Using a C/C++ external in an Eiffel system is pretty easy. Simply do a C/C++ inline and provide the arguments to the C/C++ externals.

When transforming the same system into a multithreaded application one has to pay attention to something else: C/C++ externals that may take a long time to execute.

Using blocking qualifier

Sometimes in an application, some actions have to be repeatedly performed in a certain interval. This could for example be some cleanup of external data. To do this I wrote a small class that takes an agent and an interval. <eiffel> indexing description: "Execute an action every interval until stopped." author: "Patrick Ruckstuhl <patrick@tario.org>" date: "$Date$"