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 10:25:32

Gottlob Frege wrote:
> But then complete_once() would imply recursion also, so I decided to 
> separate the concepts.

If you look at local statics for guidance [6.7/4 in N3000]:

"If the initialization exits by throwing an exception, the initialization is 
not complete, so it will be tried again the next time control enters the 
declaration."

"If control re-enters the declaration recursively while the object is being 
initialized, the behavior is undefined."