Generic semaphore for concurrent access by multiple operating systems
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United States of America Patent
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Feb 11, 2003
Grant Date -
N/A
app pub date -
Oct 31, 1996
filing date -
Oct 31, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A generic semaphore supporting semaphore operations from multiple operating systems concurrently. Operating system semaphore invocations are transformed into a generic semaphore API that enables implementation of the semaphores. The generic API enables modification to the semaphore value depending upon the current semaphore value, and enables the queuing of threads to enable waiting upon semaphore operations. The semaphore operations implement synchronization of resource access and synchronization of process or thread execution. The generic semaphore enables applications for specific operating system personalities to execute on a microkernel system without modification of the application semaphore logic. This enables application programmers to code applications using known semaphore operations without regard to their final execution location.
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