public void Equality() {
var source = new LifetimeSource();
var p = new Perishable<int>(2, source.Lifetime);
p.AssertEquals(new Perishable<int>(2, source.Lifetime));
p.Equals(new Perishable<int>(3, source.Lifetime)).AssertIsFalse();
p.Equals(new Perishable<int>(2, Lifetime.Immortal)).AssertIsFalse();
}
public void CurrentAndFutureItems() {
var source = new LifetimeSource();
var p1 = new Perishable<int>(1, source.Lifetime);
var p2 = new Perishable<int>(1, Lifetime.Immortal);
var p = new PerishableCollection<int>();
var li0 = new List<Perishable<int>>();
p.CurrentAndFutureItems().Subscribe(e => {
li0.Add(e);
e.Lifetime.WhenDead(() => li0.Remove(e));
});
li0.AssertSequenceEquals();
p.Add(p1);
li0.AssertSequenceEquals(p1);
var li1 = new List<Perishable<int>>();
p.CurrentAndFutureItems().Subscribe(e => {
li1.Add(e);
e.Lifetime.WhenDead(() => li1.Remove(e));
});
li1.AssertSequenceEquals(p1);
p.Add(p2.Value, p2.Lifetime);
li0.AssertSequenceEquals(p1, p2);
li1.AssertSequenceEquals(p1, p2);
source.EndLifetime();
li0.AssertSequenceEquals(p2);
li1.AssertSequenceEquals(p2);
}
/// <summary>
/// Returns a new lifetime source that automatically kills its exposed lifetime if the given lifetime dies.
/// Note: If the given lifetimes has died or will die then using ImmortalizeLifetime on the result will eventually cause an InvalidOperationException.
/// </summary>
public static LifetimeSource CreateDependentSource(this Lifetime lifetime)
{
var dependentResult = new LifetimeSource();
lifetime.WhenDead(dependentResult.EndLifetime, dependentResult.Lifetime);
return(dependentResult);
}
public void IsResultThreadSafe() {
foreach (var repeat in Enumerable.Range(0, 5)) {
var n = 5000;
var nt = 4;
var p = new PerishableCollection<int>();
var queues = Enumerable.Range(0, 4).Select(e => new Queue<LifetimeSource>()).ToArray();
TestUtil.ConcurrencyTest(
threadCount: nt,
callbackCount: n,
repeatedWork: (t, i) => {
var r = new LifetimeSource();
p.Add(i, r.Lifetime);
if (i % 2 == 0) queues[t].Enqueue(r);
if (queues[t].Count > 20)
queues[t].Dequeue().EndLifetime();
},
finalWork: t => {
while (queues[t].Count > 0)
queues[t].Dequeue().EndLifetime();
});
var expected = Enumerable.Range(0, n).Where(e => e%2 != 0).SelectMany(e => Enumerable.Repeat(e, nt));
p.CurrentItems().OrderBy(e => e.Value).Select(e => e.Value).AssertSequenceEquals(expected);
}
}
public void AsCancellationToken() {
((CancellationToken)Lifetime.Immortal).CanBeCanceled.AssertIsFalse();
((CancellationToken)Lifetime.Dead).IsCancellationRequested.AssertIsTrue();
// cancelled on death
var doomed = new LifetimeSource();
CancellationToken dt = doomed.Lifetime;
dt.CanBeCanceled.AssertIsTrue();
dt.IsCancellationRequested.AssertIsFalse();
doomed.EndLifetime();
dt.IsCancellationRequested.AssertIsTrue();
// already cancelled when already dead
((CancellationToken)doomed.Lifetime).IsCancellationRequested.AssertIsTrue();
// hangs on immortal
var blessed = new LifetimeSource();
CancellationToken bt = blessed.Lifetime;
bt.CanBeCanceled.AssertIsTrue();
bt.IsCancellationRequested.AssertIsFalse();
blessed.ImmortalizeLifetime();
bt.IsCancellationRequested.AssertIsFalse();
