Initial checkin of gRPC to third_party/

third_party/grpc/src/csharp/Grpc.Core/Internal/BatchContextSafeHandle.cs

Index: third_party/grpc/src/csharp/Grpc.Core/Internal/BatchContextSafeHandle.cs
diff --git a/third_party/grpc/src/csharp/Grpc.Core/Internal/BatchContextSafeHandle.cs b/third_party/grpc/src/csharp/Grpc.Core/Internal/BatchContextSafeHandle.cs
new file mode 100644
index 0000000000000000000000000000000000000000..0e2108f0f2e4564c92c9ce46443b8040a943bd74
--- /dev/null
+++ b/third_party/grpc/src/csharp/Grpc.Core/Internal/BatchContextSafeHandle.cs
@@ -0,0 +1,226 @@
+#region Copyright notice and license
+
+// Copyright 2015-2016, 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 Grpc.Core;
+
+namespace Grpc.Core.Internal
+{
+    /// <summary>
+    /// grpcsharp_batch_context
+    /// </summary>
+    internal class BatchContextSafeHandle : SafeHandleZeroIsInvalid
+    {
+        static readonly NativeMethods Native = NativeMethods.Get();
+
+        private BatchContextSafeHandle()
+        {
+        }
+
+        public static BatchContextSafeHandle Create()
+        {
+            return Native.grpcsharp_batch_context_create();
+        }
+
+        public IntPtr Handle
+        {
+            get
+            {
+                return handle;
+            }
+        }
+
+        // Gets data of recv_initial_metadata completion.
+        public Metadata GetReceivedInitialMetadata()
+        {
+            IntPtr metadataArrayPtr = Native.grpcsharp_batch_context_recv_initial_metadata(this);
+            return MetadataArraySafeHandle.ReadMetadataFromPtrUnsafe(metadataArrayPtr);
+        }
+            
+        // Gets data of recv_status_on_client completion.
+        public ClientSideStatus GetReceivedStatusOnClient()
+        {
+            string details = Marshal.PtrToStringAnsi(Native.grpcsharp_batch_context_recv_status_on_client_details(this));
+            var status = new Status(Native.grpcsharp_batch_context_recv_status_on_client_status(this), details);
+
+            IntPtr metadataArrayPtr = Native.grpcsharp_batch_context_recv_status_on_client_trailing_metadata(this);
+            var metadata = MetadataArraySafeHandle.ReadMetadataFromPtrUnsafe(metadataArrayPtr);
+
+            return new ClientSideStatus(status, metadata);
+        }
+
+        // Gets data of recv_message completion.
+        public byte[] GetReceivedMessage()
+        {
+            IntPtr len = Native.grpcsharp_batch_context_recv_message_length(this);
+            if (len == new IntPtr(-1))
+            {
+                return null;
+            }
+            byte[] data = new byte[(int)len];
+            Native.grpcsharp_batch_context_recv_message_to_buffer(this, data, new UIntPtr((ulong)data.Length));
+            return data;
+        }
+
+        // Gets data of server_rpc_new completion.
+        public ServerRpcNew GetServerRpcNew(Server server)
+        {
+            var call = Native.grpcsharp_batch_context_server_rpc_new_call(this);
+
+            var method = Marshal.PtrToStringAnsi(Native.grpcsharp_batch_context_server_rpc_new_method(this));
+            var host = Marshal.PtrToStringAnsi(Native.grpcsharp_batch_context_server_rpc_new_host(this));
+            var deadline = Native.grpcsharp_batch_context_server_rpc_new_deadline(this);
+
+            IntPtr metadataArrayPtr = Native.grpcsharp_batch_context_server_rpc_new_request_metadata(this);
+            var metadata = MetadataArraySafeHandle.ReadMetadataFromPtrUnsafe(metadataArrayPtr);
+
+            return new ServerRpcNew(server, call, method, host, deadline, metadata);
+        }
+
+        // Gets data of receive_close_on_server completion.
+        public bool GetReceivedCloseOnServerCancelled()
+        {
+            return Native.grpcsharp_batch_context_recv_close_on_server_cancelled(this) != 0;
+        }
+            
+        protected override bool ReleaseHandle()
+        {
+            Native.grpcsharp_batch_context_destroy(handle);
+            return true;
+        }
+    }
+
+    /// <summary>
+    /// Status + metadata received on client side when call finishes.
+    /// (when receive_status_on_client operation finishes).
+    /// </summary>
+    internal struct ClientSideStatus
+    {
+        readonly Status status;
+        readonly Metadata trailers;
+
+        public ClientSideStatus(Status status, Metadata trailers)
+        {
+            this.status = status;
+            this.trailers = trailers;
+        }
+
+        public Status Status
+        {
+            get
+            {
+                return this.status;
+            }    
+        }
+
+        public Metadata Trailers
+        {
+            get
+            {
+                return this.trailers;
+            }
+        }
+    }
+
+    /// <summary>
+    /// Details of a newly received RPC.
+    /// </summary>
+    internal struct ServerRpcNew
+    {
+        readonly Server server;
+        readonly CallSafeHandle call;
+        readonly string method;
+        readonly string host;
+        readonly Timespec deadline;
+        readonly Metadata requestMetadata;
+
+        public ServerRpcNew(Server server, CallSafeHandle call, string method, string host, Timespec deadline, Metadata requestMetadata)
+        {
+            this.server = server;
+            this.call = call;
+            this.method = method;
+            this.host = host;
+            this.deadline = deadline;
+            this.requestMetadata = requestMetadata;
+        }
+
+        public Server Server
+        {
+            get
+            {
+                return this.server;
+            }
+        }
+
+        public CallSafeHandle Call
+        {
+            get
+            {
+                return this.call;
+            }
+        }
+
+        public string Method
+        {
+            get
+            {
+                return this.method;
+            }
+        }
+
+        public string Host
+        {
+            get
+            {
+                return this.host;
+            }
+        }
+
+        public Timespec Deadline
+        {
+            get
+            {
+                return this.deadline;
+            }
+        }
+
+        public Metadata RequestMetadata
+        {
+            get
+            {
+                return this.requestMetadata;
+            }
+        }
+    }
+}