mirror of
https://github.com/simdjson/simdjson
synced 2026-06-08 17:27:07 +00:00
Daniel Lemire
96 lines
2.5 KiB
C
96 lines
2.5 KiB
C
#ifndef SIMDJSON_COMMON_DEFS_H
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#define SIMDJSON_COMMON_DEFS_H
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#include "simdjson/portability.h"
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#include <cassert>
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// we support documents up to 4GB
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#define SIMDJSON_MAXSIZE_BYTES 0xFFFFFFFF
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// the input buf should be readable up to buf + SIMDJSON_PADDING
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#ifdef __AVX2__
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#define SIMDJSON_PADDING sizeof(__m256i)
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#else
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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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#define SIMDJSON_PADDING 32
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#endif
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#ifndef _MSC_VER
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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 inline
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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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// For non-Visual Studio compilers, we may assume that same-page buffer overrun is fine.
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// However, it will make it difficult to be "valgrind clean".
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//#ifndef ALLOW_SAME_PAGE_BUFFER_OVERRUN
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//#define ALLOW_SAME_PAGE_BUFFER_OVERRUN
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//#endif
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// The following is likely unnecessarily complex.
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#ifdef __SANITIZE_ADDRESS__
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// we have GCC, stuck with https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67368
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#undef ALLOW_SAME_PAGE_BUFFER_OVERRUN
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#elif defined(__has_feature)
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// we have CLANG?
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# if (__has_feature(address_sanitizer))
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#define ALLOW_SAME_PAGE_BUFFER_OVERRUN_QUALIFIER __attribute__((no_sanitize("address")))
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# endif
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#endif
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#if defined(__has_feature)
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# if (__has_feature(memory_sanitizer))
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#define LENIENT_MEM_SANITIZER __attribute__((no_sanitize("memory")))
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# endif
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#endif
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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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// if it does not apply, make it an empty macro
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#ifndef ALLOW_SAME_PAGE_BUFFER_OVERRUN_QUALIFIER
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#define ALLOW_SAME_PAGE_BUFFER_OVERRUN_QUALIFIER
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#endif
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#ifndef LENIENT_MEM_SANITIZER
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#define LENIENT_MEM_SANITIZER
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#endif
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#endif // SIMDJSON_COMMON_DEFS_H
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