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- // Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
- using System.Collections.Generic;
- using System.Reactive.Concurrency;
- using System.Reactive.Disposables;
- using System.Reactive.Subjects;
- namespace System.Reactive.Linq
- {
- #if !NO_PERF
- using ObservableImpl;
- #endif
- internal partial class QueryLanguage
- {
- #region + Buffer +
- #region TimeSpan only
- public virtual IObservable<IList<TSource>> Buffer<TSource>(IObservable<TSource> source, TimeSpan timeSpan)
- {
- return Buffer_<TSource>(source, timeSpan, timeSpan, SchedulerDefaults.TimeBasedOperations);
- }
- public virtual IObservable<IList<TSource>> Buffer<TSource>(IObservable<TSource> source, TimeSpan timeSpan, IScheduler scheduler)
- {
- return Buffer_<TSource>(source, timeSpan, timeSpan, scheduler);
- }
- public virtual IObservable<IList<TSource>> Buffer<TSource>(IObservable<TSource> source, TimeSpan timeSpan, TimeSpan timeShift)
- {
- return Buffer_<TSource>(source, timeSpan, timeShift, SchedulerDefaults.TimeBasedOperations);
- }
- public virtual IObservable<IList<TSource>> Buffer<TSource>(IObservable<TSource> source, TimeSpan timeSpan, TimeSpan timeShift, IScheduler scheduler)
- {
- return Buffer_<TSource>(source, timeSpan, timeShift, scheduler);
- }
- private static IObservable<IList<TSource>> Buffer_<TSource>(IObservable<TSource> source, TimeSpan timeSpan, TimeSpan timeShift, IScheduler scheduler)
- {
- #if !NO_PERF
- return new Buffer<TSource>(source, timeSpan, timeShift, scheduler);
- #else
- return source.Window(timeSpan, timeShift, scheduler).SelectMany(Observable.ToList);
- #endif
- }
- #endregion
- #region TimeSpan + int
- public virtual IObservable<IList<TSource>> Buffer<TSource>(IObservable<TSource> source, TimeSpan timeSpan, int count)
- {
- return Buffer_<TSource>(source, timeSpan, count, SchedulerDefaults.TimeBasedOperations);
- }
- public virtual IObservable<IList<TSource>> Buffer<TSource>(IObservable<TSource> source, TimeSpan timeSpan, int count, IScheduler scheduler)
- {
- return Buffer_<TSource>(source, timeSpan, count, scheduler);
- }
- private static IObservable<IList<TSource>> Buffer_<TSource>(IObservable<TSource> source, TimeSpan timeSpan, int count, IScheduler scheduler)
- {
- #if !NO_PERF
- return new Buffer<TSource>(source, timeSpan, count, scheduler);
- #else
- return source.Window(timeSpan, count, scheduler).SelectMany(Observable.ToList);
- #endif
- }
- #endregion
- #endregion
- #region + Delay +
- #region TimeSpan
- public virtual IObservable<TSource> Delay<TSource>(IObservable<TSource> source, TimeSpan dueTime)
- {
- return Delay_<TSource>(source, dueTime, SchedulerDefaults.TimeBasedOperations);
- }
- public virtual IObservable<TSource> Delay<TSource>(IObservable<TSource> source, TimeSpan dueTime, IScheduler scheduler)
- {
- return Delay_<TSource>(source, dueTime, scheduler);
- }
- private static IObservable<TSource> Delay_<TSource>(IObservable<TSource> source, TimeSpan dueTime, IScheduler scheduler)
- {
- #if !NO_PERF
- return new Delay<TSource>(source, dueTime, scheduler);
- #else
- return new AnonymousObservable<TSource>(observer =>
- {
- var gate = new object();
- var q = new Queue<Timestamped<Notification<TSource>>>();
- var active = false;
- var running = false;
- var cancelable = new SerialDisposable();
- var exception = default(Exception);
- var subscription = source.Materialize().Timestamp(scheduler).Subscribe(notification =>
- {
- var shouldRun = false;
- lock (gate)
- {
- if (notification.Value.Kind == NotificationKind.OnError)
- {
- q.Clear();
- q.Enqueue(notification);
- exception = notification.Value.Exception;
- shouldRun = !running;
- }
- else
- {
- q.Enqueue(new Timestamped<Notification<TSource>>(notification.Value, notification.Timestamp.Add(dueTime)));
- shouldRun = !active;
- active = true;
- }
- }
- if (shouldRun)
- {
- if (exception != null)
- observer.OnError(exception);
- else
- {
- var d = new SingleAssignmentDisposable();
- cancelable.Disposable = d;
- d.Disposable = scheduler.Schedule(dueTime, self =>
- {
- lock (gate)
- {
- if (exception != null)
- return;
- running = true;
- }
- Notification<TSource> result;
- do
- {
- result = null;
- lock (gate)
- {
- if (q.Count > 0 && q.Peek().Timestamp.CompareTo(scheduler.Now) <= 0)
- result = q.Dequeue().Value;
- }
- if (result != null)
- result.Accept(observer);
- } while (result != null);
- var shouldRecurse = false;
- var recurseDueTime = TimeSpan.Zero;
- var e = default(Exception);
- lock (gate)
- {
- if (q.Count > 0)
- {
- shouldRecurse = true;
- recurseDueTime = TimeSpan.FromTicks(Math.Max(0, q.Peek().Timestamp.Subtract(scheduler.Now).Ticks));
- }
- else
- active = false;
- e = exception;
- running = false;
- }
- if (e != null)
- observer.OnError(e);
- else if (shouldRecurse)
- self(recurseDueTime);
- });
- }
- }
- });
- return new CompositeDisposable(subscription, cancelable);
- });
- #endif
- }
- #endregion
- #region DateTimeOffset
- public virtual IObservable<TSource> Delay<TSource>(IObservable<TSource> source, DateTimeOffset dueTime)
- {
- return Delay_<TSource>(source, dueTime, SchedulerDefaults.TimeBasedOperations);
- }
- public virtual IObservable<TSource> Delay<TSource>(IObservable<TSource> source, DateTimeOffset dueTime, IScheduler scheduler)
- {
- return Delay_<TSource>(source, dueTime, scheduler);
- }
- private static IObservable<TSource> Delay_<TSource>(IObservable<TSource> source, DateTimeOffset dueTime, IScheduler scheduler)
- {
- #if !NO_PERF
- return new Delay<TSource>(source, dueTime, scheduler);
- #else
- return Observable.Defer(() =>
- {
- var timeSpan = dueTime.Subtract(scheduler.Now);
- return Delay_<TSource>(source, timeSpan, scheduler);
- });
- #endif
