public override void ApplySlotChanges(IVisitable slotChangeTree, int slotChangeCount
, Slot reservedSlot)
{
if (slotChangeCount > 0)
{
var transactionLogSlot = SlotLongEnoughForLog(slotChangeCount, reservedSlot)
? reservedSlot
: AllocateSlot(true, slotChangeCount);
var buffer = new StatefulBuffer(_container.SystemTransaction(), transactionLogSlot
);
buffer.WriteInt(transactionLogSlot.Length());
buffer.WriteInt(slotChangeCount);
AppendSlotChanges(buffer, slotChangeTree);
buffer.Write();
var 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);
}
// _key, _slot._address, _slot._length
public override object Read(ByteArrayBuffer buffer)
{
var id = buffer.ReadInt();
var slot = new Slot
(buffer.ReadInt(), buffer.ReadInt());
return new IdSlotTree(id, slot);
}
private long IdSystemUsage()
{
IIdSystem idSystem = _db.IdSystem();
long usage = 0;
while (idSystem is BTreeIdSystem)
{
IIdSystem parentIdSystem = ((IIdSystem)FieldValue(idSystem, "_parentIdSystem"));
usage += BTreeUsage(_db.SystemTransaction(), parentIdSystem, (BTree)FieldValue(idSystem
, "_bTree"), _slots);
PersistentIntegerArray persistentState = (PersistentIntegerArray)FieldValue(idSystem
, "_persistentState");
int persistentStateId = persistentState.GetID();
Db4objects.Db4o.Internal.Slots.Slot persistentStateSlot = parentIdSystem.CommittedSlot
(persistentStateId);
_slots.Add(persistentStateSlot);
usage += persistentStateSlot.Length();
idSystem = parentIdSystem;
}
if (idSystem is InMemoryIdSystem)
{
Db4objects.Db4o.Internal.Slots.Slot idSystemSlot = ((Db4objects.Db4o.Internal.Slots.Slot
)FieldValue(idSystem, "_slot"));
usage += idSystemSlot.Length();
_slots.Add(idSystemSlot);
}
return(usage);
}
/// <exception cref="Db4objects.Db4o.Ext.Db4oIOException"></exception>
private DatabaseIdentityIDAndUUID ReadDatabaseIdentityIDAndUUID
(ObjectContainerBase container, ClassMetadata classMetadata, Slot oldSlot, bool
checkClass)
{
if (DTrace.enabled)
{
DTrace.RereadOldUuid.LogLength(oldSlot.Address(), oldSlot.Length());
}
var reader = container.DecryptedBufferByAddress(oldSlot.Address(), oldSlot
.Length());
if (checkClass)
{
var realClass = ClassMetadata.ReadClass(container, reader);
if (realClass != classMetadata)
{
return null;
}
}
if (classMetadata.SeekToField(container.Transaction, reader, this) == HandlerVersion
.Invalid)
{
return null;
}
return new DatabaseIdentityIDAndUUID(reader.ReadInt(), reader.ReadLong
());
}
public void Apply(object idSlot)
{
Db4objects.Db4o.Internal.Slots.Slot slot = ((Db4objects.Db4o.Internal.Slots.Slot)
((Pair)idSlot).second);
usage.value += slot.Length();
this._enclosing._slots.Add(slot);
}
public virtual void SlotFreed(Slot slot)
{
if (_slotFreedCallback == null)
{
return;
}
_slotFreedCallback.Apply(slot);
}
public virtual void TestAllocateSlot()
{
Slot slot = new Slot(1, 15);
_nonBlocked.Free(slot);
Slot allocatedSlot = _nonBlocked.AllocateSlot(8);
int expectedAllocatedSlotLength = _blockConverter.BlockAlignedBytes(8);
Slot expectedSlot = new Slot(1, expectedAllocatedSlotLength);
Assert.AreEqual(expectedSlot, allocatedSlot);
}
public override ByteArrayBuffer GetByteLoad()
{
var address = _payLoad.ReadInt();
var length = _payLoad.Length() - (Const4.IntLength);
var slot = new Slot(address, length);
_payLoad.RemoveFirstBytes(Const4.IntLength);
_payLoad.UseSlot(slot);
return _payLoad;
}
// do nothing
public override void Free(Slot slot)
{
int address = slot.Address();
if (address <= 0)
{
throw new ArgumentException();
}
int length = slot.Length();
if (DTrace.enabled)
{
DTrace.FreespacemanagerRamFree.LogLength(address, length);
}
_finder._key = address;
FreeSlotNode sizeNode;
