ceph/src/boost/libs/lockfree/include/boost/lockfree/detail/prefix.hpp

   1 //  Copyright (C) 2009, 2016 Tim Blechmann
   2 //
   3 //  Distributed under the Boost Software License, Version 1.0. (See
   4 //  accompanying file LICENSE_1_0.txt or copy at
   5 //  http://www.boost.org/LICENSE_1_0.txt)
   6
   7 #ifndef BOOST_LOCKFREE_PREFIX_HPP_INCLUDED
   8 #define BOOST_LOCKFREE_PREFIX_HPP_INCLUDED
   9
  10 /* this file defines the following macros:
  11    BOOST_LOCKFREE_CACHELINE_BYTES: size of a cache line
  12    BOOST_LOCKFREE_PTR_COMPRESSION: use tag/pointer compression to utilize parts
  13                                    of the virtual address space as tag (at least 16bit)
  14 */
  15
  16 #define BOOST_LOCKFREE_CACHELINE_BYTES 64
  17
  18 #include <boost/predef.h>
  19
  20 #ifdef BOOST_ARCH_X86_64
  21 #define BOOST_LOCKFREE_PTR_COMPRESSION 1
  22 #endif
  23
  24 #endif /* BOOST_LOCKFREE_PREFIX_HPP_INCLUDED */