// Copyright (c) 2026 AlphaSierraPapa for the SharpDevelop Team
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this
// software and associated documentation files (the "Software"), to deal in the Software
// without restriction, including without limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
// to whom the Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or
// substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.

using System;
using System.Threading;

namespace ICSharpCode.ILSpyX.Settings
{
	/// <summary>
	/// Guards a config-file read-modify-write with a named <see cref="Mutex"/> so that two ILSpy
	/// instances editing the same sidecar (the settings XML, the bookmark list, ...) fold their
	/// changes in turn instead of overwriting each other. Acquire it around the
	/// read-update-write block and dispose it to release.
	/// </summary>
	public sealed class MutexProtector : IDisposable
	{
		readonly Mutex mutex;

		public MutexProtector(string name)
		{
			this.mutex = new Mutex(true, name, out bool createdNew);
			if (createdNew)
				return;

			try
			{
				mutex.WaitOne();
			}
			catch (AbandonedMutexException)
			{
			}
		}

		public void Dispose()
		{
			mutex.ReleaseMutex();
			mutex.Dispose();
		}
	}
}