88 lines
4.6 KiB
C
88 lines
4.6 KiB
C
/*
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* luaobject.h - useful functions for handling Lua objects
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*
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* Copyright © 2009 Julien Danjou <julien@danjou.info>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#ifndef AWESOME_COMMON_LUAOBJECT
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#define AWESOME_COMMON_LUAOBJECT
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#include <lauxlib.h>
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#include "common/array.h"
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/** Type for Lua references */
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typedef int luaA_ref;
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static inline int
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luaA_settype(lua_State *L, const char *type)
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{
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luaL_getmetatable(L, type);
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lua_setmetatable(L, -2);
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return 1;
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}
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DO_ARRAY(luaA_ref, luaA_ref, DO_NOTHING)
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#define LUA_OBJECT_FUNCS(type, prefix, lua_type) \
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static inline type * \
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prefix##_new(lua_State *L) \
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{ \
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type *p = lua_newuserdata(L, sizeof(type)); \
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p_clear(p, 1); \
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luaA_settype(L, lua_type); \
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return p; \
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} \
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\
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static inline int \
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prefix##_push(lua_State *L, type *item) \
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{ \
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if(item) \
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{ \
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assert(item->refs.len); \
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lua_rawgeti(L, LUA_REGISTRYINDEX, item->refs.tab[0]); \
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} \
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else \
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lua_pushnil(L); \
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return 1; \
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} \
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\
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static inline type * \
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prefix##_ref(lua_State *L) \
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{ \
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if(lua_isnil(L, -1)) \
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return NULL; \
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type *item = luaL_checkudata(L, -1, lua_type); \
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luaA_ref_array_append(&item->refs, luaL_ref(L, LUA_REGISTRYINDEX)); \
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return item; \
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} \
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\
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static inline void \
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prefix##_unref(lua_State *L, type *item) \
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{ \
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if(item) \
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{ \
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assert(item->refs.len); \
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luaL_unref(L, LUA_REGISTRYINDEX, item->refs.tab[0]); \
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luaA_ref_array_take(&item->refs, 0); \
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} \
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}
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#endif
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// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80
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