mirror of
https://github.com/simdjson/simdjson
synced 2026-06-08 17:27:07 +00:00
John Keiser
88 lines
2.3 KiB
C++
88 lines
2.3 KiB
C++
#ifndef SIMDJSON_COMMON_DEFS_H
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#define SIMDJSON_COMMON_DEFS_H
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#include <cassert>
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#include "simdjson/portability.h"
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namespace simdjson {
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/** The maximum document size supported by simdjson. */
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constexpr size_t SIMDJSON_MAXSIZE_BYTES = 0xFFFFFFFF;
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/**
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* The amount of padding needed in a buffer to parse JSON.
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*
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* the input buf should be readable up to buf + SIMDJSON_PADDING
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* this is a stopgap; there should be a better description of the
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* main loop and its behavior that abstracts over this
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* See https://github.com/lemire/simdjson/issues/174
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*/
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constexpr size_t SIMDJSON_PADDING = 32;
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/**
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* By default, simdjson supports this many nested objects and arrays.
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*
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* This is the default for document::parser::max_depth().
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*/
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constexpr size_t DEFAULT_MAX_DEPTH = 1024;
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} // namespace simdjson
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#if defined(__GNUC__)
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// Marks a block with a name so that MCA analysis can see it.
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#define BEGIN_DEBUG_BLOCK(name) __asm volatile("# LLVM-MCA-BEGIN " #name);
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#define END_DEBUG_BLOCK(name) __asm volatile("# LLVM-MCA-END " #name);
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#define DEBUG_BLOCK(name, block) BEGIN_DEBUG_BLOCK(name); block; END_DEBUG_BLOCK(name);
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#else
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#define BEGIN_DEBUG_BLOCK(name)
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#define END_DEBUG_BLOCK(name)
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#define DEBUG_BLOCK(name, block)
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#endif
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#if !defined(_MSC_VER) && !defined(SIMDJSON_NO_COMPUTED_GOTO)
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// Implemented using Labels as Values which works in GCC and CLANG (and maybe
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// also in Intel's compiler), but won't work in MSVC.
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#define SIMDJSON_USE_COMPUTED_GOTO
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#endif
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// Align to N-byte boundary
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#define ROUNDUP_N(a, n) (((a) + ((n)-1)) & ~((n)-1))
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#define ROUNDDOWN_N(a, n) ((a) & ~((n)-1))
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#define ISALIGNED_N(ptr, n) (((uintptr_t)(ptr) & ((n)-1)) == 0)
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#ifdef _MSC_VER
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#define really_inline __forceinline
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#define never_inline __declspec(noinline)
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#define UNUSED
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#define WARN_UNUSED
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#ifndef likely
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#define likely(x) x
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#endif
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#ifndef unlikely
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#define unlikely(x) x
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#endif
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#else
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#define really_inline inline __attribute__((always_inline, unused))
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#define never_inline inline __attribute__((noinline, unused))
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#define UNUSED __attribute__((unused))
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#define WARN_UNUSED __attribute__((warn_unused_result))
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#ifndef likely
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#define likely(x) __builtin_expect(!!(x), 1)
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#endif
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#ifndef unlikely
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#define unlikely(x) __builtin_expect(!!(x), 0)
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#endif
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#endif // MSC_VER
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#endif // SIMDJSON_COMMON_DEFS_H
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