RTEMS 4.9.4 On-Line Library

RTEMS Ada User's Guide

1.5: RTEMS Internal Architecture

RTEMS can be viewed as a set of layered components that work in harmony to provide a set of services to a real-time application system. The executive interface presented to the application is formed by grouping directives into logical sets called resource managers. Functions utilized by multiple managers such as scheduling, dispatching, and object management are provided in the executive core. The executive core depends on a small set of CPU dependent routines. Together these components provide a powerful run time environment that promotes the development of efficient real-time application systems. The following figure illustrates this organization:

Subsequent chapters present a detailed description of the capabilities provided by each of the following RTEMS managers:

• initialization
• task
• interrupt
• clock
• timer
• semaphore
• message
• event
• signal
• partition
• region
• dual ported memory
• I/O
• fatal error
• rate monotonic
• user extensions
• multiprocessing

RTEMS Ada User's Guide

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