System.Transactions.TransactionTable.Add C# (CSharp) Method

        internal int Add(InternalTransaction txNew)
        {
            // Tell the runtime that we are modifying global state.
            int readerIndex = 0;

            readerIndex = _rwLock.EnterReadLock();
            try
            {
                // Start the timer if needed before checking the current time since the current
                // time can be more efficient with a running timer.
                if (txNew.AbsoluteTimeout != long.MaxValue)
                {
                    if (!_timerEnabled)
                    {
                        if (!_timer.Change(_timerInterval, _timerInterval))
                        {
                            throw TransactionException.CreateInvalidOperationException(
                                TraceSourceType.TraceSourceLtm,
                                SR.UnexpectedTimerFailure,
                                null
                                );
                        }
                        _lastTimerTime = DateTime.UtcNow.Ticks;
                        _timerEnabled = true;
                    }
                }
                txNew.CreationTime = CurrentTime;

                AddIter(txNew);
            }
            finally
            {
                _rwLock.ExitReadLock();
            }

            return readerIndex;
        }