pub fn current() -> Task
Returns a handle to the current task to call
notify at a later date.
The returned handle implements the
'static bounds and may also
be cheaply cloned. This is useful for squirreling away the handle into a
location which is then later signaled that a future can make progress.
Implementations of the
Future trait typically use this function if they
would otherwise perform a blocking operation. When something isn't ready
current function is called to acquire a handle to the current
task, and then the future arranges it such that when the blocking operation
otherwise finishes (perhaps in the background) it will
It's sometimes necessary to pass extra information to the task when
unparking it, so that the task knows something about why it was woken.
FutureQueue documentation for details on how to do this.
This function will panic if a task is not currently being executed. That
is, this method can be dangerous to call outside of an implementation of