testing/lua5.2-llthreads: new aport

Low-Level native threads module for Lua
https://github.com/Neopallium/lua-llthreads

4 files changed, 1152 insertions, 0 deletions

diff --git a/testing/lua5.2-llthreads/APKBUILD b/testing/lua5.2-llthreads/APKBUILD
new file mode 100644
index 000000000..b201e35ed
--- /dev/null
+++ b/testing/lua5.2-llthreads/APKBUILD
@@ -0,0 +1,57 @@
+# Contributor: Natanael Copa <ncopa@alpinelinux.org>
+# Maintainer: Natanael Copa <ncopa@alpinelinux.org>
+pkgname=lua5.2-llthreads
+pkgver=1.2
+pkgrel=0
+pkgdesc="Low-Level native threads module for Lua"
+url="https://github.com/Neopallium/lua-llthreads"
+arch="all"
+license="MIT"
+depends=""
+makedepends="cmake lua5.2-dev"
+install=""
+subpackages=
+source="lua-llthreads-$pkgver.tar.gz::https://github.com/Neopallium/lua-llthreads/archive/v$pkgver.tar.gz
+	bindings-1.patch
+	bindings-2.patch
+	lua-5.2.patch"
+
+_builddir="$srcdir"/lua-llthreads-$pkgver
+
+prepare() {
+	local i
+	cd "$_builddir"
+	for i in $source; do
+		case $i in
+		*.patch) msg $i; patch -p1 -i "$srcdir"/$i || return 1;;
+		esac
+	done
+}
+
+build() {
+	cd "$_builddir"
+	_luaver=$(lua -e 'print((_VERSION:match("^Lua (%d+%.%d+)")))')
+	cmake \
+		-DCMAKE_INSTALL_PREFIX=/usr \
+		-DINSTALL_CMOD=/usr/lib/lua/$_luaver \
+		. || return 1
+	make || return 1
+}
+
+package() {
+	cd "$_builddir"
+	make install DESTDIR="$pkgdir" || return 1
+}
+
+md5sums="d4adb2e6d4859bf33ebdb3bd6b6c6bb5  lua-llthreads-1.2.tar.gz
+399fa42d7dfa7ec2335bd7111b17935e  bindings-1.patch
+f892e9cb699eef2d5df406063a26d044  bindings-2.patch
+5f4a0b8c23968a521072c96c42435475  lua-5.2.patch"
+sha256sums="32df7dc903760825536def63fba834466c42e6bd17022d430893c9a6ca3ba8f2  lua-llthreads-1.2.tar.gz
+20c2cc64f09dd601fb85d867e7e57b8849a66d9b1992c647282a84af92127902  bindings-1.patch
+3bb62563bdd5e4b5261612b5d0498bed4b327f02c7b5ff4a85329b9bc7867b3c  bindings-2.patch
+5c7f28e7a3ef4e8d1ac6f0ef5cf5680ba58d0aa76e77260d6fe1c4ed74c4b586  lua-5.2.patch"
+sha512sums="d8b006e7f135e9c45d88c93d6acf30d41024bee66bd0747ba8112e28c2fe03fbd8f869d6235261108f3df30a08f3a812595a763c82a57674b5ec54a8ca915fa7  lua-llthreads-1.2.tar.gz
+eace4eb6226527697aa82b5e455b7ece3d651966f3525471f07476d84714550bb4f75447be34569d57f2ed52bbfd708458305b527621179cfa2f843ae684d931  bindings-1.patch
+fd5be1ec7293c0e279877ee139de53c1772c28957c30e276f5fe8e05314c31e81ae6ea18553fe67d912b3f9902b48cd88b962480f5855037783477bbb633e019  bindings-2.patch
+234e0afe81bbd2a40689a858febec8778962273553da6d7b876871bd996ed0ad28ca33a15b7e155c313b63f10b0f8bab3ee0a83c0cd14d3378884d0031df720d  lua-5.2.patch"
diff --git a/testing/lua5.2-llthreads/bindings-1.patch b/testing/lua5.2-llthreads/bindings-1.patch
new file mode 100644
index 000000000..72c116f4f
--- /dev/null
+++ b/testing/lua5.2-llthreads/bindings-1.patch
@@ -0,0 +1,650 @@
+From dee5a6fabc51c22607fefb5f7a9dd8fe32d098aa Mon Sep 17 00:00:00 2001
+From: "Robert G. Jakabosky" <bobby@sharedrealm.com>
+Date: Mon, 13 Feb 2012 01:47:15 -0800
+Subject: [PATCH] Update pre-generated bindings.
