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      1 // Copyright 2011 Google Inc.
      2 // All rights reserved.
      3 //
      4 // Redistribution and use in source and binary forms, with or without
      5 // modification, are permitted provided that the following conditions are
      6 // met:
      7 //
      8 // * Redistributions of source code must retain the above copyright
      9 //   notice, this list of conditions and the following disclaimer.
     10 // * Redistributions in binary form must reproduce the above copyright
     11 //   notice, this list of conditions and the following disclaimer in the
     12 //   documentation and/or other materials provided with the distribution.
     13 // * Neither the name of Google Inc. nor the names of its contributors
     14 //   may be used to endorse or promote products derived from this software
     15 //   without specific prior written permission.
     16 //
     17 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     18 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     19 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     20 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     21 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     22 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     23 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     24 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     25 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     26 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     27 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     28 
     29 #include "c_gate.hpp"
     30 #include "state.ipp"
     31 
     32 
     33 /// Creates a new gateway to an existing C++ Lua state.
     34 ///
     35 /// \param state_ The state to connect to.  This object must remain alive while
     36 ///     the newly-constructed state_c_gate is alive.
     37 lutok::state_c_gate::state_c_gate(state& state_) :
     38     _state(state_)
     39 {
     40 }
     41 
     42 
     43 /// Destructor.
     44 ///
     45 /// Destroying this object has no implications on the life cycle of the Lua
     46 /// state.  Only the corresponding state object controls when the Lua state is
     47 /// closed.
     48 lutok::state_c_gate::~state_c_gate(void)
     49 {
     50 }
     51 
     52 
     53 /// Creates a C++ state for a C Lua state.
     54 ///
     55 /// \warning The created state object does NOT own the C state.  You must take
     56 /// care to properly destroy the input lua_State when you are done with it to
     57 /// not leak resources.
     58 ///
     59 /// \param raw_state The raw state to wrap temporarily.
     60 ///
     61 /// \return The wrapped state without strong ownership on the input state.
     62 lutok::state
     63 lutok::state_c_gate::connect(lua_State* raw_state)
     64 {
     65     return state(static_cast< void* >(raw_state));
     66 }
     67 
     68 
     69 /// Returns the C native Lua state.
     70 ///
     71 /// \return A native lua_State object holding the Lua C API state.
     72 lua_State*
     73 lutok::state_c_gate::c_state(void)
     74 {
     75     return static_cast< lua_State* >(_state.raw_state());
     76 }
     77