1 files changed, 35 insertions, 0 deletions
diff --git a/src/mscorlib/src/System/Runtime/RuntimeImports.cs b/src/mscorlib/src/System/Runtime/RuntimeImports.cs
new file mode 100644
index 0000000000..16d41d3951
--- /dev/null
+++ b/src/mscorlib/src/System/Runtime/RuntimeImports.cs
@@ -0,0 +1,35 @@
+// 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.
+
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+#if BIT64
+using nuint = System.UInt64;
+#else
+    using nuint = System.UInt32;
+#endif
+
+namespace System.Runtime
+{
+    public class RuntimeImports
+    {
+        // Non-inlinable wrapper around the QCall that avoids poluting the fast path
+        // with P/Invoke prolog/epilog.
+        [MethodImpl(MethodImplOptions.NoInlining)]
+        internal unsafe static void RhZeroMemory(ref byte b, nuint byteLength)
+        {
+            fixed (byte* bytePointer = &b)
+            {
+                RhZeroMemory(bytePointer, byteLength);
+            }
+        }
+
+        [DllImport(JitHelpers.QCall, CharSet = CharSet.Unicode)]
+        extern private unsafe static void RhZeroMemory(byte* b, nuint byteLength);
+
+        [MethodImpl(MethodImplOptions.InternalCall)]
+        internal extern unsafe static void RhBulkMoveWithWriteBarrier(ref byte destination, ref byte source, nuint byteCount);
+    }
+}