| #region Copyright notice and license |
| // Copyright 2015, Google Inc. |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| #endregion |
| using System; |
| using System.Runtime.InteropServices; |
| using System.Threading.Tasks; |
| using Grpc.Core.Profiling; |
| |
| namespace Grpc.Core.Internal |
| { |
| /// <summary> |
| /// grpc_metadata_array from <c>grpc/grpc.h</c> |
| /// </summary> |
| internal class MetadataArraySafeHandle : SafeHandleZeroIsInvalid |
| { |
| static readonly NativeMethods Native = NativeMethods.Get(); |
| |
| private MetadataArraySafeHandle() |
| { |
| } |
| |
| public static MetadataArraySafeHandle Create(Metadata metadata) |
| { |
| if (metadata.Count == 0) |
| { |
| return new MetadataArraySafeHandle(); |
| } |
| |
| // TODO(jtattermusch): we might wanna check that the metadata is readonly |
| var metadataArray = Native.grpcsharp_metadata_array_create(new UIntPtr((ulong)metadata.Count)); |
| for (int i = 0; i < metadata.Count; i++) |
| { |
| var valueBytes = metadata[i].GetSerializedValueUnsafe(); |
| Native.grpcsharp_metadata_array_add(metadataArray, metadata[i].Key, valueBytes, new UIntPtr((ulong)valueBytes.Length)); |
| } |
| return metadataArray; |
| } |
| |
| /// <summary> |
| /// Reads metadata from pointer to grpc_metadata_array |
| /// </summary> |
| public static Metadata ReadMetadataFromPtrUnsafe(IntPtr metadataArray) |
| { |
| if (metadataArray == IntPtr.Zero) |
| { |
| return null; |
| } |
| |
| ulong count = Native.grpcsharp_metadata_array_count(metadataArray).ToUInt64(); |
| |
| var metadata = new Metadata(); |
| for (ulong i = 0; i < count; i++) |
| { |
| var index = new UIntPtr(i); |
| string key = Marshal.PtrToStringAnsi(Native.grpcsharp_metadata_array_get_key(metadataArray, index)); |
| var bytes = new byte[Native.grpcsharp_metadata_array_get_value_length(metadataArray, index).ToUInt64()]; |
| Marshal.Copy(Native.grpcsharp_metadata_array_get_value(metadataArray, index), bytes, 0, bytes.Length); |
| metadata.Add(Metadata.Entry.CreateUnsafe(key, bytes)); |
| } |
| return metadata; |
| } |
| |
| internal IntPtr Handle |
| { |
| get |
| { |
| return handle; |
| } |
| } |
| |
| protected override bool ReleaseHandle() |
| { |
| Native.grpcsharp_metadata_array_destroy_full(handle); |
| return true; |
| } |
| } |
| } |