public static void RefCountDisposable_SuppliesAsManyDependentDisposablesAsYouNeed_ButOnlyGetsDisposedAfterAllDependentsAreDisposedOf()
{
//Can be used as part of a synchonization mechanism
var refCountDisposable = new RefCountDisposable(
Disposable.Create(() =>
Debug.WriteLine("Underlying disposable has been disposed.")));
var firstDependentDisposable = refCountDisposable.GetDisposable();
var secondDependentDisposable = refCountDisposable.GetDisposable();
var thirdDependentDisposable = refCountDisposable.GetDisposable();
Console.WriteLine("Disposing of the second dependent.");
secondDependentDisposable.Dispose();
Console.WriteLine("Trying to dispose of the RefCountDisposable");
refCountDisposable.Dispose();
Console.WriteLine($"Evidently it fails! RefCountDisposable is disposed: {refCountDisposable.IsDisposed}");
Console.WriteLine("Disposing of the third dependent.");
thirdDependentDisposable.Dispose();
Console.WriteLine("Disposing of the first dependent.");
firstDependentDisposable.Dispose();
Console.WriteLine($"Now that the last dependent is disposed, RefCountDisposable is disposed: {refCountDisposable.IsDisposed}");
}
public void RefCountDisposable_RefCounting()
{
var d = new BooleanDisposable();
var r = new RefCountDisposable(d);
Assert.False(d.IsDisposed);
var d1 = r.GetDisposable();
var d2 = r.GetDisposable();
Assert.False(d.IsDisposed);
d1.Dispose();
Assert.False(d.IsDisposed);
d2.Dispose();
Assert.False(d.IsDisposed); // CHECK
r.Dispose();
Assert.True(d.IsDisposed);
Assert.True(r.IsDisposed);
var d3 = r.GetDisposable(); // CHECK
d3.Dispose();
}
/// <summary>
/// RefCountDisposable 可以使用 GetDisposable 来生成新的 Disposable，并且只会在生成的 Disposable 全部调用完 Dispose 之后，才会执行自己的 Dispose
/// </summary>
public static void RefCountDisposable()
{
var refCount = new RefCountDisposable(Disposable.Create(() => Console.WriteLine("Disposing refCount")));
var d1 = refCount.GetDisposable();
var d2 = refCount.GetDisposable();
refCount.Dispose();
Console.WriteLine("Disposing 1st");
d1.Dispose();
Console.WriteLine("Disposing 2nd");
d2.Dispose();
}
public async void AsyncDisposeTest()
{
pipe = new EventPipe();
var endThing = new TaskCompletionSource <bool>();
var disposer = new RefCountDisposable(Disposable.Create(() => endThing.SetResult(true)));
for (var i = 0; i < 100; i++)
{
pipe.ObserveFirst.Subscribe(new TestObserver(i, outp, "first", disposer.GetDisposable()));
pipe.ObserveConcurrent.Subscribe(new TestObserver(i, outp, "reader", disposer.GetDisposable()));
pipe.ObserveSynchronous.Subscribe(new TestObserver(i, outp, "writer", disposer.GetDisposable()));
}
disposer.Dispose();
//var testTask = new List<Task>();
var totalDisposer = new RefCountDisposable(Disposable.Create(() => pipe.Complete()));
var rand = new Random();
Parallel.ForEach(Enumerable.Range(0, 99), async x =>
{
using (totalDisposer.GetDisposable())
{
using (var scp = testProv.CreateScope())
{
var e = new MessageEvent
{
IgnoreThis = false,
Services = scp.ServiceProvider.CreateScope().ServiceProvider,
Scenario = VersaCommsID.FromEnum(EVersaCommIDType.Scenario, 0),
Player = new UnionType <VersaCommsID, IPlayer>(0),
Terminal = new UnionType <VersaCommsID, IVersaWriter>(0),
FullMessage = x.ToString(),
Entity = new UnionType <VersaCommsID, IEntity>(0),
};
await Task.Yield();
await pipe.ProcessEvent(e);
}
}
});
//totalDisposer.Dispose();
//scp.Dispose();
//await Task.WhenAll(testTask);
await Task.Delay(200);
totalDisposer.Dispose();
//await Task.Delay(200);
await endThing.Task;
//pipe.Dispose();
}
/// <summary>
/// Runs or observes a single catchup batch asynchronously for multiple catchup instances.
