1 /* Copyright (c) 2008-2023. 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 #include "src/mc/explo/udpor/UnfoldingEvent.hpp"
7 #include "src/mc/explo/udpor/History.hpp"
9 #include <xbt/asserts.h>
11 #include <xbt/string.hpp>
13 namespace simgrid::mc::udpor {
15 UnfoldingEvent::UnfoldingEvent(std::initializer_list<const UnfoldingEvent*> init_list)
16 : UnfoldingEvent(EventSet(std::move(init_list)))
20 UnfoldingEvent::UnfoldingEvent(EventSet immediate_causes, std::shared_ptr<Transition> transition)
21 : associated_transition(std::move(transition)), immediate_causes(std::move(immediate_causes))
23 static uint64_t event_id = 0;
24 this->id = ++event_id;
27 bool UnfoldingEvent::operator==(const UnfoldingEvent& other) const
29 // Intrinsic identity check
33 // Two events are equivalent iff:
34 // 1. they have the same action
35 // 2. they have the same history
37 // NOTE: All unfolding event objects are created in reference to
38 // an `Unfolding` object which owns them. Hence, the references
39 // they contain to other events in the unfolding can
40 // be used as intrinsic identities (i.e. we don't need to
41 // recursively check if each of our causes has a `==` in
42 // the other event's causes)
43 return associated_transition->aid_ == other.associated_transition->aid_ &&
44 associated_transition->type_ == other.associated_transition->type_ &&
45 associated_transition->times_considered_ == other.associated_transition->times_considered_ &&
46 this->immediate_causes == other.immediate_causes;
49 std::string UnfoldingEvent::to_string() const
51 std::string dependencies_string;
53 dependencies_string += "[";
54 for (const auto* e : immediate_causes) {
55 dependencies_string += " ";
56 dependencies_string += e->to_string();
57 dependencies_string += " and ";
59 dependencies_string += "]";
61 return xbt::string_printf("Event %lu, Actor %ld: %s (%lu dependencies: %s)", this->id, associated_transition->aid_,
62 associated_transition->to_string().c_str(),
63 static_cast<long unsigned>(immediate_causes.size()), dependencies_string.c_str());
66 EventSet UnfoldingEvent::get_history() const
68 EventSet local_config = get_local_config();
69 local_config.remove(this);
73 EventSet UnfoldingEvent::get_local_config() const
75 return History(this).get_all_events();
78 bool UnfoldingEvent::related_to(const UnfoldingEvent* other) const
80 return this->in_history_of(other) || other->in_history_of(this);
83 bool UnfoldingEvent::in_history_of(const UnfoldingEvent* other) const
85 return History(other).contains(this);
88 bool UnfoldingEvent::conflicts_with(const UnfoldingEvent* other) const
90 // Events that have a causal relation never are in conflict
91 // in an unfolding structure. Two events in conflict must
92 // not be contained in each other's histories
93 if (related_to(other)) {
97 const EventSet my_history = get_local_config();
98 const EventSet other_history = other->get_local_config();
99 const EventSet unique_to_me = my_history.subtracting(other_history);
100 const EventSet unique_to_other = other_history.subtracting(my_history);
102 const bool conflicts_with_me = std::any_of(unique_to_me.begin(), unique_to_me.end(),
103 [&](const UnfoldingEvent* e) { return e->is_dependent_with(other); });
104 const bool conflicts_with_other = std::any_of(unique_to_other.begin(), unique_to_other.end(),
105 [&](const UnfoldingEvent* e) { return e->is_dependent_with(this); });
106 return conflicts_with_me || conflicts_with_other;
109 bool UnfoldingEvent::conflicts_with_any(const EventSet& events) const
111 return std::any_of(events.begin(), events.end(), [&](const auto e) { return e->conflicts_with(this); });
114 bool UnfoldingEvent::immediately_conflicts_with(const UnfoldingEvent* other) const
116 // They have to be in conflict at a minimum
117 if (not conflicts_with(other)) {
121 auto combined_events = History(EventSet{this, other}).get_all_events();
123 // See the definition of immediate conflicts in the original paper on UDPOR
124 combined_events.remove(this);
125 if (not combined_events.is_valid_configuration())
127 combined_events.insert(this);
129 combined_events.remove(other);
130 if (not combined_events.is_valid_configuration())
132 combined_events.insert(other);
137 bool UnfoldingEvent::is_dependent_with(const Transition* t) const
139 return associated_transition->depends(t);
142 bool UnfoldingEvent::is_dependent_with(const UnfoldingEvent* other) const
144 return is_dependent_with(other->associated_transition.get());
147 } // namespace simgrid::mc::udpor