+
+---
+ src/pre_generated-llthreads.nobj.c | 378 +++++++++++++++++++++++++++++--------
+ 1 file changed, 302 insertions(+), 76 deletions(-)
+
+diff --git a/src/pre_generated-llthreads.nobj.c b/src/pre_generated-llthreads.nobj.c
+index 6f53fe5..a7ce73a 100644
+--- a/src/pre_generated-llthreads.nobj.c
++++ b/src/pre_generated-llthreads.nobj.c
+@@ -10,13 +10,14 @@
+ #include "lauxlib.h"
+ #include "lualib.h"
+ 
+-
+-
+ #define REG_PACKAGE_IS_CONSTRUCTOR 0
++#define REG_MODULES_AS_GLOBALS 0
+ #define REG_OBJECTS_AS_GLOBALS 0
+ #define OBJ_DATA_HIDDEN_METATABLE 1
+-#define LUAJIT_FFI 0
+ #define USE_FIELD_GET_SET_METHODS 0
++#define LUAJIT_FFI 0
++
++
+ 
+ 
+ 
+@@ -95,19 +96,26 @@
+ #define assert_obj_type(type, obj)
+ #endif
+ 
+-#ifndef obj_type_free
++void *nobj_realloc(void *ptr, size_t osize, size_t nsize);
++
++void *nobj_realloc(void *ptr, size_t osize, size_t nsize) {
++	(void)osize;
++	if(0 == nsize) {
++		free(ptr);
++		return NULL;
++	}
++	return realloc(ptr, nsize);
++}
++
+ #define obj_type_free(type, obj) do { \
+ 	assert_obj_type(type, obj); \
+-	free((obj)); \
++	nobj_realloc((obj), sizeof(type), 0); \
+ } while(0)
+-#endif
+ 
+-#ifndef obj_type_new
+ #define obj_type_new(type, obj) do { \
+ 	assert_obj_type(type, obj); \
+-	(obj) = malloc(sizeof(type)); \
++	(obj) = nobj_realloc(NULL, 0, sizeof(type)); \
+ } while(0)
+-#endif
+ 
+ typedef struct obj_type obj_type;
+ 
+@@ -165,15 +173,22 @@ struct obj_type {
+ 	uint32_t        flags;  /**< is_writable:1bit */
+ } obj_field;
+ 
++typedef enum {
++	REG_OBJECT,
++	REG_PACKAGE,
++	REG_META,
++} module_reg_type;
++
+ typedef struct reg_sub_module {
+ 	obj_type        *type;
+-	int             is_package;
++	module_reg_type req_type;
+ 	const luaL_reg  *pub_funcs;
+ 	const luaL_reg  *methods;
+ 	const luaL_reg  *metas;
+ 	const obj_base  *bases;
+ 	const obj_field *fields;
+ 	const obj_const *constants;
++	int             bidirectional_consts;
+ } reg_sub_module;
+ 
+ #define OBJ_UDATA_FLAG_OWN (1<<0)
+@@ -185,18 +200,26 @@ struct obj_type {
+ } obj_udata;
+ 
+ /* use static pointer as key to weak userdata table. */
+-static char *obj_udata_weak_ref_key = "obj_udata_weak_ref_key";
++static char obj_udata_weak_ref_key[] = "obj_udata_weak_ref_key";
++
++/* use static pointer as key to module's private table. */
++static char obj_udata_private_key[] = "obj_udata_private_key";
+ 
+ #if LUAJIT_FFI
++typedef int (*ffi_export_func_t)(void);
+ typedef struct ffi_export_symbol {
+ 	const char *name;
+-	void       *sym;
++	union {
++	void               *data;
++	ffi_export_func_t  func;
++	} sym;
+ } ffi_export_symbol;
+ #endif
+ 
+ 
+ 
+ 
++
+ static obj_type obj_types[] = {
+ #define obj_type_id_Lua_LLThread 0
+ #define obj_type_Lua_LLThread (obj_types[obj_type_id_Lua_LLThread])
+@@ -205,10 +228,101 @@ struct obj_type {
+ };
+ 
+ 
++#if LUAJIT_FFI
++
++/* nobj_ffi_support_enabled_hint should be set to 1 when FFI support is enabled in at-least one
++ * instance of a LuaJIT state.  It should never be set back to 0. */
++static int nobj_ffi_support_enabled_hint = 0;
++static const char nobj_ffi_support_key[] = "LuaNativeObject_FFI_SUPPORT";
++static const char nobj_check_ffi_support_code[] =
++"local stat, ffi=pcall(require,\"ffi\")\n" /* try loading LuaJIT`s FFI module. */
++"if not stat then return false end\n"
++"return true\n";
++
++static int nobj_check_ffi_support(lua_State *L) {
++	int rc;
++	int err;
++
++	/* check if ffi test has already been done. */
++	lua_pushstring(L, nobj_ffi_support_key);
++	lua_rawget(L, LUA_REGISTRYINDEX);
++	if(!lua_isnil(L, -1)) {
++		rc = lua_toboolean(L, -1);
++		lua_pop(L, 1);
