The Dispatcher

Whenever a Base event occurs, the Base calls the link support code dispatcher function SNALinkDispatchProc to handle the event. The term Base event in this context means:

• A message arriving from a local 2.1 node.
• A Base timer tick occurring—this relatively slow event happens approximately every five seconds.
• Losing contact with a local 2.1 node (for example, the machine being powered down).

The SNALinkDispatchProc function should examine parameters passed to it by the Base to determine why it has been called (see Sample Code for SNALinkDispatchProc) and call an appropriate function to handle the event. When the event has been processed, control returns to the Base scheduler.