1 files changed, 34 insertions, 0 deletions
diff --git a/mcs/class/dlr/Runtime/Microsoft.Dynamic/MultiRuntimeAwareAttribute.cs b/mcs/class/dlr/Runtime/Microsoft.Dynamic/MultiRuntimeAwareAttribute.cs
new file mode 100644
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+++ b/mcs/class/dlr/Runtime/Microsoft.Dynamic/MultiRuntimeAwareAttribute.cs
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+/* ****************************************************************************
+ *
+ * Copyright (c) Microsoft Corporation. 
+ *
+ * This source code is subject to terms and conditions of the Apache License, Version 2.0. A 
+ * copy of the license can be found in the License.html file at the root of this distribution. If 
+ * you cannot locate the  Apache License, Version 2.0, please send an email to 
+ * dlr@microsoft.com. By using this source code in any fashion, you are agreeing to be bound 
+ * by the terms of the Apache License, Version 2.0.
+ *
+ * You must not remove this notice, or any other, from this software.
+ *
+ *
+ * ***************************************************************************/
+
+using System;
+using System.Diagnostics;
+
+namespace Microsoft.Scripting {
+    /// <summary>
+    /// marks a field, class, or struct as being safe to have statics which can be accessed
+    /// from multiple runtimes.
+    /// 
+    /// Static fields which are not read-only or marked with this attribute will be flagged 
+    /// by a test which looks for state being shared between runtimes.  Before applying this
+    /// attribute you should ensure that it is safe to share the state.  This is typically
+    /// state which is lazy initialized or state which is caching values which are identical
+    /// in all runtimes and are immutable.
+    /// </summary>
+    [Conditional("DEBUG")]
+    [AttributeUsage(AttributeTargets.Field)]   
+    public sealed class MultiRuntimeAwareAttribute : Attribute {
+    }
+}