/* Start thread.  Mach version.

   Copyright (C) 2000-2018 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 <assert.h>

#include <errno.h>

#include <mach.h>

#include <pt-internal.h>

/* Start THREAD.  Get the kernel thread scheduled and running.  */

int

__pthread_thread_start (struct __pthread *thread)

{

  static int do_start;

  error_t err;

  if (!do_start)

    {

      /* The main thread is already running: do nothing.  */

      assert (__pthread_total == 1);

      assert ((

		{

		  mach_port_t ktid = __mach_thread_self ();

		  int ok = thread->kernel_thread == ktid;

		  __mach_port_deallocate (__mach_task_self (),

					  thread->kernel_thread);

		  ok;

		}));

      do_start = 1;

    }

  else

    {

      err = __thread_resume (thread->kernel_thread);

      assert_perror (err);

    }

  return 0;

}