- }
- #endregion
- #region Duration selector
- public virtual IObservable<TSource> Delay<TSource, TDelay>(IObservable<TSource> source, Func<TSource, IObservable<TDelay>> delayDurationSelector)
- {
- return Delay_<TSource, TDelay>(source, null, delayDurationSelector);
- }
- public virtual IObservable<TSource> Delay<TSource, TDelay>(IObservable<TSource> source, IObservable<TDelay> subscriptionDelay, Func<TSource, IObservable<TDelay>> delayDurationSelector)
- {
- return Delay_<TSource, TDelay>(source, subscriptionDelay, delayDurationSelector);
- }
- private static IObservable<TSource> Delay_<TSource, TDelay>(IObservable<TSource> source, IObservable<TDelay> subscriptionDelay, Func<TSource, IObservable<TDelay>> delayDurationSelector)
- {
- #if !NO_PERF
- return new Delay<TSource, TDelay>(source, subscriptionDelay, delayDurationSelector);
- #else
- return new AnonymousObservable<TSource>(observer =>
- {
- var delays = new CompositeDisposable();
- var gate = new object();
- var atEnd = false;
- var done = new Action(() =>
- {
- if (atEnd && delays.Count == 0)
- {
- observer.OnCompleted();
- }
- });
- var subscription = new SerialDisposable();
- var start = new Action(() =>
- {
- subscription.Disposable = source.Subscribe(
- x =>
- {
- var delay = default(IObservable<TDelay>);
- try
- {
- delay = delayDurationSelector(x);
- }
- catch (Exception error)
- {
- lock (gate)
- observer.OnError(error);
- return;
- }
- var d = new SingleAssignmentDisposable();
- delays.Add(d);
- d.Disposable = delay.Subscribe(
- _ =>
- {
- lock (gate)
- {
- observer.OnNext(x);
- delays.Remove(d);
- done();
- }
- },
- exception =>
- {
- lock (gate)
- observer.OnError(exception);
- },
- () =>
- {
- lock (gate)
- {
- observer.OnNext(x);
- delays.Remove(d);
- done();
- }
- }
- );
- },
- exception =>
- {
- lock (gate)
- {
- observer.OnError(exception);
- }
- },
- () =>
- {
- lock (gate)
- {
- atEnd = true;
- subscription.Dispose();
- done();
- }
- }
- );
- });
- if (subscriptionDelay == null)
- {
- start();
- }
- else
- {
- subscription.Disposable = subscriptionDelay.Subscribe(
- _ =>
- {
- start();
- },
- observer.OnError,
- start
- );
- }
- return new CompositeDisposable(subscription, delays);
- });
- #endif
- }
- #endregion
- #endregion
- #region + DelaySubscription +
- public virtual IObservable<TSource> DelaySubscription<TSource>(IObservable<TSource> source, TimeSpan dueTime)
- {
- return DelaySubscription_<TSource>(source, dueTime, SchedulerDefaults.TimeBasedOperations);
- }
- public virtual IObservable<TSource> DelaySubscription<TSource>(IObservable<TSource> source, TimeSpan dueTime, IScheduler scheduler)
- {
- return DelaySubscription_<TSource>(source, dueTime, scheduler);
- }
- private static IObservable<TSource> DelaySubscription_<TSource>(IObservable<TSource> source, TimeSpan dueTime, IScheduler scheduler)
- {
- #if !NO_PERF
- return new DelaySubscription<TSource>(source, dueTime, scheduler);
- #else
- return new AnonymousObservable<TSource>(observer =>
- {
- var d = new MultipleAssignmentDisposable();
- var dt = Normalize(dueTime);
- d.Disposable = scheduler.Schedule(dt, () =>
- {
- d.Disposable = source.Subscribe(observer);
- });
- return d;
- });
- #endif
- }
- public virtual IObservable<TSource> DelaySubscription<TSource>(IObservable<TSource> source, DateTimeOffset dueTime)
- {
- return DelaySubscription_<TSource>(source, dueTime, SchedulerDefaults.TimeBasedOperations);
- }
- public virtual IObservable<TSource> DelaySubscription<TSource>(IObservable<TSource> source, DateTimeOffset dueTime, IScheduler scheduler)
- {
- return DelaySubscription_<TSource>(source, dueTime, scheduler);
- }
- private static IObservable<TSource> DelaySubscription_<TSource>(IObservable<TSource> source, DateTimeOffset dueTime, IScheduler scheduler)
- {
- #if !NO_PERF
- return new DelaySubscription<TSource>(source, dueTime, scheduler);
- #else
- return new AnonymousObservable<TSource>(observer =>
- {
- var d = new MultipleAssignmentDisposable();
- d.Disposable = scheduler.Schedule(dueTime, () =>
- {
- d.Disposable = source.Subscribe(observer);
- });
- return d;
- });
- #endif
- }
- #endregion
- #region + Generate +
- public virtual IObservable<TResult> Generate<TState, TResult>(TState initialState, Func<TState, bool> condition, Func<TState, TState> iterate, Func<TState, TResult> resultSelector, Func<TState, TimeSpan> timeSelector)
- {
- return Generate_<TState, TResult>(initialState, condition, iterate, resultSelector, timeSelector, SchedulerDefaults.TimeBasedOperations);
- }
- public virtual IObservable<TResult> Generate<TState, TResult>(TState initialState, Func<TState, bool> condition, Func<TState, TState> iterate, Func<TState, TResult> resultSelector, Func<TState, TimeSpan> timeSelector, IScheduler scheduler)
- {
- return Generate_<TState, TResult>(initialState, condition, iterate, resultSelector, timeSelector, scheduler);
- }
- private static IObservable<TResult> Generate_<TState, TResult>(TState initialState, Func<TState, bool> condition, Func<TState, TState> iterate, Func<TState, TResult> resultSelector, Func<TState, TimeSpan> timeSelector, IScheduler scheduler)
- {
- #if !NO_PERF
- return new Generate<TState, TResult>(initialState, condition, iterate, resultSelector, timeSelector, scheduler);
- #else
- return new AnonymousObservable<TResult>(observer =>
- {
- var state = initialState;
- var first = true;
- var hasResult = false;
- var result = default(TResult);
- var time = default(TimeSpan);
- return scheduler.Schedule(TimeSpan.Zero, self =>
- {
- if (hasResult)
- observer.OnNext(result);
- try
- {
- if (first)
- first = false;
- else
- state = iterate(state);
- hasResult = condition(state);
- if (hasResult)
- {
- result = resultSelector(state);
