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145 lines
5.2 KiB
ReStructuredText
145 lines
5.2 KiB
ReStructuredText
.. SPDX-License-Identifier: CC-BY-SA-4.0
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.. Copyright (C) 2017, 2019 embedded brains GmbH (http://www.embedded-brains.de)
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.. Copyright (C) 1988, 1998 On-Line Applications Research Corporation (OAR)
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Glossary
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********
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.. glossary::
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:sorted:
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API
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This term is an acronym for Application Programming Interface.
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assembler language
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The assembler language is a programming language which can be translated very
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easily into machine code and data. For this project assembler languages are
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restricted to languages accepted by the :term:`GNU` assembler
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program for the target architectures.
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C language
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The C language for this project is defined in terms of
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:term:`C11`.
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C11
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The standard ISO/IEC 9899:2011.
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CCB
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This term is an acronym for Change Control Board.
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Doorstop
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`Doorstop <https://github.com/doorstop-dev/doorstop>`_ is a
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requirements management tool.
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EARS
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This term is an acronym for Easy Approach to Requirements Syntax.
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ELF
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This term is an acronym for
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`Executable and Linkable Format <https://en.wikipedia.org/wiki/Executable_and_Linkable_Format>`_.
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GCC
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This term is an acronym for `GNU Compiler Collection <https://gcc.gnu.org/>`_.
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GNAT
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*GNAT* is the :term:`GNU` compiler for Ada, integrated into the
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:term:`GCC`.
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GNU
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This term is an acronym for `GNU's Not Unix <https://www.gnu.org/>`_.
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interrupt service
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An *interrupt service* consists of an
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:term:`Interrupt Service Routine` which is called with a user
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provided argument upon reception of an interrupt service request. The
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routine is invoked in interrupt context. Interrupt service requests may have
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a priority and an affinity to a set of processors. An *interrupt service* is
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a :term:`software component`.
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Interrupt Service Routine
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An ISR is invoked by the CPU to process a pending interrupt.
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ISVV
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This term is an acronym for Independent Software Verification and Validation.
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ReqIF
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This term is an acronym for
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`Requirements Interchange Format <https://www.omg.org/spec/ReqIF/About-ReqIF/>`_.
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RTEMS
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This term is an acronym for Real-Time Executive for Multiprocessor Systems.
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software component
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This term is defined by ECSS-E-ST-40C 3.2.28 as a "part of a software
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system". For this project a *software component* shall be any of the
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following items and nothing else:
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* :term:`software unit`
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* explicitly defined :term:`ELF` symbol in a
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:term:`source code` file
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* :term:`assembler language` data in a source code file
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* :term:`C language` object with static storage duration
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* C language object with thread-local storage duration
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* :term:`thread`
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* :term:`interrupt service`
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* collection of *software components* (this is a software architecture
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element)
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Please note that explicitly defined ELF symbols and assembler language
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data are considered a software component only if they are defined in a
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:term:`source code` file. For example, this rules out symbols
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and data generated as side-effects by the toolchain (compiler, assembler,
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linker) such as jump tables, linker trampolines, exception frame information,
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etc.
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software product
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The *software product* is the :term:`RTEMS` real-time operating system.
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software unit
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This term is defined by ECSS-E-ST-40C 3.2.24 as a "separately compilable
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piece of source code". For this project a *software unit* shall be any of
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the following items and nothing else:
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* :term:`assembler language` function in a
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:term:`source code` file
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* :term:`C language` function (external and internal linkage)
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A *software unit* is a :term:`software component`.
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source code
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This project uses the *source code* definition of the
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`Linux Information Project <http://www.linfo.org/source_code.html>`_:
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"Source code (also referred to as source or code) is the version of
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software as it is originally written (i.e., typed into a computer) by a
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human in plain text (i.e., human readable alphanumeric characters)."
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task
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This project uses the
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`thread definition of Wikipedia <https://en.wikipedia.org/wiki/Thread_(computing)>`_:
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"a thread of execution is the smallest sequence of programmed
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instructions that can be managed independently by a scheduler, which is
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typically a part of the operating system."
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It consists normally of a set of registers and a stack. The scheduler
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assigns processors to a subset of the ready tasks. The terms task and
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:term:`thread` are synonym in RTEMS. The term task is used
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throughout the Classic API, however, internally in the operating system
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implementation and the POSIX API the term thread is used.
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A *task* is a :term:`software component`.
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thread
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This term has the same meaning as :term:`task`.
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YAML
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This term is an acronym for `YAML Ain't Markup Language <https://yaml.org/>`_.
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