// knows can't be cancelled when already immortal
((CancellationToken)blessed.Lifetime).CanBeCanceled.AssertIsFalse();
// hangs on limbo
InvalidCallbackMaker.AssertNotCollectedAfter(action => {
var r = new LifetimeSource();
CancellationToken ct = r.Lifetime;
ct.Register(action);
return ct;
});
}
///<summary>Returns a newly created mortal lifetime after giving eternal life to the previously created lifetime (if any).</summary>
public Lifetime StartNextAndImmortalizePreviousLifetime()
{
var next = new LifetimeSource();
var prev = Interlocked.Exchange(ref _active, next);
prev?.ImmortalizeLifetime();
return(next.Lifetime);
}
public void Max() {
Lifetime.Dead.Max(Lifetime.Dead).IsDead.AssertIsTrue();
Lifetime.Dead.Max(Lifetime.Immortal).IsImmortal.AssertIsTrue();
Lifetime.Immortal.Max(Lifetime.Dead).IsImmortal.AssertIsTrue();
Lifetime.Immortal.Max(Lifetime.Immortal).IsImmortal.AssertIsTrue();
var s1 = new LifetimeSource();
var s2 = new LifetimeSource();
var s3 = new LifetimeSource();
var m1 = s1.Lifetime.Max(s2.Lifetime);
var m2 = s1.Lifetime.Max(s3.Lifetime);
var m3 = s2.Lifetime.Max(s3.Lifetime);
var t1 = m1.WhenDeadTask();
var t2 = m2.WhenDeadTask();
var t3 = m3.WhenDeadTask();
// equality optimization
s1.Lifetime.Max(s1.Lifetime).AssertEquals(s1.Lifetime);
m1.Max(m1).AssertEquals(m1);
// dead optimization
s1.Lifetime.Max(Lifetime.Dead).AssertEquals(s1.Lifetime);
Lifetime.Dead.Max(m1).AssertEquals(m1);
// when one becomes immortal, max becomes immortal
(m1.IsImmortal || m1.IsDead).AssertIsFalse();
(m2.IsImmortal || m2.IsDead).AssertIsFalse();
s1.ImmortalizeLifetime();
m1.IsImmortal.AssertIsTrue();
m2.IsImmortal.AssertIsTrue();
// when one becomes dead, max is unaffected
s2.EndLifetime();
// when both become dead, max is dead
(m3.IsImmortal || m3.IsDead).AssertIsFalse();
t3.AssertNotCompleted();
s3.EndLifetime();
m3.IsDead.AssertIsTrue();
t3.AssertRanToCompletion();
Task.WhenAny(t1, t2).AssertNotCompleted();
// limbo allows collection
InvalidCallbackMaker.AssertCollectedAfter(a => {
var r1 = new LifetimeSource();
var r2 = new LifetimeSource();
var r3 = new LifetimeSource();
var life1 = r1.Lifetime.Max(r2.Lifetime);
var life2 = r1.Lifetime.Max(r3.Lifetime);
var life3 = r2.Lifetime.Max(r3.Lifetime);
life1.WhenDead(a);
life2.WhenDead(a);
life3.WhenDead(a);
r1.EndLifetime(); // one dead has no effect on max going to limbo
return Tuple.Create(life1, life2, life3);
});
}
///<summary>Returns a newly created mortal lifetime after killing the previously created lifetime (if any).</summary>
public Lifetime StartNextAndEndPreviousLifetime()
{
var next = new LifetimeSource();
var prev = Interlocked.Exchange(ref _active, next);
if (prev != null)
{
prev.EndLifetime();
}
return(next.Lifetime);
}
///<summary>A lifetime that ends after the given duration has elapsed, in game time.</summary>
public static Lifetime Delay(this Animation animation, TimeSpan duration)
{
var remaining = duration;
var life = new LifetimeSource();
animation.StepActions.Add(
step => {
remaining -= step.TimeStep;
if (remaining < TimeSpan.Zero) life.EndLifetime();
},
life.Lifetime);
return life.Lifetime;
}
