| #region Copyright notice and license |
| |
| // Copyright 2015 gRPC authors. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #endregion |
| |
| using System; |
| using System.Collections.Concurrent; |
| using System.Collections.Generic; |
| using System.Diagnostics; |
| using System.Runtime.InteropServices; |
| using System.Threading; |
| using Grpc.Core.Logging; |
| using Grpc.Core.Utils; |
| |
| namespace Grpc.Core.Internal |
| { |
| internal delegate void BatchCompletionDelegate(bool success, BatchContextSafeHandle ctx, object state); |
| |
| internal delegate void RequestCallCompletionDelegate(bool success, RequestCallContextSafeHandle ctx); |
| |
| internal class CompletionRegistry |
| { |
| static readonly ILogger Logger = GrpcEnvironment.Logger.ForType<CompletionRegistry>(); |
| |
| readonly GrpcEnvironment environment; |
| readonly Func<BatchContextSafeHandle> batchContextFactory; |
| readonly Dictionary<IntPtr, IOpCompletionCallback> dict = new Dictionary<IntPtr, IOpCompletionCallback>(new IntPtrComparer()); |
| SpinLock spinLock = new SpinLock(Debugger.IsAttached); |
| IntPtr lastRegisteredKey; // only for testing |
| |
| public CompletionRegistry(GrpcEnvironment environment, Func<BatchContextSafeHandle> batchContextFactory) |
| { |
| this.environment = GrpcPreconditions.CheckNotNull(environment); |
| this.batchContextFactory = GrpcPreconditions.CheckNotNull(batchContextFactory); |
| } |
| |
| public void Register(IntPtr key, IOpCompletionCallback callback) |
| { |
| environment.DebugStats.PendingBatchCompletions.Increment(); |
| |
| bool lockTaken = false; |
| try |
| { |
| spinLock.Enter(ref lockTaken); |
| |
| dict.Add(key, callback); |
| this.lastRegisteredKey = key; |
| } |
| finally |
| { |
| if (lockTaken) spinLock.Exit(); |
| } |
| } |
| |
| public BatchContextSafeHandle RegisterBatchCompletion(BatchCompletionDelegate callback, object state) |
| { |
| var ctx = batchContextFactory(); |
| ctx.SetCompletionCallback(callback, state); |
| Register(ctx.Handle, ctx); |
| return ctx; |
| } |
| |
| public void RegisterRequestCallCompletion(RequestCallContextSafeHandle ctx, RequestCallCompletionDelegate callback) |
| { |
| ctx.CompletionCallback = callback; |
| Register(ctx.Handle, ctx); |
| } |
| |
| public IOpCompletionCallback Extract(IntPtr key) |
| { |
| IOpCompletionCallback value = null; |
| bool lockTaken = false; |
| try |
| { |
| spinLock.Enter(ref lockTaken); |
| |
| value = dict[key]; |
| dict.Remove(key); |
| } |
| finally |
| { |
| if (lockTaken) spinLock.Exit(); |
| } |
| environment.DebugStats.PendingBatchCompletions.Decrement(); |
| return value; |
| } |
| |
| /// <summary> |
| /// For testing purposes only. NOT threadsafe. |
| /// </summary> |
| public IntPtr LastRegisteredKey |
| { |
| get { return this.lastRegisteredKey; } |
| } |
| |
| /// <summary> |
| /// IntPtr doesn't implement <c>IEquatable{IntPtr}</c> so we need to use custom comparer to avoid boxing. |
| /// </summary> |
| private class IntPtrComparer : IEqualityComparer<IntPtr> |
| { |
| public bool Equals(IntPtr x, IntPtr y) |
| { |
| return x == y; |
| } |
| |
| public int GetHashCode(IntPtr obj) |
| { |
| return obj.GetHashCode(); |
| } |
| } |
| } |
| } |