Raffine reversible race calculation for MutexWait

[simgrid.git] / src / mc / explo / udpor / Unfolding.cpp

diff --git a/src/mc/explo/udpor/Unfolding.cpp b/src/mc/explo/udpor/Unfolding.cpp
index 68fff485fc65180d38e81cfd5a32ae38de710a30..587d4e93c8c1fe60416147ceb752379840a70288 100644 (file)
--- a/src/mc/explo/udpor/Unfolding.cpp
+++ b/src/mc/explo/udpor/Unfolding.cpp
@@ -9,19 +9,26 @@
 
 namespace simgrid::mc::udpor {
 
-void Unfolding::remove(UnfoldingEvent* e)
+void Unfolding::mark_finished(const EventSet& events)
+{
+  for (const auto* e : events) {
+    mark_finished(e);
+  }
+}
+
+void Unfolding::mark_finished(const UnfoldingEvent* e)
 {
   if (e == nullptr) {
     throw std::invalid_argument("Expected a non-null pointer to an event, but received NULL");
   }
-  this->global_events_.erase(e);
+  this->U.remove(e);
+  this->G.insert(e);
 }
 
-void Unfolding::insert(std::unique_ptr<UnfoldingEvent> e)
+const UnfoldingEvent* Unfolding::insert(std::unique_ptr<UnfoldingEvent> e)
 {
-  UnfoldingEvent* handle = e.get();
-  auto loc               = this->global_events_.find(handle);
-  if (loc == this->global_events_.end()) {
+  const UnfoldingEvent* handle = e.get();
+  if (auto loc = this->global_events_.find(handle); loc != this->global_events_.end()) {
     // This is bad: someone wrapped the raw event address twice
     // in two different unique ptrs and attempted to
     // insert it into the unfolding...
@@ -29,8 +36,42 @@ void Unfolding::insert(std::unique_ptr<UnfoldingEvent> e)
                                 "This will result in a  double free error and must be fixed.");
   }
 
-  // Map the handle to its owner
+  // Attempt to search first for an event in `U`. If it exists, we use that event
+  // instead of `e` since it is semantically equivalent to `e` (i.e. `e` is
+  // effectively already contained in the unfolding)
+  if (auto loc = std::find_if(U.begin(), U.end(), [=](const auto e_i) { return *e_i == *handle; }); loc != U.end()) {
+    // Return the handle to that event and ignore adding in a duplicate event
+    return *loc;
+  }
+
+  // Then look for `e` in `G`. It's possible `e` was already constructed
+  // in the past, in which case we can simply re-use it.
+  //
+  // Note, though, that in this case we must move the event in `G` into
+  // `U`: we've inserted `e` into the unfolding, so we expect it to be in `U`
+  if (auto loc = std::find_if(G.begin(), G.end(), [=](const auto e_i) { return *e_i == *handle; }); loc != G.end()) {
+    const auto* e_equiv = *loc;
+    G.remove(e_equiv);
+    U.insert(e_equiv);
+    return e_equiv;
+  }
+
+  // Otherwise `e` is truly a "new" event
+  this->U.insert(handle);
+  this->event_handles.insert(handle);
   this->global_events_[handle] = std::move(e);
+  return handle;
+}
+
+EventSet Unfolding::get_immediate_conflicts_of(const UnfoldingEvent* e) const
+{
+  EventSet immediate_conflicts;
+  for (const auto* event : U) {
+    if (event->immediately_conflicts_with(e)) {
+      immediate_conflicts.insert(event);
+    }
+  }
+  return immediate_conflicts;
 }
 
 } // namespace simgrid::mc::udpor