++		return rc; /* return results of previous check. */
++	}
++	lua_pop(L, 1); /* pop nil. */
++
++	err = luaL_loadbuffer(L, nobj_check_ffi_support_code,
++		sizeof(nobj_check_ffi_support_code) - 1, nobj_ffi_support_key);
++	if(0 == err) {
++		err = lua_pcall(L, 0, 1, 0);
++	}
++	if(err) {
++		const char *msg = "<err not a string>";
++		if(lua_isstring(L, -1)) {
++			msg = lua_tostring(L, -1);
++		}
++		printf("Error when checking for FFI-support: %s\n", msg);
++		lua_pop(L, 1); /* pop error message. */
++		return 0;
++	}
++	/* check results of test. */
++	rc = lua_toboolean(L, -1);
++	lua_pop(L, 1); /* pop results. */
++		/* cache results. */
++	lua_pushstring(L, nobj_ffi_support_key);
++	lua_pushboolean(L, rc);
++	lua_rawset(L, LUA_REGISTRYINDEX);
++
++	/* turn-on hint that there is FFI code enabled. */
++	if(rc) {
++		nobj_ffi_support_enabled_hint = 1;
++	}
++
++	return rc;
++}
++
++static int nobj_try_loading_ffi(lua_State *L, const char *ffi_mod_name,
++		const char *ffi_init_code, const ffi_export_symbol *ffi_exports, int priv_table)
++{
++	int err;
++
++	/* export symbols to priv_table. */
++	while(ffi_exports->name != NULL) {
++		lua_pushstring(L, ffi_exports->name);
++		lua_pushlightuserdata(L, ffi_exports->sym.data);
++		lua_settable(L, priv_table);
++		ffi_exports++;
++	}
++	err = luaL_loadbuffer(L, ffi_init_code, strlen(ffi_init_code), ffi_mod_name);
++	if(0 == err) {
++		lua_pushvalue(L, -2); /* dup C module's table. */
++		lua_pushvalue(L, priv_table); /* move priv_table to top of stack. */
++		lua_remove(L, priv_table);
++		lua_pushvalue(L, LUA_REGISTRYINDEX);
++		err = lua_pcall(L, 3, 0, 0);
++	}
++	if(err) {
++		const char *msg = "<err not a string>";
++		if(lua_isstring(L, -1)) {
++			msg = lua_tostring(L, -1);
++		}
++		printf("Failed to install FFI-based bindings: %s\n", msg);
++		lua_pop(L, 1); /* pop error message. */
++	}
++	return err;
++}
++#endif
++
+ #ifndef REG_PACKAGE_IS_CONSTRUCTOR
+ #define REG_PACKAGE_IS_CONSTRUCTOR 1
+ #endif
+ 
++#ifndef REG_MODULES_AS_GLOBALS
++#define REG_MODULES_AS_GLOBALS 0
++#endif
++
+ #ifndef REG_OBJECTS_AS_GLOBALS
+ #define REG_OBJECTS_AS_GLOBALS 0
+ #endif
+@@ -296,6 +410,25 @@ static FUNC_UNUSED obj_udata *obj_udata_luacheck_internal(lua_State *L, int _ind
+ 				return ud;
+ 			}
+ 		}
++	} else {
++		/* handle cdata. */
++		/* get private table. */
++		lua_pushlightuserdata(L, obj_udata_private_key);
++		lua_rawget(L, LUA_REGISTRYINDEX); /* private table. */
++		/* get cdata type check function from private table. */
++		lua_pushlightuserdata(L, type);
++		lua_rawget(L, -2);
++
++		/* pass cdata value to type checking function. */
++		lua_pushvalue(L, _index);
++		lua_call(L, 1, 1);
++		if(!lua_isnil(L, -1)) {
++			/* valid type get pointer from cdata. */
++			lua_pop(L, 2);
++			*obj = *(void **)lua_topointer(L, _index);
++			return ud;
++		}
++		lua_pop(L, 2);
+ 	}
+ 	if(not_delete) {
+ 		luaL_typerror(L, _index, type->name); /* is not a userdata value. */
+@@ -309,6 +442,15 @@ static FUNC_UNUSED void *obj_udata_luacheck(lua_State *L, int _index, obj_type *
+ 	return obj;
+ }
+ 
++static FUNC_UNUSED void *obj_udata_luaoptional(lua_State *L, int _index, obj_type *type) {
++	void *obj = NULL;
++	if(lua_isnil(L, _index)) {
++		return obj;
++	}
++	obj_udata_luacheck_internal(L, _index, &(obj), type, 1);
++	return obj;
++}
++
+ static FUNC_UNUSED void *obj_udata_luadelete(lua_State *L, int _index, obj_type *type, int *flags) {
+ 	void *obj;
+ 	obj_udata *ud = obj_udata_luacheck_internal(L, _index, &(obj), type, 0);
+@@ -327,6 +469,17 @@ static FUNC_UNUSED void obj_udata_luapush(lua_State *L, void *obj, obj_type *typ
