/* Block a thread.  Viengoos version.
   Copyright (C) 2008 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 Library General Public License as
   published by the Free Software Foundation; either version 2 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include <pt-internal.h>

#include <hurd/stddef.h>
#include <viengoos/futex.h>

/* Block THREAD.  */
void
__pthread_block (struct __pthread *thread)
{
  assert (thread->lock_message_buffer);

  struct hurd_message_buffer *mb = thread->lock_message_buffer;
#ifndef NDEBUG
  /* Try to detect recursive locks, which we don't handle.  */
  thread->lock_message_buffer = NULL;
#endif

  futex_wait_using (mb, &thread->threadid, thread->threadid);

#ifndef NDEBUG
  thread->lock_message_buffer = mb;
#endif
}