- time = timeSelector(state);
- }
- }
- catch (Exception exception)
- {
- observer.OnError(exception);
- return;
- }
- if (hasResult)
- self(time);
- else
- observer.OnCompleted();
- });
- });
- #endif
- }
- public virtual IObservable<TResult> Generate<TState, TResult>(TState initialState, Func<TState, bool> condition, Func<TState, TState> iterate, Func<TState, TResult> resultSelector, Func<TState, DateTimeOffset> timeSelector)
- {
- return Generate_<TState, TResult>(initialState, condition, iterate, resultSelector, timeSelector, SchedulerDefaults.TimeBasedOperations);
- }
- public virtual IObservable<TResult> Generate<TState, TResult>(TState initialState, Func<TState, bool> condition, Func<TState, TState> iterate, Func<TState, TResult> resultSelector, Func<TState, DateTimeOffset> timeSelector, IScheduler scheduler)
- {
- return Generate_<TState, TResult>(initialState, condition, iterate, resultSelector, timeSelector, scheduler);
- }
- private static IObservable<TResult> Generate_<TState, TResult>(TState initialState, Func<TState, bool> condition, Func<TState, TState> iterate, Func<TState, TResult> resultSelector, Func<TState, DateTimeOffset> timeSelector, IScheduler scheduler)
- {
- #if !NO_PERF
- return new Generate<TState, TResult>(initialState, condition, iterate, resultSelector, timeSelector, scheduler);
- #else
- return new AnonymousObservable<TResult>(observer =>
- {
- var state = initialState;
- var first = true;
- var hasResult = false;
- var result = default(TResult);
- var time = default(DateTimeOffset);
- return scheduler.Schedule(scheduler.Now, self =>
- {
- if (hasResult)
- observer.OnNext(result);
- try
- {
- if (first)
- first = false;
- else
- state = iterate(state);
- hasResult = condition(state);
- if (hasResult)
- {
- result = resultSelector(state);
- time = timeSelector(state);
- }
- }
- catch (Exception exception)
- {
- observer.OnError(exception);
- return;
- }
- if (hasResult)
- self(time);
- else
- observer.OnCompleted();
- });
- });
- #endif
- }
- #endregion
- #region + Interval +
- public virtual IObservable<long> Interval(TimeSpan period)
- {
- return Timer_(period, period, SchedulerDefaults.TimeBasedOperations);
- }
- public virtual IObservable<long> Interval(TimeSpan period, IScheduler scheduler)
- {
- return Timer_(period, period, scheduler);
- }
- #endregion
- #region + Sample +
- public virtual IObservable<TSource> Sample<TSource>(IObservable<TSource> source, TimeSpan interval)
- {
- return Sample_<TSource>(source, interval, SchedulerDefaults.TimeBasedOperations);
- }
- public virtual IObservable<TSource> Sample<TSource>(IObservable<TSource> source, TimeSpan interval, IScheduler scheduler)
- {
- return Sample_<TSource>(source, interval, scheduler);
- }
- private static IObservable<TSource> Sample_<TSource>(IObservable<TSource> source, TimeSpan interval, IScheduler scheduler)
- {
- #if !NO_PERF
- return new Sample<TSource>(source, interval, scheduler);
- #else
- var sampler = Observable.Interval(interval, scheduler);
- return Sample_<TSource, long>(source, sampler);
- #endif
- }
- public virtual IObservable<TSource> Sample<TSource, TSample>(IObservable<TSource> source, IObservable<TSample> sampler)
- {
- return Sample_<TSource, TSample>(source, sampler);
- }
- private static IObservable<TSource> Sample_<TSource, TSample>(IObservable<TSource> source, IObservable<TSample> sampler)
- {
- #if !NO_PERF
- return new Sample<TSource, TSample>(source, sampler);
- #else
- return Combine(source, sampler, (IObserver<TSource> observer, IDisposable leftSubscription, IDisposable rightSubscription) =>
- {
- var value = default(Notification<TSource>);
- var atEnd = false;
- return new BinaryObserver<TSource, TSample>(
- newValue =>
- {
- switch (newValue.Kind)
- {
- case NotificationKind.OnNext:
- value = newValue;
- break;
- case NotificationKind.OnError:
- newValue.Accept(observer);
- break;
- case NotificationKind.OnCompleted:
- atEnd = true;
- break;
- }
- },
- _ =>
- {
- var myValue = value;
- value = null;
- if (myValue != null)
- myValue.Accept(observer);
- if (atEnd)
- observer.OnCompleted();
- });
- });
- #endif
- }
- #endregion
- #region + Skip +
- public virtual IObservable<TSource> Skip<TSource>(IObservable<TSource> source, TimeSpan duration)
- {
- return Skip_<TSource>(source, duration, SchedulerDefaults.TimeBasedOperations);
- }
- public virtual IObservable<TSource> Skip<TSource>(IObservable<TSource> source, TimeSpan duration, IScheduler scheduler)
- {
- return Skip_<TSource>(source, duration, scheduler);
- }
- private static IObservable<TSource> Skip_<TSource>(IObservable<TSource> source, TimeSpan duration, IScheduler scheduler)
- {
- #if !NO_PERF
- var skip = source as Skip<TSource>;
- if (skip != null && skip._scheduler == scheduler)
- return skip.Omega(duration);
- return new Skip<TSource>(source, duration, scheduler);
- #else
- return new AnonymousObservable<TSource>(observer =>
- {
- var open = false;
- var t = scheduler.Schedule(duration, () => open = true);
- var d = source.Subscribe(
- x =>
- {
- if (open)
- observer.OnNext(x);
- },
- observer.OnError,
- observer.OnCompleted
- );
- return new CompositeDisposable(t, d);
- });
- #endif
- }
- #endregion
- #region + SkipLast +
- public virtual IObservable<TSource> SkipLast<TSource>(IObservable<TSource> source, TimeSpan duration)
- {
- return SkipLast_<TSource>(source, duration, SchedulerDefaults.TimeBasedOperations);
- }
- public virtual IObservable<TSource> SkipLast<TSource>(IObservable<TSource> source, TimeSpan duration, IScheduler scheduler)
- {
- return SkipLast_<TSource>(source, duration, scheduler);
- }
- private static IObservable<TSource> SkipLast_<TSource>(IObservable<TSource> source, TimeSpan duration, IScheduler scheduler)
