1
2// Copyright Oliver Kowalke 2014.
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_CONTEXT_DETAIL_CONFIG_H
8#define BOOST_CONTEXT_DETAIL_CONFIG_H
9
10// required for SD-6 compile-time integer sequences
11#include <utility>
12
13#include <boost/config.hpp>
14#include <boost/detail/workaround.hpp>
15
16#ifdef BOOST_CONTEXT_DECL
17# undef BOOST_CONTEXT_DECL
18#endif
19
20#if (defined(BOOST_ALL_DYN_LINK) || defined(BOOST_CONTEXT_DYN_LINK) ) && ! defined(BOOST_CONTEXT_STATIC_LINK)
21# if defined(BOOST_CONTEXT_SOURCE)
22# define BOOST_CONTEXT_DECL BOOST_SYMBOL_EXPORT
23# define BOOST_CONTEXT_BUILD_DLL
24# else
25# define BOOST_CONTEXT_DECL BOOST_SYMBOL_IMPORT
26# endif
27#endif
28
29#if ! defined(BOOST_CONTEXT_DECL)
30# define BOOST_CONTEXT_DECL
31#endif
32
33#if ! defined(BOOST_USE_UCONTEXT) && defined(__CYGWIN__)
34# define BOOST_USE_UCONTEXT
35#endif
36
37#if ! defined(BOOST_CONTEXT_SOURCE) && ! defined(BOOST_ALL_NO_LIB) && ! defined(BOOST_CONTEXT_NO_LIB)
38# define BOOST_LIB_NAME boost_context
39# if defined(BOOST_ALL_DYN_LINK) || defined(BOOST_CONTEXT_DYN_LINK)
40# define BOOST_DYN_LINK
41# endif
42# include <boost/config/auto_link.hpp>
43#endif
44
45#undef BOOST_CONTEXT_CALLDECL
46#if (defined(i386) || defined(__i386__) || defined(__i386) \
47 || defined(__i486__) || defined(__i586__) || defined(__i686__) \
48 || defined(__X86__) || defined(_X86_) || defined(__THW_INTEL__) \
49 || defined(__I86__) || defined(__INTEL__) || defined(__IA32__) \
50 || defined(_M_IX86) || defined(_I86_)) && defined(BOOST_WINDOWS)
51# define BOOST_CONTEXT_CALLDECL __cdecl
52#else
53# define BOOST_CONTEXT_CALLDECL
54#endif
55
56#if defined(BOOST_USE_SEGMENTED_STACKS)
57# if ! ( (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6) ) ) || \
58 (defined(__clang__) && (__clang_major__ > 2 || ( __clang_major__ == 2 && __clang_minor__ > 3) ) ) )
59# error "compiler does not support segmented_stack stacks"
60# endif
61# define BOOST_CONTEXT_SEGMENTS 10
62#endif
63
64
65#define BOOST_CONTEXT_NO_CXX14_INTEGER_SEQUENCE
66// use rd6 macros for std::integer_sequence
67#if defined(__cpp_lib_integer_sequence) && __cpp_lib_integer_sequence >= 201304
68# undef BOOST_CONTEXT_NO_CXX14_INTEGER_SEQUENCE
69#endif
70// workaroud: MSVC 14 does not provide macros to test for compile-time integer sequence
71#if _MSC_VER > 1800 // _MSC_VER == 1800 -> MS Visual Studio 2013
72# undef BOOST_CONTEXT_NO_INDEX_SEQUENCE
73#endif
74// workaround: Xcode clang feature detection
75#if ! defined(__cpp_lib_integer_sequence) && __cpp_lib_integer_sequence >= 201304
76# if _LIBCPP_STD_VER > 11
77# undef BOOST_CONTEXT_NO_CXX14_INTEGER_SEQUENCE
78# endif
79#endif
80
81// workaroud: MSVC 14 does support constexpr
82#if _MSC_VER > 1800 // _MSC_VER == 1800 -> MS Visual Studio 2013
83# undef BOOST_NO_CXX11_CONSTEXPR
84#endif
85
86#undef BOOST_CONTEXT_NO_CXX11
87#if defined(BOOST_NO_CXX11_AUTO_DECLARATIONS) || \
88 defined(BOOST_NO_CXX11_CONSTEXPR) || \
89 defined(BOOST_NO_CXX11_DEFAULTED_FUNCTIONS) || \
90 defined(BOOST_NO_CXX11_FINAL) || \
91 defined(BOOST_NO_CXX11_HDR_TUPLE) || \
92 defined(BOOST_NO_CXX11_NOEXCEPT) || \
93 defined(BOOST_NO_CXX11_NULLPTR) || \
94 defined(BOOST_NO_CXX11_RVALUE_REFERENCES) || \
95 defined(BOOST_NO_CXX11_TEMPLATE_ALIASES) || \
96 defined(BOOST_NO_CXX11_UNIFIED_INITIALISATION_SYNTAX) || \
97 defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) || \
98 defined(BOOST_NO_HDR_ATOMIC) || \
99 defined(BOOST_NO_HDR_TUPLE)
100# define BOOST_CONTEXT_NO_CXX11
101#endif
102
103#if ! defined(BOOST_EXECUTION_CONTEXT)
104# if defined(BOOST_USE_SEGMENTED_STACKS)
105# define BOOST_EXECUTION_CONTEXT 1
106# else
107# define BOOST_EXECUTION_CONTEXT 2
108# endif
109#endif
110
111#if ! defined(BOOST_NO_CXX11_CONSTEXPR)
112// modern architectures have cachelines with 64byte length
113// ARM Cortex-A15 32/64byte, Cortex-A9 16/32/64bytes
114// MIPS 74K: 32byte, 4KEc: 16byte
115// ist should be safe to use 64byte for all
116static constexpr std::size_t cache_alignment{ 64 };
117static constexpr std::size_t cacheline_length{ 64 };
118// lookahead size for prefetching
119static constexpr std::size_t prefetch_stride{ 4 * cacheline_length };
120#endif
121
122#if defined(__GLIBCPP__) || defined(__GLIBCXX__)
123// GNU libstdc++ 3
124# define BOOST_CONTEXT_HAS_CXXABI_H
125#endif
126
127#if defined( BOOST_CONTEXT_HAS_CXXABI_H )
128# include <cxxabi.h>
129#endif
130
131#if defined(__OpenBSD__)
132// stacks need mmap(2) with MAP_STACK
133# define BOOST_CONTEXT_USE_MAP_STACK
134#endif
135
136#endif // BOOST_CONTEXT_DETAIL_CONFIG_H
137

source code of boost/libs/context/include/boost/context/detail/config.hpp