Exemplo n.º 1
0
        internal static void ShimNotificationCallback(object state, bool timeout)
        {
            IntPtr zero = IntPtr.Zero;
            ShimNotificationType none            = ShimNotificationType.None;
            bool                 isSinglePhase   = false;
            bool                 abortingHint    = false;
            uint                 prepareInfoSize = 0;
            CoTaskMemHandle      prepareInfo     = null;
            bool                 releaseRequired = false;
            bool                 flag3           = false;
            IDtcProxyShimFactory factory         = null;

            if (DiagnosticTrace.Verbose)
            {
                MethodEnteredTraceRecord.Trace(System.Transactions.SR.GetString("TraceSourceOletx"), "OletxTransactionManager.ShimNotificationCallback");
            }
            Thread.BeginCriticalRegion();
            try
            {
Label_003D:
                factory = proxyShimFactory;
                try
                {
                    object obj2;
                    OletxResourceManager manager2;
                    byte[] buffer;
                    Thread.BeginThreadAffinity();
                    RuntimeHelpers.PrepareConstrainedRegions();
                    try
                    {
                        factory.GetNotification(out zero, out none, out isSinglePhase, out abortingHint, out releaseRequired, out prepareInfoSize, out prepareInfo);
                    }
                    finally
                    {
                        if (releaseRequired)
                        {
                            if (HandleTable.FindHandle(zero) is OletxInternalResourceManager)
                            {
                                processingTmDown = true;
                                Monitor.Enter(proxyShimFactory);
                            }
                            else
                            {
                                releaseRequired = false;
                            }
                            factory.ReleaseNotificationLock();
                        }
                        Thread.EndThreadAffinity();
                    }
                    if (processingTmDown)
                    {
                        lock (proxyShimFactory)
                        {
                        }
                    }
                    if (none != ShimNotificationType.None)
                    {
                        obj2 = HandleTable.FindHandle(zero);
                        switch (none)
                        {
                        case ShimNotificationType.Phase0RequestNotify:
                            try
                            {
                                OletxPhase0VolatileEnlistmentContainer container5 = obj2 as OletxPhase0VolatileEnlistmentContainer;
                                if (container5 != null)
                                {
                                    DiagnosticTrace.SetActivityId(container5.TransactionIdentifier);
                                    container5.Phase0Request(abortingHint);
                                }
                                else
                                {
                                    OletxEnlistment enlistment8 = obj2 as OletxEnlistment;
                                    if (enlistment8 != null)
                                    {
                                        DiagnosticTrace.SetActivityId(enlistment8.TransactionIdentifier);
                                        enlistment8.Phase0Request(abortingHint);
                                    }
                                    else
                                    {
                                        Environment.FailFast(System.Transactions.SR.GetString("InternalError"));
                                    }
                                }
                                goto Label_0444;
                            }
                            finally
                            {
                                HandleTable.FreeHandle(zero);
                            }
                            break;

                        case ShimNotificationType.VoteRequestNotify:
                            break;

                        case ShimNotificationType.PrepareRequestNotify:
                            goto Label_02B0;

                        case ShimNotificationType.CommitRequestNotify:
                            goto Label_031A;

                        case ShimNotificationType.AbortRequestNotify:
                            goto Label_0358;

                        case ShimNotificationType.CommittedNotify:
                            try
                            {
                                OutcomeEnlistment enlistment7 = obj2 as OutcomeEnlistment;
                                if (enlistment7 != null)
                                {
                                    DiagnosticTrace.SetActivityId(enlistment7.TransactionIdentifier);
                                    enlistment7.Committed();
                                }
                                else
                                {
                                    OletxPhase1VolatileEnlistmentContainer container3 = obj2 as OletxPhase1VolatileEnlistmentContainer;
                                    if (container3 != null)
                                    {
                                        DiagnosticTrace.SetActivityId(container3.TransactionIdentifier);
                                        container3.Committed();
                                    }
                                    else
                                    {
                                        Environment.FailFast(System.Transactions.SR.GetString("InternalError"));
                                    }
                                }
                                goto Label_0444;
                            }
                            finally
                            {
                                HandleTable.FreeHandle(zero);
                            }
                            goto Label_0203;

