RAII transactions

src/transaction.h

@@ -0,0 +1,46 @@
+#pragma once
+
+#include "base.h"
+
+namespace LMDBAL {
+class iStorage;
+
+class Transaction {
+    friend class Base;
+    friend class iStorage;
+public:
+    explicit Transaction();
+    explicit Transaction(Transaction&& other);
+    Transaction(const Transaction& other) = delete;
+    Transaction& operator = (const Transaction& other) = delete;
+    Transaction& operator = (Transaction&& other);
+    virtual ~Transaction();
+
+    void terminate();
+    bool isActive() const;
+
+protected:
+    Transaction(TransactionID txn, const Base* parent);
+
+protected:
+    TransactionID txn;
+    bool active;
+    const Base* parent;
+};
+
+class WriteTransaction : public Transaction {
+    friend class Base;
+public:
+    explicit WriteTransaction();
+    explicit WriteTransaction(WriteTransaction&& other);
+    WriteTransaction(const WriteTransaction& other) = delete;
+    WriteTransaction& operator = (const WriteTransaction& other) = delete;
+
+    void commit();
+    void abort();
+
+protected:
+    WriteTransaction(TransactionID txn, Base* parent);
+};
+
+}