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From "Niall Pemberton (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (IO-201) CountingInputStream/CountingOutputStream only partially synchronized
Date Mon, 04 Oct 2010 01:13:32 GMT

     [ https://issues.apache.org/jira/browse/IO-201?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Niall Pemberton resolved IO-201.
--------------------------------

         Assignee: Niall Pemberton
    Fix Version/s: 2.0
                       (was: 2.x)
       Resolution: Fixed

Fixed http://svn.apache.org/viewvc?view=revision&revision=1004079

> CountingInputStream/CountingOutputStream only partially synchronized
> --------------------------------------------------------------------
>
>                 Key: IO-201
>                 URL: https://issues.apache.org/jira/browse/IO-201
>             Project: Commons IO
>          Issue Type: Bug
>          Components: Filters
>    Affects Versions: 1.4
>            Reporter: Sebb
>            Assignee: Niall Pemberton
>             Fix For: 2.0
>
>
> CountingInputStream is only partially synchronized.
> The count is not synchronized when it is updated in read operations, so is not guaranteed
to be published correctly
> The synchronization could be removed without loss of functionality.
> Not sure it makes sense to share a stream between threads anyway, as the underlying stream
is unlikely to be thread-safe.
> If only one thread reads the stream, then the count field could be made volatile.
> This would allow other threads to read the count safely.

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