+ 		lua_pushnil(L);
+ 		return;
+ 	}
++#if LUAJIT_FFI
++	lua_pushlightuserdata(L, type);
++	lua_rawget(L, LUA_REGISTRYINDEX); /* type's metatable. */
++	if(nobj_ffi_support_enabled_hint && lua_isfunction(L, -1)) {
++		/* call special FFI "void *" to FFI object convertion function. */
++		lua_pushlightuserdata(L, obj);
++		lua_pushinteger(L, flags);
++		lua_call(L, 2, 1);
++		return;
++	}
++#endif
+ 	/* check for type caster. */
+ 	if(type->dcaster) {
+ 		(type->dcaster)(&obj, &type);
+@@ -336,8 +489,12 @@ static FUNC_UNUSED void obj_udata_luapush(lua_State *L, void *obj, obj_type *typ
+ 	ud->obj = obj;
+ 	ud->flags = flags;
+ 	/* get obj_type metatable. */
++#if LUAJIT_FFI
++	lua_insert(L, -2); /* move userdata below metatable. */
++#else
+ 	lua_pushlightuserdata(L, type);
+ 	lua_rawget(L, LUA_REGISTRYINDEX); /* type's metatable. */
++#endif
+ 	lua_setmetatable(L, -2);
+ }
+ 
+@@ -383,6 +540,18 @@ static FUNC_UNUSED void obj_udata_luapush_weak(lua_State *L, void *obj, obj_type
+ 	}
+ 	lua_pop(L, 1);  /* pop nil. */
+ 
++#if LUAJIT_FFI
++	lua_pushlightuserdata(L, type);
++	lua_rawget(L, LUA_REGISTRYINDEX); /* type's metatable. */
++	if(nobj_ffi_support_enabled_hint && lua_isfunction(L, -1)) {
++		lua_remove(L, -2);
++		/* call special FFI "void *" to FFI object convertion function. */
++		lua_pushlightuserdata(L, obj);
++		lua_pushinteger(L, flags);
++		lua_call(L, 2, 1);
++		return;
++	}
++#endif
+ 	/* create new userdata. */
+ 	ud = (obj_udata *)lua_newuserdata(L, sizeof(obj_udata));
+ 
+@@ -390,8 +559,12 @@ static FUNC_UNUSED void obj_udata_luapush_weak(lua_State *L, void *obj, obj_type
+ 	ud->obj = obj;
+ 	ud->flags = flags;
+ 	/* get obj_type metatable. */
++#if LUAJIT_FFI
++	lua_insert(L, -2); /* move userdata below metatable. */
++#else
+ 	lua_pushlightuserdata(L, type);
+ 	lua_rawget(L, LUA_REGISTRYINDEX); /* type's metatable. */
++#endif
+ 	lua_setmetatable(L, -2);
+ 
+ 	/* add weak reference to object. */
+@@ -455,15 +628,39 @@ static FUNC_UNUSED void * obj_simple_udata_luacheck(lua_State *L, int _index, ob
+ 				return ud;
+ 			}
+ 		}
++	} else {
++		/* handle cdata. */
++		/* get private table. */
++		lua_pushlightuserdata(L, obj_udata_private_key);
++		lua_rawget(L, LUA_REGISTRYINDEX); /* private table. */
++		/* get cdata type check function from private table. */
++		lua_pushlightuserdata(L, type);
++		lua_rawget(L, -2);
++
++		/* pass cdata value to type checking function. */
++		lua_pushvalue(L, _index);
++		lua_call(L, 1, 1);
++		if(!lua_isnil(L, -1)) {
++			/* valid type get pointer from cdata. */
++			lua_pop(L, 2);
++			return (void *)lua_topointer(L, _index);
++		}
++		lua_pop(L, 2);
+ 	}
+ 	luaL_typerror(L, _index, type->name); /* is not a userdata value. */
+ 	return NULL;
+ }
+ 
+-static FUNC_UNUSED void * obj_simple_udata_luadelete(lua_State *L, int _index, obj_type *type, int *flags) {
++static FUNC_UNUSED void * obj_simple_udata_luaoptional(lua_State *L, int _index, obj_type *type) {
++	if(lua_isnil(L, _index)) {
++		return NULL;
++	}
++	return obj_simple_udata_luacheck(L, _index, type);
++}
++
++static FUNC_UNUSED void * obj_simple_udata_luadelete(lua_State *L, int _index, obj_type *type) {
+ 	void *obj;
+ 	obj = obj_simple_udata_luacheck(L, _index, type);
+-	*flags = OBJ_UDATA_FLAG_OWN;
+ 	/* clear the metatable to invalidate userdata. */
+ 	lua_pushnil(L);
+ 	lua_setmetatable(L, _index);
+@@ -472,12 +669,26 @@ static FUNC_UNUSED void * obj_simple_udata_luadelete(lua_State *L, int _index, o
+ 
+ static FUNC_UNUSED void *obj_simple_udata_luapush(lua_State *L, void *obj, int size, obj_type *type)
+ {
++#if LUAJIT_FFI
++	lua_pushlightuserdata(L, type);