public void CurrentAndFutureItems_EndingDuringEnumerationDoesNotLockup() {
var s = new LifetimeSource();
var p = new PerishableCollection<int>();
for (var i = 0; i < 1000; i++) {
p.Add(i, Lifetime.Immortal);
}
var t = Task.Factory.StartNew(
() => p.CurrentAndFutureItems().Subscribe(
item => s.EndLifetime(),
s.Lifetime));
t.Wait(TimeSpan.FromMilliseconds(100));
t.AssertRanToCompletion();
}
public void CurrentItems() {
var source = new LifetimeSource();
var p1 = new Perishable<int>(1, source.Lifetime);
var p2 = new Perishable<int>(1, Lifetime.Immortal);
var p = new PerishableCollection<int>();
p.CurrentItems().AssertSequenceEquals();
p.Add(p1);
p.CurrentItems().AssertSequenceEquals(p1);
p.Add(p2.Value, p2.Lifetime);
p.CurrentItems().AssertSequenceEquals(p1, p2);
source.EndLifetime();
p.CurrentItems().AssertSequenceEquals(p2);
}
public void ObserveNonPerishedCount() {
var li1 = new List<int>();
new[] { new Perishable<int>(1, Lifetime.Immortal), new Perishable<int>(2, Lifetime.Immortal) }
.ToObservable()
.ObserveNonPerishedCount(completeWhenSourceCompletes: true)
.Subscribe(li1.Add, () => li1.Add(-1));
li1.AssertSequenceEquals(0, 1, 2, -1);
var source = new LifetimeSource();
var li2 = new List<int>();
new[] { new Perishable<int>(1, source.Lifetime), new Perishable<int>(2, source.Lifetime) }
.ToObservable()
.ObserveNonPerishedCount(completeWhenSourceCompletes: false)
.Subscribe(li2.Add, () => li2.Add(-1));
li2.AssertSequenceEquals(0, 1, 2);
source.EndLifetime();
li2.AssertSequenceEquals(0, 1, 2, 1, 0, -1);
}
public void IsEnumeratingWhileMutatingThreadSafe() {
foreach (var repeat in Enumerable.Range(0, 5)) {
var n = 5000;
var nt = 4;
var p = new PerishableCollection<int>();
var queues = Enumerable.Range(0, 4).Select(e => new Queue<LifetimeSource>()).ToArray();
TestUtil.ConcurrencyTest(
threadCount: nt,
callbackCount: n,
repeatedWork: (t, i) => {
if (t%2 == 0) {
if (i%500 != 0) return;
var r = p.CurrentItems().OrderBy(e => e.Value).ToList();
(r.Count(e => e.Value%2 == 0 && !e.Lifetime.IsDead) < nt/2 * 20).AssertIsTrue();
} else {
var r = new LifetimeSource();
p.Add(i, r.Lifetime);
if (i % 2 == 0) queues[t].Enqueue(r);
if (queues[t].Count > 20)
queues[t].Dequeue().EndLifetime();
}
},
finalWork: t => {
while (queues[t].Count > 0)
queues[t].Dequeue().EndLifetime();
});
}
}
public void Equality() {
// mortals are not congruent or equal
var s1 = new LifetimeSource();
var s2 = new LifetimeSource();
var a = new Func<Lifetime>[] {
() => Lifetime.Immortal,
() => Lifetime.Dead,
() => s1.Lifetime,
() => s2.Lifetime
};
for (var i = 0; i < a.Length; i++) {
for (var j = 0; j < a.Length; j++) {
a[i]().IsCongruentTo(a[j]()).AssertEquals(i == j);
a[i]().Equals(a[j]()).AssertEquals(i == j);
if (i == j) a[i]().GetHashCode().AssertEquals(a[j]().GetHashCode());
}
}
// but mortals become congruent when set to the same phase
s1.EndLifetime();
s2.EndLifetime();
s1.Lifetime.IsCongruentTo(s2.Lifetime).AssertIsTrue();
}
public void LifetimeImmortalityConcurrency() {
var repeats = 5;
foreach (var _ in Enumerable.Range(0, repeats)) {
var n = 0;
var source = new LifetimeSource();
TestUtil.ConcurrencyTest(
threadCount: 4,
callbackCount: 3000,
