boost/lockfree/detail/prefix.hpp

   1 //  Copyright (C) 2007, 2008, 2009 Tim Blechmann & Thomas Grill
   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 //  Disclaimer: Not a Boost library.
   8
   9 #ifndef BOOST_LOCKFREE_PREFIX_HPP_INCLUDED
  10 #define BOOST_LOCKFREE_PREFIX_HPP_INCLUDED
  11
  12 #include <cassert>
  13
  14
  15 #ifdef _WIN32
  16     #include <windows.h>
  17 #endif
  18
  19 #ifdef __APPLE__
  20     #include <libkern/OSAtomic.h>
  21 #endif
  22
  23 #define BOOST_LOCKFREE_CACHELINE_BYTES 64
  24
  25 #ifdef _MSC_VER
  26 // \note: Must use /Oi option for VC++ to enable intrinsics
  27     extern "C" {
  28         void __cdecl _ReadWriteBarrier();
  29         LONG __cdecl _InterlockedCompareExchange(LONG volatile* Dest,LONG Exchange, LONG Comp);
  30     }
  31
  32 #define BOOST_LOCKFREE_CACHELINE_ALIGNMENT __declspec(align(BOOST_LOCKFREE_CACHELINE_BYTES))
  33
  34 #if defined(_M_IX86)
  35     #define BOOST_LOCKFREE_DCAS_ALIGNMENT
  36 #elif defined(_M_X64) || defined(_M_IA64)
  37     #define BOOST_LOCKFREE_PTR_COMPRESSION 1
  38     #define BOOST_LOCKFREE_DCAS_ALIGNMENT __declspec(align(16))
  39 #endif
  40
  41 #endif /* _MSC_VER */
  42
  43 #ifdef __GNUC__
  44
  45 #define BOOST_LOCKFREE_CACHELINE_ALIGNMENT __attribute__((aligned(BOOST_LOCKFREE_CACHELINE_BYTES)))
  46
  47 #ifdef __i386__
  48     #define BOOST_LOCKFREE_DCAS_ALIGNMENT
  49 #elif defined(__ppc__)
  50     #define BOOST_LOCKFREE_DCAS_ALIGNMENT
  51 #elif defined(__x86_64__)
  52     #define BOOST_LOCKFREE_PTR_COMPRESSION 1
  53     #define BOOST_LOCKFREE_DCAS_ALIGNMENT __attribute__((aligned(16)))
  54 #elif defined(__alpha__)
  55     #define BOOST_LOCKFREE_PTR_COMPRESSION 1
  56 #endif
  57
  58
  59 #if (__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 2))
  60 #include <ext/atomicity.h>
  61 #else
  62 #include <bits/atomicity.h>
  63 #endif
  64
  65
  66 #endif /* __GNUC__ */
  67
  68
  69 #ifdef USE_ATOMIC_OPS
  70     #define AO_REQUIRE_CAS
  71     #define AO_USE_PENTIUM4_INSTRS
  72
  73     extern "C" {
  74         #include "../libatomic_ops/src/atomic_ops.h"
  75     }
  76 #endif
  77
  78
  79 #endif /* BOOST_LOCKFREE_PREFIX_HPP_INCLUDED */