- {
- #if !NO_PERF
- return new SkipLast<TSource>(source, duration, scheduler);
- #else
- return new AnonymousObservable<TSource>(observer =>
- {
- var q = new Queue<System.Reactive.TimeInterval<TSource>>();
- var swp = scheduler.AsStopwatchProvider();
- var sw = swp != null ? swp.StartStopwatch() : new DefaultStopwatch();
- return source.Subscribe(
- x =>
- {
- var now = sw.Elapsed;
- q.Enqueue(new System.Reactive.TimeInterval<TSource>(x, now));
- while (q.Count > 0 && now - q.Peek().Interval >= duration)
- observer.OnNext(q.Dequeue().Value);
- },
- observer.OnError,
- () =>
- {
- var now = sw.Elapsed;
- while (q.Count > 0 && now - q.Peek().Interval >= duration)
- observer.OnNext(q.Dequeue().Value);
- observer.OnCompleted();
- }
- );
- });
- #endif
- }
- #endregion
- #region + SkipUntil +
- public virtual IObservable<TSource> SkipUntil<TSource>(IObservable<TSource> source, DateTimeOffset startTime)
- {
- return SkipUntil_<TSource>(source, startTime, SchedulerDefaults.TimeBasedOperations);
- }
- public virtual IObservable<TSource> SkipUntil<TSource>(IObservable<TSource> source, DateTimeOffset startTime, IScheduler scheduler)
- {
- return SkipUntil_<TSource>(source, startTime, scheduler);
- }
- private static IObservable<TSource> SkipUntil_<TSource>(IObservable<TSource> source, DateTimeOffset startTime, IScheduler scheduler)
- {
- #if !NO_PERF
- var skipUntil = source as SkipUntil<TSource>;
- if (skipUntil != null && skipUntil._scheduler == scheduler)
- return skipUntil.Omega(startTime);
- return new SkipUntil<TSource>(source, startTime, scheduler);
- #else
- return new AnonymousObservable<TSource>(observer =>
- {
- var open = false;
- var t = scheduler.Schedule(startTime, () => open = true);
- var d = source.Subscribe(
- x =>
- {
- if (open)
- observer.OnNext(x);
- },
- observer.OnError,
- observer.OnCompleted
- );
- return new CompositeDisposable(t, d);
- });
- #endif
- }
- #endregion
- #region + Take +
- public virtual IObservable<TSource> Take<TSource>(IObservable<TSource> source, TimeSpan duration)
- {
- return Take_<TSource>(source, duration, SchedulerDefaults.TimeBasedOperations);
- }
- public virtual IObservable<TSource> Take<TSource>(IObservable<TSource> source, TimeSpan duration, IScheduler scheduler)
- {
- return Take_<TSource>(source, duration, scheduler);
- }
- private static IObservable<TSource> Take_<TSource>(IObservable<TSource> source, TimeSpan duration, IScheduler scheduler)
- {
- #if !NO_PERF
- var take = source as Take<TSource>;
- if (take != null && take._scheduler == scheduler)
- return take.Omega(duration);
- return new Take<TSource>(source, duration, scheduler);
- #else
- return new AnonymousObservable<TSource>(observer =>
- {
- var gate = new object();
- var t = scheduler.Schedule(duration, () =>
- {
- lock (gate)
- {
- observer.OnCompleted();
- }
- });
- var d = source.Synchronize(gate).Subscribe(observer);
- return new CompositeDisposable(t, d);
- });
- #endif
- }
- #endregion
- #region + TakeLast +
- public virtual IObservable<TSource> TakeLast<TSource>(IObservable<TSource> source, TimeSpan duration)
- {
- return TakeLast_<TSource>(source, duration, SchedulerDefaults.TimeBasedOperations, SchedulerDefaults.Iteration);
- }
- public virtual IObservable<TSource> TakeLast<TSource>(IObservable<TSource> source, TimeSpan duration, IScheduler scheduler)
- {
- return TakeLast_<TSource>(source, duration, scheduler, SchedulerDefaults.Iteration);
- }
- public virtual IObservable<TSource> TakeLast<TSource>(IObservable<TSource> source, TimeSpan duration, IScheduler timerScheduler, IScheduler loopScheduler)
- {
- return TakeLast_<TSource>(source, duration, timerScheduler, loopScheduler);
- }
- private static IObservable<TSource> TakeLast_<TSource>(IObservable<TSource> source, TimeSpan duration, IScheduler timerScheduler, IScheduler loopScheduler)
- {
- #if !NO_PERF
- return new TakeLast<TSource>(source, duration, timerScheduler, loopScheduler);
- #else
- return new AnonymousObservable<TSource>(observer =>
- {
- var q = new Queue<System.Reactive.TimeInterval<TSource>>();
- var swp = timerScheduler.AsStopwatchProvider();
- var sw = swp != null ? swp.StartStopwatch() : new DefaultStopwatch();
- var trim = new Action<TimeSpan>(now =>
- {
- while (q.Count > 0 && now - q.Peek().Interval >= duration)
- q.Dequeue();
- });
- var g = new CompositeDisposable();
- g.Add(source.Subscribe(
- x =>
- {
- var now = sw.Elapsed;
- q.Enqueue(new System.Reactive.TimeInterval<TSource>(x, now));
- trim(now);
- },
- observer.OnError,
- () =>
- {
- var now = sw.Elapsed;
- trim(now);
- g.Add(loopScheduler.Schedule(rec =>
- {
- if (q.Count > 0)
- {
- observer.OnNext(q.Dequeue().Value);
- rec();
- }
- else
- {
- observer.OnCompleted();
- }
- }));
- }
- ));
- return g;
- });
- #endif
- }
- public virtual IObservable<IList<TSource>> TakeLastBuffer<TSource>(IObservable<TSource> source, TimeSpan duration)
- {
- return TakeLastBuffer_<TSource>(source, duration, SchedulerDefaults.TimeBasedOperations);
- }
- public virtual IObservable<IList<TSource>> TakeLastBuffer<TSource>(IObservable<TSource> source, TimeSpan duration, IScheduler scheduler)
- {
- return TakeLastBuffer_<TSource>(source, duration, scheduler);
- }
- private static IObservable<IList<TSource>> TakeLastBuffer_<TSource>(IObservable<TSource> source, TimeSpan duration, IScheduler scheduler)
- {
- #if !NO_PERF
- return new TakeLastBuffer<TSource>(source, duration, scheduler);
- #else
- return new AnonymousObservable<IList<TSource>>(observer =>
- {
- var q = new Queue<System.Reactive.TimeInterval<TSource>>();
- var swp = scheduler.AsStopwatchProvider();
- var sw = swp != null ? swp.StartStopwatch() : new DefaultStopwatch();
- return source.Subscribe(
- x =>
- {
