Merge branch 'master' of https://github.com/Limvot/kraken

stdlib/mem.krak

@@ -128,4 +128,67 @@ fun safe_recursive_clone<T>(first: *T, cloningFunc: fun(*T, fun(*T):*T, fun(*T):
     return rec_it(first)
 }
 
+obj shared_ptr<T> (Object){
+  var data: *T;
+  var refCount: int;
+
+  fun construct(): *shared_ptr<T> {
+    data = 0;
+    refCount = 1;
+    return this;
+  }
+  
+  fun construct(newPtr: *T): *shared_ptr<T> {
+    data = newPtr;
+    refCount = 1;
+    return this;
+  }
+  
+  fun construct(newPtr: ref shared_ptr<T>): *shared_ptr<T> {
+    data = newPtr.data;
+    refCount = newPtr.refCount;
+    refCount++;
+    return this;
+  }
+  
+  fun destruct(): void {
+    if(refCount == 1){
+      delete(data,1);
+      refCount--;
+    }
+
+  }
+  
+  fun operator*(): ref T {
+    return *data;
+  }
+  
+  fun operator->(): *T {
+    return data;
+  }
+
+  fun operator=(newPtr: ref shared_ptr<T>): ref shared_ptr<T> {
+    if(this != &newPtr){
+      if(refCount == 1){
+        delete(data,1);
+        refCount--;
+      }
+      //use copy constructor here???
+      data = newPtr.data;
+      refCount = newPtr.refCount;
+      refCount++;
+    }//end self-assignment check
+    return *this; 
+  }
+  
+  fun operator=(newPtr: ref *T): ref shared_ptr<T> {
+      data = newPtr;
+      refCount = 1;
+      delete(newPtr,1);
+    return *this; 
+  }
+
+}; //end shared_ptr class
+
+