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Diffstat (limited to 'src/mscorlib/shared/Interop/Unix/System.Native/Interop.FLock.cs')
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diff --git a/src/mscorlib/shared/Interop/Unix/System.Native/Interop.FLock.cs b/src/mscorlib/shared/Interop/Unix/System.Native/Interop.FLock.cs
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index 0000000000..22934a3e77
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+++ b/src/mscorlib/shared/Interop/Unix/System.Native/Interop.FLock.cs
@@ -0,0 +1,31 @@
+// 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 Sys
+ {
+ internal enum LockOperations : int
+ {
+ LOCK_SH = 1, /* shared lock */
+ LOCK_EX = 2, /* exclusive lock */
+ LOCK_NB = 4, /* don't block when locking*/
+ LOCK_UN = 8, /* unlock */
+ }
+
+ [DllImport(Libraries.SystemNative, EntryPoint = "SystemNative_FLock", SetLastError = true)]
+ internal static extern int FLock(SafeFileHandle fd, LockOperations operation);
+
+ /// <summary>
+ /// Exposing this for SafeFileHandle.ReleaseHandle() to call.
+ /// Normal callers should use FLock(SafeFileHandle fd).
+ /// </summary>
+ [DllImport(Libraries.SystemNative, EntryPoint = "SystemNative_FLock", SetLastError = true)]
+ internal static extern int FLock(IntPtr fd, LockOperations operation);
+ }
+}