/// </summary>
public static IObservable <ReadModelCatchupStatus> SingleBatchAsync(
params ReadModelCatchup <ReadModelDbContext>[] catchups)
{
return(Observable.Create <ReadModelCatchupStatus>(observer =>
{
if (!catchups?.Any() ?? true)
{
observer.OnCompleted();
return Disposable.Empty;
}
var completions = new RefCountDisposable(Disposable.Create(observer.OnCompleted));
var subscriptions = new CompositeDisposable();
catchups.ForEach(catchup =>
{
var completion = completions.GetDisposable();
var sub = catchup.SingleBatchAsync()
.Subscribe(onNext: observer.OnNext,
onCompleted: completion.Dispose);
subscriptions.Add(sub);
});
completions.Dispose();
return subscriptions;
}));
}
public IDisposable Subscribe(ICompletableObserver observer)
{
var velocity = GetVelocity(_property).ToReactiveProperty();
var outerDisposable = new SingleAssignmentDisposable();
var currentTween = new SerialDisposable();
var observerCompletion = new RefCountDisposable(Disposable.Create(observer.OnCompleted));
outerDisposable.Disposable = new CompositeDisposable
(
_target.Subscribe(x =>
{
// Prevent observer from completing while there is a tween in progress
var tweenCompletion = observerCompletion.GetDisposable();
// Dispose any previous tween in progress, if any
currentTween.Disposable = new CompositeDisposable
(
Tween(_property, x, _duration, velocity.Value, _easer)
.SubscribeAndForget(tweenCompletion.Dispose),
tweenCompletion
);
},
() => observerCompletion.Dispose()),
currentTween
);
return(outerDisposable);
}
public void RefCountDisposable_AsFactory_Test()
{
// arrange
const int COUNT = 10;
var innerDisposable = new BooleanDisposable();
var dispFactory = new RefCountDisposable(innerDisposable);
// act
var dispodables = from i in Enumerable.Range(0, COUNT)
// will produce a related disposable
select dispFactory.GetDisposable();
dispodables = dispodables.ToArray();
dispFactory.Dispose(); // Start with single reference
// verify
foreach (IDisposable d in dispodables)
{
Assert.IsFalse(innerDisposable.IsDisposed);
Assert.IsFalse(dispFactory.IsDisposed);
d.Dispose();
}
Assert.IsTrue(dispFactory.IsDisposed);
Assert.IsTrue(innerDisposable.IsDisposed);
}
public static ISequence <ISequence <T> > Window <T>(this ISequence <T> source, int windowSize, int queueLimit = 1)
{
if (queueLimit < 1)
{
throw new ArgumentOutOfRangeException("queueLimit must be greater that one.");
}
return(Create <ISequence <T> >(context =>
{
Task <bool> lastCopyToResult = null;
var i = source.Start(context);
var subscription = new RefCountDisposable(i);
return Iterator.Create <ISequence <T> >(async(r, c) =>
{
if (lastCopyToResult != null && await lastCopyToResult.ConfigureAwait(false) == false)
{
return false;
}
if (!await i.MoveNext(c).ConfigureAwait(false))
{
return false;
}
var queue = new AsyncQueue <T>(queueLimit);
await queue.OnNext(i.Current, c).ConfigureAwait(false);
r.Value = Create(context2 => new AnonymousIterator <T>(queue.MoveNext, () => queue.Current, queue.Dispose, Enumerable.Empty <Task>, context2));
var keepAlive = subscription.GetDisposable();
lastCopyToResult = CopyToQueue(i, queue, windowSize - 1, CancellationToken.None, true).Finally(keepAlive.Dispose);
return true;
}, context, subscription);
}));
}
public IDisposable Subscribe(IObserver <TElement> observer)
{
var release = refCount.GetDisposable();
var subscription = subject.Subscribe(observer);
return(StableCompositeDisposable.Create(release, subscription));
}
public IDisposable Subscribe(UniRx.IObserver <TElement> observer)
{
IDisposable disposable = refCount.GetDisposable();
IDisposable disposable2 = subject.Subscribe(observer);
return(StableCompositeDisposable.Create(disposable, disposable2));
}
static IObservable <T> AddRef <T>(IObservable <T> xs, RefCountDisposable r)
{
return(Observable.Create <T>((IObserver <T> observer) => new CompositeDisposable(new IDisposable[]
{
r.GetDisposable(),
xs.Subscribe(observer)
})));
}
public void GetDisposableDisposeFirst()
{
int i = 0;
var src = Disposable.Create(() => i++);
var d = new RefCountDisposable(src);
var des = d.GetDisposable();
Assert.AreNotSame(src, des, "#1");
d.Dispose(); // triggers final disposable, up to refcount.
