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author | qrort <qrort@yandex-team.com> | 2022-11-30 23:47:12 +0300 |
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committer | qrort <qrort@yandex-team.com> | 2022-11-30 23:47:12 +0300 |
commit | 22f8ae0e3f5d68b92aecccdf96c1d841a0334311 (patch) | |
tree | bffa27765faf54126ad44bcafa89fadecb7a73d7 /library/cpp/erasure/public.h | |
parent | 332b99e2173f0425444abb759eebcb2fafaa9209 (diff) | |
download | ydb-22f8ae0e3f5d68b92aecccdf96c1d841a0334311.tar.gz |
validate canons without yatest_common
Diffstat (limited to 'library/cpp/erasure/public.h')
-rw-r--r-- | library/cpp/erasure/public.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/library/cpp/erasure/public.h b/library/cpp/erasure/public.h new file mode 100644 index 00000000000..d5cf01297b1 --- /dev/null +++ b/library/cpp/erasure/public.h @@ -0,0 +1,57 @@ +#pragma once + +#include <util/generic/buffer.h> +#include <util/generic/yexception.h> +#include <util/memory/blob.h> +#include <util/string/cast.h> +#include <util/system/src_root.h> + +#include <vector> + +#include <bitset> + +namespace NErasure { + +//! The maximum total number of blocks our erasure codec can handle. +static constexpr int MaxTotalPartCount = 16; + +//! Max word size to use. `w` in jerasure notation +static constexpr int MaxWordSize = 8; + +//! Max threshold to generate bitmask for CanRepair indices for LRC encoding. +static constexpr int BitmaskOptimizationThreshold = 22; + +//! A vector type for holding block indexes. +using TPartIndexList = std::vector<int>; + +//! Each bit corresponds to a possible block index. +using TPartIndexSet = std::bitset<MaxTotalPartCount>; + +template <class TBlobType> +struct ICodec; + +struct TDefaultCodecTraits { + using TBlobType = TBlob; + using TMutableBlobType = TBlob; + using TBufferType = TBuffer; + + static inline TMutableBlobType AllocateBlob(size_t size) { + TBufferType buffer(size); + buffer.Resize(size); + // The buffer is cleared after this call so no use after free. + return TBlob::FromBuffer(buffer); + } + + // AllocateBuffer must fill the memory with 0. + static inline TBufferType AllocateBuffer(size_t size) { + TBufferType buffer(size); + buffer.Fill(0, size); + return buffer; + } + + static inline TBlobType FromBufferToBlob(TBufferType&& blob) { + return TBlobType::FromBuffer(blob); + } +}; + +} // namespace NErasure |