Magento: Detect if admin is logged in in frontend pages

Question

I have created a magento extension. I want to implement access to the extension. The extension creates a page in frontend and i want only admin to access that page. So basically

Answer 1

there is a new magento module, written by alan storm: https://github.com/astorm/Magento_CrossAreaSessions

$adminhtml  = Mage::getModel('pulsestorm_crossareasession/manager')->getSessionData('adminhtml');

$adminUser = $dataAdminhtml['admin']['user'];
$loggedIn = $adminUser->getId() && $adminUser->getIsActive();