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From Regis <xu.re...@gmail.com>
Subject Re: [classlib][luni] BufferedInputStream can not be closed in another thread (HARMONY-6014)
Date Mon, 17 Nov 2008 10:42:32 GMT


Tim Ellison wrote:
> Regis wrote:
>> I just read the spec, it doesn't say the read method is synchronized or
>> thread-safe.
> 
> Agreed.  The class description doesn't say anything about multiple threads.
> 
>> I think BufferedInputStream just need to keep itself status consistent,
>> he never know how is the InputStream implemented, it's better to left
>> synchronous/asynchronous problems handled by the wrapped stream.
> 
> Well at the moment we have the methods on BufferedInputStream marked as
> synchronized.  That will ensure the consistency of the state in the
> buffered stream, and in the wrapped stream.
> 
> Relaxing the sync on close() would pass through the multi-threading
> problems to the wrapped stream, but we still need to ensure the buffered
> stream is consistent, and that is non-trivial too (see my patch on the
> JIRA).
I think The consistency of wrapped stream should be assured by itself, 
BufferedInputStream should be transparent on this. But I tested, that RI 
also synchronized the read method. So if we follow RI, I think the patch 
may be the best solution.

Best Regards,
Regis.

> 
> Regards,
> Tim
> 

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