* under the terms of the license (GNU LGPL) which comes with this package. */
#include "src/mc/explo/udpor/UnfoldingEvent.hpp"
+#include "src/mc/explo/udpor/History.hpp"
+
+#include <xbt/asserts.h>
+#include <xbt/log.h>
+#include <xbt/string.hpp>
namespace simgrid::mc::udpor {
-UnfoldingEvent::UnfoldingEvent(std::shared_ptr<Transition> transition, EventSet immediate_causes,
- unsigned long event_id)
- : associated_transition(std::move(transition)), immediate_causes(std::move(immediate_causes)), event_id(event_id)
+UnfoldingEvent::UnfoldingEvent(std::initializer_list<const UnfoldingEvent*> init_list)
+ : UnfoldingEvent(EventSet(std::move(init_list)))
+{
+}
+
+UnfoldingEvent::UnfoldingEvent(EventSet immediate_causes, std::shared_ptr<Transition> transition)
+ : associated_transition(std::move(transition)), immediate_causes(std::move(immediate_causes))
+{
+ static uint64_t event_id = 0;
+ this->id = ++event_id;
+}
+
+bool UnfoldingEvent::operator==(const UnfoldingEvent& other) const
+{
+ // Intrinsic identity check
+ if (this == &other) {
+ return true;
+ }
+ // Two events are equivalent iff:
+ // 1. they have the same action
+ // 2. they have the same history
+ //
+ // NOTE: All unfolding event objects are created in reference to
+ // an `Unfolding` object which owns them. Hence, the references
+ // they contain to other events in the unfolding can
+ // be used as intrinsic identities (i.e. we don't need to
+ // recursively check if each of our causes has a `==` in
+ // the other event's causes)
+ return associated_transition->aid_ == other.associated_transition->aid_ &&
+ associated_transition->type_ == other.associated_transition->type_ &&
+ associated_transition->times_considered_ == other.associated_transition->times_considered_ &&
+ this->immediate_causes == other.immediate_causes;
+}
+
+std::string UnfoldingEvent::to_string() const
+{
+ std::string dependencies_string;
+
+ dependencies_string += "[";
+ for (const auto* e : immediate_causes) {
+ dependencies_string += " ";
+ dependencies_string += e->to_string();
+ dependencies_string += " and ";
+ }
+ dependencies_string += "]";
+
+ return xbt::string_printf("Event %lu, Actor %ld: %s (%lu dependencies: %s)", this->id, associated_transition->aid_,
+ associated_transition->to_string().c_str(), immediate_causes.size(),
+ dependencies_string.c_str());
+}
+
+EventSet UnfoldingEvent::get_history() const
+{
+ EventSet local_config = get_local_config();
+ local_config.remove(this);
+ return local_config;
+}
+
+EventSet UnfoldingEvent::get_local_config() const
+{
+ return History(this).get_all_events();
+}
+
+bool UnfoldingEvent::related_to(const UnfoldingEvent* other) const
+{
+ return this->in_history_of(other) || other->in_history_of(this);
+}
+
+bool UnfoldingEvent::in_history_of(const UnfoldingEvent* other) const
+{
+ return History(other).contains(this);
+}
+
+bool UnfoldingEvent::conflicts_with(const UnfoldingEvent* other) const
+{
+ // Events that have a causal relation never are in conflict
+ // in an unfolding structure. Two events in conflict must
+ // not be contained in each other's histories
+ if (related_to(other)) {
+ return false;
+ }
+
+ const EventSet my_history = get_local_config();
+ const EventSet other_history = other->get_local_config();
+ const EventSet unique_to_me = my_history.subtracting(other_history);
+ const EventSet unique_to_other = other_history.subtracting(my_history);
+
+ const bool conflicts_with_me = std::any_of(unique_to_me.begin(), unique_to_me.end(),
+ [&](const UnfoldingEvent* e) { return e->is_dependent_with(other); });
+ const bool conflicts_with_other = std::any_of(unique_to_other.begin(), unique_to_other.end(),
+ [&](const UnfoldingEvent* e) { return e->is_dependent_with(this); });
+ return conflicts_with_me || conflicts_with_other;
+}
+
+bool UnfoldingEvent::conflicts_with_any(const EventSet& events) const
+{
+ return std::any_of(events.begin(), events.end(), [&](const auto e) { return e->conflicts_with(this); });
+}
+
+bool UnfoldingEvent::immediately_conflicts_with(const UnfoldingEvent* other) const
+{
+ // They have to be in conflict at a minimum
+ if (not conflicts_with(other)) {
+ return false;
+ }
+
+ auto combined_events = History(EventSet{this, other}).get_all_events();
+
+ // See the definition of immediate conflicts in the original paper on UDPOR
+ combined_events.remove(this);
+ if (not combined_events.is_valid_configuration())
+ return false;
+ combined_events.insert(this);
+
+ combined_events.remove(other);
+ if (not combined_events.is_valid_configuration())
+ return false;
+ combined_events.insert(other);
+
+ return true;
+}
+
+bool UnfoldingEvent::is_dependent_with(const Transition* t) const
{
+ return associated_transition->depends(t);
}
-bool UnfoldingEvent::operator==(const UnfoldingEvent&) const
+bool UnfoldingEvent::is_dependent_with(const UnfoldingEvent* other) const
{
- // TODO: Implement semantic equality
- return false;
+ return is_dependent_with(other->associated_transition.get());
}
} // namespace simgrid::mc::udpor
