8a89f6601d
Implemented untested UniqueOrderedIndex. Introduced TypeGroupEdge/Vertex into database. Added Index capabilityes to PropertyFamily. Added method for adding index. Added method for removing index.
45 lines
935 B
C++
45 lines
935 B
C++
#pragma once
|
|
|
|
#include <algorithm>
|
|
#include <vector>
|
|
|
|
namespace tx
|
|
{
|
|
|
|
template <class id_t>
|
|
class Snapshot
|
|
{
|
|
public:
|
|
Snapshot() = default;
|
|
|
|
Snapshot(std::vector<id_t> active) : active(std::move(active)) {}
|
|
|
|
Snapshot(const Snapshot &other) { active = other.active; }
|
|
|
|
Snapshot(Snapshot &&other) { active = std::move(other.active); }
|
|
|
|
bool is_active(id_t xid) const
|
|
{
|
|
return std::binary_search(active.begin(), active.end(), xid);
|
|
}
|
|
|
|
void insert(const id_t &id) { active.push_back(id); }
|
|
|
|
void remove(const id_t &id)
|
|
{
|
|
// remove transaction from the active transactions list
|
|
auto last = std::remove(active.begin(), active.end(), id);
|
|
active.erase(last, active.end());
|
|
}
|
|
|
|
const id_t &front() { return active.front(); }
|
|
|
|
const id_t &back() { return active.back(); }
|
|
|
|
size_t size() { return active.size(); }
|
|
|
|
private:
|
|
std::vector<id_t> active;
|
|
};
|
|
}
|