template< typename CompletionHandler> void-or-deduced dispatch( CompletionHandler && handler);
This function is used to ask the
io_service to execute the given
guarantees that the handler will only be called in a thread in which the
member functions is currently being invoked. The handler may be executed
inside this function if the guarantee can be met.
The handler to be called. The
io_service will make a copy
of the handler object as required. The function signature of the
handler must be:
This function throws an exception only if:
throws an exception.