xref: /freebsd/contrib/lutok/c_gate.hpp (revision c697fb7f7cc9bedc5beee44d35b771c4e87b335a)

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/// \file c_gate.hpp
/// Provides direct access to the C state of the Lua wrappers.

#if !defined(LUTOK_C_GATE_HPP)
#define LUTOK_C_GATE_HPP

#include <lua.hpp>

namespace lutok {


class state;


/// Gateway to the raw C state of Lua.
///
/// This class provides a mechanism to muck with the internals of the state
/// wrapper class.  Client code may wish to do so if Lutok is missing some
/// features of the performance of Lutok in a particular situation is not
/// reasonable.
///
/// \warning The use of this class is discouraged.  By using this class, you are
/// entering the world of unsafety.  Anything you do through the objects exposed
/// through this class will not be controlled by RAII patterns not validated in
/// any other way, so you can end up corrupting the Lua state and later get
/// crashes on otherwise perfectly-valid C++ code.
class state_c_gate {
    /// The C++ state that this class wraps.
    state& _state;

public:
    state_c_gate(state&);
    ~state_c_gate(void);

    static state connect(lua_State*);

    lua_State* c_state(void);
};


}  // namespace lutok

#endif  // !defined(LUTOK_C_GATE_HPP)