[webkit-dev] Proposal and WIP implementation for refactoring cross thread communication

[Kwonjin Jeong]

I also thought about what you said. But I'm not sure whether WTF::Function
will be used for cross thread communication only.

So, I'd like to know whether WTF::Function won't be used for single
threaded case.

On Tue, Aug 14, 2012 at 8:57 AM, KwangYul Seo <skyul at company100.net> wrote:

> Currently, there is no code using WTF::Function in single-threaded code.
> It seems WTF::Function is intended to be used for cross thread
> communication. One evidence is that FunctionImplBase is thread-safe
> ref-counted, which is not super efficient for single threaded use cases.
>
> If we have no plan to use WTF::Function for single threaded code, why
> don't we rename WTF::Function to WTF::CrossThreadFunction and add more
> features such as cross thread copying there?
>
> Regards,
> Kwang Yul Seo
>
> On Mon, Aug 13, 2012 at 9:26 PM, Kwonjin Jeong <gram at company100.net>wrote:
>
>> Hi, WebKit.
>>
>> There are several implementations of threads, tasks and cross thread
>> communication. e.g. FileThread, DatabaseThread and StorageThread perform
>> blocking IO asynchronously and invoke callbacks using
>> ScriptExecutionContext. Each of these implementation is pretty similar, but
>> there is no code sharing at all.
>>
>> So, my team at Company 100 is trying to refactor cross thread
>> communication. We wrote an API proposal and modified some thread code to
>> use our new API.
>>
>> As the first step, we added two new abstractions for cross thread
>> communcation:
>>
>> 1) TaskThread is our new abstraction for the task thread. FileThread,
>> DatabaseThread and other task threads reuse the code by inheriting from
>> TaskThread.
>>
>> 2) We also added CrossThreadFunction. It's used to pass a task to the
>> task thread and invoke callbacks. CrossThreadFunction is similar to
>> WTF::Function but it has some additional features. e.g., cross-thread
>> parameter copying and ref counting.
>>
>> Please refer to the following bug for details:
>>
>> https://bugs.webkit.org/show_bug.cgi?id=92365
>>
>> We welcome feedbacks on our work.
>>
>> Thanks.
>>
>> --
>> ====================
>> Kwonjin Jeong
>> Computer Scientist
>> Company 100, Inc.
>> Phone: +82-10-9528-2581
>> ====================
>>
>> _______________________________________________
>> webkit-dev mailing list
>> webkit-dev at lists.webkit.org
>> http://lists.webkit.org/mailman/listinfo/webkit-dev
>>
>>
>


-- 
====================
Kwonjin Jeong
Computer Scientist
Company 100, Inc.
Phone: +82-10-9528-2581
====================
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