, 0, 0, 0, 0);

      assert_perror (err);

      err = __thread_resume (p->kernel_thread);

      assert_perror (err);

    }

  return 0;

}