++	lua_rawget(L, LUA_REGISTRYINDEX); /* type's metatable. */
++	if(nobj_ffi_support_enabled_hint && lua_isfunction(L, -1)) {
++		/* call special FFI "void *" to FFI object convertion function. */
++		lua_pushlightuserdata(L, obj);
++		lua_call(L, 1, 1);
++		return obj;
++	}
++#endif
+ 	/* create new userdata. */
+ 	void *ud = lua_newuserdata(L, size);
+ 	memcpy(ud, obj, size);
+ 	/* get obj_type metatable. */
++#if LUAJIT_FFI
++	lua_insert(L, -2); /* move userdata below metatable. */
++#else
+ 	lua_pushlightuserdata(L, type);
+ 	lua_rawget(L, LUA_REGISTRYINDEX); /* type's metatable. */
++#endif
+ 	lua_setmetatable(L, -2);
+ 
+ 	return ud;
+@@ -526,7 +737,8 @@ static int obj_constructor_call_wrapper(lua_State *L) {
+ 	return lua_gettop(L);
+ }
+ 
+-static void obj_type_register_constants(lua_State *L, const obj_const *constants, int tab_idx) {
++static void obj_type_register_constants(lua_State *L, const obj_const *constants, int tab_idx,
++		int bidirectional) {
+ 	/* register constants. */
+ 	while(constants->name != NULL) {
+ 		lua_pushstring(L, constants->name);
+@@ -544,6 +756,22 @@ static void obj_type_register_constants(lua_State *L, const obj_const *constants
+ 			lua_pushnil(L);
+ 			break;
+ 		}
++		/* map values back to keys. */
++		if(bidirectional) {
++			/* check if value already exists. */
++			lua_pushvalue(L, -1);
++			lua_rawget(L, tab_idx - 3);
++			if(lua_isnil(L, -1)) {
++				lua_pop(L, 1);
++				/* add value->key mapping. */
++				lua_pushvalue(L, -1);
++				lua_pushvalue(L, -3);
++				lua_rawset(L, tab_idx - 4);
++			} else {
++				/* value already exists. */
++				lua_pop(L, 1);
++			}
++		}
+ 		lua_rawset(L, tab_idx - 2);
+ 		constants++;
+ 	}
+@@ -558,20 +786,48 @@ static void obj_type_register_package(lua_State *L, const reg_sub_module *type_r
+ 		luaL_register(L, NULL, reg_list);
+ 	}
+ 
+-	obj_type_register_constants(L, type_reg->constants, -1);
++	obj_type_register_constants(L, type_reg->constants, -1, type_reg->bidirectional_consts);
+ 
+ 	lua_pop(L, 1);  /* drop package table */
+ }
+ 
++static void obj_type_register_meta(lua_State *L, const reg_sub_module *type_reg) {
++	const luaL_reg *reg_list;
++
++	/* create public functions table. */
++	reg_list = type_reg->pub_funcs;
++	if(reg_list != NULL && reg_list[0].name != NULL) {
++		/* register functions */
++		luaL_register(L, NULL, reg_list);
++	}
++
++	obj_type_register_constants(L, type_reg->constants, -1, type_reg->bidirectional_consts);
++
++	/* register methods. */
++	luaL_register(L, NULL, type_reg->methods);
++
++	/* create metatable table. */
++	lua_newtable(L);
++	luaL_register(L, NULL, type_reg->metas); /* fill metatable */
++	/* setmetatable on meta-object. */
++	lua_setmetatable(L, -2);
++
++	lua_pop(L, 1);  /* drop meta-object */
++}
++
+ static void obj_type_register(lua_State *L, const reg_sub_module *type_reg, int priv_table) {
+ 	const luaL_reg *reg_list;
+ 	obj_type *type = type_reg->type;
+ 	const obj_base *base = type_reg->bases;
+ 
+-	if(type_reg->is_package == 1) {
++	if(type_reg->req_type == REG_PACKAGE) {
+ 		obj_type_register_package(L, type_reg);
+ 		return;
+ 	}
++	if(type_reg->req_type == REG_META) {
++		obj_type_register_meta(L, type_reg);
++		return;
++	}
+ 
+ 	/* create public functions table. */
+ 	reg_list = type_reg->pub_funcs;
+@@ -620,14 +876,10 @@ static void obj_type_register(lua_State *L, const reg_sub_module *type_reg, int
+ 	lua_pushvalue(L, -2); /* dup metatable. */
+ 	lua_rawset(L, LUA_REGISTRYINDEX);    /* REGISTRY[type] = metatable */
+ 
+-#if LUAJIT_FFI
+ 	/* add metatable to 'priv_table' */
+ 	lua_pushstring(L, type->name);
