path: root/src/mscorlib/shared/Interop/Windows/Kernel32/Interop.WriteFile_SafeHandle_NativeOverlapped.cs
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Diffstat (limited to 'src/mscorlib/shared/Interop/Windows/Kernel32/Interop.WriteFile_SafeHandle_NativeOverlapped.cs')
1 files changed, 22 insertions, 0 deletions
diff --git a/src/mscorlib/shared/Interop/Windows/Kernel32/Interop.WriteFile_SafeHandle_NativeOverlapped.cs b/src/mscorlib/shared/Interop/Windows/Kernel32/Interop.WriteFile_SafeHandle_NativeOverlapped.cs
new file mode 100644
index 0000000000..dc1e97555b
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+++ b/src/mscorlib/shared/Interop/Windows/Kernel32/Interop.WriteFile_SafeHandle_NativeOverlapped.cs
@@ -0,0 +1,22 @@
+// 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 Microsoft.Win32.SafeHandles;
+using System;
+using System.Runtime.InteropServices;
+using System.Threading;
+internal partial class Interop
+ internal partial class Kernel32
+ {
+ // Note there are two different WriteFile prototypes - this is to use
+ // the type system to force you to not trip across a "feature" in
+ // Win32's async IO support. You can't do the following three things
+ // simultaneously: overlapped IO, free the memory for the overlapped
+ // struct in a callback (or an EndWrite method called by that callback),
+ // and pass in an address for the numBytesRead parameter.
+ [DllImport(Libraries.Kernel32, SetLastError = true)]
+ internal static extern unsafe int WriteFile(SafeHandle handle, byte* bytes, int numBytesToWrite, IntPtr numBytesWritten_mustBeZero, NativeOverlapped* lpOverlapped);
+ }