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/*
* 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);
}
}
}
}
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