June 2012
Intermediate to advanced
528 pages
15h 40m
English
Content preview from Computers as Components, 3rd Edition
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6.4 Preemptive Real-Time Operating Systems
A preemptive real-time operating system (RTOS) solves the fundamental problems of a cooperative multitasking system. It executes processes based upon timing requirements provided by the system designer. The most reliable way to meet timing requirements accurately is to build a preemptive operating system and to use priorities to control what process runs at any given time. We will use these two concepts to build up a basic real-time operating system. We will use as our example operating system FreeRTOS [Bar07]. This operating system runs on many different platforms.
6.4.1 Two Basic Concepts
To make our operating system work, we need to simultaneously introduce two basic concepts. First, we introduce ...
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