(Deprecated: Use non-error_code overload.) Run the
io_context object's event processing
count_type run( boost::system::error_code & ec);
function blocks until all work has finished and there are no more handlers
to be dispatched, or until the
io_context has been stopped.
Multiple threads may call the
run() function to set up a pool of threads
from which the
io_context may execute handlers.
All threads that are waiting in the pool are equivalent and the
may choose any one of them to invoke a handler.
A normal exit from the
run() function implies that the
io_context object is stopped
Subsequent calls to
poll_one() will return immediately unless there
is a prior call to
Set to indicate what error occurred, if any.
The number of handlers that were executed.
function from a thread that is currently calling one of
on the same
io_context object may introduce
the potential for deadlock. It is the caller's reponsibility to avoid
function may also be used to dispatch ready handlers, but without blocking.