repeatedWork: (t, i) => source.Lifetime.WhenDead(() => Interlocked.Increment(ref n)),
finalWork: t => source.ImmortalizeLifetime());
n.AssertEquals(0);
}
}
public void Dispose() {
_source = null;
GC.Collect();
GC.WaitForPendingFinalizers();
}
public void LifetimeDeathReentrancy() {
var r = new LifetimeSource();
var r2 = new LifetimeSource();
r.Lifetime.WhenDead(r2.EndLifetime, r2.Lifetime);
r.Lifetime.WhenDead(r.EndLifetime);
r.EndLifetime();
}
public void LifetimeDeathConcurrency() {
var repeats = 5;
foreach (var _ in Enumerable.Range(0, repeats)) {
var n = 0;
var source = new LifetimeSource();
var threadCount = 4;
var callbackCount = 3000;
TestUtil.ConcurrencyTest(
threadCount,
callbackCount,
repeatedWork: (t, i) => source.Lifetime.WhenDead(() => Interlocked.Increment(ref n)),
finalWork: t => source.EndLifetime());
n.AssertEquals(callbackCount * threadCount);
}
}
public void WhenSet() {
// called when immortal?
var blessed = new LifetimeSource();
var preBlessedLife = blessed.Lifetime.WhenDeadTask();
blessed.ImmortalizeLifetime();
var bt = new[] {
Lifetime.Immortal.WhenDeadTask(),
blessed.Lifetime.WhenDeadTask(),
preBlessedLife
};
Task.WhenAny(bt).AssertNotCompleted();
// called when dead?
var doomed = new LifetimeSource();
var preDoomedLife = doomed.Lifetime.WhenDeadTask();
doomed.EndLifetime();
var dt = new[] {
preDoomedLife,
doomed.Lifetime.WhenDeadTask(),
Lifetime.Dead.WhenDeadTask()
};
Task.WhenAll(dt).AssertRanToCompletion();
// never called from limbo
var limboed = new LimboLife();
var preLimboLife = limboed.Lifetime.WhenDeadTask();
limboed.Dispose();
Task.WhenAny(
preLimboLife,
limboed.Lifetime.WhenDeadTask()
).AssertNotCompleted();
}
public void AllowsForGarbageCollection() {
var mortal = new LifetimeSource();
var lifes = new[] {
Lifetime.Immortal,
Lifetime.Dead,
mortal.Lifetime
};
// callbacks are not kept when the lifetime is not mortal
var f = ValidCallbackMaker;
foreach (var life in lifes) {
// pre-finished
f.AssertCollectedAfter(e => Lifetime.Immortal.WhenDead(e, life));
f.AssertCollectedAfter(e => Lifetime.Dead.WhenDead(e, life));
f.AssertCollectedAfter(e => LimboedLifetime.WhenDead(e, life));
// post-finished
f.AssertCollectedAfter(e => { using (var limbod = new LimboLife()) limbod.Lifetime.WhenDead(e, life); });
f.AssertCollectedAfter(e => { using (var blessed = new BlessedLife()) blessed.Lifetime.WhenDead(e, life); });
f.AssertCollectedAfter(e => { using (var doomed = new DoomedLife()) doomed.Lifetime.WhenDead(e, life); });
}
// callbacks are not kept when the subscription lifetime is dead or dies
f.AssertCollectedAfter(e => { using (var doomed = new DoomedLife()) mortal.Lifetime.WhenDead(e, doomed.Lifetime); });
f.AssertCollectedAfter(e => mortal.Lifetime.WhenDead(e, Lifetime.Dead));
// callbacks are kept when the lifetime is mortal and the subscription lifetime does not die
f.AssertNotCollectedAfter(e => mortal.Lifetime.WhenDead(e, Lifetime.Immortal));
f.AssertNotCollectedAfter(e => mortal.Lifetime.WhenDead(e, mortal.Lifetime));
GC.KeepAlive(mortal);
}
/// <summary>
/// Returns a new lifetime source that automatically kills its exposed lifetime if the given lifetime dies.
