SpinLock extension without a ref

output.txt

With `ref` in `this ref SpinLock source`
Got lock
Ready
Doing work
Releasing lock
Got lock
Doing work
Releasing lock
Got lock
Doing work
Releasing lock

Without `ref` in `this SpinLock source`
Ready
Got lock
Got lock
Got lock
Doing work
Doing work
Doing work
Releasing lock
Releasing lock
Releasing lock

Program.cs

using ConsoleApp11;

var sl = new SpinLock();

for (int i = 0; i < 3; i++)
{
	_ = Task.Run(() => DoSomething(ref sl));
}
Console.WriteLine("Ready");
Console.ReadLine();



void DoSomething(ref SpinLock sl)
{
	sl.ExecuteLocked(_ =>
	{
		Console.WriteLine("Doing work");
		Thread.Sleep(1000);
	});
}

SpinLockExtensions.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp11;
public static class SpinLockExtensions
{
	public static void ExecuteLocked(
		this ref SpinLock source,
		Action<CancellationToken> task,
		CancellationToken cancellationToken = default)
	{
		ArgumentNullException.ThrowIfNull(source);
		ArgumentNullException.ThrowIfNull(task);

		bool hasLock = false;
		do
		{
			source.Enter(ref hasLock);
		}
		while (!hasLock && !cancellationToken.IsCancellationRequested);

		try
		{
			if (cancellationToken.IsCancellationRequested)
				return;

			Console.WriteLine("Got lock");
			task(cancellationToken);
		}
		finally
		{
			if (hasLock)
			{
				Console.WriteLine("Releasing lock");
				source.Exit();
			}
		}
	}
}