Method and system for using a library

• US 20050039196A1
• Filed: 08/13/2003
• Published: 02/17/2005
• Est. Priority Date: 08/13/2003
• Status: Abandoned Application

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Sasidharan, Prasanth Nalini
• Application Number:
  US10/639,676
• Publication Number:
  US 20050039196A1
• Time in Patent Office: Days
• US Class Current: 719/331
• CPC Class Codes: G06F 8/65 Updates security arrangements therefor G06F21/57
• CPC Class Codes: G06F 9/44521 Dynamic linking or loading; Link editing at or after load time, e.g. Java class loading
• CPC Class Codes: G06F 9/44536 Selecting among different versions

Abstract

A method for using a library. More particularly, a method for an application to use a function in a library. An application 1 compares the version 2 of a function 4 in a static form of the library with the version 3 of the function 5 in a dynamic form of the library. The application will use the dynamic function if the comparison indicates that it is more recent than the static function. The method may also be used for data exported from a library. The method may be used to repair defects in a library or to update the library by only making changes to a dynamic form of the library. A system and software for implementing the method are also disclosed.

Claims

1. A method for using a function from a library including the steps of:

i) comparing a version of the function in a static form of the library with a version of the function in a dynamic form of the library;

ii) using the function from the dynamic form of the library when the comparison indicates that the dynamic version is more recent than the static version; and

iii) using the function from the static form of the library when the comparison indicates that the dynamic version is not more recent than the static version.

2. A method as claimed in claim 1 wherein each version is recorded as a version code.

3. A method as claimed in claim 2 wherein the dynamic form of the library is a Dynamic Linked Library (DLL).

4. A method as claimed in claim 2 wherein a different symbol identifies the function in the static form of the library and the dynamic form of the library.

5. A method as claimed in claim 2 wherein the comparison in step (i) occurs during execution of the function from the static form of the library.

6. A method as claimed in claim 2 wherein the comparison in step (i) occurs at substantially the beginning of execution of the function.

7. A method as claimed in claim 2 wherein the static form of the library is archived within the application which is using the function.

8. A method as claimed in claim 2 wherein the function is part of an Application Programming Interface (API).

9. A method as claimed in claim 2 wherein the comparison in step (i) occurs during runtime of the application.

28. A computer system adapted for effecting the method of claim 1.

29. Software for effecting the method of claim 1.

30. Storage media containing the software of claim 29.

10. A method of repairing a defective function in a library, including the steps of:

i) correcting the defect in a function in a dynamic form of the library; and

ii) updating a version code of the corrected function.

11. A method as claimed in claim 10 wherein an application using the function has been compiled with a static form of the library.

12. A method as claimed in claim 11 wherein the static form of the library includes the defective function with an earlier version code.

13. A method as claimed in claim 12 including the step of:

iii) the application comparing the version code of the defective function with the version code of the corrected function; and

iv) the application using the corrected function on the basis of the comparison.

14. A method as claimed in claim 13 wherein the function is part of an Application Programming Interface (API).

15. A method as claimed in claim 13 wherein the comparison in step (i) occurs within the defective function.

16. A method as claimed in claim 13 wherein the dynamic form of the library is a Dynamic Linked Library (DLL).

17. A library for compilation with an application including:

one or more functions adapted to compare a version associated with the function with a version associated with a function in a dynamic library and to execute either the function or the function in the dynamic library on the basis of the comparison.

18. A library as claimed in claim 17 wherein a plurality of functions may be associated with a single version.

19. A library as claimed in claim 17 wherein each version is recorded as a version code.

20. A library as claimed in claim 19 wherein the function is part of an Application Programming Interface (API).

21. A library as claimed in claim 19 wherein the dynamic library is a Dynamic Linked Library (DLL).

22. A system for an application to use a library including:

i) a static library including a plurality of functions, wherein each function is associated with a version;

ii) a dynamic library including a plurality of functions, wherein each function corresponds with a function in the static library and each function is associated with a version; and

iii) an interface adapted to receive requests by an application for use of a function, adapted to compare the version of the static function with the version of the dynamic function, adapted to execute the dynamic function where the version of the dynamic function is later than the version of the static function, and adapted to execute the static function where the version of the dynamic function is not later than the version of the static function.

23. A system as claimed in claim 22 wherein a plurality of functions may be associated with a single version.

24. A system as claimed in claim 22 wherein each version is recorded as a version code.

25. A system as claimed in claim 22 wherein the static library is archived within the application.

26. A system as claimed in claim 22 wherein the interface is incorporated into the static library.

27. A method for using data from a library, including the steps of:

i) comparing a version of the data in a dynamic form of the library with a version of the data in a static form of the library;

ii) using the data from the dynamic form of the library when the comparison indicates that the dynamic version is more recent than the static version; and

iii) using the data from the static form of the library when the comparison indicates that the dynamic version is not more recent than the static version.