141 lines
5.0 KiB
Plaintext
141 lines
5.0 KiB
Plaintext
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/*
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*
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* Copyright (c) 2014 Andrey Semashev
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*/
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/*!
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* \file atomic/detail/int_sizes.hpp
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*
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* This header defines macros for testing buitin integer type sizes
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*/
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#ifndef BOOST_ATOMIC_DETAIL_INT_SIZES_HPP_INCLUDED_
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#define BOOST_ATOMIC_DETAIL_INT_SIZES_HPP_INCLUDED_
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#include <boost/atomic/detail/config.hpp>
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#ifdef BOOST_HAS_PRAGMA_ONCE
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#pragma once
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#endif
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// GCC and compatible compilers define internal macros with builtin type traits
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#if defined(__SIZEOF_SHORT__)
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#define BOOST_ATOMIC_DETAIL_SIZEOF_SHORT __SIZEOF_SHORT__
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#endif
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#if defined(__SIZEOF_INT__)
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#define BOOST_ATOMIC_DETAIL_SIZEOF_INT __SIZEOF_INT__
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#endif
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#if defined(__SIZEOF_LONG__)
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#define BOOST_ATOMIC_DETAIL_SIZEOF_LONG __SIZEOF_LONG__
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#endif
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#if defined(__SIZEOF_LONG_LONG__)
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#define BOOST_ATOMIC_DETAIL_SIZEOF_LLONG __SIZEOF_LONG_LONG__
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#endif
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#if defined(__SIZEOF_WCHAR_T__)
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#define BOOST_ATOMIC_DETAIL_SIZEOF_WCHAR_T __SIZEOF_WCHAR_T__
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#endif
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#if defined(__SIZEOF_POINTER__)
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#define BOOST_ATOMIC_DETAIL_SIZEOF_POINTER __SIZEOF_POINTER__
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#elif defined(_MSC_VER)
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#if defined(_M_AMD64) || defined(_M_IA64)
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#define BOOST_ATOMIC_DETAIL_SIZEOF_POINTER 8
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#else
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#define BOOST_ATOMIC_DETAIL_SIZEOF_POINTER 4
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#endif
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#endif
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#if !defined(BOOST_ATOMIC_DETAIL_SIZEOF_SHORT) || !defined(BOOST_ATOMIC_DETAIL_SIZEOF_INT) ||\
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!defined(BOOST_ATOMIC_DETAIL_SIZEOF_LONG) || !defined(BOOST_ATOMIC_DETAIL_SIZEOF_LLONG)
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// Try to deduce sizes from limits
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#include <limits.h>
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#include <boost/cstdint.hpp>
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#if (USHRT_MAX + 0) == 0xff
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#define BOOST_ATOMIC_DETAIL_SIZEOF_SHORT 1
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#elif (USHRT_MAX + 0) == 0xffff
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#define BOOST_ATOMIC_DETAIL_SIZEOF_SHORT 2
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#elif (USHRT_MAX + 0) == 0xffffffff
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#define BOOST_ATOMIC_DETAIL_SIZEOF_SHORT 4
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#elif (USHRT_MAX + 0) == UINT64_C(0xffffffffffffffff)
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#define BOOST_ATOMIC_DETAIL_SIZEOF_SHORT 8
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#endif
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#if (UINT_MAX + 0) == 0xff
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#define BOOST_ATOMIC_DETAIL_SIZEOF_INT 1
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#elif (UINT_MAX + 0) == 0xffff
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#define BOOST_ATOMIC_DETAIL_SIZEOF_INT 2
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#elif (UINT_MAX + 0) == 0xffffffff
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#define BOOST_ATOMIC_DETAIL_SIZEOF_INT 4
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#elif (UINT_MAX + 0) == UINT64_C(0xffffffffffffffff)
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#define BOOST_ATOMIC_DETAIL_SIZEOF_INT 8
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#endif
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#if (ULONG_MAX + 0) == 0xff
