ceph/src/boost/libs/msm/include/boost/msm/active_state_switching_policies.hpp

   1 // Copyright 2008 Christophe Henry
   2 // henry UNDERSCORE christophe AT hotmail DOT com
   3 // This is an extended version of the state machine available in the boost::mpl library
   4 // Distributed under the same license as the original.
   5 // Copyright for the original version:
   6 // Copyright 2005 David Abrahams and Aleksey Gurtovoy. Distributed
   7 // under the Boost Software License, Version 1.0. (See accompanying
   8 // file LICENSE_1_0.txt or copy at
   9 // http://www.boost.org/LICENSE_1_0.txt)
  10
  11 #ifndef BOOST_MSM_ACTIVE_STATE_SWITCHING_POLICIES_H
  12 #define BOOST_MSM_ACTIVE_STATE_SWITCHING_POLICIES_H
  13
  14 namespace boost { namespace msm
  15 {
  16 // policy classes
  17
  18 // Default: new active state set after the transition (after entry)
  19 struct active_state_switch_after_entry
  20 {
  21     static int after_guard(int current_state,int){return current_state;}
  22     static int after_exit(int current_state,int){return current_state;}
  23     static int after_action(int current_state,int){return current_state;}
  24     static int after_entry(int,int next_state){return next_state;}
  25 };
  26
  27 // new state set before the transition starts
  28 struct active_state_switch_before_transition
  29 {
  30     static int after_guard(int,int next_state){return next_state;}
  31     static int after_exit(int,int next_state){return next_state;}
  32     static int after_action(int,int next_state){return next_state;}
  33     static int after_entry(int,int next_state){return next_state;}
  34 };
  35
  36 // new state set after exit action completed
  37 struct active_state_switch_after_exit
  38 {
  39     static int after_guard(int current_state,int){return current_state;}
  40     static int after_exit(int,int next_state){return next_state;}
  41     static int after_action(int,int next_state){return next_state;}
  42     static int after_entry(int,int next_state){return next_state;}
  43 };
  44
  45 // new state set after transition action completed
  46 struct active_state_switch_after_transition_action
  47 {
  48     static int after_guard(int current_state,int){return current_state;}
  49     static int after_exit(int current_state,int){return current_state;}
  50     static int after_action(int,int next_state){return next_state;}
  51     static int after_entry(int,int next_state){return next_state;}
  52 };
  53
  54 } }//boost::msm
  55 #endif //BOOST_MSM_ACTIVE_STATE_SWITCHING_POLICIES_H