Task.ContinueWith使用什么SynchronizationContext? [英] What SynchronizationContext does Task.ContinueWith use?
问题描述
Task.ContinueWith 的某些重载不采用SynchronizationContext。他们使用什么SynchronizationContext来计划新任务?
Some overloads of Task.ContinueWith do not take a SynchronizationContext. What SynchronizationContext do they use to schedule the new task?
推荐答案
Task.ContinueWith的一些重载
Some overloads of Task.ContinueWith do not take a SynchronizationContext.
实际上,它们都不使用 SynchronizationContext
,但是有些会使用 TaskScheduler
。
Actually, none of them take a SynchronizationContext
, but some take a TaskScheduler
.
他们使用什么SynchronizationContext来安排新的
What SynchronizationContext do they use to schedule the new task?
没有!默认情况下,继续由当前调度程序( TaskScheduler.Current
)调度,当未从 Task
,是 TaskScheduler.Default
。因此,继续在线程池中的线程上运行。 ThreadPool
线程没有关联的同步上下文(除非您明确设置了同步上下文)。
None! By default, the continuation is scheduled by the current scheduler (TaskScheduler.Current
), which, when not called from a Task
, is TaskScheduler.Default
. So the continuation is run on a thread from the thread pool. ThreadPool
threads don't have an associated synchronization context (unless you explicitly set one).
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