1994-12-13
1998-07-21
Kriess, Kevin A.
G06F 940
Patent
active
057846154
ABSTRACT:
An operating system for a computer system having a protection scheme with a plurality of privilege rings provides services for message broadcasting from applications at less privileged rings to virtual drivers at a most privileged ring, and from the virtual drivers to applications. The virtual drivers can perform user mode operations including message broadcasting as an application by synchronizing to a thread of a user mode message server at application time, and setting the thread's user mode context to perform the operations.
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Chen Raymond J.
Lipe Ralph Allen
Ramasubramanian Sankar
Schmidt Michael A.
Courtenay III St. John
Kriess Kevin A.
Microsoft Corporation
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