Add more fields

Author: tkf

base/Base.jl

@@ -407,11 +407,14 @@ if isdefined(Core, :Compiler) && is_primary_base_module
     Docs.loaddocs(Core.Compiler.CoreDocs.DOCS)
 end
 
-mutable struct AtomicCounter
-    @atomic value::Int
+@eval mutable struct AtomicFields
+    @atomic x1::Int
+    $([:($(Symbol(:x, i))::Int) for i in 2:30]...)
+
+    AtomicFields(x) = new(x)
 end
 
-const ATOMIC_COUNTER = AtomicCounter(0)
+const ATOMIC_FIELDS = AtomicFields(0)
 
 # finally, now make `include` point to the full version
 for m in methods(include)