+ 	lua_pushvalue(L, -2); /* dup metatable. */
+ 	lua_rawset(L, priv_table);    /* priv_table["<object_name>"] = metatable */
+-#else
+-	(void)priv_table;
+-#endif
+ 
+ 	luaL_register(L, NULL, type_reg->metas); /* fill metatable */
+ 
+@@ -638,7 +890,7 @@ static void obj_type_register(lua_State *L, const reg_sub_module *type_reg, int
+ 		base++;
+ 	}
+ 
+-	obj_type_register_constants(L, type_reg->constants, -2);
++	obj_type_register_constants(L, type_reg->constants, -2, type_reg->bidirectional_consts);
+ 
+ 	lua_pushliteral(L, "__index");
+ 	lua_pushvalue(L, -3);               /* dup methods table */
+@@ -658,54 +910,12 @@ static FUNC_UNUSED int lua_checktype_ref(lua_State *L, int _index, int _type) {
+ 	return luaL_ref(L, LUA_REGISTRYINDEX);
+ }
+ 
+-#if LUAJIT_FFI
+-static int nobj_udata_new_ffi(lua_State *L) {
+-	size_t size = luaL_checkinteger(L, 1);
+-	luaL_checktype(L, 2, LUA_TTABLE);
+-	lua_settop(L, 2);
+-	/* create userdata. */
+-	lua_newuserdata(L, size);
+-	lua_replace(L, 1);
+-	/* set userdata's metatable. */
+-	lua_setmetatable(L, 1);
+-	return 1;
+-}
+-
+-static int nobj_try_loading_ffi(lua_State *L, const char *ffi_mod_name,
+-		const char *ffi_init_code, const ffi_export_symbol *ffi_exports, int priv_table)
+-{
+-	int err;
+-
+-	/* export symbols to priv_table. */
+-	while(ffi_exports->name != NULL) {
+-		lua_pushstring(L, ffi_exports->name);
+-		lua_pushlightuserdata(L, ffi_exports->sym);
+-		lua_settable(L, priv_table);
+-		ffi_exports++;
+-	}
+-	err = luaL_loadbuffer(L, ffi_init_code, strlen(ffi_init_code), ffi_mod_name);
+-	if(0 == err) {
+-		lua_pushvalue(L, -2); /* dup C module's table. */
+-		lua_pushvalue(L, priv_table); /* move priv_table to top of stack. */
+-		lua_remove(L, priv_table);
+-		lua_pushcfunction(L, nobj_udata_new_ffi);
+-		err = lua_pcall(L, 3, 0, 0);
+-	}
+-	if(err) {
+-		const char *msg = "<err not a string>";
+-		if(lua_isstring(L, -1)) {
+-			msg = lua_tostring(L, -1);
+-		}
+-		printf("Failed to install FFI-based bindings: %s\n", msg);
+-		lua_pop(L, 1); /* pop error message. */
+-	}
+-	return err;
+-}
+-#endif
+ 
+ 
+ #define obj_type_Lua_LLThread_check(L, _index) \
+ 	obj_udata_luacheck(L, _index, &(obj_type_Lua_LLThread))
++#define obj_type_Lua_LLThread_optional(L, _index) \
++	obj_udata_luaoptional(L, _index, &(obj_type_Lua_LLThread))
+ #define obj_type_Lua_LLThread_delete(L, _index, flags) \
+ 	obj_udata_luadelete_weak(L, _index, &(obj_type_Lua_LLThread), flags)
+ #define obj_type_Lua_LLThread_push(L, obj, flags) \
+@@ -714,8 +924,6 @@ static int nobj_try_loading_ffi(lua_State *L, const char *ffi_mod_name,
+ 
+ 
+ 
+-
+-
+ /* maximum recursive depth of table copies. */
+ #define MAX_COPY_DEPTH 30
+ 
+@@ -1106,7 +1314,7 @@ static Lua_LLThread *llthread_create(lua_State *L, const char *code, size_t code
+ 
+ 
+ 
+-/* method: delete */
++/* method: _priv */
+ static int Lua_LLThread__delete__meth(lua_State *L) {
+   int this_flags_idx1 = 0;
+   Lua_LLThread * this_idx1 = obj_type_Lua_LLThread_delete(L,1,&(this_flags_idx1));
+@@ -1264,14 +1472,21 @@ static int llthreads__new__func(lua_State *L) {
+ 
+ 
+ static const reg_sub_module reg_sub_modules[] = {
+-  { &(obj_type_Lua_LLThread), 0, obj_Lua_LLThread_pub_funcs, obj_Lua_LLThread_methods, obj_Lua_LLThread_metas, obj_Lua_LLThread_bases, obj_Lua_LLThread_fields, obj_Lua_LLThread_constants},
+-  {NULL, 0, NULL, NULL, NULL, NULL, NULL, NULL}
++  { &(obj_type_Lua_LLThread), REG_OBJECT, obj_Lua_LLThread_pub_funcs, obj_Lua_LLThread_methods, obj_Lua_LLThread_metas, obj_Lua_LLThread_bases, obj_Lua_LLThread_fields, obj_Lua_LLThread_constants, 0},
++  {NULL, 0, NULL, NULL, NULL, NULL, NULL, NULL, 0}
