ceph/src/boost/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 #if defined(__s390__) || defined(__s390x__)
  17     #define BOOST_LOCKFREE_CACHELINE_BYTES 256
  18 #elif defined(powerpc) || defined(__powerpc__) || defined(__ppc__)
  19     #define BOOST_LOCKFREE_CACHELINE_BYTES 128
  20 #else
  21     #define BOOST_LOCKFREE_CACHELINE_BYTES 64
  22 #endif
  23
  24 #include <boost/predef.h>
  25
  26 #if BOOST_ARCH_X86_64 || ( (BOOST_ARCH_ARM >= BOOST_VERSION_NUMBER(8,0,0)) && !BOOST_PLAT_ANDROID )
  27 #define BOOST_LOCKFREE_PTR_COMPRESSION 1
  28 #endif
  29
  30 #endif /* BOOST_LOCKFREE_PREFIX_HPP_INCLUDED */