dev/fixtures/SamplePulseSource.cs
A small game-owned event source that allows code to subscribe with an IDisposable and tracks current listener count. It stores listeners in a private event, increments/decrements a Listeners counter on subscribe/unsubscribe, and can Raise the event to invoke all listeners.
Self Modifying Code
namespace SuperuserCompatibilityLab.Engine.Modules;
/// <summary>A game-owned signal used to demonstrate subscription cleanup without static state.</summary>
public sealed class SamplePulseSource
{
private event Action Pulse;
/// <summary>Gets the number of currently attached listeners.</summary>
public int Listeners { get; private set; }
/// <summary>Registers one listener and returns its lifetime handle.</summary>
public IDisposable Subscribe( Action listener )
{
Pulse += listener;
Listeners++;
return new SamplePulseSubscription( () =>
{
Pulse -= listener;
Listeners--;
} );
}
/// <summary>Raises a game event once for every live listener.</summary>
public void Raise() => Pulse?.Invoke();
}