- var now = sw.Elapsed;
- q.Enqueue(new System.Reactive.TimeInterval<TSource>(x, now));
- while (q.Count > 0 && now - q.Peek().Interval >= duration)
- q.Dequeue();
- },
- observer.OnError,
- () =>
- {
- var now = sw.Elapsed;
- var res = new List<TSource>();
- while (q.Count > 0)
- {
- var next = q.Dequeue();
- if (now - next.Interval <= duration)
- res.Add(next.Value);
- }
-
- observer.OnNext(res);
- observer.OnCompleted();
- }
- );
- });
- #endif
- }
- #endregion
- #region + TakeUntil +
- public virtual IObservable<TSource> TakeUntil<TSource>(IObservable<TSource> source, DateTimeOffset endTime)
- {
- return TakeUntil_<TSource>(source, endTime, SchedulerDefaults.TimeBasedOperations);
- }
- public virtual IObservable<TSource> TakeUntil<TSource>(IObservable<TSource> source, DateTimeOffset endTime, IScheduler scheduler)
- {
- return TakeUntil_<TSource>(source, endTime, scheduler);
- }
- private static IObservable<TSource> TakeUntil_<TSource>(IObservable<TSource> source, DateTimeOffset endTime, IScheduler scheduler)
- {
- #if !NO_PERF
- var takeUntil = source as TakeUntil<TSource>;
- if (takeUntil != null && takeUntil._scheduler == scheduler)
- return takeUntil.Omega(endTime);
- return new TakeUntil<TSource>(source, endTime, scheduler);
- #else
- return new AnonymousObservable<TSource>(observer =>
- {
- var gate = new object();
- var t = scheduler.Schedule(endTime, () =>
- {
- lock (gate)
- {
- observer.OnCompleted();
- }
- });
- var d = source.Synchronize(gate).Subscribe(observer);
- return new CompositeDisposable(t, d);
- });
- #endif
- }
- #endregion
- #region + Throttle +
- public virtual IObservable<TSource> Throttle<TSource>(IObservable<TSource> source, TimeSpan dueTime)
- {
- return Throttle_<TSource>(source, dueTime, SchedulerDefaults.TimeBasedOperations);
- }
- public virtual IObservable<TSource> Throttle<TSource>(IObservable<TSource> source, TimeSpan dueTime, IScheduler scheduler)
- {
- return Throttle_<TSource>(source, dueTime, scheduler);
- }
- private static IObservable<TSource> Throttle_<TSource>(IObservable<TSource> source, TimeSpan dueTime, IScheduler scheduler)
- {
- #if !NO_PERF
- return new Throttle<TSource>(source, dueTime, scheduler);
- #else
- return new AnonymousObservable<TSource>(observer =>
- {
- var gate = new object();
- var value = default(TSource);
- var hasValue = false;
- var cancelable = new SerialDisposable();
- var id = 0UL;
- var subscription = source.Subscribe(x =>
- {
- ulong currentid;
- lock (gate)
- {
- hasValue = true;
- value = x;
- id = unchecked(id + 1);
- currentid = id;
- }
- var d = new SingleAssignmentDisposable();
- cancelable.Disposable = d;
- d.Disposable = scheduler.Schedule(dueTime, () =>
- {
- lock (gate)
- {
- if (hasValue && id == currentid)
- observer.OnNext(value);
- hasValue = false;
- }
- });
- },
- exception =>
- {
- cancelable.Dispose();
- lock (gate)
- {
- observer.OnError(exception);
- hasValue = false;
- id = unchecked(id + 1);
- }
- },
- () =>
- {
- cancelable.Dispose();
- lock (gate)
- {
- if (hasValue)
- observer.OnNext(value);
- observer.OnCompleted();
- hasValue = false;
- id = unchecked(id + 1);
- }
- });
- return new CompositeDisposable(subscription, cancelable);
- });
- #endif
- }
- public virtual IObservable<TSource> Throttle<TSource, TThrottle>(IObservable<TSource> source, Func<TSource, IObservable<TThrottle>> throttleDurationSelector)
- {
- #if !NO_PERF
- return new Throttle<TSource, TThrottle>(source, throttleDurationSelector);
- #else
- return new AnonymousObservable<TSource>(observer =>
- {
- var gate = new object();
- var value = default(TSource);
- var hasValue = false;
- var cancelable = new SerialDisposable();
- var id = 0UL;
- var subscription = source.Subscribe(
- x =>
- {
- var throttle = default(IObservable<TThrottle>);
- try
- {
- throttle = throttleDurationSelector(x);
- }
- catch (Exception error)
- {
- lock (gate)
- observer.OnError(error);
- return;
- }
- ulong currentid;
- lock (gate)
- {
- hasValue = true;
- value = x;
- id = unchecked(id + 1);
- currentid = id;
- }
- var d = new SingleAssignmentDisposable();
- cancelable.Disposable = d;
- d.Disposable = throttle.Subscribe(
- _ =>
- {
- lock (gate)
- {
- if (hasValue && id == currentid)
- observer.OnNext(value);
- hasValue = false;
- d.Dispose();
- }
- },
- exception =>
- {
- lock (gate)
- {
- observer.OnError(exception);
- }
- },
- () =>
- {
- lock (gate)
- {
- if (hasValue && id == currentid)
- observer.OnNext(value);
- hasValue = false;
- d.Dispose();
- }
- }
- );
- },
- exception =>
- {
- cancelable.Dispose();
- lock (gate)
- {
- observer.OnError(exception);
- hasValue = false;
- id = unchecked(id + 1);
- }
- },
- () =>
- {
- cancelable.Dispose();
- lock (gate)
- {
- if (hasValue)
- observer.OnNext(value);
- observer.OnCompleted();
- hasValue = false;
- id = unchecked(id + 1);
- }
- });
- return new CompositeDisposable(subscription, cancelable);
- });
- #endif
- }
- #endregion
- #region + TimeInterval +
- public virtual IObservable<System.Reactive.TimeInterval<TSource>> TimeInterval<TSource>(IObservable<TSource> source)
- {
- return TimeInterval_<TSource>(source, SchedulerDefaults.TimeBasedOperations);
- }
- public virtual IObservable<System.Reactive.TimeInterval<TSource>> TimeInterval<TSource>(IObservable<TSource> source, IScheduler scheduler)
- {
- return TimeInterval_<TSource>(source, scheduler);
- }
- #if !NO_PERF
- private static IObservable<System.Reactive.TimeInterval<TSource>> TimeInterval_<TSource>(IObservable<TSource> source, IScheduler scheduler)
- {
- return new TimeInterval<TSource>(source, scheduler);
- }
- #else
- private IObservable<System.Reactive.TimeInterval<TSource>> TimeInterval_<TSource>(IObservable<TSource> source, IScheduler scheduler)
- {
