Msmq.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / ServiceModel / System / ServiceModel / Channels / Msmq.cs / 1 / Msmq.cs
                        

                        
                            //------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------
namespace System.ServiceModel.Channels
{ 
    using System.Threading;
    using System.Net.Security; 
 
    internal static class Msmq
    { 
        static Version longhornVersion = new Version(4, 0);
        static Version version;
        static bool activeDirectoryEnabled;
        static object xpSendLock = null; 
        static UriPrefixTable transportManagerTable = new UriPrefixTable();
        static object staticLock = new object(); 
        static SafeLibraryHandle errorStrings = null; 

        static Msmq() 
        {
            MsmqQueue.GetMsmqInformation(ref version, ref activeDirectoryEnabled);
            MsmqDiagnostics.MsmqDetected(version);
            Version osVersion = System.Environment.OSVersion.Version; 
            if (osVersion.Major  == 5 && osVersion.Minor == 1)
                xpSendLock = new object(); 
        } 

        internal static bool ActiveDirectoryEnabled 
        {
            get { return activeDirectoryEnabled; }
        }
 
        internal static Version Version
        { 
            get { return version; } 
        }
 
        internal static bool IsPerAppDeadLetterQueueSupported
        {
            get { return Msmq.Version >= longhornVersion; }
        } 

        internal static bool IsAdvancedPoisonHandlingSupported 
        { 
            get { return Msmq.Version >= longhornVersion; }
        } 

        internal static bool IsRejectMessageSupported
        {
            get { return Msmq.Version >= longhornVersion; } 
        }
 
        internal static UriPrefixTable StaticTransportManagerTable 
        {
            get { return transportManagerTable; } 
        }

        internal static IPoisonHandlingStrategy CreatePoisonHandler(MsmqReceiveHelper receiver)
        { 
            if (receiver.Transactional)
            { 
                if (Msmq.Version < longhornVersion) 
                {
                    return new Msmq3PoisonHandler(receiver); 
                }
                else
                {
                    if (receiver.ListenUri.AbsoluteUri.Contains(";")) 
                        return new Msmq4SubqueuePoisonHandler(receiver);
                    else 
                        return new Msmq4PoisonHandler(receiver); 
                }
            } 
            else
            {
                return new MsmqNonTransactedPoisonHandler(receiver);
            } 
        }
 
        internal static SafeLibraryHandle ErrorStrings 
        {
            get 
            {
                if (null == errorStrings)
                {
                    lock (staticLock) 
                    {
                        if (null == errorStrings) 
                        { 
#pragma warning suppress 56523 // Callers (there is only one) handle an invalid handle returned from here.
                            errorStrings = UnsafeNativeMethods.LoadLibrary("MQUTIL.DLL"); 
                        }
                    }
                }
                return errorStrings; 
            }
        } 
 
        internal static void EnterXPSendLock(out bool lockHeld, ProtectionLevel protectionLevel)
        { 
            lockHeld = false;
            if (null != xpSendLock && (ProtectionLevel.None != protectionLevel))
            {
                try { } 
                finally
                { 
                    Monitor.Enter(xpSendLock); 
                    lockHeld = true;
                } 
            }
        }

        internal static void LeaveXPSendLock() 
        {
            Monitor.Exit(xpSendLock); 
        } 
    }
} 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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