Re: [boost] Boost sprint: #3407 boost::call_once not re-entrant(atleast in win32)

Subject: Re: [boost] Boost sprint: #3407 boost::call_once not re-entrant(atleast in win32)
From: Peter Dimov (pdimov_at_[hidden])
Date: 2009-11-23 10:10:50

Anthony Williams wrote:
> "Peter Dimov" <pdimov_at_[hidden]> writes:
> 
>> Anthony Williams wrote:
>>> Gottlob Frege <gottlobfrege_at_[hidden]> writes:
>>> 
>>>> - if the exception handling and/or recursion handling are
>>>> worthwhile options
>>> 
>>> I don't believe so.
>> 
>> Exceptions need to be handled properly. Recursion does not.
> 
> The current implementation handles exceptions "properly" in the sense
> that if the once function exits with an exception then it is not
> marked as called and another thread (possibly one of those waiting)
> will call it.

Yes, this is the correct behavior.

> The suggestion is to optionally have the function marked as called
> even if an exception is thrown. I don't think this is worthwhile.

I agree.