1 files changed, 48 insertions, 0 deletions
diff --git a/src/mscorlib/src/System/Runtime/InteropServices/PInvokeMap.cs b/src/mscorlib/src/System/Runtime/InteropServices/PInvokeMap.cs
new file mode 100644
index 0000000000..f47165544a
--- /dev/null
+++ b/src/mscorlib/src/System/Runtime/InteropServices/PInvokeMap.cs
@@ -0,0 +1,48 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+////////////////////////////////////////////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////////
+//
+// PInvokeMap is an enum that defines the PInvoke attributes.  These
+//  values are defined in CorHdr.h.
+//
+//
+namespace System.Runtime.InteropServices {
+    using System.Runtime.InteropServices;
+    using System;
+    
+    // This Enum matchs the CorPinvokeMap defined in CorHdr.h
+    [Serializable]
+    internal enum PInvokeMap
+    {
+        NoMangle            = 0x0001,   // Pinvoke is to use the member name as specified.
+        CharSetMask         = 0x0006,   // Heuristic used in data type & name mapping.
+        CharSetNotSpec      = 0x0000,
+        CharSetAnsi         = 0x0002, 
+        CharSetUnicode      = 0x0004,
+        CharSetAuto         = 0x0006,
+    
+        PinvokeOLE          = 0x0020,   // Heuristic: pinvoke will return hresult, with return value becoming the retval param. Not relevant for fields. 
+        SupportsLastError   = 0x0040,   // Information about target function. Not relevant for fields.
+
+        BestFitMask         = 0x0030,
+        BestFitEnabled      = 0x0010,
+        BestFitDisabled     = 0x0020,
+        BestFitUseAsm       = 0x0030,
+    
+        ThrowOnUnmappableCharMask       = 0x3000,
+        ThrowOnUnmappableCharEnabled    = 0x1000,
+        ThrowOnUnmappableCharDisabled   = 0x2000,
+        ThrowOnUnmappableCharUseAsm     = 0x3000,
+    
+        // None of the calling convention flags is relevant for fields.
+        CallConvMask        = 0x0700,
+        CallConvWinapi      = 0x0100,   // Pinvoke will use native callconv appropriate to target windows platform.
+        CallConvCdecl       = 0x0200,
+        CallConvStdcall     = 0x0300,
+        CallConvThiscall    = 0x0400,   // In M9, pinvoke will raise exception.
+        CallConvFastcall    = 0x0500,
+    }
+}