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(Deprecated: Use non-error_code overload.) Run the io_context object's event processing
loop to execute at most one handler.
count_type run_one( boost::system::error_code & ec);
The run_one()
function blocks until one handler has been dispatched, or until the
io_context
has been stopped.
The number of handlers that were executed. A zero return value implies
that the io_context object is stopped
(the stopped()
function returns true).
Subsequent calls to run(), run_one(), poll() or poll_one() will return immediately unless there
is a prior call to restart().
The number of handlers that were executed.
Calling the run_one()
function from a thread that is currently calling one of run(),
run_one(),
run_for(),
run_until(),
poll()
or poll_one()
on the same io_context object may introduce
the potential for deadlock. It is the caller's reponsibility to avoid
this.