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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.
namespace Windows.Win32;
/// <summary>
/// Helper to scope lifetime of a GDI object. Deletes the given object (if any) when disposed.
/// </summary>
/// <remarks>
/// <para>
/// Use in a <see langword="using" /> statement. If you must pass this around, always pass
/// by <see langword="ref" /> to avoid duplicating the handle and risking a double deletion.
/// </para>
/// </remarks>
#if DEBUG
internal class ObjectScope : DisposalTracking.Tracker, IDisposable
#else
internal readonly ref struct ObjectScope
#endif
{
public HGDIOBJ HGDIOBJ { get; }
/// <param name="object">The object to be deleted when the scope closes.</param>
public ObjectScope(HGDIOBJ @object) => HGDIOBJ = @object;
public static implicit operator HGDIOBJ(in ObjectScope objectScope) => objectScope.HGDIOBJ;
public void Dispose()
{
if (!HGDIOBJ.IsNull)
{
PInvokeCore.DeleteObject(HGDIOBJ);
}
DisposalTracking.SuppressFinalize(this!);
}
}
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