- return Defer(() =>
- {
- var last = scheduler.Now;
- return source.Select(x =>
- {
- var now = scheduler.Now;
- var span = now.Subtract(last);
- last = now;
- return new System.Reactive.TimeInterval<TSource>(x, span);
- });
- });
- }
- #endif
- #endregion
- #region + Timeout +
- #region TimeSpan
- public virtual IObservable<TSource> Timeout<TSource>(IObservable<TSource> source, TimeSpan dueTime)
- {
- return Timeout_<TSource>(source, dueTime, Observable.Throw<TSource>(new TimeoutException()), SchedulerDefaults.TimeBasedOperations);
- }
- public virtual IObservable<TSource> Timeout<TSource>(IObservable<TSource> source, TimeSpan dueTime, IScheduler scheduler)
- {
- return Timeout_<TSource>(source, dueTime, Observable.Throw<TSource>(new TimeoutException()), scheduler);
- }
- public virtual IObservable<TSource> Timeout<TSource>(IObservable<TSource> source, TimeSpan dueTime, IObservable<TSource> other)
- {
- return Timeout_<TSource>(source, dueTime, other, SchedulerDefaults.TimeBasedOperations);
- }
- public virtual IObservable<TSource> Timeout<TSource>(IObservable<TSource> source, TimeSpan dueTime, IObservable<TSource> other, IScheduler scheduler)
- {
- return Timeout_<TSource>(source, dueTime, other, scheduler);
- }
- private static IObservable<TSource> Timeout_<TSource>(IObservable<TSource> source, TimeSpan dueTime, IObservable<TSource> other, IScheduler scheduler)
- {
- #if !NO_PERF
- return new Timeout<TSource>(source, dueTime, other, scheduler);
- #else
- return new AnonymousObservable<TSource>(observer =>
- {
- var subscription = new SerialDisposable();
- var timer = new SerialDisposable();
- var original = new SingleAssignmentDisposable();
- subscription.Disposable = original;
- var gate = new object();
- var id = 0UL;
- var switched = false;
- Action createTimer = () =>
- {
- var myid = id;
- timer.Disposable = scheduler.Schedule(dueTime, () =>
- {
- var timerWins = false;
- lock (gate)
- {
- switched = (id == myid);
- timerWins = switched;
- }
- if (timerWins)
- subscription.Disposable = other.Subscribe(observer);
- });
- };
- createTimer();
- original.Disposable = source.Subscribe(
- x =>
- {
- var onNextWins = false;
- lock (gate)
- {
- onNextWins = !switched;
- if (onNextWins)
- {
- id = unchecked(id + 1);
- }
- }
- if (onNextWins)
- {
- observer.OnNext(x);
- createTimer();
- }
- },
- exception =>
- {
- var onErrorWins = false;
- lock (gate)
- {
- onErrorWins = !switched;
- if (onErrorWins)
- {
- id = unchecked(id + 1);
- }
- }
- if (onErrorWins)
- observer.OnError(exception);
- },
- () =>
- {
- var onCompletedWins = false;
- lock (gate)
- {
- onCompletedWins = !switched;
- if (onCompletedWins)
- {
- id = unchecked(id + 1);
- }
- }
- if (onCompletedWins)
- observer.OnCompleted();
- });
- return new CompositeDisposable(subscription, timer);
- });
- #endif
- }
- #endregion
- #region DateTimeOffset
- public virtual IObservable<TSource> Timeout<TSource>(IObservable<TSource> source, DateTimeOffset dueTime)
- {
- return Timeout_<TSource>(source, dueTime, Observable.Throw<TSource>(new TimeoutException()), SchedulerDefaults.TimeBasedOperations);
- }
- public virtual IObservable<TSource> Timeout<TSource>(IObservable<TSource> source, DateTimeOffset dueTime, IScheduler scheduler)
- {
- return Timeout_<TSource>(source, dueTime, Observable.Throw<TSource>(new TimeoutException()), scheduler);
- }
- public virtual IObservable<TSource> Timeout<TSource>(IObservable<TSource> source, DateTimeOffset dueTime, IObservable<TSource> other)
- {
- return Timeout_<TSource>(source, dueTime, other, SchedulerDefaults.TimeBasedOperations);
- }
- public virtual IObservable<TSource> Timeout<TSource>(IObservable<TSource> source, DateTimeOffset dueTime, IObservable<TSource> other, IScheduler scheduler)
- {
- return Timeout_<TSource>(source, dueTime, other, scheduler);
- }
- private static IObservable<TSource> Timeout_<TSource>(IObservable<TSource> source, DateTimeOffset dueTime, IObservable<TSource> other, IScheduler scheduler)
- {
- #if !NO_PERF
- return new Timeout<TSource>(source, dueTime, other, scheduler);
- #else
- return new AnonymousObservable<TSource>(observer =>
- {
- var subscription = new SerialDisposable();
- var original = new SingleAssignmentDisposable();
- subscription.Disposable = original;
- var gate = new object();
- var switched = false;
- var timer = scheduler.Schedule(dueTime, () =>
- {
- var timerWins = false;
- lock (gate)
- {
- timerWins = !switched;
- switched = true;
- }
- if (timerWins)
- subscription.Disposable = other.Subscribe(observer);
- });
- original.Disposable = source.Subscribe(
- x =>
- {
- lock (gate)
- {
- if (!switched)
- observer.OnNext(x);
- }
- },
- exception =>
- {
- var onErrorWins = false;
- lock (gate)
- {
- onErrorWins = !switched;
- switched = true;
- }
- if (onErrorWins)
- observer.OnError(exception);
- },
- () =>
- {
- var onCompletedWins = false;
- lock (gate)
- {
- onCompletedWins = !switched;
- switched = true;
- }
- if (onCompletedWins)
- observer.OnCompleted();
- });
- return new CompositeDisposable(subscription, timer);
- });
- #endif
- }
- #endregion
- #region Duration selector
- public virtual IObservable<TSource> Timeout<TSource, TTimeout>(IObservable<TSource> source, Func<TSource, IObservable<TTimeout>> timeoutDurationSelector)
- {
- return Timeout_<TSource, TTimeout>(source, Observable.Never<TTimeout>(), timeoutDurationSelector, Observable.Throw<TSource>(new TimeoutException()));
- }
- public virtual IObservable<TSource> Timeout<TSource, TTimeout>(IObservable<TSource> source, Func<TSource, IObservable<TTimeout>> timeoutDurationSelector, IObservable<TSource> other)
- {
- return Timeout_<TSource, TTimeout>(source, Observable.Never<TTimeout>(), timeoutDurationSelector, other);
