1 files changed, 40 insertions, 0 deletions
diff --git a/src/mscorlib/src/System/Runtime/InteropServices/WindowsRuntime/WindowsRuntimeBufferHelper.cs b/src/mscorlib/src/System/Runtime/InteropServices/WindowsRuntime/WindowsRuntimeBufferHelper.cs
new file mode 100644
index 0000000000..12cf107a47
--- /dev/null
+++ b/src/mscorlib/src/System/Runtime/InteropServices/WindowsRuntime/WindowsRuntimeBufferHelper.cs
@@ -0,0 +1,40 @@
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using System.Runtime.CompilerServices;
+using System.Runtime.ConstrainedExecution;
+using System.Runtime.Versioning;
+using System.Security;
+using System.Threading;
+
+
+namespace System.Runtime.InteropServices.WindowsRuntime {
+
+/// <summary>
+/// Exposes a helper method that allows <code>WindowsRuntimeBuffer : IBuffer, IBufferInternal</code> which is implemented in
+/// <code>System.Runtime.WindowsRuntime.dll</code> to call into the VM.
+/// </summary>
+[FriendAccessAllowed]
+internal static class WindowsRuntimeBufferHelper {
+
+
+    [SecurityCritical]
+    [DllImport(JitHelpers.QCall)]
+    [SuppressUnmanagedCodeSecurity]
+    [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
+    private unsafe extern static void StoreOverlappedPtrInCCW(ObjectHandleOnStack windowsRuntimeBuffer, NativeOverlapped* overlapped);
+
+
+    [FriendAccessAllowed]
+    [SecurityCritical]
+    [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
+    internal unsafe static void StoreOverlappedInCCW(Object windowsRuntimeBuffer, NativeOverlapped* overlapped) {
+
+        StoreOverlappedPtrInCCW(JitHelpers.GetObjectHandleOnStack(ref windowsRuntimeBuffer), overlapped);
+    }
+
+}  // class WindowsRuntimeBufferHelper
+
+}  // namespace
+
+// WindowsRuntimeBufferHelper.cs