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Merge pull request #5 from narfunikita/fix-csharp-cscvrptw-example-GC

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Fix csharp cscvrptw example. Protect callbacks from GC.
This commit is contained in:
Mizux
2018-01-20 10:32:04 +01:00
committed by GitHub
parent 85621ab547 507375764d
commit 4e7dfa32d8
1 changed files with 9 additions and 0 deletions
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9
examples/csharp/cscvrptw.cs
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@@ -241,10 +241,12 @@ public class CapacitatedVehicleRoutingProblemWithTimeWindows {
model.AddDimension(demand_callback, 0, vehicle_capacity_, true, "capacity");
// Setting up vehicles
NodeEvaluator2[] cost_callbacks = new NodeEvaluator2[number_of_vehicles];
for (int vehicle = 0; vehicle < number_of_vehicles; ++vehicle) {
int cost_coefficient = vehicle_cost_coefficients_[vehicle];
NodeEvaluator2 manhattan_cost_callback =
new Manhattan(locations_, cost_coefficient);
cost_callbacks[vehicle] = manhattan_cost_callback;
model.SetVehicleCost(vehicle, manhattan_cost_callback);
model.CumulVar(model.End(vehicle), "time").SetMax(
vehicle_end_time_[vehicle]);
@@ -267,6 +269,13 @@ public class CapacitatedVehicleRoutingProblemWithTimeWindows {
Console.WriteLine("Search");
Assignment solution = model.SolveWithParameters(search_parameters);
//protect callbacks from the GC
GC.KeepAlive(manhattan_callback);
GC.KeepAlive(demand_callback);
for (int cost_callback_index = 0; cost_callback_index < cost_callbacks.Length; cost_callback_index++) {
GC.KeepAlive(cost_callbacks[cost_callback_index]);
}
if (solution != null) {
String output = "Total cost: " + solution.ObjectiveValue() + "\n";
// Dropped orders