Registration, Startup, & Shutdown

Each module must provide registration, startup, and shutdown functions that will be called automatically.

The registration function is module_name_module_registration and should contain all of the module's registration calls.

The startup function is module_name_module_startup. All of the module registration functions are called before any of the startup functions, so at startup all of the registrations from other modules will be visible.

The shutdown function is module_name_module_shutdown. The shutdown function of each module is called just prior to the device powering down.