Class AsyncTrigger

Represents asynchronous trigger that allows to resume and suspend concurrent flows.

Inheritance

object

Disposable

QueuedSynchronizer

AsyncTrigger

Implements

IAsyncEvent

IDisposable

IResettable

Inherited Members

QueuedSynchronizer.MeasurementTags

QueuedSynchronizer.TrackSuspendedCallers(Func<object>)

QueuedSynchronizer.SetCallerInformation(object)

QueuedSynchronizer.GetSuspendedCallers()

QueuedSynchronizer.CancelSuspendedCallers(CancellationToken)

QueuedSynchronizer.Dispose(bool)

QueuedSynchronizer.Dispose(Exception)

QueuedSynchronizer.DisposeAsyncCore()

QueuedSynchronizer.DisposeAsync()

Disposable.IsDisposed

Disposable.IsDisposing

Disposable.IsDisposingOrDisposed

Disposable.CreateException()

Disposable.DisposedTask

Disposable.GetDisposedTask<T>()

Disposable.TrySetDisposedException<T>(TaskCompletionSource<T>)

Disposable.TrySetDisposedException(TaskCompletionSource)

Disposable.TryBeginDispose()

Disposable.Dispose()

Disposable.Dispose(IEnumerable<IDisposable>)

Disposable.DisposeAsync(IEnumerable<IAsyncDisposable>)

Disposable.Dispose<T>(ReadOnlySpan<T>)

Disposable.DisposeAsync(params IAsyncDisposable[])

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: DotNext.Threading

Assembly: DotNext.Threading.dll

Syntax

public class AsyncTrigger : QueuedSynchronizer, IAsyncEvent, IDisposable, IResettable

Constructors

AsyncTrigger()

Initializes a new trigger.

Declaration

public AsyncTrigger()

AsyncTrigger(int)

Initializes a new trigger.

Declaration

public AsyncTrigger(int concurrencyLevel)

Parameters

Type	Name	Description
int	concurrencyLevel	The expected number of concurrent flows.

Exceptions

Type	Condition
ArgumentOutOfRangeException	concurrencyLevel is less than or equal to zero.

Methods

Signal(bool)

Resumes the first suspended caller in the wait queue.

Declaration

public bool Signal(bool resumeAll = false)

Parameters

Type	Name	Description
bool	resumeAll	true to resume all suspended callers in the queue; false to resume the first suspended caller in the queue.

Returns

Type	Description
bool	true if at least one suspended caller has been resumed; otherwise, false.

Exceptions

Type	Condition
ObjectDisposedException	This trigger has been disposed.

SignalAndWaitAsync(bool, bool, CancellationToken)

Resumes the first suspended caller in the queue and suspends the immediate caller.

Declaration

public ValueTask SignalAndWaitAsync(bool resumeAll, bool throwOnEmptyQueue, CancellationToken token = default)

Parameters

Type	Name	Description
bool	resumeAll	true to resume all suspended callers in the queue; false to resume the first suspended caller in the queue.
bool	throwOnEmptyQueue	true to throw InvalidOperationException if there is no suspended callers to resume; false to suspend the caller.
CancellationToken	token	The token that can be used to cancel the operation.

Returns

Type	Description
ValueTask	The task representing asynchronous execution of this method.

Exceptions

Type	Condition
ObjectDisposedException	This trigger has been disposed.
OperationCanceledException	The operation has been canceled.
InvalidOperationException	throwOnEmptyQueue is true and no suspended callers in the queue.

SignalAndWaitAsync(bool, bool, TimeSpan, CancellationToken)

Resumes the first suspended caller in the queue and suspends the immediate caller.

Declaration

public ValueTask<bool> SignalAndWaitAsync(bool resumeAll, bool throwOnEmptyQueue, TimeSpan timeout, CancellationToken token = default)

Parameters

Type	Name	Description
bool	resumeAll	true to resume all suspended callers in the queue; false to resume the first suspended caller in the queue.
bool	throwOnEmptyQueue	true to throw InvalidOperationException if there is no suspended callers to resume; false to suspend the caller.
TimeSpan	timeout	The time to wait for the signal.
CancellationToken	token	The token that can be used to cancel the operation.

Returns

Type	Description
ValueTask<bool>	true if event is triggered in timely manner; false if timeout occurred.

Exceptions

Type	Condition
ObjectDisposedException	This trigger has been disposed.
OperationCanceledException	The operation has been canceled.
InvalidOperationException	throwOnEmptyQueue is true and no suspended callers in the queue.

SpinWaitAsync<TCondition>(TCondition, CancellationToken)

Suspends the caller until this event is set.

