1 /* Copyright (c) 2007-2022. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 #ifndef SIMGRID_MC_STATE_HPP
7 #define SIMGRID_MC_STATE_HPP
9 #include "src/mc/mc_pattern.hpp"
10 #include "src/mc/sosp/Snapshot.hpp"
11 #include "src/mc/transition/Transition.hpp"
13 namespace simgrid::mc {
15 /* A node in the exploration graph (kind-of) */
16 class XBT_PRIVATE State : public xbt::Extendable<State> {
17 static long expended_states_; /* Count total amount of states, for stats */
19 /* Outgoing transition: what was the last transition that we took to leave this state? */
20 std::unique_ptr<Transition> transition_;
22 /** Sequential state ID (used for debugging) */
25 /** State's exploration status by actor. Not all the actors are there, only the ones that are ready-to-run in this state */
26 std::map<aid_t, ActorState> actors_to_run_;
28 /** Snapshot of system state (if needed) */
29 std::shared_ptr<Snapshot> system_state_;
32 explicit State(Session& session);
34 /* Returns a positive number if there is another transition to pick, or -1 if not */
35 aid_t next_transition() const;
37 /* Explore a new path; the parameter must be the result of a previous call to next_transition() */
38 void execute_next(aid_t next);
40 long get_num() const { return num_; }
41 std::size_t count_todo() const;
42 void mark_todo(aid_t actor) { actors_to_run_.at(actor).mark_todo(); }
43 bool is_done(aid_t actor) const { return actors_to_run_.at(actor).is_done(); }
44 Transition* get_transition() const;
45 void set_transition(Transition* t) { transition_.reset(t); }
46 std::map<aid_t, ActorState> const& get_actors_list() { return actors_to_run_; }
48 int get_actor_count() { return actors_to_run_.size(); }
49 bool is_actor_enabled(int actor) { return actors_to_run_.at(actor).is_enabled(); }
51 Snapshot* get_system_state() const { return system_state_.get(); }
52 void set_system_state(std::shared_ptr<Snapshot> state) { system_state_ = std::move(state); }
54 /* Returns the total amount of states created so far (for statistics) */
55 static long get_expanded_states() { return expended_states_; }
57 } // namespace simgrid::mc