78 lines
1.8 KiB
C++
78 lines
1.8 KiB
C++
#pragma once
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#if defined(_MSC_VER) && !defined(__clang__)
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# define ALWAYSINLINE __forceinline
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# define NOINLINE __declspec(noinline)
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# define likely(x) !!(x)
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# define unlikely(x) !!(x)
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# define SNMALLOC_SLOW_PATH NOINLINE
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# define SNMALLOC_FAST_PATH ALWAYSINLINE
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# define SNMALLOC_PURE
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#else
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# define likely(x) __builtin_expect(!!(x), 1)
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# define unlikely(x) __builtin_expect(!!(x), 0)
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# define ALWAYSINLINE __attribute__((always_inline))
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# define NOINLINE __attribute__((noinline))
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# define SNMALLOC_SLOW_PATH NOINLINE
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# define SNMALLOC_FAST_PATH inline ALWAYSINLINE
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# define SNMALLOC_PURE __attribute__((const))
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#endif
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#if !defined(__clang__) && defined(__GNUC__)
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# define GCC_NOT_CLANG
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#endif
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#ifdef GCC_NOT_CLANG
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# if __GNUC__ >= 8
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# define GCC_VERSION_EIGHT_PLUS
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# endif
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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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#define UNUSED(x) ((void)(x))
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namespace snmalloc
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{
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// Forwards reference so that the platform can define how to handle errors.
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void error(const char* const str);
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} // namespace snmalloc
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#define TOSTRING(expr) TOSTRING2(expr)
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#define TOSTRING2(expr) #expr
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#ifdef NDEBUG
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# define SNMALLOC_ASSERT(expr) \
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{}
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#else
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# define SNMALLOC_ASSERT(expr) \
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{ \
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if (!(expr)) \
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{ \
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snmalloc::error("assert fail: " #expr " in " __FILE__ \
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" on " TOSTRING(__LINE__)); \
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} \
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}
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#endif
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#ifndef NDEBUG
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# define SNMALLOC_ASSUME(x) SNMALLOC_ASSERT(x)
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#else
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# if __has_builtin(__builtin_assume)
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# define SNMALLOC_ASSUME(x) __builtin_assume((x))
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# elif defined(_MSC_VER)
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# define SNMALLOC_ASSUME(x) __assume((x));
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# elif defined(__GNUC__)
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# define SNMALLOC_ASSUME(x) \
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if (!(x)) \
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__builtin_unreachable();
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# else
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# define SNMALLOC_ASSUME(x) \
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do \
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{ \
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} while (0)
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# endif
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#endif
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