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/*
* Copyright (c) 2009-2017, Albertas Vyšniauskas
* 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 the software author 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.
*/
#include "Ref.h"
extern "C"{
#include <lualib.h>
#include <lauxlib.h>
}
namespace lua
{
Ref::Ref():
m_ref(LUA_NOREF),
m_L(nullptr)
{
}
Ref::Ref(lua_State *L, int index)
{
lua_pushvalue(L, index);
m_ref = luaL_ref(L, LUA_REGISTRYINDEX);
m_L = L;
}
Ref::Ref(Ref &&ref)
{
m_ref = ref.m_ref;
m_L = ref.m_L;
ref.m_ref = LUA_NOREF;
ref.m_L = nullptr;
}
Ref::~Ref()
{
if (m_L && m_ref != LUA_NOREF)
luaL_unref(m_L, LUA_REGISTRYINDEX, m_ref);
}
void Ref::get()
{
if (!m_L)
return;
lua_rawgeti(m_L, LUA_REGISTRYINDEX, m_ref);
}
lua_State *Ref::script()
{
return m_L;
}
Ref &Ref::operator=(Ref &&ref)
{
m_ref = ref.m_ref;
m_L = ref.m_L;
ref.m_ref = LUA_NOREF;
ref.m_L = nullptr;
return *this;
}
bool Ref::valid() const
{
return m_L && m_ref != LUA_NOREF;
}
}
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