/// Note: If the given lifetimes has died or will die then using ImmortalizeLifetime on the result will eventually cause an InvalidOperationException.
/// </summary>
public static LifetimeSource CreateDependentSource(this Lifetime lifetime) {
var dependentResult = new LifetimeSource();
lifetime.WhenDead(dependentResult.EndLifetime, dependentResult.Lifetime);
return dependentResult;
}
public void Status() {
// status of constants
Lifetime.Immortal.IsMortal.AssertIsFalse();
Lifetime.Immortal.IsImmortal.AssertIsTrue();
Lifetime.Immortal.IsDead.AssertIsFalse();
Lifetime.Dead.IsMortal.AssertIsFalse();
Lifetime.Dead.IsImmortal.AssertIsFalse();
Lifetime.Dead.IsDead.AssertIsTrue();
// state before transition
var mortal = new LifetimeSource();
mortal.Lifetime.IsMortal.AssertIsTrue();
mortal.Lifetime.IsImmortal.AssertIsFalse();
mortal.Lifetime.IsDead.AssertIsFalse();
// transition to dead
var doomed = new LifetimeSource();
doomed.EndLifetime();
doomed.Lifetime.IsMortal.AssertIsFalse();
doomed.Lifetime.IsImmortal.AssertIsFalse();
doomed.Lifetime.IsDead.AssertIsTrue();
// transition to immortal
var blessed = new LifetimeSource();
blessed.ImmortalizeLifetime();
blessed.Lifetime.IsMortal.AssertIsFalse();
blessed.Lifetime.IsImmortal.AssertIsTrue();
blessed.Lifetime.IsDead.AssertIsFalse();
// transition to immortal via limbo
var limbo = new LimboLife();
limbo.Dispose();
GC.Collect();
limbo.Lifetime.IsMortal.AssertIsFalse();
limbo.Lifetime.IsImmortal.AssertIsTrue();
limbo.Lifetime.IsDead.AssertIsFalse();
}
///<summary>A lifetime then ends after the lifetime created by a function (triggered when the given lifetime ends) ends.</summary>
public static Lifetime ThenResurrect(this Lifetime lifetime, Func<Lifetime> resurrectedLifetimeFunc)
{
var r = new LifetimeSource();
lifetime.WhenDead(() => resurrectedLifetimeFunc().WhenDead(r.EndLifetime));
return r.Lifetime;
}
///<summary>Returns a newly created mortal lifetime after giving eternal life to the previously created lifetime (if any).</summary>
public Lifetime StartNextAndImmortalizePreviousLifetime() {
var next = new LifetimeSource();
var prev = Interlocked.Exchange(ref _active, next);
if (prev != null) prev.ImmortalizeLifetime();
return next.Lifetime;
}
public void CreateDependentSource_Death() {
var d1 = new LifetimeSource();
var d2 = d1.Lifetime.CreateDependentSource();
var d3 = d2.Lifetime.CreateDependentSource();
d2.Lifetime.IsMortal.AssertIsTrue();
d3.Lifetime.IsMortal.AssertIsTrue();
d2.EndLifetime();
d2.Lifetime.IsDead.AssertIsTrue();
d3.Lifetime.IsDead.AssertIsTrue();
d1.Lifetime.IsMortal.AssertIsTrue();
}
public void CreateDependentSource_Immortality() {
var i1 = new LifetimeSource();
var i2 = i1.Lifetime.CreateDependentSource();
var i3 = i2.Lifetime.CreateDependentSource();
i3.Lifetime.IsMortal.AssertIsTrue();
i2.ImmortalizeLifetime();
i2.Lifetime.IsImmortal.AssertIsTrue();
i3.Lifetime.IsMortal.AssertIsTrue();
i3.ImmortalizeLifetime();
i3.Lifetime.IsImmortal.AssertIsTrue();
i1.Lifetime.IsMortal.AssertIsTrue();
TestUtil.ExpectException<InvalidOperationException>(i1.EndLifetime);
i1.Lifetime.IsDead.AssertIsTrue();
}
