Types and Traits for working with asynchronous tasks.
Context of an asynchronous task.
RawWaker allows the implementor of a task executor to create a
which provides customized wakeup behavior.
A virtual function pointer table (vtable) that specifies the behavior
Waker is a handle for waking up a task by notifying its executor that it
is ready to be run.
Indicates whether a value is available or if the current task has been scheduled to receive a wakeup instead.