zephyr

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nanokernel: add optional ring buffer data type This patch is based on some code contributed by Dirk Brandewie. This is a generic data structure for queuing data in a FIFO ring buffer. Any given data enqueued is annotated with an app-specific type identifier, and small integral value. Use of a data pointer is optional if the necessary information can be conveyed in the annotations. We want all the metadata to fit in a single DWORD. The ring buffer always contains at least one free dword in the buffer to correctly distinguish between full and empty queues. Concurrency control is almost nonexistent; depending on usage, apps may want to introduce the usage of semaphores and/or mutexes to preserve the integrity of the ring buffer or provide notifications when data is available. Change-Id: I860262d2afc96db4476d4c695a92f7da355ab732 Signed-off-by: Andrew Boie <andrew.p.boie@intel.com> 2015-08-28 04:07:36 +08:00			`[test]`
			`tags = core`