                        case ShimNotificationType.AbortedNotify:
                            goto Label_0203;

                        case ShimNotificationType.InDoubtNotify:
                            goto Label_0251;

                        case ShimNotificationType.EnlistmentTmDownNotify:
                            goto Label_0396;

                        case ShimNotificationType.ResourceManagerTmDownNotify:
                            goto Label_03CD;

                        default:
                            goto Label_0410;
                        }
                        OletxPhase1VolatileEnlistmentContainer container4 = obj2 as OletxPhase1VolatileEnlistmentContainer;
                        if (container4 != null)
                        {
                            DiagnosticTrace.SetActivityId(container4.TransactionIdentifier);
                            container4.VoteRequest();
                        }
                        else
                        {
                            Environment.FailFast(System.Transactions.SR.GetString("InternalError"));
                        }
                    }
                    goto Label_0444;
                    Label_0203 :;
                    try
                    {
                        OutcomeEnlistment enlistment6 = obj2 as OutcomeEnlistment;
                        if (enlistment6 != null)
                        {
                            DiagnosticTrace.SetActivityId(enlistment6.TransactionIdentifier);
                            enlistment6.Aborted();
                        }
                        else
                        {
                            OletxPhase1VolatileEnlistmentContainer container2 = obj2 as OletxPhase1VolatileEnlistmentContainer;
                            if (container2 != null)
                            {
                                DiagnosticTrace.SetActivityId(container2.TransactionIdentifier);
                                container2.Aborted();
                            }
                        }
                        goto Label_0444;
                    }
                    finally
                    {
                        HandleTable.FreeHandle(zero);
                    }
                    Label_0251 :;
                    try
                    {
                        OutcomeEnlistment enlistment5 = obj2 as OutcomeEnlistment;
                        if (enlistment5 != null)
                        {
                            DiagnosticTrace.SetActivityId(enlistment5.TransactionIdentifier);
                            enlistment5.InDoubt();
                        }
                        else
                        {
                            OletxPhase1VolatileEnlistmentContainer container = obj2 as OletxPhase1VolatileEnlistmentContainer;
                            if (container != null)
                            {
                                DiagnosticTrace.SetActivityId(container.TransactionIdentifier);
                                container.InDoubt();
                            }
                            else
                            {
                                Environment.FailFast(System.Transactions.SR.GetString("InternalError"));
                            }
                        }
                        goto Label_0444;
                    }
                    finally
                    {
                        HandleTable.FreeHandle(zero);
                    }
Label_02B0:
                    buffer = new byte[prepareInfoSize];
                    Marshal.Copy(prepareInfo.DangerousGetHandle(), buffer, 0, Convert.ToInt32(prepareInfoSize));
                    bool flag2 = true;
                    try
                    {
                        OletxEnlistment enlistment4 = obj2 as OletxEnlistment;
                        if (enlistment4 != null)
                        {
                            DiagnosticTrace.SetActivityId(enlistment4.TransactionIdentifier);
                            flag2 = enlistment4.PrepareRequest(isSinglePhase, buffer);
                        }
                        else
                        {
                            Environment.FailFast(System.Transactions.SR.GetString("InternalError"));
                        }
                        goto Label_0444;
                    }
                    finally
                    {
                        if (flag2)
                        {
                            HandleTable.FreeHandle(zero);
                        }
                    }
                    Label_031A :;
                    try
                    {
                        OletxEnlistment enlistment3 = obj2 as OletxEnlistment;
                        if (enlistment3 != null)
                        {
                            DiagnosticTrace.SetActivityId(enlistment3.TransactionIdentifier);
