Wind River Systems, Inc.

Raymond Richardson

Gregory Stults

Maarten Koning

Mark Dapoz

A computer readable storage medium storing a set of instructions executable by a processor. The set of instructions is operable to receive, from a first processor, a message to be sent to a second processor; store the message in a portion of a shared memory, the shared memory being shared by the first processor and the second processor; store, in an instruction list stored in a further portion of the shared memory, an instruction corresponding to the message; and prompt the second processor to read the message list.

Method and system for lockless interprocessor communication

The exemplary embodiments describe systems and methods for utilizing a semaphore with timeout and lock-free path for message passing architectures. One embodiment is related to a method comprising receiving a request from a client to access an object, the object including a plurality of resources, placing the request in a lock-free pend queue of a semaphore, manipulating a count of the semaphore based on an availability of at least one of the plurality of resources, and determining whether the client can use a fast path to the object.

Semaphore with timeout and lock-free fast path for message passing architectures

A method for an acquisition of a semaphore for a thread includes decrementing a semaphore count, storing a current thread context of the semaphore when the semaphore count is less than a first predetermined value, determining a release count of a pending queue associated with the semaphore where the pending queue indicates unpended threads of the semaphore, and adding the thread to the pending queue when the release count is less than a second predetermined value.

Lock free acquisition and release of a semaphore in a multi-core processor environment

A system and method for receiving a request from a requester for access to a computing resource, instructing the requester to wait for access to the resource when the resource is unavailable and allowing the requester to perform other tasks while waiting, determining whether the requester is available when the resource subsequently becomes available, and granting access to the resource by the requester if the requester is available.

Method and system for implementing realtime spinlocks

A method including requesting access to a resource governed by a spinlock; determining an allocation of the resource to a further requester; determining an expiration of a time limit for the spinlock, if the resource is allocated to the further requester; and initiating a fault recovery, if the time limit is expired.

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Richmond, CA, United States of America

Raymond Richardson