Re: [boost] [fusion] sequence io manipulators

On 3/26/13 3:12 AM, Jeff Flinn wrote:

When streaming unrelated fusion sets to unrelated ostringstreams from different threads, I get an invalid iterator error. This appears to be due to using a boost::fusion::detail::stream_data::attach's local static arena instance.

static void attach(Stream& stream, T const& data) { static arena ar; // our arena ar.data.push_back(new T(data)); stream.pword(get_xalloc_index<Tag>()) = ar.data.back(); }

I assume there are issues with using the unguarded stream_data::data std::vector from multiple threads. This implementation looks problematic in that the arena data does not get cleaned up until program exit as well.

Right. That code is quite old, IIRC inherited from Boost.Tuples. Would you care to provide a patch? Regards, -- Joel de Guzman http://www.ciere.com http://boost-spirit.com http://www.cycfi.com/