[Webkit-unassigned] [Bug 39893] Explicitly use PTHREAD_MUTEX_NORMAL to create pthread mutex
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Mon May 31 09:56:50 PDT 2010
https://bugs.webkit.org/show_bug.cgi?id=39893
Darin Adler <darin at apple.com> changed:
What |Removed |Added
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CC| |darin at apple.com
--- Comment #15 from Darin Adler <darin at apple.com> 2010-05-31 09:56:49 PST ---
(In reply to comment #13)
> (In reply to comment #12)
> > > + // Make sure it's not the same value as PTHREAD_MUTEX_INITIALIZER.
> > This comment makes no sense. Why is it important to make sure that something is not the same value as PTHREAD_MUTEX_INITIALIZER? How is that relevant at all?
>
> pthread_mutex_init and pthread_mutex_destroy are not supposed to be called on PTHREAD_MUTEX_INITIALIZER. I cannot find any scription that defines the behavior. So I assume the behavior is undefined, and up to implementation.
I think you're misunderstanding this. I read over the various documentation, and yes, it's true that you should not use both PTHREAD_MUTEXT_INITIALIZER and pthread_mutex_init on the same mutex, but that does not mean that you have to pre-initialize the mutex before calling pthread_mutex_init. It just means that it's a programming mistake to both use PTHREAD_MUTEXT_INITIALIZER and pthread_mutex_init.
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