INtime® 3.1 Software - tenAsys

INtime 3.1 Software
Figure 4-1. Thread switching in a multithreading environment
Thread A
Thread B
The processor executes thread A.
An event happens and a thread switch occurs. The processor then executes thread B.
When thread B finishes, thread A becomes the running thread again.
Multithreading and modular programming go hand-in-hand. You start by breaking
down a large, difficult application problem into successively smaller and simpler
problems, grouping similar problems where you can. Finally, you solve the small
problems in separate program modules. In the INtime software multithreading
environment, each module is a thread.
Multithreading simplifies building an application. When you need a new function, you
just add a new thread.
When you combine multithreading with preemptive, priority-based scheduling, your
application can switch as appropriate: from relatively unimportant threads, to
important threads, to critical threads, and back again.
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