[Boost-bugs] [Boost C++ Libraries] #9553: destruction of flyweights fails from a module which never creates flyweigths

Subject: [Boost-bugs] [Boost C++ Libraries] #9553: destruction of flyweights fails from a module which never creates flyweigths
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2014-01-08 11:31:58

#9553: destruction of flyweights fails from a module which never creates
flyweigths
------------------------------------+-------------------------
 Reporter:  Axel Habermann <haa@…>  |      Owner:  joaquin
     Type:  Bugs                    |     Status:  new
Milestone:  To Be Determined        |  Component:  flyweight
  Version:  Boost 1.55.0            |   Severity:  Showstopper
 Keywords:                          |
------------------------------------+-------------------------
 Using a factory pattern together with shared_ptr, all flyweight instances
 are created in one dll only.
 Due to shared ownership, they might be destroyed from a dll which never
 creates a single flyweight.
 Because erase does not call core::init(), the module global state for
 flyweight management is never initialized, even when using
 intermodule_holder, leading to a crash when accessed.

 It is not possible
 to provide a minimal example, because the example must consist of
 different modules.

 The following patch fixes the problem:

 {{{
 Index: flyweight/detail/flyweight_core.hpp
 ===================================================================
 --- flyweight/detail/flyweight_core.hpp (revision 462875)
 +++ flyweight/detail/flyweight_core.hpp (revision 462876)
 @@ -65,6 +65,7 @@
    template<typename Checker>
    static void erase(const handle_type& h,Checker chk)
    {
 +    core::init();
      typedef typename core::lock_type lock_type;
      lock_type lock(core::mutex());
      if(chk(h))core::factory().erase(h);

 }}}

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/9553>
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