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Diffstat (limited to 'boost/atomic/detail/int_sizes.hpp')
-rw-r--r-- | boost/atomic/detail/int_sizes.hpp | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/boost/atomic/detail/int_sizes.hpp b/boost/atomic/detail/int_sizes.hpp new file mode 100644 index 0000000000..d06ed42a11 --- /dev/null +++ b/boost/atomic/detail/int_sizes.hpp @@ -0,0 +1,140 @@ +/* + * 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) + * + * Copyright (c) 2014 Andrey Semashev + */ +/*! + * \file atomic/detail/int_sizes.hpp + * + * This header defines macros for testing buitin integer type sizes + */ + +#ifndef BOOST_ATOMIC_DETAIL_INT_SIZES_HPP_INCLUDED_ +#define BOOST_ATOMIC_DETAIL_INT_SIZES_HPP_INCLUDED_ + +#include <boost/atomic/detail/config.hpp> + +#ifdef BOOST_HAS_PRAGMA_ONCE +#pragma once +#endif + +// GCC and compatible compilers define internal macros with builtin type traits +#if defined(__SIZEOF_SHORT__) +#define BOOST_ATOMIC_DETAIL_SIZEOF_SHORT __SIZEOF_SHORT__ +#endif +#if defined(__SIZEOF_INT__) +#define BOOST_ATOMIC_DETAIL_SIZEOF_INT __SIZEOF_INT__ +#endif +#if defined(__SIZEOF_LONG__) +#define BOOST_ATOMIC_DETAIL_SIZEOF_LONG __SIZEOF_LONG__ +#endif +#if defined(__SIZEOF_LONG_LONG__) +#define BOOST_ATOMIC_DETAIL_SIZEOF_LLONG __SIZEOF_LONG_LONG__ +#endif +#if defined(__SIZEOF_WCHAR_T__) +#define BOOST_ATOMIC_DETAIL_SIZEOF_WCHAR_T __SIZEOF_WCHAR_T__ +#endif +#if defined(__SIZEOF_POINTER__) +#define BOOST_ATOMIC_DETAIL_SIZEOF_POINTER __SIZEOF_POINTER__ +#elif defined(_MSC_VER) +#if defined(_M_AMD64) || defined(_M_IA64) +#define BOOST_ATOMIC_DETAIL_SIZEOF_POINTER 8 +#else +#define BOOST_ATOMIC_DETAIL_SIZEOF_POINTER 4 +#endif +#endif + +#if !defined(BOOST_ATOMIC_DETAIL_SIZEOF_SHORT) || !defined(BOOST_ATOMIC_DETAIL_SIZEOF_INT) ||\ + !defined(BOOST_ATOMIC_DETAIL_SIZEOF_LONG) || !defined(BOOST_ATOMIC_DETAIL_SIZEOF_LLONG) + +// Try to deduce sizes from limits +#include <limits.h> +#include <boost/cstdint.hpp> + +#if (USHRT_MAX + 0) == 0xff +#define BOOST_ATOMIC_DETAIL_SIZEOF_SHORT 1 +#elif (USHRT_MAX + 0) == 0xffff +#define BOOST_ATOMIC_DETAIL_SIZEOF_SHORT 2 +#elif (USHRT_MAX + 0) == 0xffffffff +#define BOOST_ATOMIC_DETAIL_SIZEOF_SHORT 4 +#elif (USHRT_MAX + 0) == UINT64_C(0xffffffffffffffff) +#define BOOST_ATOMIC_DETAIL_SIZEOF_SHORT 8 +#endif + +#if (UINT_MAX + 0) == 0xff +#define BOOST_ATOMIC_DETAIL_SIZEOF_INT 1 +#elif (UINT_MAX + 0) == 0xffff +#define BOOST_ATOMIC_DETAIL_SIZEOF_INT 2 +#elif (UINT_MAX + 0) == 0xffffffff +#define BOOST_ATOMIC_DETAIL_SIZEOF_INT 4 +#elif (UINT_MAX + 0) == UINT64_C(0xffffffffffffffff) +#define BOOST_ATOMIC_DETAIL_SIZEOF_INT 8 +#endif + +#if (ULONG_MAX + 0) == 0xff +#define BOOST_ATOMIC_DETAIL_SIZEOF_LONG 1 +#elif (ULONG_MAX + 0) == 0xffff +#define BOOST_ATOMIC_DETAIL_SIZEOF_LONG 2 +#elif (ULONG_MAX + 0) == 0xffffffff +#define BOOST_ATOMIC_DETAIL_SIZEOF_LONG 4 +#elif (ULONG_MAX + 0) == UINT64_C(0xffffffffffffffff) +#define BOOST_ATOMIC_DETAIL_SIZEOF_LONG 8 +#endif + +#if defined(__hpux) // HP-UX's value of ULONG_LONG_MAX is unusable in preprocessor expressions +#define BOOST_ATOMIC_DETAIL_SIZEOF_LLONG 8 +#else + +// The list of the non-standard macros (the ones except ULLONG_MAX) is taken from cstdint.hpp +#if defined(ULLONG_MAX) +#define BOOST_ATOMIC_DETAIL_ULLONG_MAX ULLONG_MAX +#elif defined(ULONG_LONG_MAX) +#define BOOST_ATOMIC_DETAIL_ULLONG_MAX ULONG_LONG_MAX +#elif defined(ULONGLONG_MAX) +#define BOOST_ATOMIC_DETAIL_ULLONG_MAX ULONGLONG_MAX +#elif defined(_LLONG_MAX) // strangely enough, this one seems to be holding the limit for the unsigned integer +#define BOOST_ATOMIC_DETAIL_ULLONG_MAX _LLONG_MAX +#endif + +#if (BOOST_ATOMIC_DETAIL_ULLONG_MAX + 0) == 0xff +#define BOOST_ATOMIC_DETAIL_SIZEOF_LLONG 1 +#elif (BOOST_ATOMIC_DETAIL_ULLONG_MAX + 0) == 0xffff +#define BOOST_ATOMIC_DETAIL_SIZEOF_LLONG 2 +#elif (BOOST_ATOMIC_DETAIL_ULLONG_MAX + 0) == 0xffffffff +#define BOOST_ATOMIC_DETAIL_SIZEOF_LLONG 4 +#elif (BOOST_ATOMIC_DETAIL_ULLONG_MAX + 0) == UINT64_C(0xffffffffffffffff) +#define BOOST_ATOMIC_DETAIL_SIZEOF_LLONG 8 +#endif + +#endif // defined(__hpux) + +#endif + +#if !defined(BOOST_ATOMIC_DETAIL_SIZEOF_WCHAR_T) + +#include <wchar.h> +#include <boost/cstdint.hpp> + +#if defined(_MSC_VER) && _MSC_VER <= 1310 +// MSVC 7.1 defines WCHAR_MAX to a value not suitable for constant expressions +#define BOOST_ATOMIC_DETAIL_SIZEOF_WCHAR_T 2 +#elif (WCHAR_MAX + 0) == 0xff || (WCHAR_MAX + 0) == 0x7f +#define BOOST_ATOMIC_DETAIL_SIZEOF_WCHAR_T 1 +#elif (WCHAR_MAX + 0) == 0xffff || (WCHAR_MAX + 0) == 0x7fff +#define BOOST_ATOMIC_DETAIL_SIZEOF_WCHAR_T 2 +#elif (WCHAR_MAX + 0) == 0xffffffff || (WCHAR_MAX + 0) == 0x7fffffff +#define BOOST_ATOMIC_DETAIL_SIZEOF_WCHAR_T 4 +#elif (WCHAR_MAX + 0) == UINT64_C(0xffffffffffffffff) || (WCHAR_MAX + 0) == INT64_C(0x7fffffffffffffff) +#define BOOST_ATOMIC_DETAIL_SIZEOF_WCHAR_T 8 +#endif +#endif + +#if !defined(BOOST_ATOMIC_DETAIL_SIZEOF_SHORT) || !defined(BOOST_ATOMIC_DETAIL_SIZEOF_INT) ||\ + !defined(BOOST_ATOMIC_DETAIL_SIZEOF_LONG) || !defined(BOOST_ATOMIC_DETAIL_SIZEOF_LLONG) ||\ + !defined(BOOST_ATOMIC_DETAIL_SIZEOF_WCHAR_T) +#error Boost.Atomic: Failed to determine builtin integer sizes, the target platform is not supported. Please, report to the developers. +#endif + +#endif // BOOST_ATOMIC_DETAIL_INT_SIZES_HPP_INCLUDED_ |