diff options
Diffstat (limited to 'src/csharp/Grpc.Core/Internal/UnmanagedLibrary.cs')
| -rw-r--r-- | src/csharp/Grpc.Core/Internal/UnmanagedLibrary.cs | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/src/csharp/Grpc.Core/Internal/UnmanagedLibrary.cs b/src/csharp/Grpc.Core/Internal/UnmanagedLibrary.cs index 5a80746101..dc629bd714 100644 --- a/src/csharp/Grpc.Core/Internal/UnmanagedLibrary.cs +++ b/src/csharp/Grpc.Core/Internal/UnmanagedLibrary.cs @@ -82,6 +82,32 @@ namespace Grpc.Core.Internal /// <returns></returns> public IntPtr LoadSymbol(string symbolName) { + if (PlatformApis.IsWindows) + { + // See http://stackoverflow.com/questions/10473310 for background on this. + if (PlatformApis.Is64Bit) + { + return Windows.GetProcAddress(this.handle, symbolName); + } + else + { + // Yes, we could potentially predict the size... but it's a lot simpler to just try + // all the candidates. Most functions have a suffix of @0, @4 or @8 so we won't be trying + // many options - and if it takes a little bit longer to fail if we've really got the wrong + // library, that's not a big problem. This is only called once per function in the native library. + symbolName = "_" + symbolName + "@"; + for (int stackSize = 0; stackSize < 128; stackSize += 4) + { + IntPtr candidate = Windows.GetProcAddress(this.handle, symbolName + stackSize); + if (candidate != IntPtr.Zero) + { + return candidate; + } + } + // Fail. + return IntPtr.Zero; + } + } if (PlatformApis.IsLinux) { if (PlatformApis.IsMono) @@ -142,13 +168,18 @@ namespace Grpc.Core.Internal return path; } } - throw new FileNotFoundException(String.Format("Error loading native library. Not found in any of the possible locations {0}", libraryPathAlternatives)); + throw new FileNotFoundException( + String.Format("Error loading native library. Not found in any of the possible locations: {0}", + string.Join(",", libraryPathAlternatives))); } private static class Windows { [DllImport("kernel32.dll")] internal static extern IntPtr LoadLibrary(string filename); + + [DllImport("kernel32.dll")] + internal static extern IntPtr GetProcAddress(IntPtr hModule, string procName); } private static class Linux |