///<summary>Registers callbacks to each soul, ensuring everything is cleaned up properly upon completion.</summary>
public static RegistrationRemover InterdependentRegister(this ISoul soul1, Func<bool> tryComplete1, ISoul soul2, Func<bool> tryComplete2) {
if (soul1 == null) throw new ArgumentNullException("soul1");
if (tryComplete1 == null) throw new ArgumentNullException("tryComplete1");
if (soul2 == null) throw new ArgumentNullException("soul2");
if (tryComplete2 == null) throw new ArgumentNullException("tryComplete2");
// forward declare the second registration canceller, so it can be referenced by the first registration
RegistrationRemover cancelRegistration2 = null;
var callCount = 0;
Action skipOnceCancelRegistration2 = () => {
if (Interlocked.Increment(ref callCount) == 2 && cancelRegistration2 != null)
cancelRegistration2();
};
// register the callbacks, linking their cancellation to each other
var cancelRegistration1 = soul1.Register(() => { if (tryComplete1()) skipOnceCancelRegistration2(); });
cancelRegistration2 = soul2.Register(() => { if (tryComplete2()) cancelRegistration1(); });
// now that cancelRegistration2 has been initialized, we can allow it to be run
skipOnceCancelRegistration2();
// outside can force cleanup
return () => {
cancelRegistration1();
cancelRegistration2();
};
}
///<summary>Registers callbacks to each soul, ensuring everything is cleaned up properly upon completion.</summary>
public static RegistrationRemover InterdependentRegister(this ISoul soul1, Func <bool> tryComplete1, ISoul soul2, Func <bool> tryComplete2)
{
if (soul1 == null)
{
throw new ArgumentNullException("soul1");
}
if (tryComplete1 == null)
{
throw new ArgumentNullException("tryComplete1");
}
if (soul2 == null)
{
throw new ArgumentNullException("soul2");
}
if (tryComplete2 == null)
{
throw new ArgumentNullException("tryComplete2");
}
// forward declare the second registration canceller, so it can be referenced by the first registration
RegistrationRemover cancelRegistration2 = null;
var callCount = 0;
Action skipOnceCancelRegistration2 = () => {
if (Interlocked.Increment(ref callCount) == 2 && cancelRegistration2 != null)
{
cancelRegistration2();
}
};
// register the callbacks, linking their cancellation to each other
var cancelRegistration1 = soul1.Register(() => { if (tryComplete1())
{
skipOnceCancelRegistration2();
}
});
cancelRegistration2 = soul2.Register(() => { if (tryComplete2())
{
cancelRegistration1();
}
});
// now that cancelRegistration2 has been initialized, we can allow it to be run
skipOnceCancelRegistration2();
// outside can force cleanup
return(() => {
cancelRegistration1();
cancelRegistration2();
});
}
///<summary>Registers a callback to the dependent soul that only occurs if the necessary soul doesn't die first, ensuring everything is cleaned up properly.</summary>
public static RegistrationRemover DependentRegister(this ISoul soul, Action action, ISoul necessarySoul)
{
if (soul == null)
{
throw new ArgumentNullException("soul");
}
if (action == null)
{
throw new ArgumentNullException("action");
}
if (necessarySoul == null)
{
throw new ArgumentNullException("necessarySoul");
}
// when the necessary soul is the same soul as the dependent soul, assume the callback invocation will beat the registration removal
if (ReferenceEquals(soul, necessarySoul))
{
necessarySoul = ImmortalSoul.Instance;
}
// avoid wrapping when possible
if (necessarySoul.Phase == Phase.Dead)
{
return(EmptyRemover);
}
if (soul.Phase != Phase.Mortal)
{
action();
return(EmptyRemover);
}
if (necessarySoul.Phase == Phase.Immortal)
{
return(soul.Register(action));
}
return(soul.InterdependentRegister(
() => {
action();
return true;
},
necessarySoul,
() => necessarySoul.Phase == Phase.Dead));
}
public RegistrationRemover Register(Action action)
{
return(_subSoul.Register(action));
}
public RegistrationRemover Register(Action action) => _subSoul.Register(action);