                            enlistment3.CommitRequest();
                        }
                        else
                        {
                            Environment.FailFast(System.Transactions.SR.GetString("InternalError"));
                        }
                        goto Label_0444;
                    }
                    finally
                    {
                        HandleTable.FreeHandle(zero);
                    }
                    Label_0358 :;
                    try
                    {
                        OletxEnlistment enlistment2 = obj2 as OletxEnlistment;
                        if (enlistment2 != null)
                        {
                            DiagnosticTrace.SetActivityId(enlistment2.TransactionIdentifier);
                            enlistment2.AbortRequest();
                        }
                        else
                        {
                            Environment.FailFast(System.Transactions.SR.GetString("InternalError"));
                        }
                        goto Label_0444;
                    }
                    finally
                    {
                        HandleTable.FreeHandle(zero);
                    }
                    Label_0396 :;
                    try
                    {
                        OletxEnlistment enlistment = obj2 as OletxEnlistment;
                        if (enlistment != null)
                        {
                            DiagnosticTrace.SetActivityId(enlistment.TransactionIdentifier);
                            enlistment.TMDown();
                        }
                        else
                        {
                            Environment.FailFast(System.Transactions.SR.GetString("InternalError"));
                        }
                        goto Label_0444;
                    }
                    finally
                    {
                        HandleTable.FreeHandle(zero);
                    }
Label_03CD:
                    manager2 = obj2 as OletxResourceManager;
                    try
                    {
                        if (manager2 != null)
                        {
                            manager2.TMDown();
                        }
                        else
                        {
                            OletxInternalResourceManager manager = obj2 as OletxInternalResourceManager;
                            if (manager != null)
                            {
                                manager.TMDown();
                            }
                            else
                            {
                                Environment.FailFast(System.Transactions.SR.GetString("InternalError"));
                            }
                        }
                        goto Label_0444;
                    }
                    finally
                    {
                        HandleTable.FreeHandle(zero);
                    }
Label_0410:
                    Environment.FailFast(System.Transactions.SR.GetString("InternalError"));
                }
                finally
                {
                    if (prepareInfo != null)
                    {
                        prepareInfo.Close();
                    }
                    if (releaseRequired)
                    {
                        releaseRequired  = false;
                        processingTmDown = false;
                        Monitor.Exit(proxyShimFactory);
                    }
                }
Label_0444:
                if (none != ShimNotificationType.None)
                {
                    goto Label_003D;
                }
                flag3 = true;
            }
            finally
            {
                if (releaseRequired)
                {
                    releaseRequired  = false;
                    processingTmDown = false;
                    Monitor.Exit(proxyShimFactory);
                }
                if (!flag3 && (zero != IntPtr.Zero))
                {
                    HandleTable.FreeHandle(zero);
                }
                Thread.EndCriticalRegion();
            }
            if (DiagnosticTrace.Verbose)
            {
                MethodExitedTraceRecord.Trace(System.Transactions.SR.GetString("TraceSourceOletx"), "OletxTransactionManager.ShimNotificationCallback");
            }
        }
Exemplo n.º 2
0
        internal static void ShimNotificationCallback(object state, bool timeout)
        {
            // First we need to get the notification from the shim factory.
            IntPtr enlistmentHandleIntPtr             = IntPtr.Zero;
            ShimNotificationType shimNotificationType = ShimNotificationType.None;
            bool isSinglePhase = false;
            bool abortingHint  = false;

