Boost logo

Boost :

Subject: Re: [boost] [any] new version
From: Martin Bidlingmaier (Martin.Bidlingmaier_at_[hidden])
Date: 2011-09-02 14:58:13

So there are actually two main issues that need to be taken care of:

- 1. dlls
  I think a good solution would be to add a new class, e.g. as
  Andrey Semashev proposed 'local_any', that derives from the current
  version of any.
  The normal version could be used for inter dll passing, the new version
  when the user can assure that a local_any instance won't be passed between
  Conversion could be provided from local_any to any.

- 2. thread safety
  In c++03, variables defined at namespace scope are not necessarily
  initialized before main(), so there could be data races for the
  previous_id in next_id() in multi threaded applications.
  One simple way out would be to lock the variabe when used, but this would
  add the dependency on a threading library (does boost provide
  locking header only or does it need building?).
  It would be interesting to know, what c++11 says about the initialization
  of static data members. If it prohibits more than one initialization at a
  time or requires single threaded initialization before main() ,
  locking will not be needed.

Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir
belohnen Sie mit bis zu 50,- Euro!

Boost list run by bdawes at, gregod at, cpdaniel at, john at