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Error-code and exception-based function dispatch tables

US8935686B2 · US · B2

Patent metadata
FieldValue
Publication numberUS-8935686-B2
Application numberUS-201213596303-A
CountryUS
Kind codeB2
Filing dateAug 28, 2012
Priority dateAug 28, 2012
Publication dateJan 13, 2015
Grant dateJan 13, 2015

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  1. Title

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  2. Abstract

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  3. Assignees and inventors

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  4. Key dates

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  5. First independent claim

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  6. CPC / IPC classifications

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  7. Citations and related patents

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Abstract

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A condition detected by a virtual routine may be treated by setting an error code or raising an exception, depending on circumstances. Enhanced vtable layouts promote availability of both error-ID-based and exception-based virtual routines, while maintaining compatibility. Compilers treat virtual routines based on their circumstances. One enhanced vtable includes error-ID-based routine pointers in a COM-layout-compatible portion and exception-based routine pointers in an extension. For a virtual routine not overridden by a derived class, a compiler generates a direct call. For an object instance of a specific type, the compiler generates a direct exception-based call for the object's routine. For a factory-sourced object's routine, the compiler generates a virtual exception-based call. When the virtual routine belongs to a component having an enhanced vtable, the compiler may generate a virtual call using the exception-based routine pointer. Code wrappers between COM and native format may also be used.

First claim

Opening claim text (preview).

What is claimed is: 1. A computer-readable storage medium configured with data and with instructions that when executed by at least one processor causes the processor(s) to perform a process for compiling a routine of a software program to provide both compatibility support and speed enhancement support, the process comprising the steps of: locating a routine in a source code of the software program, the located routine having a routine body; providing an enhanced virtual table…

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Frequently asked questions

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What does patent US8935686B2 cover?
A condition detected by a virtual routine may be treated by setting an error code or raising an exception, depending on circumstances. Enhanced vtable layouts promote availability of both error-ID-based and exception-based virtual routines, while maintaining compatibility. Compilers treat virtual routines based on their circumstances. One enhanced vtable includes error-ID-based routine pointers…
Who is the assignee on this patent?
Brewis Deon, Springfield James, Madhugiri Sridhar S, and 1 more
What technology area does this patent fall under?
Primary CPC classification G06F11/0718. Mapped technology areas include Physics.
When was this patent published?
Publication date Tue Jan 13 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
What related patents are in patentsdb?
We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).