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https://github.com/isar/libmdbx.git
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mdbx: использование __has_c_attribute() и __has_cxx_attribute(), добавление __has_C23_or_CXX_attribute().
This commit is contained in:
Леонид Юрьев (Leonid Yuriev)
85
mdbx.h
85
mdbx.h
@@ -189,10 +189,33 @@ typedef mode_t mdbx_mode_t;
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#define __has_attribute(x) (0)
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#endif /* __has_attribute */
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#ifndef __has_c_attribute
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#define __has_c_attribute(x) (0)
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#endif /* __has_c_attribute */
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#ifndef __has_cpp_attribute
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#define __has_cpp_attribute(x) 0
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#endif /* __has_cpp_attribute */
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#ifndef __has_CXX_attribute
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#if defined(__cplusplus) && \
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(!defined(_MSC_VER) || defined(__clang__) || _MSC_VER >= 1942)
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#define __has_CXX_attribute(x) __has_cpp_attribute(x)
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#else
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#define __has_CXX_attribute(x) 0
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#endif
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#endif /* __has_CXX_attribute */
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#ifndef __has_C23_or_CXX_attribute
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#if defined(__cplusplus)
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#define __has_C23_or_CXX_attribute(x) __has_CXX_attribute(x)
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#elif defined(__STDC_VERSION__) && __STDC_VERSION__ > 202311L
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#define __has_C23_or_CXX_attribute(x) __has_c_attribute(x)
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#else
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#define __has_C23_or_CXX_attribute(x) 0
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#endif
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#endif /* __has_C23_or_CXX_attribute */
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#ifndef __has_feature
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#define __has_feature(x) (0)
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#endif /* __has_feature */
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@@ -213,15 +236,12 @@ typedef mode_t mdbx_mode_t;
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* These functions should be declared with the attribute pure. */
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#if defined(DOXYGEN)
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#define MDBX_PURE_FUNCTION [[gnu::pure]]
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#elif (defined(__GNUC__) || __has_attribute(__pure__)) && \
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(!defined(__clang__) /* https://bugs.llvm.org/show_bug.cgi?id=43275 */ \
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|| !defined(__cplusplus) || !__has_feature(cxx_exceptions))
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#define MDBX_PURE_FUNCTION __attribute__((__pure__))
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#elif defined(_MSC_VER) && !defined(__clang__) && _MSC_VER >= 1920
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#define MDBX_PURE_FUNCTION
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#elif defined(__cplusplus) && __has_cpp_attribute(gnu::pure) && \
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(!defined(__clang__) || !__has_feature(cxx_exceptions))
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#elif __has_C23_or_CXX_attribute(gnu::pure)
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#define MDBX_PURE_FUNCTION [[gnu::pure]]
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#elif (defined(__GNUC__) || __has_attribute(__pure__)) && \
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(!defined(__clang__) /* https://bugs.llvm.org/show_bug.cgi?id=43275 */ || \
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!defined(__cplusplus) || !__has_feature(cxx_exceptions))
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#define MDBX_PURE_FUNCTION __attribute__((__pure__))
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#else
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#define MDBX_PURE_FUNCTION
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#endif /* MDBX_PURE_FUNCTION */
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@@ -231,22 +251,16 @@ typedef mode_t mdbx_mode_t;
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* that is compatible to CLANG and proposed [[pure]]. */
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#if defined(DOXYGEN)
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#define MDBX_NOTHROW_PURE_FUNCTION [[gnu::pure, gnu::nothrow]]
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#elif defined(__GNUC__) || \
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(__has_attribute(__pure__) && __has_attribute(__nothrow__))
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#define MDBX_NOTHROW_PURE_FUNCTION __attribute__((__pure__, __nothrow__))
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#elif defined(_MSC_VER) && !defined(__clang__) && _MSC_VER >= 1920
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#if __has_cpp_attribute(pure)
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#define MDBX_NOTHROW_PURE_FUNCTION [[pure]]
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#else
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#define MDBX_NOTHROW_PURE_FUNCTION
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#endif
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#elif defined(__cplusplus) && __has_cpp_attribute(gnu::pure)
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#if __has_cpp_attribute(gnu::nothrow)
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#elif __has_C23_or_CXX_attribute(gnu::pure)
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#if __has_C23_or_CXX_attribute(gnu::nothrow)
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#define MDBX_NOTHROW_PURE_FUNCTION [[gnu::pure, gnu::nothrow]]
