Don't allow to modify/create/delete an object concurrently

lib/remote/createobjecthandler.cpp

@@ -124,6 +124,9 @@ bool CreateObjectHandler::HandleRequest(
 		return true;
 	}
 
+	// Lock the object name of the given type to prevent from being created concurrently.
+	ObjectNameLock objectNameLock(type, name);
+
 	if (!ConfigObjectUtility::CreateObject(type, name, config, errors, diagnosticInformation)) {
 		result1->Set("errors", errors);
 		result1->Set("code", 500);

lib/remote/deleteobjecthandler.cpp

@@ -84,6 +84,9 @@ bool DeleteObjectHandler::HandleRequest(
 		Array::Ptr errors = new Array();
 		Array::Ptr diagnosticInformation = new Array();
 
+		// Lock the object name of the given type to prevent from being modified/deleted concurrently.
+		ObjectNameLock objectNameLock(type, obj->GetName());
+
 		if (!ConfigObjectUtility::DeleteObject(obj, cascade, errors, diagnosticInformation)) {
 			code = 500;
 			status = "Object could not be deleted.";

lib/remote/modifyobjecthandler.cpp

@@ -112,6 +112,9 @@ bool ModifyObjectHandler::HandleRequest(
 
 		String key;
 
+		// Lock the object name of the given type to prevent from being modified/deleted concurrently.
+		ObjectNameLock objectNameLock(type, obj->GetName());
+
 		try {
 			if (restoreAttrs) {
 				ObjectLock oLock (restoreAttrs);