Application program interface to physical devices

Details Application program interface to physical devices Application program interface to physical devices

1998-01-05

2000-06-20

Hafiz, Tariq R.

G06F 945

Patent

active

060787473

ABSTRACT:
In a computer system, a programming interface between application programs and a physical device. The application programs (41, 42) may include executable programs and dynamic-linked libraries. The application program interface of the present invention consists of private data and a library of routines (51) which expose the functionality of the physical device (1). Furthermore, the programming interface is provided in a dynamic-linked library so that the library of routines may be shared between the application programs and utilized by the application programs in conjunction with other such programming interfaces (52, 53) to additional physical devices (2, 3). The library of routines of the programming interface are dynamically bound to the application programs and translate hardware-independent device operations requested by application programs directly into hardware-dependent device operations which do not require the use of a device driver. Therefore, exactly one level of dynamic binding is utilized to provide the programming interface of the present invention. In preferred embodiments of the present invention, two such programming interfaces permit the development of visual programs with deterministic execution and response times in a multi-tasking environment, and which execute at speeds which are significantly faster than visual programs in the prior art.

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