Re: [Boost-users] Boost msm

Subject: Re: [Boost-users] Boost msm
From: Christophe Henry (christophe.j.henry_at_[hidden])
Date: 2012-03-05 14:34:10

> Yes Precisely,
> Basically my question is how can I tell what was my active state? and how
> can I go back to it directly without having to go through the initial 
> state?
> Thank yoyu

You don't need to go back to it, your state machine does not change state 
until you use it (send it an event). This is called "run-to-completion" in 
UML terminology. Often, people get confused because some libraries are 
actually actively doing something constantly. MSM does not do anything until 
you process an event. Then it moves to a next state, possibly executing some 
entry/exit/transition actions and stays there until a new event is sent. 
This happens entirely inside process_event. At the end of a process_event 
call, MSM does nothing at all.

HTH,
Christophe