mirror of
https://github.com/isar/libmdbx.git
synced 2024-10-30 11:29:19 +08:00
337 lines
9.4 KiB
C
337 lines
9.4 KiB
C
/*
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* Copyright 2015-2017 Leonid Yuriev <leo@yuriev.ru>
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* and other libmdbx authors: please see AUTHORS file.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted only as authorized by the OpenLDAP
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* Public License.
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*
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* A copy of this license is available in the file LICENSE in the
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* top-level directory of the distribution or, alternatively, at
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* <http://www.OpenLDAP.org/license.html>.
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*/
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#pragma once
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#ifndef __GNUC_PREREQ
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# if defined(__GNUC__) && defined(__GNUC_MINOR__)
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# define __GNUC_PREREQ(maj, min) \
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((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
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# else
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# define __GNUC_PREREQ(maj, min) (0)
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# endif
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#endif /* __GNUC_PREREQ */
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#ifndef __CLANG_PREREQ
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# ifdef __clang__
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# define __CLANG_PREREQ(maj,min) \
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((__clang_major__ << 16) + __clang_minor__ >= ((maj) << 16) + (min))
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# else
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# define __CLANG_PREREQ(maj,min) (0)
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# endif
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#endif /* __CLANG_PREREQ */
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#ifndef __GLIBC_PREREQ
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# if defined(__GLIBC__) && defined(__GLIBC_MINOR__)
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# define __GLIBC_PREREQ(maj, min) \
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((__GLIBC__ << 16) + __GLIBC_MINOR__ >= ((maj) << 16) + (min))
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# else
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# define __GLIBC_PREREQ(maj, min) (0)
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# endif
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#endif /* __GLIBC_PREREQ */
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#ifndef __has_attribute
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# define __has_attribute(x) (0)
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#endif
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#ifndef __has_feature
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# define __has_feature(x) (0)
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#endif
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#ifndef __has_extension
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# define __has_extension(x) (0)
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#endif
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#ifndef __has_builtin
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# define __has_builtin(x) (0)
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#endif
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#if __has_feature(thread_sanitizer)
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# define __SANITIZE_THREAD__ 1
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#endif
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#if __has_feature(address_sanitizer)
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# define __SANITIZE_ADDRESS__ 1
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#endif
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/*----------------------------------------------------------------------------*/
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#ifndef __extern_C
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# ifdef __cplusplus
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# define __extern_C extern "C"
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# else
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# define __extern_C
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# endif
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#endif /* __extern_C */
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#ifndef __cplusplus
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# ifndef bool
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# define bool _Bool
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# endif
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# ifndef true
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# define true (1)
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# endif
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# ifndef false
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# define false (0)
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# endif
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#endif
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#if !defined(nullptr) && !defined(__cplusplus) || (__cplusplus < 201103L && !defined(_MSC_VER))
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# define nullptr NULL
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#endif
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/*----------------------------------------------------------------------------*/
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#if !defined(__thread) && (defined(_MSC_VER) || defined(__DMC__))
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# define __thread __declspec(thread)
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#endif /* __thread */
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#ifndef __alwaysinline
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# if defined(__GNUC__) || __has_attribute(always_inline)
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# define __alwaysinline __inline __attribute__((always_inline))
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# elif defined(_MSC_VER)
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# define __alwaysinline __forceinline
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# else
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# define __alwaysinline
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# endif
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#endif /* __alwaysinline */
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#ifndef __noinline
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# if defined(__GNUC__) || __has_attribute(noinline)
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# define __noinline __attribute__((noinline))
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# elif defined(_MSC_VER)
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# define __noinline __declspec(noinline)
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# elif defined(__SUNPRO_C) || defined(__sun) || defined(sun)
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# define __noinline inline
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# elif !defined(__INTEL_COMPILER)
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# define __noinline /* FIXME ? */
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# endif
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#endif /* __noinline */
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#ifndef __must_check_result
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# if defined(__GNUC__) || __has_attribute(warn_unused_result)