FreeSlotNode addressnode = (FreeSlotNode)Tree.FindSmaller(_freeByAddress, _finder
);
if ((addressnode != null) && ((addressnode._key + addressnode._peer._key) == address
))
{
sizeNode = addressnode._peer;
RemoveFromFreeBySize(sizeNode);
sizeNode._key += length;
FreeSlotNode secondAddressNode = (FreeSlotNode)Tree.FindGreaterOrEqual(_freeByAddress
, _finder);
if ((secondAddressNode != null) && (address + length == secondAddressNode._key))
{
sizeNode._key += secondAddressNode._peer._key;
RemoveFromBothTrees(secondAddressNode._peer);
}
sizeNode.RemoveChildren();
AddToFreeBySize(sizeNode);
}
else
{
addressnode = (FreeSlotNode)Tree.FindGreaterOrEqual(_freeByAddress, _finder);
if ((addressnode != null) && (address + length == addressnode._key))
{
sizeNode = addressnode._peer;
RemoveFromBothTrees(sizeNode);
sizeNode._key += length;
addressnode._key = address;
addressnode.RemoveChildren();
sizeNode.RemoveChildren();
_freeByAddress = Tree.Add(_freeByAddress, addressnode);
AddToFreeBySize(sizeNode);
}
else
{
if (CanDiscard(length))
{
return;
}
AddFreeSlotNodes(address, length);
}
}
SlotFreed(slot);
}
private bool HandledAsReAdd(Slot slot)
{
if (!Slot.IsNull(slot))
{
return false;
}
_clazz.AddToIndex(_transaction, _id);
return true;
}
public sealed override ByteArrayBuffer GetByteLoad()
{
int address = _payLoad.ReadInt();
int length = _payLoad.Length() - (Const4.IntLength);
Slot slot = new Slot(address, length);
_payLoad.RemoveFirstBytes(Const4.IntLength);
_payLoad.UseSlot(slot);
return this._payLoad;
}
public void UseSlot(Db4objects.Db4o.Internal.Slots.Slot slot)
{
_address = slot.Address();
_offset = 0;
if (slot.Length() > _buffer.Length)
{
_buffer = new byte[slot.Length()];
}
_length = slot.Length();
}
public virtual void TestIndexMarshalling()
{
ByteArrayBuffer reader = new ByteArrayBuffer(2 * Const4.IntLength);
Slot original = new Slot(unchecked((int)(0xdb)), unchecked((int)(0x40)));
StringHandler().WriteIndexEntry(Context(), reader, original);
reader._offset = 0;
Slot retrieved = (Slot)StringHandler().ReadIndexEntry(Context(), reader);
Assert.AreEqual(original.Address(), retrieved.Address());
Assert.AreEqual(original.Length(), retrieved.Length());
}
public virtual void TestToNonBlockedLength()
{
int[] blocks = {0, 1, 8, 9};
int[] bytes = {0, 8, 64, 72};
for (var i = 0; i < blocks.Length; i++)
{
var blockedSlot = new Slot(0, blocks[i]);
var byteSlot = new Slot(0, bytes[i]);
Assert.AreEqual(byteSlot, blockConverter.ToNonBlockedLength(blockedSlot));
}
}
public virtual void TestToBlockedLength()
{
int[] bytes = {0, 1, 2, 7, 8, 9, 16, 17, 799, 800, 801};
int[] blocks = {0, 1, 1, 1, 1, 2, 2, 3, 100, 100, 101};
for (var i = 0; i < bytes.Length; i++)
{
var byteSlot = new Slot(0, bytes[i]);
var blockedSlot = new Slot(0, blocks[i]);
Assert.AreEqual(blockedSlot, blockConverter.ToBlockedLength(byteSlot));
}
}
public virtual void DelayedFree(Slot slot, bool freeToSystemFreeSpaceSystem)
{
if (freeToSystemFreeSpaceSystem)
{
_freeToSystemFreespaceSystem.Add(slot);
}
else
{
_freeToUserFreespaceSystem.Add(slot);
}
}
private void AssertAllocateSlot(int freeSlotSize, int requiredSlotSize, int expectedSlotSize
)
{
Slot slot = new Slot(1, freeSlotSize);
_nonBlocked.Free(slot);
Slot allocatedSlot = _nonBlocked.AllocateSlot(requiredSlotSize);
int expectedAllocatedSlotLength = _blockConverter.BlockAlignedBytes(expectedSlotSize
);
Slot expectedSlot = new Slot(1, expectedAllocatedSlotLength);
Assert.AreEqual(expectedSlot, allocatedSlot);
}
private void ReadThis()
{
SystemData systemData = _container.SystemData();
_slot = systemData.IdSystemSlot();
if (!Slot.IsNull(_slot))
{
ByteArrayBuffer buffer = _container.ReadBufferBySlot(_slot);
_childId = buffer.ReadInt();
