1 files changed, 58 insertions, 0 deletions
diff --git a/product/database/transactions/PerThread.cs b/product/database/transactions/PerThread.cs
new file mode 100644
index 0000000..6e5c800
--- /dev/null
+++ b/product/database/transactions/PerThread.cs
@@ -0,0 +1,58 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Threading;
+
+namespace momoney.database.transactions
+{
+    public class PerThread : IContext
+    {
+        readonly IDictionary<int, LocalDataStoreSlot> slots;
+        readonly object mutex = new object();
+
+        public PerThread()
+        {
+            slots = new Dictionary<int, LocalDataStoreSlot>();
+        }
+
+        public bool contains<T>(IKey<T> key)
+        {
+            return key.is_found_in(get_items());
+        }
+
+        public void add<T>(IKey<T> key, T value)
+        {
+            key.add_value_to(get_items(), value);
+        }
+
+        public T value_for<T>(IKey<T> key)
+        {
+            return key.parse_from(get_items());
+        }
+
+        public void remove<T>(IKey<T> key)
+        {
+            key.remove_from(get_items());
+        }
+
+        IDictionary get_items()
+        {
+            var id = Thread.CurrentThread.ManagedThreadId;
+            within_lock(() =>
+            {
+                if (!slots.ContainsKey(id))
+                {
+                    var slot = Thread.GetNamedDataSlot(GetType().FullName);
+                    slots.Add(id, slot);
+                    Thread.SetData(slot, new Hashtable());
+                }
+            });
+            return (IDictionary) Thread.GetData(slots[id]);
+        }
+
+        void within_lock(Action action)
+        {
+            lock (mutex) action();
+        }
+    }
+}
+\ No newline at end of file