Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.ServiceModel/System/ServiceModel/Administration/AppDomainInfo.cs

@@ -0,0 +1,114 @@
+//------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//------------------------------------------------------------
+
+namespace System.ServiceModel.Administration
+{
+    using System;
+    using System.Diagnostics;
+    using System.Runtime;
+
+    sealed class AppDomainInfo
+    {
+        static object syncRoot = new object();
+        
+        // Double-checked locking pattern requires volatile for read/write synchronization
+        static volatile AppDomainInfo singleton;
+        Guid instanceId;
+        string friendlyName;
+        bool isDefaultAppDomain;
+        string processName;
+        string machineName;
+        int processId;
+        int id;
+
+        AppDomainInfo(AppDomain appDomain)
+        {
+            // Assumption: Only one AppDomainInfo is created per AppDomain
+            Fx.Assert(null != appDomain, "");
+            this.instanceId = Guid.NewGuid();
+            this.friendlyName = appDomain.FriendlyName;
+            this.isDefaultAppDomain = appDomain.IsDefaultAppDomain();
+            Process process = Process.GetCurrentProcess();
+            this.processName = process.ProcessName;
+            this.machineName = Environment.MachineName;
+            this.processId = process.Id;
+            this.id = appDomain.Id;
+
+        }
+
+        public int Id
+        {
+            get
+            {
+                return this.id;
+            }
+        }
+
+        public Guid InstanceId
+        {
+            get
+            {
+                return this.instanceId;
+            }
+        }
+
+        public string MachineName
+        {
+            get
+            {
+                return this.machineName;
+            }
+        }
+
+        public string Name
+        {
+            get
+            {
+                return this.friendlyName;
+            }
+        }
+
+        public bool IsDefaultAppDomain
+        {
+            get
+            {
+                return this.isDefaultAppDomain;
+            }
+        }
+
+        public int ProcessId
+        {
+            get
+            {
+                return this.processId;
+            }
+        }
+
+        public string ProcessName
+        {
+            get
+            {
+                return this.processName;
+            }
+        }
+
+        internal static AppDomainInfo Current
+        {
+            get
+            {
+                if (null == singleton)
+                {
+                    lock (AppDomainInfo.syncRoot)
+                    {
+                        if (null == singleton)
+                        {
+                            singleton = new AppDomainInfo(AppDomain.CurrentDomain);
+                        }
+                    }
+                }
+                return singleton;
+            }
+        }
+    }
+}