Reset: Terrasync root can change, can be shutdown.

simgear/scene/tsync/terrasync.cxx

@@ -755,11 +755,10 @@ void SGTerraSync::SvnThread::writeCompletedTilesPersistentCache() const
 ///////////////////////////////////////////////////////////////////////////////
 // SGTerraSync ////////////////////////////////////////////////////////////////
 ///////////////////////////////////////////////////////////////////////////////
-SGTerraSync::SGTerraSync(SGPropertyNode_ptr root) :
+SGTerraSync::SGTerraSync() :
     _svnThread(NULL),
     last_lat(NOWHERE),
     last_lon(NOWHERE),
-    _terraRoot(root->getNode("/sim/terrasync",true)),
     _bound(false),
     _inited(false)
 {
@@ -772,11 +771,16 @@ SGTerraSync::SGTerraSync(SGPropertyNode_ptr root) :
 
 SGTerraSync::~SGTerraSync()
 {
-    _tiedProperties.Untie();
     delete _svnThread;
     _svnThread = NULL;
     sglog().removeCallback(_log);
     delete _log;
+     _tiedProperties.Untie();
+}
+
+void SGTerraSync::setRoot(SGPropertyNode_ptr root)
+{
+    _terraRoot = root->getNode("/sim/terrasync",true);
 }
 
 void SGTerraSync::init()
@@ -786,11 +790,18 @@ void SGTerraSync::init()
     }
     
     _inited = true;
+    
+    assert(_terraRoot);
     _terraRoot->setBoolValue("built-in-svn-available",svn_built_in_available);
         
     reinit();
 }
 
+void SGTerraSync::shutdown()
+{
+     _svnThread->stop();
+}
+
 void SGTerraSync::reinit()
 {
     // do not reinit when enabled and we're already up and running

simgear/scene/tsync/terrasync.hxx

@@ -40,10 +40,11 @@ class SGTerraSync : public SGSubsystem
 {
 public:
 
-    SGTerraSync(SGPropertyNode_ptr root);
+    SGTerraSync();
     virtual ~SGTerraSync();
     
     virtual void init();    
+    virtual void shutdown();
     virtual void reinit();
     virtual void bind();
     virtual void unbind();
@@ -59,6 +60,8 @@ public:
     
     bool scheduleTile(const SGBucket& bucket);
     
+    void setRoot(SGPropertyNode_ptr root);
+
     /// retrive the associated log object, for displaying log
     /// output somewhere (a UI, presumably)
     BufferedLogCallback* log() const