public void CreateDependentSource_Garbage() {
// an independent source will keep dependents alive
var independent = new LifetimeSource();
new Func<LifetimeSource>(() => independent.Lifetime.CreateDependentSource())
.AssertNotCollectedAfter(e => e);
independent.Lifetime.IsMortal.AssertIsTrue();
// a dependent source does not keep its dependency alive
LifetimeSource dependent = null;
new Func<LifetimeSource>(() => new LifetimeSource())
.AssertCollectedAfter(e => dependent = e.Lifetime.CreateDependentSource());
dependent.Lifetime.IsMortal.AssertIsTrue();
}
public void ConstructionProperties() {
var source = new LifetimeSource();
var p = new Perishable<int>(2, source.Lifetime);
p.Value.AssertEquals(2);
p.Lifetime.AssertEquals(source.Lifetime);
}
private void SetupEnergyAndTime(Game game, double energyLossForCutting, double energyGainPerConnectorBroken) {
var elapsed = TimeSpan.Zero;
var living = new LifetimeSource();
living.Lifetime.WhenDead(() => {
if (Best == elapsed) {
LabelTitle.Text = "New High Score! Try Again?";
LabelTitle.Foreground = new SolidColorBrush(Colors.Green);
} else {
LabelTitle.Text = "Game Over! Try Again?";
LabelTitle.Foreground = new SolidColorBrush(Colors.Red);
}
MenuPanel.Visibility = Visibility.Visible;
}, game.Life);
// show energy status
var gains = 0.0;
var loses = 0.0;
var energy = 50.0;
var maxEnergy = 50.0;
game.LoopActions.Add(step => {
// energy decays faster and faster over time
var t = step.TimeStep.TotalSeconds;
energy -= t * Math.Log(elapsed.TotalSeconds / 15 + 1).Max(1);
// quickly decrease the size of the red/blue bars that show changes
gains -= t * 5;
loses -= t * 5;
gains *= Math.Pow(0.01, t);
loses *= Math.Pow(0.01, t);
// keep everything reasonable
gains = gains.Clamp(0, 10);
loses = loses.Clamp(0, 10);
energy = energy.Clamp(0, maxEnergy);
// "draw" energy
var w = canvas.ActualWidth;
BarEnergy.Fill = new SolidColorBrush(Colors.Yellow.LerpTo(Colors.Green, (energy * 2 / maxEnergy).Clamp(0, 1)));
BarLoses.Width = ((energy + loses) / maxEnergy * w).Clamp(0, w);
BarGains.Width = (energy / maxEnergy * w).Clamp(0, w);
BarEnergy.Width = ((energy - gains) / maxEnergy * w).Clamp(0, w);
// hit 0 energy? game over
if (energy == 0) living.EndLifetime();
}, game.Life);
// track energy changes due to connectors dying
game.Connectors.CurrentAndFutureItems().Subscribe(e => e.Lifetime.WhenDead(() => {
// breaking connectors gain you some energy
if (living.Lifetime.IsMortal)
energy += energyGainPerConnectorBroken;
gains += energyGainPerConnectorBroken;
// but making cuts costs energy
if (e.Value.CutPoint != null) {
energy -= energyLossForCutting;
loses += energyLossForCutting;
}
}), game.Life);
// track times
game.LoopActions.Add(step => {
// advance time
if (living.Lifetime.IsMortal)
elapsed += step.TimeStep;
Best = Best.Max(elapsed);
// show time
TimeLabel.Text = String.Format("Time: {0:0.0}s", elapsed.TotalSeconds);
// show best time (green when making best time)
TimeBest.Background = new SolidColorBrush(
Best == elapsed
? Color.FromArgb(128, 0, 255, 0)
: Colors.Transparent);
TimeBest.Text = String.Format("Best: {0:0.0}s", Best.TotalSeconds);
}, game.Life);
}