#include "src/mc/explo/udpor/Unfolding.hpp"
#include "src/mc/explo/udpor/UnfoldingEvent.hpp"
#include "src/mc/explo/udpor/maximal_subsets_iterator.hpp"
+#include "src/xbt/utils/iter/variable_for_loop.hpp"
#include "xbt/asserts.h"
#include <algorithm>
{
}
-Configuration::Configuration(const UnfoldingEvent* e) : Configuration(e->get_history())
+Configuration::Configuration(const UnfoldingEvent* e) : Configuration(e->get_local_config())
{
// The local configuration should always be a valid configuration. We
// check the invariant regardless as a sanity check
}
+Configuration::Configuration(const History& history) : Configuration(history.get_all_events()) {}
+
Configuration::Configuration(const EventSet& events) : events_(events)
{
- if (!events_.is_valid_configuration()) {
+ if (not events_.is_valid_configuration()) {
throw std::invalid_argument("The events do not form a valid configuration");
}
-}
-Configuration::Configuration(const History& history) : Configuration(history.get_all_events()) {}
+ // Since we add in topological order under `<`, we know that the "most-recent"
+ // transition executed by each actor will appear last
+ for (const UnfoldingEvent* e : get_topologically_sorted_events()) {
+ this->latest_event_mapping[e->get_actor()] = e;
+ }
+}
void Configuration::add_event(const UnfoldingEvent* e)
{
throw std::invalid_argument("Expected a nonnull `UnfoldingEvent*` but received NULL instead");
}
+ // The event is already a member of the configuration: there's
+ // nothing to do in this case
if (this->events_.contains(e)) {
return;
}
// Preserves the property that the configuration is conflict-free
- if (e->conflicts_with(*this)) {
+ if (e->conflicts_with_any(this->events_)) {
throw std::invalid_argument("The newly added event conflicts with the events already "
"contained in the configuration. Adding this event violates "
"the property that a configuration is conflict-free");
}
this->events_.insert(e);
- this->newest_event = e;
+ this->newest_event = e;
+ this->latest_event_mapping[e->get_actor()] = e;
// Preserves the property that the configuration is causally closed
- if (auto history = History(e); !this->events_.contains(history)) {
+ if (auto history = History(e); not this->events_.contains(history)) {
throw std::invalid_argument("The newly added event has dependencies "
"which are missing from this configuration");
}
bool Configuration::is_compatible_with(const UnfoldingEvent* e) const
{
- return not e->conflicts_with(*this);
+ // 1. `e`'s history must be contained in the configuration;
+ // otherwise adding the event would violate the invariant
+ // that a configuration is causally-closed
+ //
+ // 2. `e` itself must not conflict with any events of
+ // the configuration; otherwise adding the event would
+ // violate the invariant that a configuration is conflict-free
+ return contains(e->get_history()) && (not e->conflicts_with_any(this->events_));
}
bool Configuration::is_compatible_with(const History& history) const
{
- return std::none_of(history.begin(), history.end(),
- [&](const UnfoldingEvent* e) { return e->conflicts_with(*this); });
+ // Note: We don't need to check if the `C` will be causally-closed
+ // after adding `history` to it since a) `C` itself is already
+ // causally-closed and b) the history is already causally closed
+ const auto event_diff = history.get_event_diff_with(*this);
+
+ // The events that are contained outside of the configuration
+ // must themselves be free of conflicts.
+ if (not event_diff.is_conflict_free()) {
+ return false;
+ }
+
+ // Now we need only ensure that there are no conflicts
+ // between events of the configuration and the events
+ // that lie outside of the configuration. There is no
+ // need to check if there are conflicts in `C`: we already
+ // know that it's conflict free
+ const auto begin = simgrid::xbt::variable_for_loop<const EventSet>{{event_diff}, {this->events_}};
+ const auto end = simgrid::xbt::variable_for_loop<const EventSet>();
+ return std::none_of(begin, end, [=](const auto event_pair) {
+ const UnfoldingEvent* e1 = *event_pair[0];
+ const UnfoldingEvent* e2 = *event_pair[1];
+ return e1->conflicts_with(e2);
+ });
}
std::vector<const UnfoldingEvent*> Configuration::get_topologically_sorted_events() const
// we know that the prior set `S` covered the entire history of C and
// was maximal. Subsequent sets will miss events earlier in the
// topological ordering that appear in `S`
- EventSet minimally_reproducible_events = EventSet();
+ EventSet minimally_reproducible_events;
for (const auto& maximal_set : maximal_subsets_iterator_wrapper<Configuration>(*this)) {
if (maximal_set.size() > minimally_reproducible_events.size()) {
size_t k) const
{
// 1. Select k (of |D|, whichever is smaller) arbitrary events e_1, ..., e_k from D
- const auto D_hat = [&]() {
- const size_t size = std::min(k, D.size());
- std::vector<const UnfoldingEvent*> D_hat(size);
+ const size_t k_alt_size = std::min(k, D.size());
+ const auto D_hat = [&k_alt_size, &D]() {
+ std::vector<const UnfoldingEvent*> D_hat(k_alt_size);
// TODO: Since any subset suffices for computing `k`-partial alternatives,
// potentially select intelligently here (e.g. perhaps pick events
// with transitions that we know are totally independent). This may be
// UDPOR
//
// For now, simply pick the first `k` events
- std::copy_n(D.begin(), size, D_hat.begin());
+ std::copy_n(D.begin(), k_alt_size, D_hat.begin());
return D_hat;
}();
Comb comb(k);
for (const auto* e : U) {
- for (unsigned i = 0; i < k; i++) {
+ for (size_t i = 0; i < k_alt_size; i++) {
const UnfoldingEvent* e_i = D_hat[i];
if (const auto e_local_config = History(e);
e_i->conflicts_with(e) and (not D.intersects(e_local_config)) and is_compatible_with(e_local_config)) {
return Configuration(History(map_events(*alternative)));
}
+std::optional<const UnfoldingEvent*> Configuration::get_latest_event_of(aid_t aid) const
+{
+ if (const auto latest_event = latest_event_mapping.find(aid); latest_event != latest_event_mapping.end()) {
+ return std::optional<const UnfoldingEvent*>{latest_event->second};
+ }
+ return std::nullopt;
+}
+
+std::optional<const Transition*> Configuration::get_latest_action_of(aid_t aid) const
+{
+ if (const auto latest_event = get_latest_event_of(aid); latest_event.has_value()) {
+ return std::optional<const Transition*>{latest_event.value()->get_transition()};
+ }
+ return std::nullopt;
+}
+
} // namespace simgrid::mc::udpor
