src/Tizen.NUI.Gadget/Tizen.NUI/NUIGadgetAssembly.cs

   1 /*
   2 * Copyright (c) 2024 Samsung Electronics Co., Ltd All Rights Reserved
   3 *
   4 * Licensed under the Apache License, Version 2.0 (the License);
   5 * you may not use this file except in compliance with the License.
   6 * You may obtain a copy of the License at
   7 *
   8 * http://www.apache.org/licenses/LICENSE-2.0
   9 *
  10 * Unless required by applicable law or agreed to in writing, software
  11 * distributed under the License is distributed on an AS IS BASIS,
  12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13 * See the License for the specific language governing permissions and
  14 * limitations under the License.
  15 */
  16
  17 using System;
  18 using System.IO;
  19 using System.Reflection;
  20 using System.Runtime.Loader;
  21
  22 using SystemIO = System.IO;
  23
  24 namespace Tizen.NUI
  25 {
  26     internal class NUIGadgetAssemblyLoadContext : AssemblyLoadContext
  27     {
  28         public NUIGadgetAssemblyLoadContext() : base(isCollectible: true)
  29         {
  30         }
  31
  32         protected override Assembly Load(AssemblyName name)
  33         {
  34             return null;
  35         }
  36     }
  37
  38     internal class NUIGadgetAssembly
  39     {
  40         private static readonly object _assemblyLock = new object();
  41         private readonly string _assemblyPath;
  42         private WeakReference _assemblyRef;
  43         private Assembly _assembly = null;
  44
  45         public NUIGadgetAssembly(string assemblyPath) { _assemblyPath = assemblyPath; }
  46
  47         public void Load()
  48         {
  49             lock (_assemblyLock)
  50             {
  51                 if (_assembly != null)
  52                 {
  53                     return;
  54                 }
  55
  56                 Log.Warn("Load(): " + _assemblyPath + " ++");
  57                 NUIGadgetAssemblyLoadContext context = new NUIGadgetAssemblyLoadContext();
  58                 _assemblyRef = new WeakReference(context);
  59                 string directoryPath = SystemIO.Path.GetDirectoryName(_assemblyPath);
  60                 string fileName = SystemIO.Path.GetFileNameWithoutExtension(_assemblyPath);
  61                 string nativeImagePath = directoryPath + "/" + fileName + ".ni.dll";
  62                 Log.Debug("NativeImagePath=" + nativeImagePath + ", AssemblyPath=" + _assemblyPath);
  63                 _assembly = context.LoadFromNativeImagePath(nativeImagePath, _assemblyPath);
  64                 Log.Warn("Load(): " + _assemblyPath + " --");
  65             }
  66         }
  67
  68         public bool IsLoaded { get { return _assembly != null; } }
  69
  70         public NUIGadget CreateInstance(string className)
  71         {
  72             lock (_assemblyLock)
  73             {
  74                 return (NUIGadget)_assembly?.CreateInstance(className);
  75             }
  76         }
  77
  78         public void Unload()
  79         {
  80             lock (_assemblyLock)
  81             {
  82                 if (_assembly == null)
  83                 {
  84                     return;
  85                 }
  86
  87                 Log.Warn("Unload(): " + _assemblyPath + " ++");
  88                 if (_assemblyRef.IsAlive)
  89                 {
  90                     (_assemblyRef.Target as NUIGadgetAssemblyLoadContext).Unload();
  91                 }
  92
  93                 _assembly = null;
  94                 Log.Warn("Unload(): " + _assemblyPath + " --");
  95             }
  96         }
  97     }
  98 }