internal void UpgradeTransactionToWriteOne(KeyValueDBTransaction transaction, ReadTrLink link)
{
lock (_readLinkLock)
{
if (link == null && _writeTrInCreation)
{
_writeTrInCreation = false;
}
else
{
if (_writeTr != null || _writeTrInCreation) throw new BTDBTransactionRetryException("Write transaction already running");
if (link.TransactionNumber != _currentState.TransactionCounter)
throw new BTDBTransactionRetryException("Newer write transaction already finished");
}
_writeTr = transaction;
_currentTrCommited = false;
_commitNeeded = false;
_newState.TransactionCounter++;
_unallocatedCounter = 0;
Debug.Assert(_unallocatedSectorHeadLink == null);
Debug.Assert(_unallocatedSectorTailLink == null);
Debug.Assert(_dirtySectorHeadLink == null);
Debug.Assert(_dirtySectorTailLink == null);
Debug.Assert(_inTransactionSectorHeadLink == null);
Debug.Assert(_inTransactionSectorTailLink == null);
Debug.Assert(_spaceAllocatedInTransaction.Empty);
Debug.Assert(_spaceDeallocatedInTransaction.Empty);
}
}
internal void DisposeWriteTransaction()
{
try
{
if (_commitNeeded)
{
// rollback
_freeSpaceAllocatorOptimizer.RollbackWriteTransaction();
SwapCurrentAndNewState();
TransferNewStateToCurrentState();
_commitNeeded = false;
_spaceUsedByReadOnlyTransactions.UnmergeInPlace(_spaceDeallocatedInTransaction);
_spaceAllocatedInTransaction.Clear();
_spaceDeallocatedInTransaction.Clear();
while (_unallocatedSectorHeadLink != null)
{
LowLevelRemoveFromSectorCache(_unallocatedSectorHeadLink);
UnlinkFromUnallocatedSectors(_unallocatedSectorHeadLink);
}
while (_dirtySectorHeadLink != null)
{
LowLevelRemoveFromSectorCache(_dirtySectorHeadLink);
UnlinkFromDirtySectors(_dirtySectorHeadLink);
}
while (_inTransactionSectorHeadLink != null)
{
LowLevelRemoveFromSectorCache(_inTransactionSectorHeadLink);
DetransactionalizeSector(_inTransactionSectorHeadLink);
}
}
//Debug.Assert(_sectorCache.Keys.ToList().Exists(l => l < 0) == false);
}
finally
{
DereferenceReadLink(_readTrLinkHead);
lock (_readLinkLock)
{
_writeTr = null;
}
}
if (!_writtingQueue.IsEmpty) TryToRunNextWrittingTransaction();
}