2 * Copyright (c) 2020 Samsung Electronics Co., Ltd All Rights Reserved
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
18 using System.ComponentModel;
19 using System.Runtime.InteropServices;
23 [EditorBrowsable(EditorBrowsableState.Never)]
24 internal sealed class SafeFrameProviderHandle : SafeHandle
26 [EditorBrowsable(EditorBrowsableState.Never)]
27 internal SafeFrameProviderHandle() : base(IntPtr.Zero, true)
31 [EditorBrowsable(EditorBrowsableState.Never)]
32 internal SafeFrameProviderHandle(IntPtr existingHandleValue, bool ownsHandle) : base(IntPtr.Zero, ownsHandle)
34 SetHandle(existingHandleValue);
37 [EditorBrowsable(EditorBrowsableState.Never)]
38 public override bool IsInvalid
42 return this.handle == IntPtr.Zero;
46 [EditorBrowsable(EditorBrowsableState.Never)]
47 protected override bool ReleaseHandle()
49 Interop.FrameProvider.DangerousDestroy(this.handle);
50 this.SetHandle(IntPtr.Zero);