1 files changed, 27 insertions, 0 deletions
diff --git a/src/mscorlib/corefx/Interop/Windows/mincore/Interop.ThreadPoolIO.cs b/src/mscorlib/corefx/Interop/Windows/mincore/Interop.ThreadPoolIO.cs
new file mode 100644
index 0000000000..a0afed5d1a
--- /dev/null
+++ b/src/mscorlib/corefx/Interop/Windows/mincore/Interop.ThreadPoolIO.cs
@@ -0,0 +1,27 @@
+// 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;
+using System.Runtime.InteropServices;
+using Microsoft.Win32.SafeHandles;
+
+internal static partial class Interop
+{
+    internal static partial class mincore
+    {
+        [DllImport(Libraries.ThreadPool, SetLastError = true)]
+        internal static unsafe extern SafeThreadPoolIOHandle CreateThreadpoolIo(SafeHandle fl, [MarshalAs(UnmanagedType.FunctionPtr)] NativeIoCompletionCallback pfnio, IntPtr context, IntPtr pcbe);
+
+        [DllImport(Libraries.ThreadPool)]
+        internal static unsafe extern void CloseThreadpoolIo(IntPtr pio);
+
+        [DllImport(Libraries.ThreadPool)]
+        internal static unsafe extern void StartThreadpoolIo(SafeThreadPoolIOHandle pio);
+
+        [DllImport(Libraries.ThreadPool)]
+        internal static unsafe extern void CancelThreadpoolIo(SafeThreadPoolIOHandle pio);
+    }
+
+    internal delegate void NativeIoCompletionCallback(IntPtr instance, IntPtr context, IntPtr overlapped, uint ioResult, UIntPtr numberOfBytesTransferred, IntPtr io);
+}