Inter-process signaling system and method
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United States of America Patent
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Jul 14, 2020
Grant Date -
Jan 11, 2018
app pub date -
Sep 27, 2016
filing date -
Jul 6, 2016
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Abstract
An inter-process signaling system and method support implementation of semaphores or messaging signals between masters in a multi-master system, or between tasks in a single master system. A semaphore flag register contains one or more bits indicating whether resources are free or busy. The register is aliased to allow atomic read-and-clear of individual bits in the register. Masters poll the status of a resource until the resource reads as free. Alternatively, interrupts or events per master can be implemented to indicate availability of a resource.
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