Library and Services

From EDM2
Jump to: navigation, search
Storage Device Driver Reference
  1. About This Book
  2. Introduction to DASD, SCSI, and CD-ROM Programming Interfaces
  3. Installation of OS/2, DASD, SCSI, and CD-ROM Device Drivers
  4. Adapter Device Driver Development Considerations
  5. DASD, SCSI, and CD-ROM Device Manager Interface Specification
  6. Error Handling
  7. Adapter Device Driver Command-Line Parameters
  8. DASD IOCtl Device Driver Test Tool
  9. Optical IOCtl Device Driver Test Tool
  10. Using Filter Device Drivers
  11. Library and Services
  12. CD-ROM Device Manager Interface Specification
  13. CD-ROM Device Driver Test Tool
  14. Building an OS/2 Virtual Disk Driver
  15. OS2DASD.DMD - Technical Reference
  16. Boot Record Architecture
  17. Extended Device Driver Interface Specification
  18. I/O Request Block - C Definitions
  19. OS/2 SCSI Device Driver Interface Specification
  20. Advanced SCSI Programming Interface (ASPI) OS/2 Specification
  21. Adapter Device Driver Interface Questions and Answers
  22. Device Driver Test Tool (DDTT)
  23. Glossary

Reprint Courtesy of International Business Machines Corporation, © International Business Machines Corporation

A complement of library services for common adapter device driver tasks is provided in the IBM Device Driver Source Kit for OS/2. This adapter device driver library includes a set of functions that can be statically linked with an adapter device driver at build time.

These library services are provided in both source and object form. This code is in the \addcalls and \devhelp subdirectories of the \src tree. You can modify and extend this code to suit your needs.

The DevHlp services are provided with FAR code and data-calling convention support. Adapter Device Driver Calls services are generally provided with both FAR and NEAR calling-convention support.

The library services include the following:

  • 'C' interface to the DevHlp kernel services
  • Timer services
  • Scatter/gather buffer transfers
  • RBA <-> CHS computations
  • DMA setup and channel control, ISA bus machines
  • Command line parsing

See the headers of the individual functions for a detailed description of function services and their calling conventions.

Command-Line Parsing

To facilitate parsing of command-line parameters and to help encourage uniformity in command-line syntax, a parser/tokenizer is provided in the IBM Device Driver Source Kit for OS/2. See Adapter Device Driver Command-Line Parameters for a command-line syntax definition.

The output of the parser/tokenizer is a stream of tokens that represent the contents of the command line. The parser/tokenizer performs preliminary syntactical checks on the command line and indicates the results of these checks in return codes.

As with the other library services provided in the IBM Device Driver Source Kit for OS/2, you can modify the parser and its included tables to add adapter-unique flags and parameters.