Tizen.Runtime/Tizen.Runtime/AssemblyLoader.cs

   1 using System;
   2 using System.IO;
   3 using System.Reflection;
   4 using System.Runtime.Loader;
   5 using System.Collections.Generic;
   6
   7 namespace Tizen.Runtime
   8 {
   9     public class AssemblyLoader : AssemblyLoadContext
  10     {
  11         private SortedSet<string> _dllDirectories = new SortedSet<string>();
  12         private SortedSet<string> _nativeDirectories = new SortedSet<string>();
  13
  14         public IEnumerable<string> DllDirectories
  15         {
  16             get { return _dllDirectories; }
  17         }
  18
  19         public IEnumerable<string> NativeDirectories
  20         {
  21             get { return _nativeDirectories; }
  22         }
  23
  24         public void AddSearchableDirectory(string directory)
  25         {
  26             if (Directory.Exists(directory))
  27             {
  28                 _dllDirectories.Add(directory);
  29                 _nativeDirectories.Add(directory);
  30             }
  31         }
  32
  33         public void RemoveSearchableDirectory(string directory)
  34         {
  35             _dllDirectories.Remove(directory);
  36             _nativeDirectories.Remove(directory);
  37         }
  38
  39         protected override Assembly Load(AssemblyName assemblyName)
  40         {
  41             ALog.Debug($"Load DLL : {assemblyName.Name}");
  42             Assembly asm = null;
  43
  44             try
  45             {
  46                 asm = Assembly.Load(assemblyName);
  47             }
  48             catch (Exception ex)
  49                 when (ex is FileNotFoundException ||
  50                         ex is BadImageFormatException ||
  51                         ex is FileLoadException)
  52             {
  53                 ALog.Debug("Search DLL in added directories");
  54                 foreach (string dir in DllDirectories)
  55                 {
  56                     FileInfo f = new FileInfo(Path.Combine(dir, $"{assemblyName.Name}.dll"));
  57                     if (File.Exists(f.FullName))
  58                     {
  59                         asm = LoadFromAssemblyPath(f.FullName);
  60                         break;
  61                     }
  62                 }
  63             }
  64             return asm;
  65         }
  66
  67         protected override IntPtr LoadUnmanagedDll(string unmanagedDllName)
  68         {
  69             ALog.Debug($"Load Native : {unmanagedDllName}");
  70             IntPtr native = base.LoadUnmanagedDll(unmanagedDllName);
  71             if (native == IntPtr.Zero)
  72             {
  73                 ALog.Debug("Search native lib in added directories");
  74                 foreach (string dir in NativeDirectories)
  75                 {
  76                     FileInfo f = new FileInfo(Path.Combine(dir, unmanagedDllName));
  77                     if (File.Exists(f.FullName))
  78                     {
  79                         native = LoadUnmanagedDllFromPath(f.FullName);
  80                         break;
  81                     }
  82                 }
  83             }
  84
  85             return native;
  86         }
  87     }
  88 }