1 files changed, 6 insertions, 4 deletions
diff --git a/src/deep.h b/src/deep.h
index 5322525..878fa63 100644
--- a/src/deep.h
+++ b/src/deep.h
@@ -16,6 +16,8 @@ extern "C" {
 #include "lanesconf.h"
 #include "uniquekey.h"
+#include <atomic>
 // forwards
 struct Universe;
@@ -38,8 +40,8 @@ using luaG_IdFunction = void*( lua_State* L, DeepOp op_);
 // ################################################################################################
-// fnv164 of string "DEEP_VERSION_2" generated at https://www.pelock.com/products/hash-calculator
+// xxh64 of string "DEEP_VERSION_3" generated at https://www.pelock.com/products/hash-calculator
-static constexpr UniqueKey DEEP_VERSION{ 0xB4B0119C10642B29ull };
+static constexpr UniqueKey DEEP_VERSION{ 0xB2CC0FD9C0AE9674ull };
 // should be used as header for full userdata
 struct DeepPrelude
@@ -48,10 +50,10 @@ struct DeepPrelude
    // when stored in a keeper state, the full userdata doesn't have a metatable, so we need direct access to the idfunc
    luaG_IdFunction* idfunc { nullptr };
    // data is destroyed when refcount is 0
-    volatile int refcount{ 0 };
+    std::atomic<int> m_refcount{ 0 };
 };
-char const* push_deep_proxy( Universe* U, lua_State* L, DeepPrelude* prelude, int nuv_, LookupMode mode_);
+char const* push_deep_proxy(lua_State* L, DeepPrelude* prelude, int nuv_, LookupMode mode_);
 void free_deep_prelude( lua_State* L, DeepPrelude* prelude_);
 LANES_API int luaG_newdeepuserdata( lua_State* L, luaG_IdFunction* idfunc, int nuv_);