diff options
Diffstat (limited to 'src/csharp/Grpc.Core/Internal/UnmanagedLibrary.cs')
-rw-r--r-- | src/csharp/Grpc.Core/Internal/UnmanagedLibrary.cs | 29 |
1 files changed, 25 insertions, 4 deletions
diff --git a/src/csharp/Grpc.Core/Internal/UnmanagedLibrary.cs b/src/csharp/Grpc.Core/Internal/UnmanagedLibrary.cs index dc629bd714..31e1402849 100644 --- a/src/csharp/Grpc.Core/Internal/UnmanagedLibrary.cs +++ b/src/csharp/Grpc.Core/Internal/UnmanagedLibrary.cs @@ -44,10 +44,9 @@ namespace Grpc.Core.Internal { /// <summary> /// Represents a dynamically loaded unmanaged library in a (partially) platform independent manner. - /// An important difference in library loading semantics is that on Windows, once we load a dynamic library using LoadLibrary, - /// that library becomes instantly available for <c>DllImport</c> P/Invoke calls referring to the same library name. - /// On Unix systems, dlopen has somewhat different semantics, so we need to use dlsym and <c>Marshal.GetDelegateForFunctionPointer</c> - /// to obtain delegates to native methods. + /// First, the native library is loaded using dlopen (on Unix systems) or using LoadLibrary (on Windows). + /// dlsym or GetProcAddress are then used to obtain symbol addresses. <c>Marshal.GetDelegateForFunctionPointer</c> + /// transforms the addresses into delegates to native methods. /// See http://stackoverflow.com/questions/13461989/p-invoke-to-dynamically-loaded-library-on-mono. /// </summary> internal class UnmanagedLibrary @@ -114,6 +113,10 @@ namespace Grpc.Core.Internal { return Mono.dlsym(this.handle, symbolName); } + if (PlatformApis.IsNetCore) + { + return CoreCLR.dlsym(this.handle, symbolName); + } return Linux.dlsym(this.handle, symbolName); } if (PlatformApis.IsMacOSX) @@ -149,6 +152,10 @@ namespace Grpc.Core.Internal { return Mono.dlopen(libraryPath, RTLD_GLOBAL + RTLD_LAZY); } + if (PlatformApis.IsNetCore) + { + return CoreCLR.dlopen(libraryPath, RTLD_GLOBAL + RTLD_LAZY); + } return Linux.dlopen(libraryPath, RTLD_GLOBAL + RTLD_LAZY); } if (PlatformApis.IsMacOSX) @@ -215,5 +222,19 @@ namespace Grpc.Core.Internal [DllImport("__Internal")] internal static extern IntPtr dlsym(IntPtr handle, string symbol); } + + /// <summary> + /// Similarly as for Mono on Linux, we load symbols for + /// dlopen and dlsym from the "libcoreclr.so", + /// to avoid the dependency on libc-dev Linux. + /// </summary> + private static class CoreCLR + { + [DllImport("libcoreclr.so")] + internal static extern IntPtr dlopen(string filename, int flags); + + [DllImport("libcoreclr.so")] + internal static extern IntPtr dlsym(IntPtr handle, string symbol); + } } } |