// Add a transaction to the table. Transactions are added to the end of the list in sorted order based on their
// absolute timeout.
internal int Add(InternalTransaction txNew)
{
// Tell the runtime that we are modifying global state.
Thread.BeginCriticalRegion();
int readerIndex = 0;
try
{
readerIndex = rwLock.AcquireReaderLock();
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 (!this.timerEnabled)
{
if (!this.timer.Change(this.timerInterval, this.timerInterval))
{
throw TransactionException.CreateInvalidOperationException(
SR.GetString(SR.TraceSourceLtm),
SR.GetString(SR.UnexpectedTimerFailure),
null
);
}
this.lastTimerTime = DateTime.UtcNow.Ticks;
this.timerEnabled = true;
}
}
txNew.CreationTime = CurrentTime;
AddIter(txNew);
}
finally
{
rwLock.ReleaseReaderLock();
}
}
finally
{
Thread.EndCriticalRegion();
}
return(readerIndex);
}
