Add Packer/Unpacker, add serialization to LuaSnap

luprex/core/cpp/luasnap.hpp

@@ -14,6 +14,7 @@
 #ifndef LUASNAP_HPP
 #define LUASNAP_HPP
 
+#include "packer.hpp"
 #include "luastack.hpp"
 
 class LuaSnap {
@@ -29,6 +30,14 @@ public:
     //
     lua_State *state() const { return state_; }
 
+    // Serialize the state of the lua interpreter.
+    //
+    void serialize(Packer *pk);
+    
+    // Restore the the lua interpreter given a serialized state.
+    //
+    void deserialize(Unpacker *unpk);
+
     // Return true if there's a saved snapshot.
     //
     bool have_snapshot() const;
@@ -44,6 +53,7 @@ public:
     // If there is no snapshot, this panics.
     //
     void rollback();
+
 };