Function runWorkerTaskDistH
Runs a new asynchronous task in all worker threads and returns the handles.
void runWorkerTaskDistH(HCB, FT, ARGS...)
(
scope HCB on_handle,
FT func,
auto ref ARGS args
)
if (is(typeof(*func) == function));
on_handle is a callble that takes a Task as its only argument and is
called for every task instance that gets created.