| // Copyright (C) 2009 Tim Blechmann |
| // |
| // Distributed under the Boost Software License, Version 1.0. (See |
| // accompanying file LICENSE_1_0.txt or copy at |
| // http://www.boost.org/LICENSE_1_0.txt) |
| |
| #ifndef BOOST_LOCKFREE_PREFIX_HPP_INCLUDED |
| #define BOOST_LOCKFREE_PREFIX_HPP_INCLUDED |
| |
| /* this file defines the following macros: |
| BOOST_LOCKFREE_CACHELINE_BYTES: size of a cache line |
| BOOST_LOCKFREE_PTR_COMPRESSION: use tag/pointer compression to utilize parts |
| of the virtual address space as tag (at least 16bit) |
| BOOST_LOCKFREE_DCAS_ALIGNMENT: symbol used for aligning structs at cache line |
| boundaries |
| */ |
| |
| #define BOOST_LOCKFREE_CACHELINE_BYTES 64 |
| |
| #ifdef _MSC_VER |
| |
| #define BOOST_LOCKFREE_CACHELINE_ALIGNMENT __declspec(align(BOOST_LOCKFREE_CACHELINE_BYTES)) |
| |
| #if defined(_M_IX86) |
| #define BOOST_LOCKFREE_DCAS_ALIGNMENT |
| #elif defined(_M_X64) || defined(_M_IA64) |
| #define BOOST_LOCKFREE_PTR_COMPRESSION 1 |
| #define BOOST_LOCKFREE_DCAS_ALIGNMENT __declspec(align(16)) |
| #endif |
| |
| #endif /* _MSC_VER */ |
| |
| #ifdef __GNUC__ |
| |
| #define BOOST_LOCKFREE_CACHELINE_ALIGNMENT __attribute__((aligned(BOOST_LOCKFREE_CACHELINE_BYTES))) |
| |
| #if defined(__i386__) || defined(__ppc__) |
| #define BOOST_LOCKFREE_DCAS_ALIGNMENT |
| #elif defined(__x86_64__) |
| #define BOOST_LOCKFREE_PTR_COMPRESSION 1 |
| #define BOOST_LOCKFREE_DCAS_ALIGNMENT __attribute__((aligned(16))) |
| #elif defined(__alpha__) |
| // LATER: alpha may benefit from pointer compression. but what is the maximum size of the address space? |
| #define BOOST_LOCKFREE_DCAS_ALIGNMENT |
| #endif |
| #endif /* __GNUC__ */ |
| |
| #ifndef BOOST_LOCKFREE_DCAS_ALIGNMENT |
| #define BOOST_LOCKFREE_DCAS_ALIGNMENT /*BOOST_LOCKFREE_DCAS_ALIGNMENT*/ |
| #endif |
| |
| #ifndef BOOST_LOCKFREE_CACHELINE_ALIGNMENT |
| #define BOOST_LOCKFREE_CACHELINE_ALIGNMENT /*BOOST_LOCKFREE_CACHELINE_ALIGNMENT*/ |
| #endif |
| |
| #endif /* BOOST_LOCKFREE_PREFIX_HPP_INCLUDED */ |