            UInt32          prepareInfoSize   = 0;
            CoTaskMemHandle prepareInfoBuffer = null;

            bool holdingNotificationLock = false;
            bool cleanExit = false;

            IDtcProxyShimFactory localProxyShimFactory = null;

            if (DiagnosticTrace.Verbose)
            {
                MethodEnteredTraceRecord.Trace(SR.GetString(SR.TraceSourceOletx),
                                               "OletxTransactionManager.ShimNotificationCallback"
                                               );
            }

            // This lock doesn't really protect any of our data.  It is here so that if an exception occurs
            // while calling out to the app, we get an escalation to AppDomainUnload.
            Thread.BeginCriticalRegion();
            try
            {
                do
                {
                    // Take a local copy of the proxyShimFactory because if we get an RM TMDown notification,
                    // we will still hold the critical section in that factory, but processing of the TMDown will
                    // cause replacement of the OletxTransactionManager.proxyShimFactory.
                    localProxyShimFactory = OletxTransactionManager.proxyShimFactory;
                    try
                    {
                        Thread.BeginThreadAffinity();
                        RuntimeHelpers.PrepareConstrainedRegions();
                        try
                        {
                            localProxyShimFactory.GetNotification(
                                out enlistmentHandleIntPtr,
                                out shimNotificationType,
                                out isSinglePhase,
                                out abortingHint,
                                out holdingNotificationLock,
                                out prepareInfoSize,
                                out prepareInfoBuffer
                                );
                        }
                        finally
                        {
                            if (holdingNotificationLock)
                            {
                                if ((HandleTable.FindHandle(enlistmentHandleIntPtr)) is OletxInternalResourceManager)
                                {
                                    // In this case we know that the TM has gone down and we need to exchange
                                    // the native lock for a managed lock.
                                    processingTmDown = true;
#pragma warning disable 0618
                                    //@
                                    System.Threading.Monitor.Enter(OletxTransactionManager.proxyShimFactory);
#pragma warning restore 0618
                                }
                                else
                                {
                                    holdingNotificationLock = false;
                                }
                                localProxyShimFactory.ReleaseNotificationLock();
                            }
                            Thread.EndThreadAffinity();
                        }

                        // If a TM down is being processed it is possible that the native lock
                        // has been exchanged for a managed lock.  In that case we need to attempt
                        // to take a lock to hold up processing more events until the TM down
                        // processing is complete.
                        if (processingTmDown)
                        {
                            lock (OletxTransactionManager.proxyShimFactory)
                            {
                                // We don't do any work under this lock just make sure that we
                                // can take it.
                            }
                        }

                        if (ShimNotificationType.None != shimNotificationType)
                        {
                            Object target = HandleTable.FindHandle(enlistmentHandleIntPtr);

                            // Next, based on the notification type, cast the Handle accordingly and make
                            // the appropriate call on the enlistment.
                            switch (shimNotificationType)
                            {
                            case ShimNotificationType.Phase0RequestNotify:
                            {
                                try
                                {
                                    OletxPhase0VolatileEnlistmentContainer ph0VolEnlistContainer = target as OletxPhase0VolatileEnlistmentContainer;
                                    if (null != ph0VolEnlistContainer)
                                    {
                                        DiagnosticTrace.SetActivityId(
                                            ph0VolEnlistContainer.TransactionIdentifier);
                                        //CSDMain 91509 - We now synchronize this call with the AddDependentClone call in RealOleTxTransaction
                                        ph0VolEnlistContainer.Phase0Request(abortingHint);
                                    }
                                    else
                                    {
                                        OletxEnlistment enlistment = target as OletxEnlistment;
                                        if (null != enlistment)
                                        {
                                            DiagnosticTrace.SetActivityId(
                                                enlistment.TransactionIdentifier);
                                            enlistment.Phase0Request(abortingHint);
                                        }
                                        else
                                        {
                                            Environment.FailFast(SR.GetString(SR.InternalError));
                                        }
                                    }
                                }
                                finally
                                {
                                    // We aren't going to get any more notifications on this.
                                    HandleTable.FreeHandle(enlistmentHandleIntPtr);
                                }
                                break;
                            }

                            case ShimNotificationType.VoteRequestNotify:
                            {
                                OletxPhase1VolatileEnlistmentContainer ph1VolEnlistContainer = target as OletxPhase1VolatileEnlistmentContainer;
                                if (null != ph1VolEnlistContainer)
                                {
                                    DiagnosticTrace.SetActivityId(
                                        ph1VolEnlistContainer.TransactionIdentifier);
                                    ph1VolEnlistContainer.VoteRequest();
                                }
                                else
                                {
                                    Environment.FailFast(SR.GetString(SR.InternalError));
                                }

                                break;
                            }

                            case ShimNotificationType.CommittedNotify:
                            {
                                try
                                {
                                    OutcomeEnlistment outcomeEnlistment = target as OutcomeEnlistment;
                                    if (null != outcomeEnlistment)
                                    {
                                        DiagnosticTrace.SetActivityId(
                                            outcomeEnlistment.TransactionIdentifier);
                                        outcomeEnlistment.Committed();
                                    }
                                    else
                                    {
                                        OletxPhase1VolatileEnlistmentContainer ph1VolEnlistContainer = target as OletxPhase1VolatileEnlistmentContainer;
                                        if (null != ph1VolEnlistContainer)
                                        {
                                            DiagnosticTrace.SetActivityId(
                                                ph1VolEnlistContainer.TransactionIdentifier);
                                            ph1VolEnlistContainer.Committed();
                                        }
                                        else
                                        {
                                            Environment.FailFast(SR.GetString(SR.InternalError));
                                        }
                                    }
                                }
                                finally
                                {
                                    // We aren't going to get any more notifications on this.
                                    HandleTable.FreeHandle(enlistmentHandleIntPtr);
                                }
                                break;
                            }

