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/*
* include/util/record.h
*
* Copyright (C) 2023 Douglas Rumbaugh <drumbaugh@psu.edu>
* Dong Xie <dongx@psu.edu>
*
* All rights reserved. Published under the Modified BSD License.
*
*/
#pragma once
#include <cstring>
#include <concepts>
#include "util/base.h"
namespace de {
template<typename R>
concept RecordInterface = requires(R r, R s) {
r.key;
r.value;
{ r < s } ->std::convertible_to<bool>;
{ r == s } ->std::convertible_to<bool>;
};
template<RecordInterface R>
struct WrappedRecord {
R rec;
uint32_t header;
inline void set_delete() {
header |= 2;
}
inline bool is_deleted() const {
return header & 2;
}
inline void set_tombstone(bool val=true) {
if (val) {
header |= val;
} else {
header &= 0;
}
}
inline bool is_tombstone() const {
return header & 1;
}
};
template <typename R>
concept WeightedRecordInterface = RecordInterface<R> && requires(R r) {
{r.weight} -> std::convertible_to<double>;
};
template <typename K, typename V>
struct Record {
K key;
V value;
uint32_t header = 0;
inline bool operator<(const Record& other) const {
return key < other.key || (key == other.key && value < other.value);
}
inline bool operator==(const Record& other) const {
return key == other.key && value == other.value;
}
};
template <typename K, typename V, typename W>
struct WeightedRecord {
K key;
V value;
W weight = 1;
uint32_t header = 0;
inline void set_delete() {
header |= 2;
}
inline bool is_deleted() const {
return header & 2;
}
inline void set_tombstone(bool val=true) {
if (val) {
header |= val;
} else {
header &= 0;
}
}
inline bool is_tombstone() const {
return header & 1;
}
inline int match(const WeightedRecord* other) const {
return key == other->key && value == other->value;
}
inline bool operator<(const WeightedRecord& other) const {
return key < other.key || (key == other.key && value < other.value);
}
inline bool operator==(const WeightedRecord& other) const {
return key == other.key && value == other.value;
}
};
template <RecordInterface R>
static bool memtable_record_cmp(const R& a, const R& b) {
return (a.key < b.key) || (a.key == b.key && a.value < b.value)
|| (a.key == b.key && a.value == b.value && a.header < b.header);
}
}
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