/* force-elision.h: Automatic enabling of elision for mutexes
   Copyright (C) 2013-2014 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/>.  */

/* Check for elision on this lock without upgrading.  */
#define DO_ELISION(m)							\
  (__pthread_force_elision						\
   && (m->__data.__kind & PTHREAD_MUTEX_NO_ELISION_NP) == 0)		\

/* Automatically enable elision for existing user lock kinds.  */
#define FORCE_ELISION(m, s)						\
  if (__pthread_force_elision						\
      && (m->__data.__kind & PTHREAD_MUTEX_ELISION_FLAGS_NP) == 0)	\
    {									\
      mutex->__data.__kind |= PTHREAD_MUTEX_ELISION_NP;			\
      s;								\
    }