Assert.AreEqual(0, i, "#2");
des.Dispose();
Assert.AreEqual(1, i, "#3");
Assert.IsTrue(d.IsDisposed);
des = d.GetDisposable();
des.Dispose();
Assert.AreEqual(1, i, "#4");
}
private static void RefCountDisposable()
{
Demo.DisplayHeader("The RefCountDisposable - dispose the underlying disposable when all referencing disposables are dispsosed");
var inner = Disposable.Create(() => Console.WriteLine("Disposing inner-disposable"));
var refCountDisposable = new RefCountDisposable(inner);
var d1 = refCountDisposable.GetDisposable();
var d2 = refCountDisposable.GetDisposable();
var d3 = refCountDisposable.GetDisposable();
refCountDisposable.Dispose();
Console.WriteLine("Disposing 1st");
d1.Dispose();
Console.WriteLine("Disposing 2nd");
d2.Dispose();
Console.WriteLine("Disposing 3rd");
d3.Dispose();
}
public void Open()
{
if (String.IsNullOrEmpty(connectionName))
{
return;
}
lock (sync) {
//если две нитки используют один RasHelper и одна уже получила ссылку
if (connectionRef != Disposable.Empty)
{
return;
}
//если соединение есть и его открыли мы тогда берем ссылку
if (connection != null && !connection.IsDisposed)
{
connectionRef = connection.GetDisposable();
return;
}
//если соединение открыли не мы, тогда выходим
if (RasConnection.GetActiveConnections().Any(c => c.EntryName == connectionName))
{
return;
}
string phonebookPath = null;
foreach (var path in GetPhoneBooks())
{
using (var book = new RasPhoneBook()) {
book.Open(path);
if (book.Entries.Any(e => e.Name.Match(connectionName)))
{
phonebookPath = book.Path;
}
}
}
if (phonebookPath == null)
{
log.Warn($"Не удалось найти соединение {connectionName}, удаленное соединение устанавливаться не будет");
return;
}
using (var dialer = new RasDialer()) {
dialer.PhoneBookPath = phonebookPath;
dialer.EntryName = connectionName;
var handle = dialer.Dial();
var rasConnection = RasConnection.GetActiveConnections().FirstOrDefault(c => c.Handle == handle);
connection = new RefCountDisposable(Disposable.Create(() => rasConnection?.HangUp()));
connectionRef = connection.GetDisposable();
connection.Dispose();
}
}
}
public void GetDisposableDisposeLater()
{
int i = 0;
var src = Disposable.Create(() => i++);
var d = new RefCountDisposable(src);
var des = d.GetDisposable();
Assert.AreNotSame(src, des, "#1");
Assert.AreEqual(0, i, "#2");
des.Dispose();
Assert.AreEqual(0, i, "#3");
Assert.IsFalse(d.IsDisposed);
des = d.GetDisposable();
des.Dispose();
Assert.AreEqual(0, i, "#4");
d.Dispose(); // finally, it calls src dispose
Assert.AreEqual(1, i, "#5");
}
public void RefCountDisposable_Throw_If_Disposed()
{
var d = new BooleanDisposable();
var r = new RefCountDisposable(d, true);
r.Dispose();
Assert.True(d.IsDisposed);
ReactiveAssert.Throws <ObjectDisposedException>(() => { r.GetDisposable(); });
}
public void RefCountDisposable_PrimaryDisposesFirst()
{
var d = new BooleanDisposable();
var r = new RefCountDisposable(d);
Assert.False(d.IsDisposed);
var d1 = r.GetDisposable();
var d2 = r.GetDisposable();
Assert.False(d.IsDisposed);
d1.Dispose();
Assert.False(d.IsDisposed);
r.Dispose();
Assert.False(d.IsDisposed);
d2.Dispose();
Assert.True(d.IsDisposed);
}
public static IDisposable Subscribe(Func <ObservableConsole, IDisposable> subscribe)
{
lock (_systemConsoleSwapLock)
{
if (_refCount is null || _refCount.IsDisposed)
{
var console = new ConsoleOutput
{
_originalOutputWriter = Console.Out,
_originalErrorWriter = Console.Error
};
_out = new MultiplexingTextWriter();
_error = new MultiplexingTextWriter();
Console.SetOut(_out);
Console.SetError(_error);
_refCount = new RefCountDisposable(Disposable.Create(() =>
{
_out = null;
_error = null;
_refCount = null;
console.RestoreSystemConsole();
}));
}
var writerForCurrentContext = EnsureInitializedForCurrentAsyncContext();
var observableConsole = new ObservableConsole(
@out: _out.GetObservable(),
error: _error.GetObservable());
return(new CompositeDisposable
{
_refCount,
_refCount.GetDisposable(),
subscribe(observableConsole),
writerForCurrentContext
});
IDisposable EnsureInitializedForCurrentAsyncContext() =>
new CompositeDisposable
{
_out.EnsureInitializedForCurrentAsyncContext(),
_error.EnsureInitializedForCurrentAsyncContext()
};
}
}
protected override IDisposable SubscribeCore(IObserver <TElement> observer)
{
if (_refCount != null)
{
//
// [OK] Use of unsafe Subscribe: called on a known subject implementation.
