offset_ptr to volatile int?!

[Lars Hagström <lars@…>]

I'm trying to use a offset_ptr<volatile int> to point to a piece of shared memory that can be changed by another process without other synchronization mechanisms. But I get this kind of errors:

offset_ptr.hpp:116: error: invalid conversion from 'volatile void*'

to 'const void*'

offset_ptr.hpp:116: error: initializing argument 1 of 'void

boost::interprocess::offset_ptr<T>::set_offset(const void*) [with PointedType = volatile int]'

Basically it is not possible to call set_offset when the pointed type is volatile.

[Ion Gaztañaga]

Changed offset_ptr implementation to support volatile values. Added a test checking offset_ptr. SVN revision: 41281