- }
- public virtual IObservable<TSource> Timeout<TSource, TTimeout>(IObservable<TSource> source, IObservable<TTimeout> firstTimeout, Func<TSource, IObservable<TTimeout>> timeoutDurationSelector)
- {
- return Timeout_<TSource, TTimeout>(source, firstTimeout, timeoutDurationSelector, Observable.Throw<TSource>(new TimeoutException()));
- }
- public virtual IObservable<TSource> Timeout<TSource, TTimeout>(IObservable<TSource> source, IObservable<TTimeout> firstTimeout, Func<TSource, IObservable<TTimeout>> timeoutDurationSelector, IObservable<TSource> other)
- {
- return Timeout_<TSource, TTimeout>(source, firstTimeout, timeoutDurationSelector, other);
- }
- private static IObservable<TSource> Timeout_<TSource, TTimeout>(IObservable<TSource> source, IObservable<TTimeout> firstTimeout, Func<TSource, IObservable<TTimeout>> timeoutDurationSelector, IObservable<TSource> other)
- {
- #if !NO_PERF
- return new Timeout<TSource, TTimeout>(source, firstTimeout, timeoutDurationSelector, other);
- #else
- return new AnonymousObservable<TSource>(observer =>
- {
- var subscription = new SerialDisposable();
- var timer = new SerialDisposable();
- var original = new SingleAssignmentDisposable();
- subscription.Disposable = original;
- var gate = new object();
- var id = 0UL;
- var switched = false;
- Action<IObservable<TTimeout>> setTimer = timeout =>
- {
- var myid = id;
- Func<bool> timerWins = () =>
- {
- var res = false;
- lock (gate)
- {
- switched = (id == myid);
- res = switched;
- }
- return res;
- };
- var d = new SingleAssignmentDisposable();
- timer.Disposable = d;
- d.Disposable = timeout.Subscribe(
- _ =>
- {
- if (timerWins())
- subscription.Disposable = other.Subscribe(observer);
- d.Dispose();
- },
- error =>
- {
- if (timerWins())
- observer.OnError(error);
- },
- () =>
- {
- if (timerWins())
- subscription.Disposable = other.Subscribe(observer);
- }
- );
- };
- setTimer(firstTimeout);
- Func<bool> observerWins = () =>
- {
- var res = false;
- lock (gate)
- {
- res = !switched;
- if (res)
- {
- id = unchecked(id + 1);
- }
- }
- return res;
- };
- original.Disposable = source.Subscribe(
- x =>
- {
- if (observerWins())
- {
- observer.OnNext(x);
- var timeout = default(IObservable<TTimeout>);
- try
- {
- timeout = timeoutDurationSelector(x);
- }
- catch (Exception error)
- {
- observer.OnError(error);
- return;
- }
- setTimer(timeout);
- }
- },
- exception =>
- {
- if (observerWins())
- observer.OnError(exception);
- },
- () =>
- {
- if (observerWins())
- observer.OnCompleted();
- }
- );
- return new CompositeDisposable(subscription, timer);
- });
- #endif
- }
- #endregion
- #endregion
- #region + Timer +
- public virtual IObservable<long> Timer(TimeSpan dueTime)
- {
- return Timer_(dueTime, SchedulerDefaults.TimeBasedOperations);
- }
- public virtual IObservable<long> Timer(DateTimeOffset dueTime)
- {
- return Timer_(dueTime, SchedulerDefaults.TimeBasedOperations);
- }
- public virtual IObservable<long> Timer(TimeSpan dueTime, TimeSpan period)
- {
- return Timer_(dueTime, period, SchedulerDefaults.TimeBasedOperations);
- }
- public virtual IObservable<long> Timer(DateTimeOffset dueTime, TimeSpan period)
- {
- return Timer_(dueTime, period, SchedulerDefaults.TimeBasedOperations);
- }
- public virtual IObservable<long> Timer(TimeSpan dueTime, IScheduler scheduler)
- {
- return Timer_(dueTime, scheduler);
- }
- public virtual IObservable<long> Timer(DateTimeOffset dueTime, IScheduler scheduler)
- {
- return Timer_(dueTime, scheduler);
- }
- public virtual IObservable<long> Timer(TimeSpan dueTime, TimeSpan period, IScheduler scheduler)
- {
- return Timer_(dueTime, period, scheduler);
- }
- public virtual IObservable<long> Timer(DateTimeOffset dueTime, TimeSpan period, IScheduler scheduler)
- {
- return Timer_(dueTime, period, scheduler);
- }
- private static IObservable<long> Timer_(TimeSpan dueTime, IScheduler scheduler)
- {
- #if !NO_PERF
- return new Timer(dueTime, null, scheduler);
- #else
- var d = Normalize(dueTime);
- return new AnonymousObservable<long>(observer =>
- scheduler.Schedule(d, () =>
- {
- observer.OnNext(0);
- observer.OnCompleted();
- }));
- #endif
- }
- #if !NO_PERF
- private static IObservable<long> Timer_(TimeSpan dueTime, TimeSpan period, IScheduler scheduler)
- {
- return new Timer(dueTime, period, scheduler);
- }
- #else
- private IObservable<long> Timer_(TimeSpan dueTime, TimeSpan period, IScheduler scheduler)
- {
- var p = Normalize(period);
- return Defer(() => Timer(scheduler.Now + dueTime, p, scheduler));
- }
- #endif
- private static IObservable<long> Timer_(DateTimeOffset dueTime, IScheduler scheduler)
- {
- #if !NO_PERF
- return new Timer(dueTime, null, scheduler);
- #else
- return new AnonymousObservable<long>(observer =>
- scheduler.Schedule(dueTime, () =>
- {
- observer.OnNext(0);
- observer.OnCompleted();
- }));
- #endif
- }
- private static IObservable<long> Timer_(DateTimeOffset dueTime, TimeSpan period, IScheduler scheduler)
- {
- #if !NO_PERF
- return new Timer(dueTime, period, scheduler);
- #else
- var p = Normalize(period);
- return new AnonymousObservable<long>(observer =>
- {
- var d = dueTime;
- var count = 0L;
- return scheduler.Schedule(d, self =>
- {
- if (p > TimeSpan.Zero)
- {
- var now = scheduler.Now;
- d = d + p;
- if (d <= now)
- d = now + p;
- }
- observer.OnNext(count);
- count = unchecked(count + 1);
- self(d);
- });
- });
- #endif
- }
- #endregion
- #region + Timestamp +
- public virtual IObservable<Timestamped<TSource>> Timestamp<TSource>(IObservable<TSource> source)
- {
- return Timestamp_<TSource>(source, SchedulerDefaults.TimeBasedOperations);
- }
- public virtual IObservable<Timestamped<TSource>> Timestamp<TSource>(IObservable<TSource> source, IScheduler scheduler)
