[Bug 27955] New: share an immutable object between threads

https://www.w3.org/Bugs/Public/show_bug.cgi?id=27955

            Bug ID: 27955
           Summary: share an immutable object between threads
           Product: HTML WG
           Version: unspecified
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: HTML5 spec
          Assignee: dave.null@w3.org
          Reporter: charlie651@gmail.com
        QA Contact: public-html-bugzilla@w3.org
                CC: mike@w3.org, public-html-admin@w3.org,
                    public-html-wg-issue-tracking@w3.org

"The steps will return a new object of the same type, and will permanently
neuter the original object. "

It would be nice to have a way to make an arraybuffer available for reading
both to a worker thread and to the main thread for reading without duplicating
it in memory.

Sending it as a message will duplicate it, and transferring it will neuter it
making it unavailable to the main thread.

If we can make the ArrayBuffer read only, we should be able to share it between
the worker and code in the main thread while preserving thread safety.

Maybe a syntax like worker.postMessage(message, [transfers], [shares])?

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Received on Wednesday, 4 February 2015 07:10:44 UTC