_idGenerator.Read(buffer);
_ids = (IdSlotTree)new TreeReader(buffer, new IdSlotTree(0, null)).Read();
}
}
private void FreeSlot(Slot slot)
{
if (slot == null)
{
return;
}
if (_container.FreespaceManager() == null)
{
return;
}
_container.FreespaceManager().FreeSafeSlot(slot);
}
protected override void Free(IFreespaceManager freespaceManager, Slot slot)
{
if (slot.IsNull())
{
return;
}
if (_freed == null)
{
_freed = new Collection4();
}
_freed.Add(slot);
}
public virtual Tree Free(LocalObjectContainer file, Tree treeRoot, Slot
slot)
{
file.Free(_slot.Address(), _slot.Length());
if (RemoveReferenceIsLast())
{
if (treeRoot != null)
{
return treeRoot.RemoveNode(this);
}
}
PointTo(slot);
return treeRoot;
}
private long ClassMetadataUsage()
{
Db4objects.Db4o.Internal.Slots.Slot classRepositorySlot = Slot(_db.ClassCollection
().GetID());
_slots.Add(classRepositorySlot);
long usage = classRepositorySlot.Length();
IEnumerator classIdIter = _db.ClassCollection().Ids();
while (classIdIter.MoveNext())
{
int curClassId = (((int)classIdIter.Current));
Db4objects.Db4o.Internal.Slots.Slot classSlot = Slot(curClassId);
_slots.Add(classSlot);
usage += classSlot.Length();
}
return(usage);
}
private static long BTreeUsage(Transaction transaction, IIdSystem idSystem, BTree
btree, ISlotMap slotMap)
{
IEnumerator nodeIter = btree.AllNodeIds(transaction);
Db4objects.Db4o.Internal.Slots.Slot btreeSlot = idSystem.CommittedSlot(btree.GetID
());
slotMap.Add(btreeSlot);
long usage = btreeSlot.Length();
while (nodeIter.MoveNext())
{
int curNodeId = ((int)nodeIter.Current);
Db4objects.Db4o.Internal.Slots.Slot slot = idSystem.CommittedSlot(curNodeId);
slotMap.Add(slot);
usage += slot.Length();
}
return(usage);
}
public SlotDetail(Slot slot)
{
this._slot = slot;
}
public virtual void NotifyDeleted(IFreespaceManager freespaceManager)
{
if (DTrace.enabled)
{
DTrace.NotifySlotDeleted.Log(_key);
}
Operation(SlotChange.SlotChangeOperation.delete);
FreePreviouslyModifiedSlot(freespaceManager);
_newSlot = Slot.Zero;
}
public virtual void NotifySlotCreated(Slot slot)
{
if (DTrace.enabled)
{
DTrace.NotifySlotCreated.Log(_key);
DTrace.NotifySlotCreated.LogLength(slot);
}
Operation(SlotChange.SlotChangeOperation.create);
_newSlot = slot;
}
protected virtual void Free(IFreespaceManager freespaceManager, Slot slot)
{
if (slot.IsNull())
{
return;
}
if (freespaceManager == null)
{
return;
}
freespaceManager.Free(slot);
}
protected virtual void FreePreviouslyModifiedSlot(IFreespaceManager freespaceManager
)
{
if (Slot.IsNull(_newSlot))
{
return;
}
Free(freespaceManager, _newSlot);
_newSlot = null;
}
public virtual void NotifySlotUpdated(IFreespaceManager freespaceManager, Slot slot
)
{
if (DTrace.enabled)
{
DTrace.NotifySlotUpdated.LogLength(_key, slot);
}
FreePreviouslyModifiedSlot(freespaceManager);
_newSlot = slot;
Operation(SlotChange.SlotChangeOperation.update);
}
public override object Read(ByteArrayBuffer reader)
{
SlotChange change = new SlotChange(reader.ReadInt());
Slot newSlot = new Slot(reader.ReadInt(), reader.ReadInt());
change.NewSlot(newSlot);
return change;
}
public virtual void SlotFreed(Slot slot)
{
}
public virtual void Free(Slot slot)
{
_listener.OnFree(slot);
}
public Pointer4(int id, Slot slot)
{
_id = id;
_slot = slot;
}
public StatefulBuffer(Db4objects.Db4o.Internal.Transaction trans, Db4objects.Db4o.Internal.Slots.Slot
slot) : this(trans, slot.Address(), slot.Length())
{
}
public abstract void ApplySlotChanges(IVisitable slotChangeTree, int slotChangeCount , Slot reservedSlot);
private bool IsValid(Slot slot)
{
return !Slot.IsNull(slot);
}
private void NewSlot(Slot slot)
{
_newSlot = slot;
}
