/* C11 threads call once implementation.

   Copyright (C) 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 <stdalign.h>

#include "thrd_priv.h"

void

call_once (once_flag *flag, void (*func)(void))

{

  _Static_assert (sizeof (once_flag) == sizeof (pthread_once_t),

		  "sizeof (once_flag) != sizeof (pthread_once_t)");

  _Static_assert (alignof (once_flag) == alignof (pthread_once_t),

		  "alignof (once_flag) != alignof (pthread_once_t)");

  __pthread_once (&flag->__data, func);

}