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# define __must_check_result __attribute__((warn_unused_result))
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# else
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# define __must_check_result
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# endif
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#endif /* __must_check_result */
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#ifndef __deprecated
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# if defined(__GNUC__) || __has_attribute(deprecated)
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# define __deprecated __attribute__((deprecated))
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# elif defined(_MSC_VER)
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# define __deprecated __declspec(deprecated)
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# else
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# define __deprecated
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# endif
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#endif /* __deprecated */
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#ifndef __packed
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# if defined(__GNUC__) || __has_attribute(packed)
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# define __packed __attribute__((packed))
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# else
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# define __packed
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# endif
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#endif /* __packed */
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#ifndef __aligned
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# if defined(__GNUC__) || __has_attribute(aligned)
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# define __aligned(N) __attribute__((aligned(N)))
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# elif defined(_MSC_VER)
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# define __aligned(N) __declspec(align(N))
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# else
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# define __aligned(N)
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# endif
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#endif /* __aligned */
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#ifndef __noreturn
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# if defined(__GNUC__) || __has_attribute(noreturn)
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# define __noreturn __attribute__((noreturn))
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# elif defined(_MSC_VER)
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# define __noreturn __declspec(noreturn)
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# else
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# define __noreturn
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# endif
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#endif /* __noreturn */
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#ifndef __nothrow
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# if defined(__GNUC__) || __has_attribute(nothrow)
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# define __nothrow __attribute__((nothrow))
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# elif defined(_MSC_VER) && defined(__cplusplus)
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# define __nothrow __declspec(nothrow)
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# else
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# define __nothrow
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# endif
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#endif /* __nothrow */
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#ifndef __pure_function
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/* Many functions have no effects except the return value and their
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* return value depends only on the parameters and/or global variables.
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* Such a function can be subject to common subexpression elimination
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* and loop optimization just as an arithmetic operator would be.
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* These functions should be declared with the attribute pure. */
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# if defined(__GNUC__) || __has_attribute(pure)
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# define __pure_function __attribute__((pure))
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# else
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# define __pure_function
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# endif
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#endif /* __pure_function */
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#ifndef __const_function
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/* Many functions do not examine any values except their arguments,
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* and have no effects except the return value. Basically this is just
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* slightly more strict class than the PURE attribute, since function
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* is not allowed to read global memory.
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*
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* Note that a function that has pointer arguments and examines the
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* data pointed to must not be declared const. Likewise, a function
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* that calls a non-const function usually must not be const.
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* It does not make sense for a const function to return void. */
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# if defined(__GNUC__) || __has_attribute(const)
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# define __const_function __attribute__((const))
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# else
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# define __const_function
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# endif
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#endif /* __const_function */
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#ifndef __dll_hidden
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# if defined(__GNUC__) || __has_attribute(visibility)
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# define __hidden __attribute__((visibility("hidden")))
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# else
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# define __hidden
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# endif
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#endif /* __dll_hidden */
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#ifndef __optimize
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# if defined(__OPTIMIZE__)
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# if defined(__clang__) && !__has_attribute(optimize)
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# define __optimize(ops)
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# elif defined(__GNUC__) || __has_attribute(optimize)
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# define __optimize(ops) __attribute__((optimize(ops)))
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# else
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# define __optimize(ops)
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# endif
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# else
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# define __optimize(ops)
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# endif
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#endif /* __optimize */
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#ifndef __hot
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# if defined(__OPTIMIZE__)
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# if defined(__clang__) && !__has_attribute(hot)
