src/libjin-lua/common/l_reference.cpp


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#include "common/je_lua.h"

#include "l_reference.h"

namespace JinEngine
{
    namespace Lua
    {

        LuaRef::LuaRef(lua_State* L, int i)
            : mL(L)
        {
            // Get value.
            luax_pushvalue(mL, i);
            // Set reference.
            luax_getreferencestable(L);
            luax_pushvalue(mL, -2);
            mIndex = luax_ref(mL, -2);
            luax_pop(L, 3);
        }

        LuaRef::~LuaRef()
        {
            unref();
        }

        void LuaRef::unref()
        {
            luax_getreferencestable(mL);
            luax_unref(mL, -1, mIndex);
            luax_pop(mL, 1);
        }

        void LuaRef::push()
        {
            luax_getreferencestable(mL);
            luax_rawgeti(mL, -1, mIndex);
            luax_remove(mL, -2);
        }

    }
}