+ };
+ 
+ 
+ 
+ 
+ 
++#if LUAJIT_FFI
++static const ffi_export_symbol llthreads_ffi_export[] = {
++  {NULL, { .data = NULL } }
++};
++#endif
++
++
+ 
+ 
+ static const luaL_Reg submodule_libs[] = {
+@@ -1304,20 +1519,26 @@ LUA_NOBJ_API int luaopen_llthreads(lua_State *L) {
+ 	const luaL_Reg *submodules = submodule_libs;
+ 	int priv_table = -1;
+ 
+-#if LUAJIT_FFI
+ 	/* private table to hold reference to object metatables. */
+ 	lua_newtable(L);
+ 	priv_table = lua_gettop(L);
+-#endif
++	lua_pushlightuserdata(L, obj_udata_private_key);
++	lua_pushvalue(L, priv_table);
++	lua_rawset(L, LUA_REGISTRYINDEX);  /* store private table in registry. */
+ 
+ 	/* create object cache. */
+ 	create_object_instance_cache(L);
+ 
+ 	/* module table. */
++#if REG_MODULES_AS_GLOBALS
+ 	luaL_register(L, "llthreads", llthreads_function);
++#else
++	lua_newtable(L);
++	luaL_register(L, NULL, llthreads_function);
++#endif
+ 
+ 	/* register module constants. */
+-	obj_type_register_constants(L, llthreads_constants, -1);
++	obj_type_register_constants(L, llthreads_constants, -1, 0);
+ 
+ 	for(; submodules->func != NULL ; submodules++) {
+ 		lua_pushcfunction(L, submodules->func);
+@@ -1338,9 +1559,14 @@ LUA_NOBJ_API int luaopen_llthreads(lua_State *L) {
+ 	}
+ 
+ #if LUAJIT_FFI
+-	nobj_try_loading_ffi(L, "llthreads", llthreads_ffi_lua_code,
+-		llthreads_ffi_export, priv_table);
++	if(nobj_check_ffi_support(L)) {
++		nobj_try_loading_ffi(L, "llthreads", llthreads_ffi_lua_code,
++			llthreads_ffi_export, priv_table);
++	}
+ #endif
++
++
++
+ 	return 1;
+ }
+ 
+-- 
+1.8.1.6
+
diff --git a/testing/lua5.2-llthreads/bindings-2.patch b/testing/lua5.2-llthreads/bindings-2.patch
new file mode 100644
index 000000000..226ba322c
--- /dev/null
+++ b/testing/lua5.2-llthreads/bindings-2.patch
@@ -0,0 +1,109 @@
+From 25687f0babcc2b3cdc8b42c7ecf8a34f751062d6 Mon Sep 17 00:00:00 2001
+From: "Robert G. Jakabosky" <bobby@sharedrealm.com>
+Date: Fri, 2 Mar 2012 17:34:04 -0800
+Subject: [PATCH] Re-generate bindings.
+
+---
+ src/pre_generated-llthreads.nobj.c | 35 +++++++++++++++++++++++++++++------
+ 1 file changed, 29 insertions(+), 6 deletions(-)
+
+diff --git a/src/pre_generated-llthreads.nobj.c b/src/pre_generated-llthreads.nobj.c
+index b2d1185..d016651 100644
+--- a/src/pre_generated-llthreads.nobj.c
++++ b/src/pre_generated-llthreads.nobj.c
+@@ -56,7 +56,7 @@
+ #define true 1
+ #endif
+ #ifndef false
+-#define false 1
++#define false 0
+ #endif
+ 
+ #endif
+@@ -250,7 +250,8 @@ static int nobj_check_ffi_support(lua_State *L) {
+ 	if(!lua_isnil(L, -1)) {
+ 		rc = lua_toboolean(L, -1);
+ 		lua_pop(L, 1);
+-		return rc; /* return results of previous check. */
++		/* use results of previous check. */
++		goto finished;
+ 	}
+ 	lua_pop(L, 1); /* pop nil. */
+ 
+@@ -276,6 +277,7 @@ static int nobj_check_ffi_support(lua_State *L) {
+ 	lua_pushboolean(L, rc);
+ 	lua_rawset(L, LUA_REGISTRYINDEX);
+ 
++finished:
+ 	/* turn-on hint that there is FFI code enabled. */
+ 	if(rc) {
+ 		nobj_ffi_support_enabled_hint = 1;
+@@ -284,9 +286,29 @@ static int nobj_check_ffi_support(lua_State *L) {
+ 	return rc;
+ }
+ 
++typedef struct {
++	const char **ffi_init_code;
++	int offset;
++} nobj_reader_state;
++
++static const char *nobj_lua_Reader(lua_State *L, void *data, size_t *size) {
++	nobj_reader_state *state = (nobj_reader_state *)data;
++	const char *ptr;
++
++	ptr = state->ffi_init_code[state->offset];
++	if(ptr != NULL) {
++		*size = strlen(ptr);
++		state->offset++;
++	} else {
++		*size = 0;
++	}
++	return ptr;
++}
++
+ static int nobj_try_loading_ffi(lua_State *L, const char *ffi_mod_name,
