core.atomic: atomicFence, atomicLoad, atomicStore

[ref2401 via Digitalmars-d-learn]

Thanks for the links.

I have shared class instance. There are two threads which can 
read/write fields of the class. As i understand i can declare 
class as synchronized or i can read/write using 
atomicLoad/atomicStore.
What's the difference between these two approaches?
In what circumstances should i consider synchronized classes or 
using std.atomic?