| #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.IO; |
| using System.Reflection; |
| |
| using Grpc.Core.Logging; |
| |
| namespace Grpc.Core.Internal |
| { |
| /// <summary> |
| /// Takes care of loading C# native extension and provides access to PInvoke calls the library exports. |
| /// </summary> |
| internal sealed class NativeExtension |
| { |
| const string NativeLibrariesDir = "nativelibs"; |
| |
| static readonly ILogger Logger = GrpcEnvironment.Logger.ForType<NativeExtension>(); |
| static readonly object staticLock = new object(); |
| static volatile NativeExtension instance; |
| |
| readonly NativeMethods nativeMethods; |
| |
| private NativeExtension() |
| { |
| this.nativeMethods = new NativeMethods(Load()); |
| |
| // Redirect the the native logs as the very first thing after loading the native extension |
| // to make sure we don't lose any logs. |
| NativeLogRedirector.Redirect(this.nativeMethods); |
| |
| DefaultSslRootsOverride.Override(this.nativeMethods); |
| |
| Logger.Debug("gRPC native library loaded successfully."); |
| } |
| |
| /// <summary> |
| /// Gets singleton instance of this class. |
| /// The native extension is loaded when called for the first time. |
| /// </summary> |
| public static NativeExtension Get() |
| { |
| if (instance == null) |
| { |
| lock (staticLock) |
| { |
| if (instance == null) { |
| instance = new NativeExtension(); |
| } |
| } |
| } |
| return instance; |
| } |
| |
| /// <summary> |
| /// Provides access to the exported native methods. |
| /// </summary> |
| public NativeMethods NativeMethods |
| { |
| get { return this.nativeMethods; } |
| } |
| |
| /// <summary> |
| /// Detects which configuration of native extension to load and load it. |
| /// </summary> |
| private static UnmanagedLibrary Load() |
| { |
| // TODO: allow customizing path to native extension (possibly through exposing a GrpcEnvironment property). |
| |
| var libraryFlavor = string.Format("{0}_{1}", GetPlatformString(), GetArchitectureString()); |
| var fullPath = Path.Combine(GetExecutingAssemblyDirectory(), |
| NativeLibrariesDir, libraryFlavor, GetNativeLibraryFilename()); |
| return new UnmanagedLibrary(fullPath); |
| } |
| |
| private static string GetExecutingAssemblyDirectory() |
| { |
| return Path.GetDirectoryName(typeof(NativeExtension).GetTypeInfo().Assembly.Location); |
| } |
| |
| private static string GetPlatformString() |
| { |
| if (PlatformApis.IsWindows) |
| { |
| return "windows"; |
| } |
| if (PlatformApis.IsLinux) |
| { |
| return "linux"; |
| } |
| if (PlatformApis.IsMacOSX) |
| { |
| return "macosx"; |
| } |
| throw new InvalidOperationException("Unsupported platform."); |
| } |
| |
| // Currently, only Intel platform is supported. |
| private static string GetArchitectureString() |
| { |
| if (PlatformApis.Is64Bit) |
| { |
| return "x64"; |
| } |
| else |
| { |
| return "x86"; |
| } |
| } |
| |
| // platform specific file name of the extension library |
| private static string GetNativeLibraryFilename() |
| { |
| if (PlatformApis.IsWindows) |
| { |
| return "grpc_csharp_ext.dll"; |
| } |
| if (PlatformApis.IsLinux) |
| { |
| return "libgrpc_csharp_ext.so"; |
| } |
| if (PlatformApis.IsMacOSX) |
| { |
| return "libgrpc_csharp_ext.dylib"; |
| } |
| throw new InvalidOperationException("Unsupported platform."); |
| } |
| } |
| } |