Investigate Realm close lifecycle

[nirinchev]

Looking at the code for State.RemoveRealm:

realm-dotnet/Realm/Realm/Realm.cs

Lines 1400 to 1415 in 247a6fc

	public bool RemoveRealm(Realm realm)
	{
	var weakRealm = _weakRealms.SingleOrDefault(r =>
	{
	return r.TryGetTarget(out var other) && ReferenceEquals(realm, other);
	});
	_weakRealms.Remove(weakRealm);
	if (!_weakRealms.Any())
	{
	realm.SharedRealmHandle.CloseRealm();
	return true;
	}
	return false;
	}

It looks like we may end up in a situation where we have 2 instances - X and Y; X gets GC-ed and Y - disposed. When RemoveRealm is called for Y, it'll see there're still instances in State._weakRealms and avoid closing the native Realm.

[sync-by-unito]

➤ Brian Munkholm commented:

This looks to be unblocked now.