freebsd-nq/contrib/lutok/c_gate.hpp
Brooks Davis c697fb7f7c Add liblutok a lightweight C++ API for lua.
It is added an INTERNALLIB and not installed.  It will be used by kyua.

This is a preparatory commit for D24103.

Reviewed by:	emaste
Obtained from:	CheriBSD
Sponsored by:	DARPA
2020-03-23 18:26:23 +00:00

72 lines
2.6 KiB
C++

// Copyright 2011 Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of Google Inc. nor the names of its contributors
// may be used to endorse or promote products derived from this software
// without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
/// \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)