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// 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);
}
}
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