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"
16 /* A node in the exploration graph (kind-of) */
17 class XBT_PRIVATE State : public xbt::Extendable<State> {
18 static long expended_states_; /* Count total amount of states, for stats */
20 /* Outgoing transition: what was the last transition that we took to leave this state? */
21 std::unique_ptr<Transition> transition_;
23 /** Sequential state number (used for debugging) */
26 /** State's exploration status by process */
27 std::vector<ActorState> actor_states_;
29 /** Snapshot of system state (if needed) */
30 std::shared_ptr<Snapshot> system_state_;
35 /* Returns a positive number if there is another transition to pick, or -1 if not */
36 int next_transition() const;
38 /* Explore a new path; the parameter must be the result of a previous call to next_transition() */
39 void execute_next(int next);
41 long get_num() const { return num_; }
42 std::size_t count_todo() const;
43 void mark_todo(aid_t actor) { this->actor_states_[actor].mark_todo(); }
44 bool is_done(aid_t actor) const { return this->actor_states_[actor].is_done(); }
45 Transition* get_transition() const;
46 void set_transition(Transition* t) { transition_.reset(t); }
48 Snapshot* get_system_state() const { return system_state_.get(); }
49 void set_system_state(std::shared_ptr<Snapshot> state) { system_state_ = std::move(state); }
51 /* Returns the total amount of states created so far (for statistics) */
52 static long get_expanded_states() { return expended_states_; }
55 } // namespace simgrid