1 files changed, 70 insertions, 0 deletions
diff --git a/lib/Plugins.Runtime/src/AssemblyWatcher.cs b/lib/Plugins.Runtime/src/AssemblyWatcher.cs
new file mode 100644
index 0000000..1cf87b0
--- /dev/null
+++ b/lib/Plugins.Runtime/src/AssemblyWatcher.cs
@@ -0,0 +1,70 @@
+/*
+* Copyright (c) 2023 Vaughn Nugent
+* 
+* Library: VNLib
+* Package: VNLib.Plugins.Runtime
+* File: AssemblyWatcher.cs 
+*
+* AssemblyWatcher.cs is part of VNLib.Plugins.Runtime which is part 
+* of the larger VNLib collection of libraries and utilities.
+*
+* VNLib.Plugins.Runtime is free software: you can redistribute it and/or modify 
+* it under the terms of the GNU General Public License as published
+* by the Free Software Foundation, either version 2 of the License,
+* or (at your option) any later version.
+*
+* VNLib.Plugins.Runtime is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 
+* General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License 
+* along with VNLib.Plugins.Runtime. If not, see http://www.gnu.org/licenses/.
+*/
+
+using System.Collections.Generic;
+
+namespace VNLib.Plugins.Runtime
+{
+    internal sealed class AssemblyWatcher : IPluginAssemblyWatcher
+    {
+        private readonly object _lock = new ();
+        private readonly Dictionary<IPluginReloadEventHandler, AsmFileWatcher> _watchers;
+
+        public AssemblyWatcher()
+        {
+            _watchers = new();
+        }
+
+        public void StopWatching(IPluginReloadEventHandler handler)
+        {
+            lock (_lock)
+            {
+                //Find old watcher by its handler, then dispose it
+                if (_watchers.Remove(handler, out AsmFileWatcher? watcher))
+                {
+                    //dispose the watcher
+                    watcher.Dispose();
+                }
+            }
+        }
+
+        public void WatchAssembly(IPluginReloadEventHandler handler, IPluginAssemblyLoader loader)
+        {
+            lock(_lock)
+            {
+                if(_watchers.Remove(handler, out AsmFileWatcher? watcher))
+                {
+                    //dispose the watcher
+                    watcher.Dispose();
+                }
+
+                //Queue up a new watcher
+                watcher = new(loader, handler);
+
+                //Store watcher
+                _watchers.Add(handler, watcher);
+            }
+        }       
+    }
+}