The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 13, 2004
Filed:
Mar. 31, 2000
Applicant:
Inventor:
James A. Sievert, Lino Lakes, MN (US);
Assignee:
Unisys Corporation, Blue Bell, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 9/45 ;
U.S. Cl.
CPC ...
G06F 9/45 ;
Abstract
Methods for converting from a COM interface pointer to an underlying C++ object are described in various embodiments. In the various embodiments, classes are constructed in support of the underlying C++ object. The classes are used to enforce rules safely convert a COM interface pointer. One rule is that a COM interface to be converted cannot be marshaled. A second rule is that an object requesting the C++ object must have legal access to the COM interface (for example, the same execution unit). A third rule is that the object type of the COM interface must be in the inheritance hierarchy of the C++ object.