Initial checkin of gRPC to third_party/

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

+#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.Collections.Concurrent;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+using Grpc.Core.Utils;
+
+namespace Grpc.Core.Internal
+{
+    /// <summary>
+    /// grpc_server from grpc/grpc.h
+    /// </summary>
+    internal sealed class ServerSafeHandle : SafeHandleZeroIsInvalid
+    {
+        static readonly NativeMethods Native = NativeMethods.Get();
+
+        private ServerSafeHandle()
+        {
+        }
+
+        public static ServerSafeHandle NewServer(CompletionQueueSafeHandle cq, ChannelArgsSafeHandle args)
+        {
+            // Increment reference count for the native gRPC environment to make sure we don't do grpc_shutdown() before destroying the server handle.
+            // Doing so would make object finalizer crash if we end up abandoning the handle.
+            GrpcEnvironment.GrpcNativeInit();
+            return Native.grpcsharp_server_create(cq, args);
+        }
+
+        public int AddInsecurePort(string addr)
+        {
+            return Native.grpcsharp_server_add_insecure_http2_port(this, addr);
+        }
+
+        public int AddSecurePort(string addr, ServerCredentialsSafeHandle credentials)
+        {
+            return Native.grpcsharp_server_add_secure_http2_port(this, addr, credentials);
+        }
+
+        public void Start()
+        {
+            Native.grpcsharp_server_start(this);
+        }
+    
+        public void ShutdownAndNotify(BatchCompletionDelegate callback, GrpcEnvironment environment)
+        {
+            var ctx = BatchContextSafeHandle.Create();
+            environment.CompletionRegistry.RegisterBatchCompletion(ctx, callback);
+            Native.grpcsharp_server_shutdown_and_notify_callback(this, environment.CompletionQueue, ctx);
+        }
+
+        public void RequestCall(BatchCompletionDelegate callback, GrpcEnvironment environment)
+        {
+            var ctx = BatchContextSafeHandle.Create();
+            environment.CompletionRegistry.RegisterBatchCompletion(ctx, callback);
+            Native.grpcsharp_server_request_call(this, environment.CompletionQueue, ctx).CheckOk();
+        }
+
+        protected override bool ReleaseHandle()
+        {
+            Native.grpcsharp_server_destroy(handle);
+            GrpcEnvironment.GrpcNativeShutdown();
+            return true;
+        }
+            
+        // Only to be called after ShutdownAndNotify.
+        public void CancelAllCalls()
+        {
+            Native.grpcsharp_server_cancel_all_calls(this);
+        }
+    }
+}