boost/fiber/detail/config.hpp

   1
   2 //          Copyright Oliver Kowalke 2013.
   3 // Distributed under the Boost Software License, Version 1.0.
   4 //    (See accompanying file LICENSE_1_0.txt or copy at
   5 //          http://www.boost.org/LICENSE_1_0.txt)
   6
   7 #ifndef BOOST_FIBERS_DETAIL_CONFIG_H
   8 #define BOOST_FIBERS_DETAIL_CONFIG_H
   9
  10 #include <cstddef>
  11
  12 #include <boost/config.hpp>
  13 #include <boost/predef.h>
  14 #include <boost/detail/workaround.hpp>
  15
  16 #ifdef BOOST_FIBERS_DECL
  17 # undef BOOST_FIBERS_DECL
  18 #endif
  19
  20 #if (defined(BOOST_ALL_DYN_LINK) || defined(BOOST_FIBERS_DYN_LINK) ) && ! defined(BOOST_FIBERS_STATIC_LINK)
  21 # if defined(BOOST_FIBERS_SOURCE)
  22 #  define BOOST_FIBERS_DECL BOOST_SYMBOL_EXPORT
  23 #  define BOOST_FIBERS_BUILD_DLL
  24 # else
  25 #  define BOOST_FIBERS_DECL BOOST_SYMBOL_IMPORT
  26 # endif
  27 #endif
  28
  29 #if ! defined(BOOST_FIBERS_DECL)
  30 # define BOOST_FIBERS_DECL
  31 #endif
  32
  33 #if ! defined(BOOST_FIBERS_SOURCE) && ! defined(BOOST_ALL_NO_LIB) && ! defined(BOOST_FIBERS_NO_LIB)
  34 # define BOOST_LIB_NAME boost_fiber
  35 # if defined(BOOST_ALL_DYN_LINK) || defined(BOOST_FIBERS_DYN_LINK)
  36 #  define BOOST_DYN_LINK
  37 # endif
  38 # include <boost/config/auto_link.hpp>
  39 #endif
  40
  41 #if BOOST_OS_LINUX || BOOST_OS_WINDOWS
  42 # define BOOST_FIBERS_HAS_FUTEX
  43 #endif
  44
  45 #if (!defined(BOOST_FIBERS_HAS_FUTEX) && \
  46     (defined(BOOST_FIBERS_SPINLOCK_TTAS_FUTEX) || defined(BOOST_FIBERS_SPINLOCK_TTAS_ADAPTIVE_FUTEX)))
  47 # error "futex not supported on this platform"
  48 #endif
  49
  50 #if !defined(BOOST_FIBERS_SPIN_MAX_COLLISIONS)
  51 # define BOOST_FIBERS_SPIN_MAX_COLLISIONS 16
  52 #endif
  53
  54 #if !defined(BOOST_FIBERS_SPIN_MAX_TESTS)
  55 # define BOOST_FIBERS_SPIN_MAX_TESTS 500
  56 #endif
  57
  58 // modern architectures have cachelines with 64byte length
  59 // ARM Cortex-A15 32/64byte, Cortex-A9 16/32/64bytes
  60 // MIPS 74K: 32byte, 4KEc: 16byte
  61 // ist shoudl be safe to use 64byte for all
  62 static constexpr std::size_t cache_alignment{ 64 };
  63 static constexpr std::size_t cacheline_length{ 64 };
  64
  65 #endif // BOOST_FIBERS_DETAIL_CONFIG_H