Prevent robot from freezing if SmartDashboard freezes

- Partial fix for http://firstforge.wpi.edu/sf/go/artf1719

networktables2/NetworkTableEntry.cpp

@@ -20,6 +20,17 @@ NetworkTableEntry::NetworkTableEntry(EntryId _id, std::string& _name, SequenceNu
 	m_isDirty = false;
 }
 
+NetworkTableEntry::NetworkTableEntry(const NetworkTableEntry &other) :
+	name(other.name),
+	id(other.id),
+	sequenceNumber(other.sequenceNumber),
+	type(other.type),
+	m_isNew(other.m_isNew),
+	m_isDirty(other.m_isDirty)
+{
+	value = type->copyValue(other.value);
+}
+
 NetworkTableEntry::~NetworkTableEntry(){
   type->deleteValue(value);
 }

networktables2/NetworkTableEntry.h

@@ -42,6 +42,7 @@ class NetworkTableEntry {
 	
 	NetworkTableEntry(std::string& name, NetworkTableEntryType* type, EntryValue value);
 	NetworkTableEntry(EntryId id, std::string& name, SequenceNumber sequenceNumber, NetworkTableEntryType* type, EntryValue value);
+	NetworkTableEntry(const NetworkTableEntry &);
 	virtual ~NetworkTableEntry();
 
 	EntryId GetId();

networktables2/WriteManager.cpp

@@ -97,21 +97,35 @@ void WriteManager::run() {
 		entry = ((std::queue<NetworkTableEntry*>*)outgoingAssignmentQueue)->front();
 		((std::queue<NetworkTableEntry*>*)outgoingAssignmentQueue)->pop();
 		{
-			NTSynchronized sync(entryStore.LOCK);
-			entry->MakeClean();
-			wrote = true;
+			NetworkTableEntry * entryCopy;
+
+			{
+				NTSynchronized sync(entryStore.LOCK);
+				entry->MakeClean();
+				wrote = true;
+				entryCopy = new NetworkTableEntry(*entry);
+			}
+
 			receiver.offerOutgoingAssignment(entry);
+			delete entryCopy;
 		}
 	}
 	
 	while(!((std::queue<NetworkTableEntry*>*)outgoingUpdateQueue)->empty()){
 		entry = ((std::queue<NetworkTableEntry*>*)outgoingUpdateQueue)->front();
 		((std::queue<NetworkTableEntry*>*)outgoingUpdateQueue)->pop();
 		{ 
-			NTSynchronized sync(entryStore.LOCK);
-			entry->MakeClean();
-			wrote = true;
+			NetworkTableEntry * entryCopy;
+
+			{
+				NTSynchronized sync(entryStore.LOCK);
+				entry->MakeClean();
+				wrote = true;
+				entryCopy = new NetworkTableEntry(*entry);
+			}
+
 			receiver.offerOutgoingUpdate(entry);
+			delete entryCopy;
 		}
 	}