internal WrappedTransaction(UnsafeNativeMethods.ITransactionLocal transaction, int isolevel, out OleDbHResult hr) : base(transaction)
{
RuntimeHelpers.PrepareConstrainedRegions();
try
{ }
finally
{
hr = transaction.StartTransaction(isolevel, 0, IntPtr.Zero, out _);
if (0 <= hr)
{
_mustComplete = true;
}
}
}
internal WrappedTransaction(UnsafeNativeMethods.ITransactionLocal transaction, int isolevel, out OleDbHResult hr) : base(transaction)
{
int transactionLevel = 0;
Bid.Trace("<oledb.ITransactionLocal.StartTransaction|API|OLEDB>\n");
RuntimeHelpers.PrepareConstrainedRegions();
try { } finally {
hr = transaction.StartTransaction(isolevel, 0, IntPtr.Zero, out transactionLevel);
if (0 <= hr)
{
_mustComplete = true;
}
}
Bid.Trace("<oledb.ITransactionLocal.StartTransaction|API|OLEDB|RET> %08X{HRESULT}\n", hr);
}
internal void BeginInternal(UnsafeNativeMethods.ITransactionLocal transaction, IsolationLevel isolevel)
{
switch (isolevel)
{
case IsolationLevel.Unspecified:
case IsolationLevel.Chaos:
case IsolationLevel.ReadUncommitted:
case IsolationLevel.ReadCommitted:
case IsolationLevel.RepeatableRead:
case IsolationLevel.Serializable:
break;
default:
throw ADP.InvalidIsolationLevel((int)isolationLevel);
}
int hr, transactionLevel = 0;
#if DEBUG
if (AdapterSwitches.OleDbTrace.TraceInfo)
{
ODB.Trace_Begin("ITransactionLocal", "StartTransaction", this.isolationLevel.ToString("G"));
}
#endif
// $UNDONE: how is it possible to guard against something like ThreadAbortException
// when transaction started, but aborted before localTransaction is set
// so we know to rollback the transaction for when connection is returned to the pool
hr = transaction.StartTransaction((int)isolevel, 0, null, out transactionLevel);
#if DEBUG
if (AdapterSwitches.OleDbTrace.TraceInfo)
{
ODB.Trace_End("ITransactionLocal", "StartTransaction", hr, "TransactionLevel=" + transactionLevel);
}
#endif
if (hr < 0)
{
ProcessResults(hr);
}
this.isolationLevel = isolevel;
this.localTransaction = transaction;
this.iunknown = Marshal.GetIUnknownForObject(transaction);
GC.KeepAlive(this);
}