I have two threads using the same polygon.

One thread is modifying the polygon. 

And I want the other thread to use the modified polygon,

so I need to define the polygon as volatile.

However, when I use *(volatile polygon*)&mypolygon,

I get some error as follows:

error: no type named ‘type’ in ‘struct boost::geometry::dimension<volatile boost::geometry::model::polygon<boost::geometry::model::d2::point_xy<double> > >’.

What's wrong with this usage?

Best regards,

Guo Long