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#define BOOST_ATOMIC_DETAIL_SIZEOF_LONG 1
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#elif (ULONG_MAX + 0) == 0xffff
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#define BOOST_ATOMIC_DETAIL_SIZEOF_LONG 2
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#elif (ULONG_MAX + 0) == 0xffffffff
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#define BOOST_ATOMIC_DETAIL_SIZEOF_LONG 4
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#elif (ULONG_MAX + 0) == UINT64_C(0xffffffffffffffff)
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#define BOOST_ATOMIC_DETAIL_SIZEOF_LONG 8
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#endif
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#if defined(__hpux) // HP-UX's value of ULONG_LONG_MAX is unusable in preprocessor expressions
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#define BOOST_ATOMIC_DETAIL_SIZEOF_LLONG 8
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#else
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// The list of the non-standard macros (the ones except ULLONG_MAX) is taken from cstdint.hpp
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#if defined(ULLONG_MAX)
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#define BOOST_ATOMIC_DETAIL_ULLONG_MAX ULLONG_MAX
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#elif defined(ULONG_LONG_MAX)
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#define BOOST_ATOMIC_DETAIL_ULLONG_MAX ULONG_LONG_MAX
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#elif defined(ULONGLONG_MAX)
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#define BOOST_ATOMIC_DETAIL_ULLONG_MAX ULONGLONG_MAX
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#elif defined(_LLONG_MAX) // strangely enough, this one seems to be holding the limit for the unsigned integer
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#define BOOST_ATOMIC_DETAIL_ULLONG_MAX _LLONG_MAX
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#endif
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#if (BOOST_ATOMIC_DETAIL_ULLONG_MAX + 0) == 0xff
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#define BOOST_ATOMIC_DETAIL_SIZEOF_LLONG 1
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#elif (BOOST_ATOMIC_DETAIL_ULLONG_MAX + 0) == 0xffff
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#define BOOST_ATOMIC_DETAIL_SIZEOF_LLONG 2
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#elif (BOOST_ATOMIC_DETAIL_ULLONG_MAX + 0) == 0xffffffff
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#define BOOST_ATOMIC_DETAIL_SIZEOF_LLONG 4
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#elif (BOOST_ATOMIC_DETAIL_ULLONG_MAX + 0) == UINT64_C(0xffffffffffffffff)
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#define BOOST_ATOMIC_DETAIL_SIZEOF_LLONG 8
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#endif
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#endif // defined(__hpux)
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#endif
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#if !defined(BOOST_ATOMIC_DETAIL_SIZEOF_WCHAR_T)
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#include <wchar.h>
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#include <boost/cstdint.hpp>
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#if defined(_MSC_VER) && ( _MSC_VER <= 1310 || defined(UNDER_CE) && _MSC_VER <= 1500 )
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// MSVC 7.1 and MSVC 8 (arm) define WCHAR_MAX to a value not suitable for constant expressions
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#define BOOST_ATOMIC_DETAIL_SIZEOF_WCHAR_T 2
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#elif (WCHAR_MAX + 0) == 0xff || (WCHAR_MAX + 0) == 0x7f
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#define BOOST_ATOMIC_DETAIL_SIZEOF_WCHAR_T 1
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#elif (WCHAR_MAX + 0) == 0xffff || (WCHAR_MAX + 0) == 0x7fff
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#define BOOST_ATOMIC_DETAIL_SIZEOF_WCHAR_T 2
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#elif (WCHAR_MAX + 0) == 0xffffffff || (WCHAR_MAX + 0) == 0x7fffffff
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#define BOOST_ATOMIC_DETAIL_SIZEOF_WCHAR_T 4
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#elif (WCHAR_MAX + 0) == UINT64_C(0xffffffffffffffff) || (WCHAR_MAX + 0) == INT64_C(0x7fffffffffffffff)
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#define BOOST_ATOMIC_DETAIL_SIZEOF_WCHAR_T 8
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#endif
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#endif
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#if !defined(BOOST_ATOMIC_DETAIL_SIZEOF_SHORT) || !defined(BOOST_ATOMIC_DETAIL_SIZEOF_INT) ||\
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!defined(BOOST_ATOMIC_DETAIL_SIZEOF_LONG) || !defined(BOOST_ATOMIC_DETAIL_SIZEOF_LLONG) ||\
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!defined(BOOST_ATOMIC_DETAIL_SIZEOF_WCHAR_T)
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#error Boost.Atomic: Failed to determine builtin integer sizes, the target platform is not supported. Please, report to the developers.
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#endif
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#endif // BOOST_ATOMIC_DETAIL_INT_SIZES_HPP_INCLUDED_
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