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Re: svn commit: r21016 - in trunk: . subversion/include/private subversion/libsvn_fs_base/bdb subversion/libsvn_subr

From: Philip Martin <philip_at_codematters.co.uk>
Date: 2006-08-10 00:23:40 CEST

Greg Hudson <ghudson@MIT.EDU> writes:

> On Aug 9, 2006, at 5:33 PM, Philip Martin wrote:
>> Will this always be used in places where no parameters need to be
>> passed? How about:
>> svn_error_t *
>> svn_atomic_init_once(volatile svn_atomic_t *global_status,
>> svn_error_t *(*init_func)(void *baton),
>> void *baton);
> Huh. Can you think of a case where it makes sense to pass parameters
> to an atomic initialization function? My intuition is that if you
> want to do that, your designed is subtly wrong.

I suppose that's possible, but I think of the code:

svn_error_t *foo(....)
  SVN_ERR(svn_atomic_init_once(&once, some_func));

as more-or-less equivalent to:

svn_error_t *foo(....)

and it doesn't seem unreasonable to pass arguments to some_func.
Suppose we wanted to use the application's apr_allocator_t when
creating top-level pools in some_func? Using a global variable might
work, but in that case we probably wouldn't need svn_atomic_init_once
in the first place.

Philip Martin
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Received on Thu Aug 10 00:24:15 2006

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