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// Copyright (c) Meta Platforms, Inc. and affiliates.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
#pragma once
#include <cinttypes>
#include "rocksdb/compression_type.h"
#include "rocksdb/slice.h"
#include "rocksdb/status.h"
#include "util/autovector.h"
namespace ROCKSDB_NAMESPACE {
// A read Blob request structure for use in BlobSource::MultiGetBlob and
// BlobFileReader::MultiGetBlob.
struct BlobReadRequest {
// User key to lookup the paired blob
const Slice* user_key = nullptr;
// File offset in bytes
uint64_t offset = 0;
// Length to read in bytes
size_t len = 0;
// Blob compression type
CompressionType compression = kNoCompression;
// Output parameter set by MultiGetBlob() to point to the data buffer, and
// the number of valid bytes
PinnableSlice* result = nullptr;
// Status of read
Status* status = nullptr;
BlobReadRequest(const Slice& _user_key, uint64_t _offset, size_t _len,
CompressionType _compression, PinnableSlice* _result,
Status* _status)
: user_key(&_user_key),
offset(_offset),
len(_len),
compression(_compression),
result(_result),
status(_status) {}
BlobReadRequest() = default;
BlobReadRequest(const BlobReadRequest& other) = default;
BlobReadRequest& operator=(const BlobReadRequest& other) = default;
};
using BlobFileReadRequests =
std::tuple<uint64_t /* file_number */, uint64_t /* file_size */,
autovector<BlobReadRequest>>;
} // namespace ROCKSDB_NAMESPACE
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