Refactor code to make it easier to do 'nopredict' inside of any function without having a dependency on world model.

luprex/cpp/core/luastack.hpp

@@ -226,6 +226,13 @@ int LuaTypeTagValue(lua_State *L) { return 0; }
 #define LUA_TT_GLOBALDB      22
 #define LUA_TT_CLASS         23
 
+// World types enum.
+
+enum WorldType {
+    WORLD_TYPE_MASTER = 1,
+    WORLD_TYPE_PREDICTIVE = 2,
+};
+
 // We use lightuserdata to store 'tokens': short
 // strings of 8 characters or less.  These tokens
 // are useful as unique markers.  The 8 characters
@@ -517,6 +524,17 @@ public:
     bool getvisited(LuaSlot tab) const;
     void setvisited(LuaSlot tab, bool visited) const;
 
+    // Return the world type (from the registry).
+    WorldType world_type() const;
+
+    // World types that are authoritative.
+    static bool is_authoritative(WorldType t) { return (t == WORLD_TYPE_MASTER); }
+    bool is_authoritative() { return is_authoritative(world_type()); }
+
+    // Stop execution of this thread if in a nonauth model,
+    // and if the thread is not a probe.
+    void guard_nopredict(const char *fn);
+
     // Return true if the int64 value can be stored as a lua number.
     static bool int64_storable(int64_t v) { return (v <= MAXINT) && (v >= -MAXINT); }
 };