public virtual void DeallocateObject(IPersistent obj)
{
lock (this)
{
lock (objectCache)
{
int oid = obj.Oid;
if (oid == 0)
{
return;
}
long pos = GetPos(oid);
objectCache.Remove(oid);
int offs = (int) pos & (Page.pageSize - 1);
if ((offs & (dbFreeHandleFlag | dbPageObjectFlag)) != 0)
{
throw new StorageError(StorageError.DELETED_OBJECT);
}
Page pg = pool.GetPage(pos - offs);
offs &= ~ dbFlagsMask;
int size = ObjectHeader.GetSize(pg.data, offs);
pool.Unfix(pg);
FreeId(oid);
if ((pos & dbModifiedFlag) != 0)
{
Free(pos & ~ dbFlagsMask, size);
}
else
{
CloneBitmap(pos, size);
}
obj.AssignOid(this, 0, false);
}
}
}
private void StoreObject0(IPersistent obj)
{
obj.OnStore();
int oid = obj.Oid;
bool newObject = false;
if (oid == 0)
{
oid = AllocateId();
if (!obj.Deleted)
{
objectCache.Put(oid, obj);
}
obj.AssignOid(this, oid, false);
newObject = true;
}
else if (obj.Modified)
{
objectCache.ClearDirty(oid);
}
byte[] data = PackObject(obj);
long pos;
int newSize = ObjectHeader.GetSize(data, 0);
if (newObject || (pos = GetPos(oid)) == 0)
{
pos = Allocate(newSize, 0);
SetPos(oid, pos | dbModifiedFlag);
}
else
{
int offs = (int) pos & (Page.pageSize - 1);
if ((offs & (dbFreeHandleFlag | dbPageObjectFlag)) != 0)
{
throw new StorageError(StorageError.DELETED_OBJECT);
}
Page pg = pool.GetPage(pos - offs);
offs &= ~ dbFlagsMask;
int size = ObjectHeader.GetSize(pg.data, offs);
pool.Unfix(pg);
if ((pos & dbModifiedFlag) == 0)
{
CloneBitmap(pos & ~ dbFlagsMask, size);
pos = Allocate(newSize, 0);
SetPos(oid, pos | dbModifiedFlag);
}
else
{
if (((newSize + dbAllocationQuantum - 1) & ~ (dbAllocationQuantum - 1)) > ((size + dbAllocationQuantum - 1) & ~ (dbAllocationQuantum - 1)))
{
long newPos = Allocate(newSize, 0);
CloneBitmap(pos & ~ dbFlagsMask, size);
Free(pos & ~ dbFlagsMask, size);
pos = newPos;
SetPos(oid, pos | dbModifiedFlag);
}
else if (newSize < size)
{
ObjectHeader.SetSize(data, 0, size);
}
}
}
modified = true;
pool.Put(pos & ~ dbFlagsMask, data, newSize);
}
internal void AssignOid(IPersistent obj, int oid)
{
obj.AssignOid(this, oid, false);
}
internal IPersistent LoadStub(int oid, IPersistent obj, Type cls)
{
long pos = GetPos(oid);
if ((pos & (dbFreeHandleFlag | dbPageObjectFlag)) != 0)
{
throw new StorageError(StorageError.DELETED_OBJECT);
}
byte[] body = pool.Get(pos & ~ dbFlagsMask);
ClassDescriptor desc;
int typeOid = ObjectHeader.GetType(body, 0);
if (typeOid == 0)
{
//UPGRADE_TODO: Method 'java.util.HashMap.get' was converted to 'System.Collections.Hashtable.Item' which has a different behavior.
desc = (ClassDescriptor) classDescMap[cls];
}
else
{
desc = FindClassDescriptor(typeOid);
}
if (obj == null)
{
obj = (IPersistent) desc.NewInstance();
objectCache.Put(oid, obj);
}
obj.AssignOid(this, oid, false);
if (obj is FastSerializable)
{
((FastSerializable) obj).Unpack(body, ObjectHeader.Sizeof, encoding);
}
else
{
try
{
UnpackObject(obj, desc, obj.RecursiveLoading, body, ObjectHeader.Sizeof, obj);
}
catch (System.Exception x)
{
throw new StorageError(StorageError.ACCESS_VIOLATION, x);
}
}
obj.OnLoad();
return obj;
}
public virtual int MakePersistent(IPersistent obj)
{
lock (this)
{
if (!opened)
throw new StorageError(StorageError.STORAGE_NOT_OPENED);
if (obj == null)
return 0;
int oid = obj.Oid;
if (oid != 0)
return oid;
lock (objectCache)
{
oid = AllocateId();
obj.AssignOid(this, oid, false);
SetPos(oid, 0);
objectCache.Put(oid, obj);
obj.Modify();
return oid;
}
}
}