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/* just put frequently used functions in separate section */
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# define __hot __attribute__((section("text.hot"))) __optimize("O3")
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# elif defined(__GNUC__) || __has_attribute(hot)
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# define __hot __attribute__((hot)) __optimize("O3")
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# else
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# define __hot __optimize("O3")
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# endif
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# else
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# define __hot
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# endif
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#endif /* __hot */
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#ifndef __cold
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# if defined(__OPTIMIZE__)
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# if defined(__clang__) && !__has_attribute(cold)
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/* just put infrequently used functions in separate section */
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# define __cold __attribute__((section("text.unlikely"))) __optimize("Os")
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# elif defined(__GNUC__) || __has_attribute(cold)
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# define __cold __attribute__((cold)) __optimize("Os")
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# else
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# define __cold __optimize("Os")
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# endif
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# else
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# define __cold
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# endif
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#endif /* __cold */
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#ifndef __flatten
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# if defined(__OPTIMIZE__) && (defined(__GNUC__) || __has_attribute(flatten))
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# define __flatten __attribute__((flatten))
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# else
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# define __flatten
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# endif
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#endif /* __flatten */
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#ifndef likely
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# if defined(__GNUC__) || defined(__clang__)
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# define likely(cond) __builtin_expect(!!(cond), 1)
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# else
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# define likely(x) (x)
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# endif
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#endif /* likely */
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#ifndef unlikely
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# if defined(__GNUC__) || defined(__clang__)
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# define unlikely(cond) __builtin_expect(!!(cond), 0)
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# else
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# define unlikely(x) (x)
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# endif
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#endif /* unlikely */
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/*----------------------------------------------------------------------------*/
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/* Wrapper around __func__, which is a C99 feature */
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#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
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# define mdbx_func_ __func__
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#elif (defined(__GNUC__) && __GNUC__ >= 2) || defined(__clang__) || defined(_MSC_VER)
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# define mdbx_func_ __FUNCTION__
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#else
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# define mdbx_func_ "<mdbx_unknown>"
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#endif
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/* -------------------------------------------------------------------------- */
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#if defined(HAVE_VALGRIND) || defined(USE_VALGRIND)
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/* Get debugging help from Valgrind */
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# include <valgrind/memcheck.h>
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# ifndef VALGRIND_DISABLE_ADDR_ERROR_REPORTING_IN_RANGE
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/* LY: available since Valgrind 3.10 */
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# define VALGRIND_DISABLE_ADDR_ERROR_REPORTING_IN_RANGE(a,s)
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# define VALGRIND_ENABLE_ADDR_ERROR_REPORTING_IN_RANGE(a,s)
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# endif
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#else
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# define VALGRIND_CREATE_MEMPOOL(h,r,z)
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# define VALGRIND_DESTROY_MEMPOOL(h)
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# define VALGRIND_MEMPOOL_TRIM(h,a,s)
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# define VALGRIND_MEMPOOL_ALLOC(h,a,s)
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# define VALGRIND_MEMPOOL_FREE(h,a)
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# define VALGRIND_MEMPOOL_CHANGE(h,a,b,s)
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# define VALGRIND_MAKE_MEM_NOACCESS(a,s)
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# define VALGRIND_MAKE_MEM_DEFINED(a,s)
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# define VALGRIND_MAKE_MEM_UNDEFINED(a,s)
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# define VALGRIND_DISABLE_ADDR_ERROR_REPORTING_IN_RANGE(a,s)
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# define VALGRIND_ENABLE_ADDR_ERROR_REPORTING_IN_RANGE(a,s)
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# define VALGRIND_CHECK_MEM_IS_ADDRESSABLE(a,s) (0)
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# define VALGRIND_CHECK_MEM_IS_DEFINED(a,s) (0)
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#endif /* ! USE_VALGRIND */
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#ifdef __SANITIZE_THREAD__
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# define ATTRIBUTE_NO_SANITIZE_THREAD __attribute__((no_sanitize_thread, noinline))
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#else
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# define ATTRIBUTE_NO_SANITIZE_THREAD
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#endif
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#ifdef __SANITIZE_ADDRESS__
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# include <sanitizer/asan_interface.h>
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# define ATTRIBUTE_NO_SANITIZE_ADDRESS __attribute__((no_sanitize_address, noinline))
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#else
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# define ASAN_POISON_MEMORY_REGION(addr, size) \
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((void)(addr), (void)(size))
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# define ASAN_UNPOISON_MEMORY_REGION(addr, size) \
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((void)(addr), (void)(size))
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# define ATTRIBUTE_NO_SANITIZE_ADDRESS
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#endif /* __SANITIZE_ADDRESS__ */
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