                            case ShimNotificationType.AbortedNotify:
                            {
                                try
                                {
                                    OutcomeEnlistment outcomeEnlistment = target as OutcomeEnlistment;
                                    if (null != outcomeEnlistment)
                                    {
                                        DiagnosticTrace.SetActivityId(
                                            outcomeEnlistment.TransactionIdentifier);
                                        outcomeEnlistment.Aborted();
                                    }
                                    else
                                    {
                                        OletxPhase1VolatileEnlistmentContainer ph1VolEnlistContainer = target as OletxPhase1VolatileEnlistmentContainer;
                                        if (null != ph1VolEnlistContainer)
                                        {
                                            DiagnosticTrace.SetActivityId(
                                                ph1VolEnlistContainer.TransactionIdentifier);
                                            ph1VolEnlistContainer.Aborted();
                                        }
                                        // else
                                        // Voters may receive notifications even
                                        // in cases where they therwise respond
                                        // negatively to the vote request.  It is
                                        // also not guaranteed that we will get a
                                        // notification if we do respond negatively.
                                        // The only safe thing to do is to free the
                                        // Handle when we abort the transaction
                                        // with a voter.  These two things together
                                        // mean that we cannot guarantee that this
                                        // Handle will be alive when we get this
                                        // notification.
                                    }
                                }
                                finally
                                {
                                    // We aren't going to get any more notifications on this.
                                    HandleTable.FreeHandle(enlistmentHandleIntPtr);
                                }
                                break;
                            }

                            case ShimNotificationType.InDoubtNotify:
                            {
                                try
                                {
                                    OutcomeEnlistment outcomeEnlistment = target as OutcomeEnlistment;
                                    if (null != outcomeEnlistment)
                                    {
                                        DiagnosticTrace.SetActivityId(
                                            outcomeEnlistment.TransactionIdentifier);
                                        outcomeEnlistment.InDoubt();
                                    }
                                    else
                                    {
                                        OletxPhase1VolatileEnlistmentContainer ph1VolEnlistContainer = target as OletxPhase1VolatileEnlistmentContainer;
                                        if (null != ph1VolEnlistContainer)
                                        {
                                            DiagnosticTrace.SetActivityId(
                                                ph1VolEnlistContainer.TransactionIdentifier);
                                            ph1VolEnlistContainer.InDoubt();
                                        }
                                        else
                                        {
                                            Environment.FailFast(SR.GetString(SR.InternalError));
                                        }
                                    }
                                }
                                finally
                                {
                                    // We aren't going to get any more notifications on this.
                                    HandleTable.FreeHandle(enlistmentHandleIntPtr);
                                }
                                break;
                            }

                            case ShimNotificationType.PrepareRequestNotify:
                            {
                                byte[] prepareInfo = new byte[prepareInfoSize];
                                Marshal.Copy(prepareInfoBuffer.DangerousGetHandle(), prepareInfo, 0, Convert.ToInt32(prepareInfoSize));
                                bool enlistmentDone = true;

                                try
                                {
                                    OletxEnlistment enlistment = target as OletxEnlistment;
                                    if (null != enlistment)
                                    {
                                        DiagnosticTrace.SetActivityId(
                                            enlistment.TransactionIdentifier);
                                        enlistmentDone = enlistment.PrepareRequest(
                                            isSinglePhase,
                                            prepareInfo
                                            );
                                    }
                                    else
                                    {
                                        Environment.FailFast(SR.GetString(SR.InternalError));
                                    }
                                }
                                finally
                                {
                                    if (enlistmentDone)
                                    {
                                        HandleTable.FreeHandle(enlistmentHandleIntPtr);
                                    }
                                }

