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#ifndef __JIN_COMMON_REFERENCE_H
#define __JIN_COMMON_REFERENCE_H
#include "../luax.h"
namespace JinEngine
{
namespace Lua
{
///
/// This class wraps the reference functionality built into Lua, which allows C++ code to refer to Lua
/// variables.
///
class Reference
{
public:
Reference(lua_State* L, unsigned int i)
: mL(L)
{
luax_pushvalue(mL, i);
mIndex = luax_ref(mL, LUA_REGISTRYINDEX);
}
~Reference()
{
unref();
}
void unref()
{
luax_unref(mL, LUA_REGISTRYINDEX, mIndex);
}
///
/// Push value onto the stack.
///
void push()
{
luax_rawgeti(mL, LUA_REGISTRYINDEX, mIndex);
}
private:
lua_State* const mL;
int mIndex;
};
} // namespace Lua
} // namespace JinEngine
#endif // __JIN_COMMON_REFERENCE_H
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