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Section 8.13: Operating System Classes |
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This section of the required library contains definitions of those
abstractions which describe the required interface between the reuired library
and an execution environment operating system. No implementation classes are
defined.
Abstract Classes
- $EXTERNAL_REF - this abstraction
should be inherited by any class which provides operating system
reference values.
- $OPERATING_SYS - this specifies
the operating system services in communicating with the execution
environment.
- $OPSYS_TIME - this is the interface
to the operating system real time of day clock.
- $OPSYS_TIME_USAGE - this
specifies those statistics which an operating system is to provide for
use in evaluating program run time clock values.
- $OPSYS_TIMERS - this specifies the
clocks/timers which should be available to the required library.
- $OPSYS_TIMER - a high resolution
clock timer.
- $OPSYS_FILE_LABEL - this class
indicates the minimum list of file label components used by the
required library.
- $OPSYS_FILE_SYS - this class
provides the specification of all file/directory services.
Comments
or enquiries should be made to Keith Hopper.
Page last modified: Friday, 10 March 2000.
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