Abort route planning if it takes too long

[r2c2.git] / source / libr2c2 / trainrouteplanner.cpp

diff --git a/source/libr2c2/trainrouteplanner.cpp b/source/libr2c2/trainrouteplanner.cpp
index 9bed406f102576c893a6f3b890ad031d36329840..90d769140725fdc00a708a8c55318f6fb2ea12b2 100644 (file)
--- a/source/libr2c2/trainrouteplanner.cpp
+++ b/source/libr2c2/trainrouteplanner.cpp
@@ -1,4 +1,5 @@
 #include <msp/core/maputils.h>
+#include <msp/time/utils.h>
 #include "catalogue.h"
 #include "layout.h"
 #include "route.h"
@@ -15,6 +16,7 @@ namespace R2C2 {
 
 TrainRoutePlanner::TrainRoutePlanner(Layout &layout):
        goal(0),
+       timeout(10*Time::sec),
        result(PENDING),
        thread(0)
 {
@@ -36,6 +38,11 @@ TrainRoutePlanner::~TrainRoutePlanner()
        }
 }
 
+void TrainRoutePlanner::set_timeout(const Time::TimeDelta &t)
+{
+       timeout = t;
+}
+
 TrainRoutePlanner::Result TrainRoutePlanner::plan()
 {
        prepare_plan();
@@ -112,6 +119,8 @@ void TrainRoutePlanner::prepare_plan()
 
 void TrainRoutePlanner::create_plan()
 {
+       Time::TimeStamp timeout_stamp = Time::now()+timeout;
+       unsigned count = 0;
        while(!queue.empty())
        {
                const RoutingStep &step = get_step();
@@ -122,6 +131,13 @@ void TrainRoutePlanner::create_plan()
                }
 
                add_steps(step);
+
+               if(++count>=1000)
+               {
+                       if(Time::now()>timeout_stamp)
+                               break;
+                       count = 0;
+               }
        }
 
        result = FAILED;
@@ -214,7 +230,7 @@ void TrainRoutePlanner::finalize_plan()
 TrainRoutePlanner::TrainRoutingInfo::TrainRoutingInfo(Train &t):
        train(&t),
        speed(train->get_maximum_speed()),
-       first_noncritical(train->get_first_noncritical_block().block()),
+       first_noncritical(train->get_last_critical_block().next().block()),
        router(train->get_ai_of_type<TrainRouter>()),
        waypoints(router ? router->get_n_waypoints() : 0),
        has_duration(false)
@@ -443,9 +459,9 @@ void TrainRoutePlanner::TrainRoutingState::advance_track(unsigned next_path)
 void TrainRoutePlanner::TrainRoutingState::update_estimate()
 {
        TrackIter iter = track.reverse(path);
-       float distance = info->metrics[waypoint]->get_distance_from(*iter.track(), iter.entry());
-       distance += track->get_type().get_path_length(path)-offset;
-       remaining_estimate = distance;
+       remaining_estimate = info->metrics[waypoint]->get_distance_from(*iter.track(), iter.entry());
+       if(remaining_estimate>=0)
+               remaining_estimate += track->get_type().get_path_length(path)-offset;
 }
 
 bool TrainRoutePlanner::TrainRoutingState::is_viable() const