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