- {
- return Timestamp_<TSource>(source, scheduler);
- }
- private static IObservable<Timestamped<TSource>> Timestamp_<TSource>(IObservable<TSource> source, IScheduler scheduler)
- {
- #if !NO_PERF
- return new Timestamp<TSource>(source, scheduler);
- #else
- return source.Select(x => new Timestamped<TSource>(x, scheduler.Now));
- #endif
- }
- #endregion
- #region + Window +
- #region TimeSpan only
- public virtual IObservable<IObservable<TSource>> Window<TSource>(IObservable<TSource> source, TimeSpan timeSpan)
- {
- return Window_<TSource>(source, timeSpan, timeSpan, SchedulerDefaults.TimeBasedOperations);
- }
- public virtual IObservable<IObservable<TSource>> Window<TSource>(IObservable<TSource> source, TimeSpan timeSpan, IScheduler scheduler)
- {
- return Window_<TSource>(source, timeSpan, timeSpan, scheduler);
- }
- public virtual IObservable<IObservable<TSource>> Window<TSource>(IObservable<TSource> source, TimeSpan timeSpan, TimeSpan timeShift)
- {
- return Window_<TSource>(source, timeSpan, timeShift, SchedulerDefaults.TimeBasedOperations);
- }
- public virtual IObservable<IObservable<TSource>> Window<TSource>(IObservable<TSource> source, TimeSpan timeSpan, TimeSpan timeShift, IScheduler scheduler)
- {
- return Window_<TSource>(source, timeSpan, timeShift, scheduler);
- }
- private static IObservable<IObservable<TSource>> Window_<TSource>(IObservable<TSource> source, TimeSpan timeSpan, TimeSpan timeShift, IScheduler scheduler)
- {
- #if !NO_PERF
- return new Window<TSource>(source, timeSpan, timeShift, scheduler);
- #else
- return new AnonymousObservable<IObservable<TSource>>(observer =>
- {
- var totalTime = TimeSpan.Zero;
- var nextShift = timeShift;
- var nextSpan = timeSpan;
- var gate = new object();
- var q = new Queue<ISubject<TSource>>();
- var timerD = new SerialDisposable();
- var groupDisposable = new CompositeDisposable(2) { timerD };
- var refCountDisposable = new RefCountDisposable(groupDisposable);
- var createTimer = default(Action);
- createTimer = () =>
- {
- var m = new SingleAssignmentDisposable();
- timerD.Disposable = m;
- var isSpan = false;
- var isShift = false;
- if (nextSpan == nextShift)
- {
- isSpan = true;
- isShift = true;
- }
- else if (nextSpan < nextShift)
- isSpan = true;
- else
- isShift = true;
- var newTotalTime = isSpan ? nextSpan : nextShift;
- var ts = newTotalTime - totalTime;
- totalTime = newTotalTime;
- if (isSpan)
- nextSpan += timeShift;
- if (isShift)
- nextShift += timeShift;
- m.Disposable = scheduler.Schedule(ts, () =>
- {
- lock (gate)
- {
- if (isShift)
- {
- var s = new Subject<TSource>();
- q.Enqueue(s);
- observer.OnNext(s.AddRef(refCountDisposable));
- }
- if (isSpan)
- {
- var s = q.Dequeue();
- s.OnCompleted();
- }
- }
- createTimer();
- });
- };
- q.Enqueue(new Subject<TSource>());
- observer.OnNext(q.Peek().AddRef(refCountDisposable));
- createTimer();
- groupDisposable.Add(source.Subscribe(
- x =>
- {
- lock (gate)
- {
- foreach (var s in q)
- s.OnNext(x);
- }
- },
- exception =>
- {
- lock (gate)
- {
- foreach (var s in q)
- s.OnError(exception);
- observer.OnError(exception);
- }
- },
- () =>
- {
- lock (gate)
- {
- foreach (var s in q)
- s.OnCompleted();
- observer.OnCompleted();
- }
- }
- ));
- return refCountDisposable;
- });
- #endif
- }
- #endregion
- #region TimeSpan + int
- public virtual IObservable<IObservable<TSource>> Window<TSource>(IObservable<TSource> source, TimeSpan timeSpan, int count)
- {
- return Window_<TSource>(source, timeSpan, count, SchedulerDefaults.TimeBasedOperations);
- }
- public virtual IObservable<IObservable<TSource>> Window<TSource>(IObservable<TSource> source, TimeSpan timeSpan, int count, IScheduler scheduler)
- {
- return Window_<TSource>(source, timeSpan, count, scheduler);
- }
- private static IObservable<IObservable<TSource>> Window_<TSource>(IObservable<TSource> source, TimeSpan timeSpan, int count, IScheduler scheduler)
- {
- #if !NO_PERF
- return new Window<TSource>(source, timeSpan, count, scheduler);
- #else
- return new AnonymousObservable<IObservable<TSource>>(observer =>
- {
- var gate = new object();
- var s = default(ISubject<TSource>);
- var n = 0;
- var windowId = 0;
- var timerD = new SerialDisposable();
- var groupDisposable = new CompositeDisposable(2) { timerD };
- var refCountDisposable = new RefCountDisposable(groupDisposable);
- var createTimer = default(Action<int>);
- createTimer = id =>
- {
- var m = new SingleAssignmentDisposable();
- timerD.Disposable = m;
- m.Disposable = scheduler.Schedule(timeSpan, () =>
- {
- var newId = 0;
- lock (gate)
- {
- if (id != windowId)
- return;
- n = 0;
- newId = ++windowId;
- s.OnCompleted();
- s = new Subject<TSource>();
- observer.OnNext(s.AddRef(refCountDisposable));
- }
- createTimer(newId);
- });
- };
- s = new Subject<TSource>();
- observer.OnNext(s.AddRef(refCountDisposable));
- createTimer(0);
- groupDisposable.Add(source.Subscribe(
- x =>
- {
- var newWindow = false;
- var newId = 0;
- lock (gate)
- {
- s.OnNext(x);
- n++;
- if (n == count)
- {
- newWindow = true;
- n = 0;
- newId = ++windowId;
- s.OnCompleted();
- s = new Subject<TSource>();
- observer.OnNext(s.AddRef(refCountDisposable));
- }
- }
- if (newWindow)
- createTimer(newId);
- },
- exception =>
- {
- lock (gate)
- {
- s.OnError(exception);
- observer.OnError(exception);
- }
- },
- () =>
- {
- lock (gate)
- {
- s.OnCompleted();
- observer.OnCompleted();
- }
- }
- ));
- return refCountDisposable;
- });
- #endif
- }
- #endregion
- #endregion
- #region |> Helpers <|
- #if NO_PERF
- private static TimeSpan Normalize(TimeSpan timeSpan)
- {
- if (timeSpan.CompareTo(TimeSpan.Zero) < 0)
- return TimeSpan.Zero;
- return timeSpan;
- }
- #endif
- #endregion
- }
- }
|