/usr/include/luabind/detail/ref.hpp is in libluabind-dev 0.9.1+dfsg-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 | // Copyright (c) 2003 Daniel Wallin and Arvid Norberg
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
// ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
// TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
// SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
// ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
// OR OTHER DEALINGS IN THE SOFTWARE.
#ifndef LUABIND_REF_HPP_INCLUDED
#define LUABIND_REF_HPP_INCLUDED
#include <cassert>
#include <algorithm>
#include <luabind/config.hpp>
#include <luabind/lua_include.hpp>
namespace luabind
{
namespace detail
{
struct lua_reference
{
lua_reference(lua_State* L_ = 0)
: L(L_)
, m_ref(LUA_NOREF)
{}
lua_reference(lua_reference const& r)
: L(r.L)
, m_ref(LUA_NOREF)
{
if (!r.is_valid()) return;
r.get(L);
set(L);
}
~lua_reference() { reset(); }
lua_State* state() const { return L; }
void operator=(lua_reference const& r)
{
// TODO: self assignment problems
reset();
if (!r.is_valid()) return;
r.get(r.state());
set(r.state());
}
bool is_valid() const
{ return m_ref != LUA_NOREF; }
void set(lua_State* L_)
{
reset();
L = L_;
m_ref = luaL_ref(L, LUA_REGISTRYINDEX);
}
void replace(lua_State* L_)
{
lua_rawseti(L_, LUA_REGISTRYINDEX, m_ref);
}
// L may not be the same pointer as
// was used when creating this reference
// since it may be a thread that shares
// the same globals table.
void get(lua_State* L_) const
{
assert(m_ref != LUA_NOREF);
assert(L_);
lua_rawgeti(L_, LUA_REGISTRYINDEX, m_ref);
}
void reset()
{
if (L && m_ref != LUA_NOREF) luaL_unref(L, LUA_REGISTRYINDEX, m_ref);
m_ref = LUA_NOREF;
}
void swap(lua_reference& r)
{
assert(r.L == L);
std::swap(r.m_ref, m_ref);
}
private:
lua_State* L;
int m_ref;
};
}}
#endif // LUABIND_REF_HPP_INCLUDED
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