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#else
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#define MDBX_NOTHROW_PURE_FUNCTION [[gnu::pure]]
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#endif
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#elif defined(__cplusplus) && __has_cpp_attribute(pure)
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#elif defined(__GNUC__) || \
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(__has_attribute(__pure__) && __has_attribute(__nothrow__))
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#define MDBX_NOTHROW_PURE_FUNCTION __attribute__((__pure__, __nothrow__))
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#elif __has_CXX_attribute(pure)
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#define MDBX_NOTHROW_PURE_FUNCTION [[pure]]
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#else
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#define MDBX_NOTHROW_PURE_FUNCTION
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@@ -264,15 +278,12 @@ typedef mode_t mdbx_mode_t;
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* It does not make sense for a const function to return void. */
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#if defined(DOXYGEN)
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#define MDBX_CONST_FUNCTION [[gnu::const]]
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#elif (defined(__GNUC__) || __has_attribute(__pure__)) && \
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(!defined(__clang__) /* https://bugs.llvm.org/show_bug.cgi?id=43275 */ \
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|| !defined(__cplusplus) || !__has_feature(cxx_exceptions))
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#define MDBX_CONST_FUNCTION __attribute__((__const__))
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#elif defined(_MSC_VER) && !defined(__clang__) && _MSC_VER >= 1920
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#define MDBX_CONST_FUNCTION MDBX_PURE_FUNCTION
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#elif defined(__cplusplus) && __has_cpp_attribute(gnu::const) && \
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(!defined(__clang__) || !__has_feature(cxx_exceptions))
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#elif __has_C23_or_CXX_attribute(gnu::const)
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#define MDBX_CONST_FUNCTION [[gnu::const]]
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#elif (defined(__GNUC__) || __has_attribute(__const__)) && \
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(!defined(__clang__) /* https://bugs.llvm.org/show_bug.cgi?id=43275 */ || \
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!defined(__cplusplus) || !__has_feature(cxx_exceptions))
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#define MDBX_CONST_FUNCTION __attribute__((__const__))
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#else
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#define MDBX_CONST_FUNCTION MDBX_PURE_FUNCTION
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#endif /* MDBX_CONST_FUNCTION */
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@@ -282,18 +293,16 @@ typedef mode_t mdbx_mode_t;
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* that is compatible to CLANG and future [[const]]. */
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#if defined(DOXYGEN)
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#define MDBX_NOTHROW_CONST_FUNCTION [[gnu::const, gnu::nothrow]]
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#elif __has_C23_or_CXX_attribute(gnu::const)
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#if __has_C23_or_CXX_attribute(gnu::nothrow)
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#define MDBX_NOTHROW_CONST_FUNCTION [[gnu::const, gnu::nothrow]]
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#else
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#define MDBX_NOTHROW_CONST_FUNCTION [[gnu::const]]
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#endif
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#elif defined(__GNUC__) || \
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(__has_attribute(__const__) && __has_attribute(__nothrow__))
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#define MDBX_NOTHROW_CONST_FUNCTION __attribute__((__const__, __nothrow__))
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#elif defined(_MSC_VER) && !defined(__clang__) && _MSC_VER >= 1920
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#define MDBX_NOTHROW_CONST_FUNCTION MDBX_NOTHROW_PURE_FUNCTION
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#elif defined(__cplusplus) && __has_cpp_attribute(gnu::const)
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#if __has_cpp_attribute(gnu::nothrow)
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#define MDBX_NOTHROW_PURE_FUNCTION [[gnu::const, gnu::nothrow]]
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#else
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#define MDBX_NOTHROW_PURE_FUNCTION [[gnu::const]]
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#endif
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#elif defined(__cplusplus) && __has_cpp_attribute(const)
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#elif __has_CXX_attribute(const)
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#define MDBX_NOTHROW_CONST_FUNCTION [[const]]
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#else
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#define MDBX_NOTHROW_CONST_FUNCTION MDBX_NOTHROW_PURE_FUNCTION
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@@ -3848,7 +3857,7 @@ mdbx_env_get_maxvalsize_ex(const MDBX_env *env, MDBX_db_flags_t flags);
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/** \deprecated Please use \ref mdbx_env_get_maxkeysize_ex()
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* and/or \ref mdbx_env_get_maxvalsize_ex()
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* \ingroup c_statinfo */
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MDBX_DEPRECATED MDBX_NOTHROW_PURE_FUNCTION LIBMDBX_API int
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MDBX_NOTHROW_PURE_FUNCTION MDBX_DEPRECATED LIBMDBX_API int
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mdbx_env_get_maxkeysize(const MDBX_env *env);
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/** \brief Returns maximal size of key-value pair to fit in a single page
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