| #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 System.Threading.Tasks; |
| using Grpc.Core.Internal; |
| using Grpc.Core.Logging; |
| using Grpc.Core.Utils; |
| |
| namespace Grpc.Core |
| { |
| /// <summary> |
| /// Encapsulates initialization and shutdown of gRPC library. |
| /// </summary> |
| public class GrpcEnvironment |
| { |
| const int THREAD_POOL_SIZE = 4; |
| |
| static object staticLock = new object(); |
| static GrpcEnvironment instance; |
| static int refCount; |
| |
| static ILogger logger = new ConsoleLogger(); |
| |
| readonly GrpcThreadPool threadPool; |
| readonly CompletionRegistry completionRegistry; |
| readonly DebugStats debugStats = new DebugStats(); |
| bool isClosed; |
| |
| /// <summary> |
| /// Returns a reference-counted instance of initialized gRPC environment. |
| /// Subsequent invocations return the same instance unless reference count has dropped to zero previously. |
| /// </summary> |
| internal static GrpcEnvironment AddRef() |
| { |
| lock (staticLock) |
| { |
| refCount++; |
| if (instance == null) |
| { |
| instance = new GrpcEnvironment(); |
| } |
| return instance; |
| } |
| } |
| |
| /// <summary> |
| /// Decrements the reference count for currently active environment and shuts down the gRPC environment if reference count drops to zero. |
| /// (and blocks until the environment has been fully shutdown). |
| /// </summary> |
| internal static void Release() |
| { |
| lock (staticLock) |
| { |
| GrpcPreconditions.CheckState(refCount > 0); |
| refCount--; |
| if (refCount == 0) |
| { |
| instance.Close(); |
| instance = null; |
| } |
| } |
| } |
| |
| internal static int GetRefCount() |
| { |
| lock (staticLock) |
| { |
| return refCount; |
| } |
| } |
| |
| /// <summary> |
| /// Gets application-wide logger used by gRPC. |
| /// </summary> |
| /// <value>The logger.</value> |
| public static ILogger Logger |
| { |
| get |
| { |
| return logger; |
| } |
| } |
| |
| /// <summary> |
| /// Sets the application-wide logger that should be used by gRPC. |
| /// </summary> |
| public static void SetLogger(ILogger customLogger) |
| { |
| GrpcPreconditions.CheckNotNull(customLogger, "customLogger"); |
| logger = customLogger; |
| } |
| |
| /// <summary> |
| /// Creates gRPC environment. |
| /// </summary> |
| private GrpcEnvironment() |
| { |
| GrpcNativeInit(); |
| completionRegistry = new CompletionRegistry(this); |
| threadPool = new GrpcThreadPool(this, THREAD_POOL_SIZE); |
| threadPool.Start(); |
| } |
| |
| /// <summary> |
| /// Gets the completion registry used by this gRPC environment. |
| /// </summary> |
| internal CompletionRegistry CompletionRegistry |
| { |
| get |
| { |
| return this.completionRegistry; |
| } |
| } |
| |
| /// <summary> |
| /// Gets the completion queue used by this gRPC environment. |
| /// </summary> |
| internal CompletionQueueSafeHandle CompletionQueue |
| { |
| get |
| { |
| return this.threadPool.CompletionQueue; |
| } |
| } |
| |
| /// <summary> |
| /// Gets the completion queue used by this gRPC environment. |
| /// </summary> |
| internal DebugStats DebugStats |
| { |
| get |
| { |
| return this.debugStats; |
| } |
| } |
| |
| /// <summary> |
| /// Gets version of gRPC C core. |
| /// </summary> |
| internal static string GetCoreVersionString() |
| { |
| var ptr = NativeMethods.Get().grpcsharp_version_string(); // the pointer is not owned |
| return Marshal.PtrToStringAnsi(ptr); |
| } |
| |
| internal static void GrpcNativeInit() |
| { |
| NativeMethods.Get().grpcsharp_init(); |
| } |
| |
| internal static void GrpcNativeShutdown() |
| { |
| NativeMethods.Get().grpcsharp_shutdown(); |
| } |
| |
| /// <summary> |
| /// Shuts down this environment. |
| /// </summary> |
| private void Close() |
| { |
| if (isClosed) |
| { |
| throw new InvalidOperationException("Close has already been called"); |
| } |
| threadPool.Stop(); |
| GrpcNativeShutdown(); |
| isClosed = true; |
| |
| debugStats.CheckOK(); |
| } |
| } |
| } |