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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:nil -*-
// vim: ts=8 sw=2 smarttab
#pragma once
#include <algorithm>
#include <cstring>
#include <limits>
#include <memory>
#include <string>
#include "crimson/common/errorator.h"
#include "crimson/os/seastore/cached_extent.h"
#include "crimson/os/seastore/seastore_types.h"
#include "crimson/os/seastore/transaction.h"
namespace crimson::os::seastore::onode {
using crimson::os::seastore::Transaction;
using crimson::os::seastore::TransactionRef;
using crimson::os::seastore::make_transaction;
using crimson::os::seastore::laddr_t;
using crimson::os::seastore::L_ADDR_MIN;
using crimson::os::seastore::L_ADDR_NULL;
using crimson::os::seastore::extent_len_t;
class DeltaRecorder;
class NodeExtent;
class NodeExtentManager;
class RootNodeTracker;
using DeltaRecorderURef = std::unique_ptr<DeltaRecorder>;
using NodeExtentRef = crimson::os::seastore::TCachedExtentRef<NodeExtent>;
using NodeExtentManagerURef = std::unique_ptr<NodeExtentManager>;
using RootNodeTrackerURef = std::unique_ptr<RootNodeTracker>;
struct context_t {
NodeExtentManager& nm;
Transaction& t;
};
class LeafNodeImpl;
class InternalNodeImpl;
class NodeImpl;
using LeafNodeImplURef = std::unique_ptr<LeafNodeImpl>;
using InternalNodeImplURef = std::unique_ptr<InternalNodeImpl>;
using NodeImplURef = std::unique_ptr<NodeImpl>;
using level_t = uint8_t;
// a type only to index within a node, 32 bits should be enough
using index_t = uint32_t;
constexpr auto INDEX_END = std::numeric_limits<index_t>::max();
constexpr auto INDEX_LAST = INDEX_END - 0x4;
constexpr auto INDEX_UPPER_BOUND = INDEX_END - 0x8;
inline bool is_valid_index(index_t index) { return index < INDEX_UPPER_BOUND; }
// TODO: decide by NODE_BLOCK_SIZE
using node_offset_t = uint16_t;
constexpr node_offset_t DISK_BLOCK_SIZE = 1u << 12;
constexpr node_offset_t NODE_BLOCK_SIZE = DISK_BLOCK_SIZE * 1u;
enum class MatchKindBS : int8_t { NE = -1, EQ = 0 };
enum class MatchKindCMP : int8_t { LT = -1, EQ = 0, GT };
inline MatchKindCMP toMatchKindCMP(int value) {
if (value > 0) {
return MatchKindCMP::GT;
} else if (value < 0) {
return MatchKindCMP::LT;
} else {
return MatchKindCMP::EQ;
}
}
template <typename Type>
MatchKindCMP toMatchKindCMP(const Type& l, const Type& r) {
int match = l - r;
return toMatchKindCMP(match);
}
inline MatchKindCMP toMatchKindCMP(
std::string_view l, std::string_view r) {
return toMatchKindCMP(l.compare(r));
}
inline MatchKindCMP reverse(MatchKindCMP cmp) {
if (cmp == MatchKindCMP::LT) {
return MatchKindCMP::GT;
} else if (cmp == MatchKindCMP::GT) {
return MatchKindCMP::LT;
} else {
return cmp;
}
}
}
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