What types of control transfer methods are encountered in dispatching systems?

In dispatching systems (for example, in operating systems or frameworks), there are different types of control transfer methods that determine how and when control is passed between tasks or threads:

1. Direct call — control is transferred directly to the called function or task.

2. Interrupt — an asynchronous transfer of control, where hardware or software events interrupt the current process and transfer control to a handler.

3. Scheduling — the dispatcher decides which process or thread gains control at a given moment, based on priorities and task states.

4. Message passing — tasks exchange messages, and control is transferred during message processing.

5. Callbacks and event handlers — control is transferred to callback functions when a specific event occurs.

Each of these methods is used depending on the system architecture and requirements for thread and task management.