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From: David Abrahams (dave_at_[hidden])
Date: 2007-08-22 10:42:52

on Wed Aug 22 2007, Howard Hinnant <> wrote:

>> "However if the external mutex is (or is layout compatible with) a
>> pthread_mutex_t, then there is no need for the internal
>> pthread_mutex_t. When one wants to wait, one simply waits on the
>> external pthread_mutex_t with the internal pthread_cond_t."
>> This smells a little fishy. It seems to imply that pthreads can wait
>> on any old data type that happens to be layout-compatible with
>> pthread_mutex_t. Is that really true?
> Perhaps the wording isn't precise enough.
> The intent is that on pthreads:

<snip explanation that doesn't mention layout-compatibility>

Sure. But where does the layout-compatibility thing come in? Your
example uses the native pthread types, not arbitrary types
layout-compatible with those.

Dave Abrahams
Boost Consulting
The Astoria Seminar ==>

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