Plug-in User's Tutorial
Plug-in users instantiate and use the implementations. They need to have a comeplete knowledge of using the plug-in framework. The plug-in users also need to a follow an explicit memory cleanup procedure to ensure the handles held on unused plug-in implementations and their associated DLLs are closed.
Using the Plug-in Framework
Clients of a plug-in framework use the C++ APIs provided by the framework for interaction with the framework. Client calls to the interface definition are translated directly through
into loading and unloading of the correct implementation library together with construction and destruction of an appropriate interface implementation.
To ensure the plug-in framework unloads the plug-in DLLs when they are no longer required and releases associated memory, the clients should follow an explicit memory cleanup procedure. The main purpose is to release memory and close handles held on unused plug-in implementations and their associated DLLs. The memory clean-up should be performed after all instantiated interface objects have been deleted.
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