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From "Paulex Yang (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HARMONY-665) [classlib][nio]Charset.encode()/decode() should be more safer for multi thread using
Date Mon, 26 Jun 2006 12:28:31 GMT
     [ http://issues.apache.org/jira/browse/HARMONY-665?page=all ]

Paulex Yang updated HARMONY-665:
--------------------------------

    Attachment: Harmony-665-2.diff

Tim,

I reconsidered it, and now I think you are right that the sync of cache read/write can be
removed, here goes the second patch to do this, please try it, thank you.


> [classlib][nio]Charset.encode()/decode() should be more safer for multi thread using
> ------------------------------------------------------------------------------------
>
>          Key: HARMONY-665
>          URL: http://issues.apache.org/jira/browse/HARMONY-665
>      Project: Harmony
>         Type: Bug

>   Components: Classlib
>     Reporter: Paulex Yang
>     Assignee: Tim Ellison
>  Attachments: Harmony-665-2.diff, Harmony-665.diff
>
> As discussion on the mailing list, current Harmony codes may throw exception for the
scenario below:
>          for (int i = 0; i < THREAD_NUM; i++) {
>               thread[i] = new Thread() {
>                   public void run() {
>                      sink.write(ByteBuffer.wrap("bytes"
>                                         .getBytes(ISO8859_1)));
>                     }
>         }
> String.getBytes() actually invokes Charset.encode(), while spec requires Charset.encode()
to be thread-safe. Current Harmony implementation of Charset.encode() holds lock on this Charset
instance, but doesn't synchronize on the system wide cached CharsetEncoder, so it is not safe
for multi Charset instances in multi threads to encode() concurrently. 

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