Diffstat (limited to 'src/mscorlib/corefx/Interop/Windows/kernel32/Interop.WriteFile_SafeHandle_NativeOverlapped.cs')
1 files changed, 22 insertions, 0 deletions
diff --git a/src/mscorlib/corefx/Interop/Windows/kernel32/Interop.WriteFile_SafeHandle_NativeOverlapped.cs b/src/mscorlib/corefx/Interop/Windows/kernel32/Interop.WriteFile_SafeHandle_NativeOverlapped.cs
new file mode 100644
@@ -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.
+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);