The fact that most of the GNAT ports are based on non real-time operating systems leads to a reduced usability for developing real-time systems. Otherwise, existing ports over real-time operating systems are excessively complex, since GNAT uses only a reduced set of their functionality, and with a very specific semantic. This paper describes the implementation of a low-level tasking support for the GNAT run-time. In order to achieve a predictable real-time behaviour we have developed a very simple library, built to fit only the GNAT tasking requirements. We have also designed a bare machine kernel which provides the minimum environment needed by the upper layers.
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Real-time programming with GNAT: specialised kernels versus POSIX threads
de la Puente, Juan A.; Ruiz, José F.; González-Barahona, Jesús M.
Follow ACM SIGAda Ada Letters
, Volume XIX (2)
Association for Computing Machinery – Jun 1, 1999
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