Callbacks

• A generic way to transfer control to a chare after a library(such as reduction) has finished.

• After finishing a reduction, the results have to be passed to some chare's entry method.

• To do this, create an object of type CkCallback with chare's ID & entry method index

• Different types of callbacks

• One commonly used type:

• CkCallback cb(<chare’s entry method>,<chare’s proxy>);