Declaration

public ValueTask SpinWaitAsync<TCondition>(TCondition condition, CancellationToken token = default) where TCondition : ISupplier<bool>

Parameters

Type	Name	Description
TCondition	condition	Additional condition that must be checked before suspension.
CancellationToken	token	The token that can be used to cancel waiting operation.

Returns

Type	Description
ValueTask	true, if this event was set; otherwise, false.

Type Parameters

Name	Description
TCondition	The type of predicate parameter.

Remarks

If given predicate returns true then caller will not be suspended.

Exceptions

Type	Condition
ArgumentNullException	condition is null.
ObjectDisposedException	The current instance has already been disposed.
OperationCanceledException	The operation has been canceled.

SpinWaitAsync<TCondition>(TCondition, TimeSpan, CancellationToken)

Suspends the caller until this event is set.

Declaration

public ValueTask<bool> SpinWaitAsync<TCondition>(TCondition condition, TimeSpan timeout, CancellationToken token = default) where TCondition : ISupplier<bool>

Parameters

Type	Name	Description
TCondition	condition	Additional condition that must be checked before suspension.
TimeSpan	timeout	The number of time to wait before this event is set.
CancellationToken	token	The token that can be used to cancel waiting operation.

Returns

Type	Description
ValueTask<bool>	true, if this event was set; otherwise, false.

Type Parameters

Name	Description
TCondition	The type of predicate parameter.

Remarks

If given predicate returns true then caller will not be suspended.

Exceptions

Type	Condition
ArgumentNullException	condition is null.
ObjectDisposedException	The current instance has already been disposed.
ArgumentOutOfRangeException	timeout is negative.
OperationCanceledException	The operation has been canceled.

WaitAsync(CancellationToken)

Suspends the caller and waits for the signal.

Declaration

public ValueTask WaitAsync(CancellationToken token = default)

Parameters

Type	Name	Description
CancellationToken	token	The token that can be used to cancel the operation.

Returns

Type	Description
ValueTask	The task representing asynchronous execution of this method.

Remarks

This method always suspends the caller.

Exceptions

Type	Condition
ObjectDisposedException	This trigger has been disposed.
OperationCanceledException	The operation has been canceled.

See Also

Signal(bool)

WaitAsync(TimeSpan, CancellationToken)

Suspends the caller and waits for the signal.

Declaration

public ValueTask<bool> WaitAsync(TimeSpan timeout, CancellationToken token = default)

Parameters

Type	Name	Description
TimeSpan	timeout	The time to wait for the signal.
CancellationToken	token	The token that can be used to cancel the operation.

Returns

Type	Description
ValueTask<bool>	true if event is triggered in timely manner; false if timeout occurred.

Remarks

This method always suspends the caller.

Exceptions

Type	Condition
ObjectDisposedException	This trigger has been disposed.
OperationCanceledException	The operation has been canceled.

See Also

Signal(bool)

Implements

IAsyncEvent

IDisposable

IResettable

Extension Methods

BasicExtensions.As<T>(T)

BasicExtensions.GetUserData<T>(T)

BasicExtensions.IsBetween<T, TLowerBound, TUpperBound>(T, TLowerBound, TUpperBound)

BasicExtensions.IsOneOf<T>(T, ReadOnlySpan<T>)

ExpressionBuilder.Const<T>(T)

AsyncLockAcquisition.AcquireLockAsync<T>(T, CancellationToken)

AsyncLockAcquisition.AcquireLockAsync<T>(T, TimeSpan, CancellationToken)

AsyncLockAcquisition.AcquireReadLockAsync<T>(T, CancellationToken)

AsyncLockAcquisition.AcquireReadLockAsync<T>(T, TimeSpan, CancellationToken)

AsyncLockAcquisition.AcquireWriteLockAsync<T>(T, bool, CancellationToken)

AsyncLockAcquisition.AcquireWriteLockAsync<T>(T, bool, TimeSpan, CancellationToken)

AsyncLockAcquisition.AcquireWriteLockAsync<T>(T, CancellationToken)

AsyncLockAcquisition.AcquireWriteLockAsync<T>(T, TimeSpan, CancellationToken)

LockAcquisition.AcquireReadLock<T>(T)

LockAcquisition.AcquireReadLock<T>(T, TimeSpan)

LockAcquisition.AcquireUpgradeableReadLock<T>(T)

LockAcquisition.AcquireUpgradeableReadLock<T>(T, TimeSpan)

LockAcquisition.AcquireWriteLock<T>(T)

LockAcquisition.AcquireWriteLock<T>(T, TimeSpan)