internal void OnQueueCompleted()
{
if (this.IsCompleted)
{
// Note this code may execute more than once, as multiple queue completion
// notifications come in.
this.owner.Context.OnJoinableTaskCompleted(this);
foreach (var collection in this.collectionMembership)
{
collection.Remove(this);
}
if (this.mainThreadJobSyncContext != null)
{
this.mainThreadJobSyncContext.OnCompleted();
}
if (this.threadPoolJobSyncContext != null)
{
this.threadPoolJobSyncContext.OnCompleted();
}
this.nestingFactories = default(ListOfOftenOne <JoinableTaskFactory>);
this.initialDelegate = null;
this.state |= JoinableTaskFlags.CompleteFinalized;
}
}
/// <summary>
/// Adds the specified flags to the <see cref="state"/> field.
/// </summary>
private void AddStateFlags(JoinableTaskFlags flags)
{
// Try to avoid taking a lock if the flags are already set appropriately.
if ((this.state & flags) != flags)
{
using (this.Factory.Context.NoMessagePumpSynchronizationContext.Apply())
{
lock (this.owner.Context.SyncContextLock)
{
this.state |= flags;
}
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="JoinableTask"/> class.
/// </summary>
/// <param name="owner">The instance that began the async operation.</param>
/// <param name="synchronouslyBlocking">A value indicating whether the launching thread will synchronously block for this job's completion.</param>
/// <param name="creationOptions">The <see cref="JoinableTaskCreationOptions"/> used to customize the task's behavior.</param>
/// <param name="initialDelegate">The entry method's info for diagnostics.</param>
internal JoinableTask(JoinableTaskFactory owner, bool synchronouslyBlocking, JoinableTaskCreationOptions creationOptions, Delegate initialDelegate)
{
Requires.NotNull(owner, nameof(owner));
this.owner = owner;
if (synchronouslyBlocking)
{
this.state |= JoinableTaskFlags.StartedSynchronously | JoinableTaskFlags.CompletingSynchronously;
}
if (owner.Context.IsOnMainThread)
{
this.state |= JoinableTaskFlags.StartedOnMainThread;
if (synchronouslyBlocking)
{
this.state |= JoinableTaskFlags.SynchronouslyBlockingMainThread;
}
}
this.creationOptions = creationOptions;
this.owner.Context.OnJoinableTaskStarted(this);
this.initialDelegate = initialDelegate;
}
