init commit

desktop_global/VideoReader/InteropHelper.cs

@@ -0,0 +1,40 @@
+using System;
+using System.IO;
+using System.Runtime.InteropServices;
+
+namespace VideoReader;
+
+public class InteropHelper
+{
+	public const string LD_LIBRARY_PATH = "LD_LIBRARY_PATH";
+
+	public static void RegisterLibrariesSearchPath(string path)
+	{
+		switch (Environment.OSVersion.Platform)
+		{
+		case PlatformID.Win32S:
+		case PlatformID.Win32Windows:
+		case PlatformID.Win32NT:
+			SetDllDirectory(path);
+			break;
+		case PlatformID.Unix:
+		case PlatformID.MacOSX:
+		{
+			string environmentVariable = Environment.GetEnvironmentVariable("LD_LIBRARY_PATH");
+			if (!string.IsNullOrWhiteSpace(environmentVariable) && !environmentVariable.Contains(path))
+			{
+				char pathSeparator = Path.PathSeparator;
+				string value = environmentVariable + pathSeparator + path;
+				Environment.SetEnvironmentVariable("LD_LIBRARY_PATH", value);
+			}
+			break;
+		}
+		case PlatformID.WinCE:
+		case PlatformID.Xbox:
+			break;
+		}
+	}
+
+	[DllImport("kernel32", SetLastError = true)]
+	private static extern bool SetDllDirectory(string lpPathName);
+}