                                break;
                            }

                            case ShimNotificationType.CommitRequestNotify:
                            {
                                try
                                {
                                    OletxEnlistment enlistment = target as OletxEnlistment;
                                    if (null != enlistment)
                                    {
                                        DiagnosticTrace.SetActivityId(
                                            enlistment.TransactionIdentifier);
                                        enlistment.CommitRequest();
                                    }
                                    else
                                    {
                                        Environment.FailFast(SR.GetString(SR.InternalError));
                                    }
                                }
                                finally
                                {
                                    // We aren't going to get any more notifications on this.
                                    HandleTable.FreeHandle(enlistmentHandleIntPtr);
                                }

                                break;
                            }

                            case ShimNotificationType.AbortRequestNotify:
                            {
                                try
                                {
                                    OletxEnlistment enlistment = target as OletxEnlistment;
                                    if (null != enlistment)
                                    {
                                        DiagnosticTrace.SetActivityId(
                                            enlistment.TransactionIdentifier);
                                        enlistment.AbortRequest();
                                    }
                                    else
                                    {
                                        Environment.FailFast(SR.GetString(SR.InternalError));
                                    }
                                }
                                finally
                                {
                                    // We aren't going to get any more notifications on this.
                                    HandleTable.FreeHandle(enlistmentHandleIntPtr);
                                }

                                break;
                            }

                            case ShimNotificationType.EnlistmentTmDownNotify:
                            {
                                try
                                {
                                    OletxEnlistment enlistment = target as OletxEnlistment;
                                    if (null != enlistment)
                                    {
                                        DiagnosticTrace.SetActivityId(
                                            enlistment.TransactionIdentifier);
                                        enlistment.TMDown();
                                    }
                                    else
                                    {
                                        Environment.FailFast(SR.GetString(SR.InternalError));
                                    }
                                }
                                finally
                                {
                                    // We aren't going to get any more notifications on this.
                                    HandleTable.FreeHandle(enlistmentHandleIntPtr);
                                }

                                break;
                            }


                            case ShimNotificationType.ResourceManagerTmDownNotify:
                            {
                                OletxResourceManager resourceManager = target as OletxResourceManager;
                                try
                                {
                                    if (null != resourceManager)
                                    {
                                        resourceManager.TMDown();
                                    }
                                    else
                                    {
                                        OletxInternalResourceManager internalResourceManager = target as OletxInternalResourceManager;
                                        if (null != internalResourceManager)
                                        {
                                            internalResourceManager.TMDown();
                                        }
                                        else
                                        {
                                            Environment.FailFast(SR.GetString(SR.InternalError));
                                        }
                                    }
                                }
                                finally
                                {
                                    HandleTable.FreeHandle(enlistmentHandleIntPtr);
                                }

                                // Note that we don't free the gchandle on the OletxResourceManager.  These objects
                                // are not going to go away.
                                break;
                            }

                            default:
                            {
                                Environment.FailFast(SR.GetString(SR.InternalError));
                                break;
                            }
                            }
                        }
                    }
                    finally
                    {
                        if (null != prepareInfoBuffer)
                        {
                            prepareInfoBuffer.Close();
                        }

                        if (holdingNotificationLock)
                        {
                            holdingNotificationLock = false;
                            processingTmDown        = false;
                            System.Threading.Monitor.Exit(OletxTransactionManager.proxyShimFactory);
                        }
                    }
                }while (ShimNotificationType.None != shimNotificationType);

                cleanExit = true;
            }
            finally
            {
                if (holdingNotificationLock)
                {
                    holdingNotificationLock = false;
                    processingTmDown        = false;
                    System.Threading.Monitor.Exit(OletxTransactionManager.proxyShimFactory);
                }

                if (!cleanExit && enlistmentHandleIntPtr != IntPtr.Zero)
                {
                    HandleTable.FreeHandle(enlistmentHandleIntPtr);
                }

                Thread.EndCriticalRegion();
            }

            if (DiagnosticTrace.Verbose)
            {
                MethodExitedTraceRecord.Trace(SR.GetString(SR.TraceSourceOletx),
                                              "OletxTransactionManager.ShimNotificationCallback"
                                              );
            }
        }