fixes sync access to patch objects map, avoid access while reconfiguring map

Author: d3cod3

src/ofxVisualProgramming.cpp

@@ -66,6 +66,7 @@ ofxVisualProgramming::ofxVisualProgramming(){
     lastAddedObjectID       = -1;
     bLoadingNewObject       = false;
     bLoadingNewPatch        = false;
+    bPopulatingObjectsMap   = false;
     clearingObjectsMap      = false;
 
     livePatchingObiID       = -1;
@@ -225,7 +226,9 @@ void ofxVisualProgramming::update(){
     }
 
     // Clear map from deleted objects
-    clearObjectsMap();
+    if(!bPopulatingObjectsMap){
+        clearObjectsMap();
+    }
 
     // update patch objects
     if(!bLoadingNewPatch && !patchObjects.empty()){
@@ -1568,6 +1571,8 @@ void ofxVisualProgramming::loadPatch(string patchFile){
             XML.popTag();
         }
 
+        bPopulatingObjectsMap   = true;
+
         int totalObjects = XML.getNumTags("object");
 
         if(totalObjects > 0){
@@ -1645,6 +1650,8 @@ void ofxVisualProgramming::loadPatch(string patchFile){
             }
         }
 
+        bPopulatingObjectsMap   = false;
+
         activateDSP();
 
     }

src/ofxVisualProgramming.h

@@ -153,6 +153,7 @@ class ofxVisualProgramming : public pdsp::Wrapper {
     int                                 lastAddedObjectID;
     bool                                bLoadingNewObject;
     bool                                bLoadingNewPatch;
+    bool                                bPopulatingObjectsMap;
     bool                                clearingObjectsMap;
 
     // LOAD/SAVE