52 lines
1.1 KiB
C++
52 lines
1.1 KiB
C++
#pragma once
|
|
|
|
#include <cstdint>
|
|
#include <cstdlib>
|
|
#include <vector>
|
|
|
|
#include "mvcc/id.hpp"
|
|
#include "storage/locking/record_lock.hpp"
|
|
#include "transactions/lock_store.hpp"
|
|
#include "transactions/snapshot.hpp"
|
|
|
|
namespace tx
|
|
{
|
|
|
|
class Engine;
|
|
|
|
class Transaction
|
|
{
|
|
friend class Engine;
|
|
|
|
public:
|
|
Transaction(const Id &id, const Snapshot<Id> &snapshot, Engine &engine);
|
|
Transaction(const Transaction &) = delete;
|
|
Transaction(Transaction &&) = delete;
|
|
|
|
// index of this transaction
|
|
const Id id;
|
|
// index of the current command in the current transaction;
|
|
uint8_t cid;
|
|
// a snapshot of currently active transactions
|
|
|
|
// Blocks until all transactions from snapshot finish. After this method,
|
|
// snapshot will be empty.
|
|
void wait_for_active();
|
|
|
|
// Return id of oldest transaction from snapshot.
|
|
Id oldest_active();
|
|
|
|
// True if id is in snapshot.
|
|
bool is_active(const Id &id) const;
|
|
void take_lock(RecordLock &lock);
|
|
void commit();
|
|
void abort();
|
|
|
|
Engine &engine;
|
|
|
|
private:
|
|
Snapshot<Id> snapshot;
|
|
LockStore<RecordLock> locks;
|
|
};
|
|
}
|