Changes in src/World.cpp [23b547:a77c96]

File:

• src/World.cpp (modified) (3 diffs)

src/World.cpp

@@ -16 +16 @@
 #include "Descriptors/MoleculeDescriptor_impl.hpp"
 #include "Actions/ManipulateAtomsProcess.hpp"
-
-#include "Patterns/Singleton_impl.hpp"
 
 using namespace std;
@@ -231 +229 @@
 /******************************* Singleton Stuff **************************/
 
+// TODO: Hide boost-thread using Autotools stuff when no threads are used
+World* World::theWorld = 0;
+boost::mutex World::worldLock;
+
 World::World() :
     periode(new periodentafel),
@@ -259 +261 @@
 }
 
-// Explicit instantiation of the singleton mechanism at this point
-
-CONSTRUCT_SINGLETON(World)
+World* World::get(){
+  // boost supports RAII-Style locking, so we don't need to unlock
+  boost::mutex::scoped_lock guard(worldLock);
+  if(!theWorld) {
+    theWorld = new World();
+  }
+  return theWorld;
+}
+
+void World::destroy(){
+  // boost supports RAII-Style locking, so we don't need to unlock
+  boost::mutex::scoped_lock guard(worldLock);
+  delete theWorld;
+  theWorld = 0;
+}
+
+World* World::reset(){
+  World* oldWorld = 0;
+  {
+    // boost supports RAII-Style locking, so we don't need to unlock
+    boost::mutex::scoped_lock guard(worldLock);
+
+    oldWorld = theWorld;
+    theWorld = new World();
+    // oldworld does not need protection any more,
+    // since we should have the only reference
+
+    // worldLock handles access to the pointer,
+    // not to the object
+  } // scope-end releases the lock
+
+  // we have to let all the observers know that the
+  // oldWorld was destroyed. oldWorld calls subjectKilled
+  // upon destruction. Every Observer getting that signal
+  // should see that it gets the updated new world
+  delete oldWorld;
+  return theWorld;
+}
 
 /******************************* deprecated Legacy Stuff ***********************/