public override void ApplySlotChanges(IVisitable slotChangeTree, int slotChangeCount , Slot reservedSlot) { if (slotChangeCount > 0) { Slot transactionLogSlot = SlotLongEnoughForLog(slotChangeCount, reservedSlot) ? reservedSlot : AllocateSlot(true, slotChangeCount); StatefulBuffer buffer = new StatefulBuffer(_container.SystemTransaction(), transactionLogSlot ); buffer.WriteInt(transactionLogSlot.Length()); buffer.WriteInt(slotChangeCount); AppendSlotChanges(buffer, slotChangeTree); buffer.Write(); IRunnable commitHook = _container.CommitHook(); FlushDatabaseFile(); _container.WriteTransactionPointer(transactionLogSlot.Address()); FlushDatabaseFile(); if (WriteSlots(slotChangeTree)) { FlushDatabaseFile(); } _container.WriteTransactionPointer(0); commitHook.Run(); FlushDatabaseFile(); if (transactionLogSlot != reservedSlot) { FreeSlot(transactionLogSlot); } } FreeSlot(reservedSlot); }
public override void WriteFixedPart(LocalObjectContainer file, bool startFileLockingThread , bool shuttingDown, StatefulBuffer writer, int blockSize) { SystemData systemData = file.SystemData(); writer.Append(Signature); writer.WriteByte(Version()); writer.WriteInt((int)TimeToWrite(_timerFileLock.OpenTime(), shuttingDown)); writer.WriteLong(TimeToWrite(_timerFileLock.OpenTime(), shuttingDown)); writer.WriteLong(TimeToWrite(Runtime.CurrentTimeMillis(), shuttingDown)); writer.WriteInt(blockSize); writer.WriteInt(systemData.ClassCollectionID()); writer.WriteByte(systemData.IdSystemType()); writer.WriteInt(((FileHeaderVariablePart2)_variablePart).Address()); writer.WriteInt(((FileHeaderVariablePart2)_variablePart).Length()); writer.WriteInt(_transactionPointerAddress); writer.Write(); if (shuttingDown) { WriteVariablePart(file, true); } else { file.SyncFiles(); } if (startFileLockingThread) { file.ThreadPool().Start("db4o lock thread", _timerFileLock); } }
private void AppendPayLoad(StatefulBuffer target, Pointer4 pointer, ByteArrayBuffer payLoad) { target.WriteInt(payLoad.Length()); target.WriteInt(pointer.Id()); target.WriteInt(pointer.Address()); target.Append(payLoad._buffer); }
protected virtual void WriteTransactionPointer(Transaction systemTransaction, int transactionPointer, int address, int offset) { StatefulBuffer bytes = new StatefulBuffer(systemTransaction, address, TransactionPointerLength ); bytes.MoveForward(offset); bytes.WriteInt(transactionPointer); bytes.WriteInt(transactionPointer); // Dangerous write. // On corruption transaction pointers will not be the same and nothing will happen. bytes.Write(); }
public virtual StatefulBuffer PayLoad() { StatefulBuffer writer = new StatefulBuffer(Transaction(), Const4.MessageLength); writer.WriteInt(_msgID); return writer; }
internal static void SlotEntryToZeroes(LocalObjectContainer file, int address) { StatefulBuffer writer = new StatefulBuffer(file.SystemTransaction(), address, SlotLength ()); for (int i = 0; i < IntsInSlot; i++) { writer.WriteInt(0); } writer.WriteEncrypt(); }