ym_attributes.h

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#pragma once
// Setup checks for builtin features, attributes and extensions.
// See: https://clang.llvm.org/docs/LanguageExtensions.html

#ifndef __has_builtin
#define __has_builtin(x) 0
#endif

#ifndef __has_feature
#define __has_feature(x) 0
#endif

#ifndef __has_extension
#define __has_extension __has_feature
#endif

#ifndef __has_attribute
#define __has_attribute(x) 0
#endif

#if __has_attribute(always_inline)
#define YM_INLINE __attribute__((always_inline)) inline
#else
#define YM_INLINE
#endif

#if __has_attribute(noinline)
#define YM_NO_INLINE __attribute__((noinline))
#else
#define YM_NO_INLINE
#endif

#if __has_attribute(pure)
#define YM_PURE __attribute__((pure))
#else
#define YM_PURE
#endif

#define YM_RESTRICT restrict

#if __has_attribute(unused)
#define YM_UNUSED __attribute__((unused))
#else
#define YM_UNUSED
#endif

#if __has_attribute(warn_unused_result)
#define YM_NO_DISCARD __attribute__((warn_unused_result))
#else
#define YM_NO_DISCARD
#endif

// Having issues with this in release on windows.
#if __has_builtin(__builtin_expect) && !defined(WIN32)
#define YM_LIKELY(x) __builtin_expect(!!(x), 1)
#else
#define YM_LIKELY(x) (x)
#endif

// Having issues with this in release on windows.
#if __has_builtin(__builtin_expect) && !defined(WIN32)
#define YM_UNLIKELY(x) __builtin_expect(!!(x), 0)
#else
#define YM_UNLIKELY(x) (x)
#endif