//
var release = _refCount.GetDisposable();
var subscription = _subject.Subscribe/*Unsafe*/ (observer);
return(StableCompositeDisposable.Create(release, subscription));
}
//
// [OK] Use of unsafe Subscribe: called on a known subject implementation.
//
return(_subject.Subscribe/*Unsafe*/ (observer));
}
public async ValueTask <LockHolder> GetLockAsync(CancellationToken cancellationToken)
{
var refCount = refCountDisposable.GetDisposable();
if (refCountDisposable.IsDisposed)
{
return(new LockHolder(false, refCount, null));
}
else
{
try
{
await semaphoreSlim.WaitAsync(cancellationToken).ConfigureAwait(false);
}
catch
{
refCount.Dispose();
throw;
}
return(new LockHolder(true, refCount, semaphoreSlim));
}
}
public GroupedObservable(TKey key, IObservable <TElement> underlyingObservable, RefCountDisposable mergedDisposable)
{
this.Key = key;
this.underlyingObservable = new AnonymousObservable <TElement>(observer =>
new CompositeDisposable(mergedDisposable.GetDisposable(), underlyingObservable.Subscribe(observer)));
}
public RepositoryWrapper(string path)
{
_repository = new LibGit2Sharp.Repository(path);
_refCountDisposable = new RefCountDisposable(_repository);
_disposable = _refCountDisposable.GetDisposable();
}
public IDisposable AddRef() => _refCountDisposable.GetDisposable();
private static void Impl(bool primaryFirst, bool primaryRandom, IEnumerable <int> nDependents)
{
var rand = new Random();
foreach (var n in nDependents)
{
var e = new ManualResetEvent(false);
var hasDependent = new ManualResetEvent(false);
var r = new RefCountDisposable(Disposable.Create(() => { e.Set(); }));
var d = default(IDisposable);
if (primaryFirst)
{
d = r.GetDisposable();
r.Dispose();
}
else if (primaryRandom)
{
var sleep = rand.Next(0, 10) == 0 /* 10% chance */ ? rand.Next(2, 100) : 0;
ThreadPool.QueueUserWorkItem(_ =>
{
hasDependent.WaitOne();
Helpers.SleepOrSpin(sleep);
r.Dispose();
});
if (n == 0)
{
hasDependent.Set();
}
}
Console.Write(n + " - ");
var cd = new CountdownEvent(n * 2);
for (int i = 0; i < n; i++)
{
var j = i;
var sleep1 = rand.Next(0, 10) == 0 /* 10% chance */ ? rand.Next(2, 100) : 0;
var sleep2 = rand.Next(0, 10) == 0 /* 10% chance */ ? rand.Next(2, 100) : 0;
var sleep3 = rand.Next(0, 10) == 0 /* 10% chance */ ? rand.Next(2, 100) : 0;
ThreadPool.QueueUserWorkItem(_ =>
{
Helpers.SleepOrSpin(sleep1);
Console.Write("+");
var f = r.GetDisposable();
if (j == 0)
{
hasDependent.Set();
}
Helpers.SleepOrSpin(sleep2);
ThreadPool.QueueUserWorkItem(__ =>
{
Helpers.SleepOrSpin(sleep3);
f.Dispose();
Console.Write("-");
cd.Signal();
});
cd.Signal();
});
}
cd.Wait();
if (primaryFirst)
{
d.Dispose();
}
else if (!primaryRandom)
{
r.Dispose();
}
e.WaitOne();
Console.WriteLine(".");
}
}
