Abstract: A method for providing a secure lockout from executing application programs is provided. An opaque graphical component obscures graphical components for all executing software (applications) programs on a display apparatus and prevents events from reaching the executing application programs.

Abstract: Store for operating system resource data is provided integrally with application program resource data in an application program environment to create a shared object. Application programs executing the in application program environment are prevented from accessing the operating system resource data portion of the shared object.

Abstract: An application programming language runtime environment is integrated with an operating system kernel. The resulting merged data structures, meta-data structures and access methods contain the consolidation of information needed by the application programming language runtime and the operating system, without duplication. Integrating resources of the application programming language runtime and the operating system reduces the overall memory needed to store the merges data structures and meta data structures. Additionally, overhead in maintaining multiple data structures in parallel is also reduced, thus reducing the processing required. The integrated application programming language runtime and operating system kernel environment can also sharing semantic behavior such that untrusted application program code is prevented from escaping the application programming language runtime environment.

Abstract: A garbage collector, from time to time, and within a single cycle, determines objects that are eligible to have their associated memory freed; executes high-priority finalizers associated with such eligible objects as are determined; and after execution of a high-priority finalizer, deallocates the memory of the associated object. The garbage collector queues references to eligible objects that have non-high-priority finalizers in a list. After garbage collection is completed, a finalizer thread runs the queued non-high-priority finalizers and marks the associated objects as ready for deallocation. The garbage collector, during a subsequent cycle, then deallocates the memory associated with marked objects.

Abstract: The invention method and system provides rotation of an image on a display screen. A graphics library translates on-screen coordinates from a base viewing mode to a desired alternate viewing mode. The translated coordinated are rendered directly to the display screen.

Abstract: Memory and processing required for managing virtual memory segments is reduced by overloading the existing page table entries in a virtual memory page table to encode virtual memory segmentation data. Therefore, no additional data structures are required for virtual memory segment management. Virtual memory segmentation information is stored in the actual page table entries, using bits that are reserved as unused for the given computer architecture to identify the virtual memory segment management information.

Abstract: A graphics sub-system manages a two-dimensional coordinate space which includes a plurality of rectangular regions. The two-dimensional coordinate space is represented by a hierarchical linked list of nodes. Each node represents a rectangular region of two-dimensional coordinate space. Each node acts as a bounding box for all descendant nodes in the hierarchical linked list of nodes.