| #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.Collections.Concurrent; |
| using System.Diagnostics; |
| using System.IO; |
| using System.Runtime.InteropServices; |
| using System.Threading; |
| |
| namespace Grpc.Core.Internal |
| { |
| internal delegate void GprLogDelegate(IntPtr fileStringPtr, Int32 line, UInt64 threadId, IntPtr severityStringPtr, IntPtr msgPtr); |
| |
| /// <summary> |
| /// Logs from gRPC C core library can get lost if your application is not a console app. |
| /// This class allows redirection of logs to arbitrary destination. |
| /// </summary> |
| internal static class GrpcLog |
| { |
| static object staticLock = new object(); |
| static GprLogDelegate writeCallback; |
| static TextWriter dest; |
| |
| [DllImport("grpc_csharp_ext.dll")] |
| static extern void grpcsharp_redirect_log(GprLogDelegate callback); |
| |
| /// <summary> |
| /// Sets text writer as destination for logs from native gRPC C core library. |
| /// Only first invocation has effect. |
| /// </summary> |
| /// <param name="textWriter"></param> |
| public static void RedirectNativeLogs(TextWriter textWriter) |
| { |
| lock (staticLock) |
| { |
| if (writeCallback == null) |
| { |
| writeCallback = new GprLogDelegate(HandleWrite); |
| dest = textWriter; |
| grpcsharp_redirect_log(writeCallback); |
| } |
| } |
| } |
| |
| private static void HandleWrite(IntPtr fileStringPtr, Int32 line, UInt64 threadId, IntPtr severityStringPtr, IntPtr msgPtr) |
| { |
| try |
| { |
| // TODO: DateTime format used here is different than in C core. |
| dest.WriteLine(string.Format("{0}{1} {2} {3}:{4}: {5}", |
| Marshal.PtrToStringAnsi(severityStringPtr), DateTime.Now, |
| threadId, |
| Marshal.PtrToStringAnsi(fileStringPtr), |
| line, |
| Marshal.PtrToStringAnsi(msgPtr))); |
| } |
| catch (Exception e) |
| { |
| Console.WriteLine("Caught exception in native callback " + e); |
| } |
| } |
| } |
| } |