libc/sysdeps/linux/common/bits/initspin.h

   1 /* Generic definitions for spinlock initializers.
   2    Copyright (C) 2000, 2001 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public License as
   7    published by the Free Software Foundation; either version 2.1 of the
   8    License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If
  17    not, see <http://www.gnu.org/licenses/>.  */
  18
  19 /* Initial value of a spinlock.  Most platforms should use zero,
  20    unless they only implement a "test and clear" operation instead of
  21    the usual "test and set". */
  22 #define __LT_SPINLOCK_INIT 0
  23
  24 /* Macros for lock initializers, using the above definition. */
  25 #define __LOCK_INITIALIZER { 0, __LT_SPINLOCK_INIT }
  26 #define __ALT_LOCK_INITIALIZER { 0, __LT_SPINLOCK_INIT }
  27 #define __ATOMIC_INITIALIZER { 0, __LT_SPINLOCK_INIT }