Initial commit - WPinternals 2.6

DiscUtils/Ntfs/NtfsTransaction.cs

@@ -0,0 +1,66 @@
+//
+// Copyright (c) 2008-2011, Kenneth Bell
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the "Software"),
+// to deal in the Software without restriction, including without limitation
+// the rights to use, copy, modify, merge, publish, distribute, sublicense,
+// and/or sell copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+//
+
+namespace DiscUtils.Ntfs
+{
+    using System;
+    using System.Collections.Generic;
+    using System.Text;
+
+    internal sealed class NtfsTransaction : IDisposable
+    {
+        [ThreadStatic]
+        private static NtfsTransaction s_instance;
+
+        private bool _ownRecord;
+
+        private DateTime _timestamp;
+
+        public NtfsTransaction()
+        {
+            if (s_instance == null)
+            {
+                s_instance = this;
+                _timestamp = DateTime.UtcNow;
+                _ownRecord = true;
+            }
+        }
+
+        public static NtfsTransaction Current
+        {
+            get { return s_instance; }
+        }
+
+        public DateTime Timestamp
+        {
+            get { return _timestamp; }
+        }
+
+        public void Dispose()
+        {
+            if (_ownRecord)
+            {
+                s_instance = null;
+            }
+        }
+    }
+}