1 #region Copyright notice and license
2 
3 // Copyright 2015 gRPC authors.
4 //
5 // Licensed under the Apache License, Version 2.0 (the "License");
6 // you may not use this file except in compliance with the License.
7 // You may obtain a copy of the License at
8 //
9 //     http://www.apache.org/licenses/LICENSE-2.0
10 //
11 // Unless required by applicable law or agreed to in writing, software
12 // distributed under the License is distributed on an "AS IS" BASIS,
13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 // See the License for the specific language governing permissions and
15 // limitations under the License.
16 
17 #endregion
18 
19 using System;
20 using System.Runtime.InteropServices;
21 
22 namespace Grpc.Core.Internal
23 {
24     /// <summary>
25     /// Safe handle to wrap native objects.
26     /// </summary>
27     internal abstract class SafeHandleZeroIsInvalid : System.Runtime.InteropServices.SafeHandle
28     {
SafeHandleZeroIsInvalid()29         public SafeHandleZeroIsInvalid() : base(IntPtr.Zero, true)
30         {
31         }
32 
33         public override bool IsInvalid
34         {
35             get
36             {
37                 return handle == IntPtr.Zero;
38             }
39         }
40     }
41 }
42