Move local spike exchange to model

src/communication/communicator.hpp

@@ -92,11 +92,8 @@ public:
     /// events in each queue are all events that must be delivered to targets in that cell
     /// group as a result of the global spike exchange.
     std::vector<event_queue> exchange(const std::vector<spike_type>& local_spikes,
-        std::function<void (const std::vector<spike_type>&)> local_export_callback,
         std::function<void(const std::vector<spike_type>&)> global_export_callback)
     {       
-        local_export_callback(local_spikes);
-
         // global all-to-all to gather a local copy of the global spike list on each node.
         auto global_spikes = communication_policy_.gather_spikes( local_spikes );
         num_spikes_ += global_spikes.size();

src/model.hpp

@@ -167,9 +167,9 @@ public:
             auto exchange = [&] () {
                 PE("stepping", "exchange");
                 auto local_spikes = previous_spikes().gather();
+                exporter_->local_export_callback(local_spikes);
                 future_events() = communicator_.exchange(local_spikes,
                     // send the exporter function as pointers to export
-                    [&](const std::vector<spike_type>& spikes) { exporter_->local_export_callback(spikes); },
                     [&] (const std::vector<spike_type>& spikes){ exporter_->global_export_callback(spikes); });
                 PL(2);
             };