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Request the io_service to invoke the given handler.

    typename CompletionHandler>
void-or-deduced dispatch(
    CompletionHandler handler);

This function is used to ask the io_service to execute the given handler.

The io_service guarantees that the handler will only be called in a thread in which the run(), run_one(), poll() or poll_one() 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:

void handler();


This function throws an exception only if:

throws an exception.