public Transaction NewTransaction(TransactionFlags flags)
{
bool txLockTaken = false;
try
{
long txId = _transactionsCounter;
if (flags == (TransactionFlags.ReadWrite))
{
txId = _transactionsCounter + 1;
_txWriter.Wait();
txLockTaken = true;
}
var tx = new Transaction(_pager, this, txId, flags, _freeSpaceRepository);
_activeTransactions.TryAdd(txId, tx);
var state = _pager.TransactionBegan();
tx.AddPagerState(state);
if (flags == TransactionFlags.ReadWrite)
{
_freeSpaceRepository.UpdateSections(tx, OldestTransaction);
}
return(tx);
}
catch (Exception)
{
if (txLockTaken)
{
_txWriter.Release();
}
throw;
}
}
public Transaction NewTransaction(TransactionFlags flags, TimeSpan?timeout = null)
{
bool txLockTaken = false;
try
{
if (flags == (TransactionFlags.ReadWrite))
{
var wait = timeout ?? (Debugger.IsAttached ? TimeSpan.FromMinutes(30) : TimeSpan.FromSeconds(30));
if (_txWriter.Wait(wait) == false)
{
throw new TimeoutException("Waited for " + wait +
" for transaction write lock, but could not get it");
}
txLockTaken = true;
if (_endOfDiskSpace != null)
{
if (_endOfDiskSpace.CanContinueWriting)
{
Debug.Assert(_flushingTask.Status == TaskStatus.Canceled || _flushingTask.Status == TaskStatus.RanToCompletion);
_cancellationTokenSource = new CancellationTokenSource();
_flushingTask = FlushWritesToDataFileAsync();
_endOfDiskSpace = null;
}
}
}
long txId;
Transaction tx;
_txCommit.EnterReadLock();
try
{
txId = flags == TransactionFlags.ReadWrite ? _transactionsCounter + 1 : _transactionsCounter;
tx = new Transaction(this, txId, flags, _freeSpaceHandling);
}
finally
{
_txCommit.ExitReadLock();
}
_activeTransactions.Add(tx);
var state = _dataPager.TransactionBegan();
tx.AddPagerState(state);
if (flags == TransactionFlags.ReadWrite)
{
tx.AfterCommit = TransactionAfterCommit;
}
return(tx);
}
catch (Exception)
{
if (txLockTaken)
{
_txWriter.Release();
}
throw;
}
}