+-		const char *ffi_init_code, const ffi_export_symbol *ffi_exports, int priv_table)
++		const char *ffi_init_code[], const ffi_export_symbol *ffi_exports, int priv_table)
+ {
++	nobj_reader_state state = { ffi_init_code, 0 };
+ 	int err;
+ 
+ 	/* export symbols to priv_table. */
+@@ -296,7 +318,7 @@ static int nobj_try_loading_ffi(lua_State *L, const char *ffi_mod_name,
+ 		lua_settable(L, priv_table);
+ 		ffi_exports++;
+ 	}
+-	err = luaL_loadbuffer(L, ffi_init_code, strlen(ffi_init_code), ffi_mod_name);
++	err = lua_load(L, nobj_lua_Reader, &state, ffi_mod_name);
+ 	if(0 == err) {
+ 		lua_pushvalue(L, -2); /* dup C module's table. */
+ 		lua_pushvalue(L, priv_table); /* move priv_table to top of stack. */
+@@ -670,6 +692,7 @@ static FUNC_UNUSED void * obj_simple_udata_luadelete(lua_State *L, int _index, o
+ 
+ static FUNC_UNUSED void *obj_simple_udata_luapush(lua_State *L, void *obj, int size, obj_type *type)
+ {
++	void *ud;
+ #if LUAJIT_FFI
+ 	lua_pushlightuserdata(L, type);
+ 	lua_rawget(L, LUA_REGISTRYINDEX); /* type's metatable. */
+@@ -681,7 +704,7 @@ static FUNC_UNUSED void *obj_simple_udata_luapush(lua_State *L, void *obj, int s
+ 	}
+ #endif
+ 	/* create new userdata. */
+-	void *ud = lua_newuserdata(L, size);
++	ud = lua_newuserdata(L, size);
+ 	memcpy(ud, obj, size);
+ 	/* get obj_type metatable. */
+ #if LUAJIT_FFI
+@@ -1483,7 +1506,7 @@ static int llthreads__new__func(lua_State *L) {
+ 
+ #if LUAJIT_FFI
+ static const ffi_export_symbol llthreads_ffi_export[] = {
+-  {NULL, { .data = NULL } }
++  {NULL, { NULL } }
+ };
+ #endif
+ 
+-- 
+1.8.1.6
+
diff --git a/testing/lua5.2-llthreads/lua-5.2.patch b/testing/lua5.2-llthreads/lua-5.2.patch
new file mode 100644
index 000000000..354b4d42a
--- /dev/null
+++ b/testing/lua5.2-llthreads/lua-5.2.patch
@@ -0,0 +1,336 @@
+From 58b5d127c94138e1c46fdbed993bea52c90585fd Mon Sep 17 00:00:00 2001
+From: "Robert G. Jakabosky" <bobby@sharedrealm.com>
+Date: Tue, 16 Oct 2012 00:52:40 -0700
+Subject: [PATCH] Add support for Lua 5.2
+
+---
+ src/pre_generated-llthreads.nobj.c | 117 +++++++++++++++++++++++++++++--------
+ src/thread.nobj.lua                |  19 +++++-
+ 2 files changed, 110 insertions(+), 26 deletions(-)
+
+diff --git a/src/pre_generated-llthreads.nobj.c b/src/pre_generated-llthreads.nobj.c
+index ed9c43b..ff70704 100644
+--- a/src/pre_generated-llthreads.nobj.c
++++ b/src/pre_generated-llthreads.nobj.c
+@@ -10,6 +10,54 @@
+ #include "lauxlib.h"
+ #include "lualib.h"
+ 
++/* some Lua 5.0 compatibility support. */
++#if !defined(lua_pushliteral)
++#define lua_pushliteral(L, s) lua_pushstring(L, "" s, (sizeof(s)/sizeof(char))-1)
++#endif
++
++#if !defined(LUA_VERSION_NUM)
++#define lua_pushinteger(L, n) lua_pushnumber(L, (lua_Number)n)
++#define luaL_Reg luaL_reg
++#endif
++
++/* some Lua 5.1 compatibility support. */
++#if !defined(LUA_VERSION_NUM) || (LUA_VERSION_NUM == 501)
++/*
++** Adapted from Lua 5.2.0
++*/
++static void luaL_setfuncs (lua_State *L, const luaL_Reg *l, int nup) {
++  luaL_checkstack(L, nup, "too many upvalues");
++  for (; l->name != NULL; l++) {  /* fill the table with given functions */
++    int i;
++    for (i = 0; i < nup; i++)  /* copy upvalues to the top */
++      lua_pushvalue(L, -nup);
++    lua_pushstring(L, l->name);
++    lua_pushcclosure(L, l->func, nup);  /* closure with those upvalues */
++    lua_settable(L, -(nup + 3));
++  }
++  lua_pop(L, nup);  /* remove upvalues */
++}
++
++#define lua_load_no_mode(L, reader, data, source) \
++	lua_load(L, reader, data, source)
++
++#define lua_rawlen(L, idx) lua_objlen(L, idx)
++
++#endif
++
++#if LUA_VERSION_NUM == 502
++
++#define lua_load_no_mode(L, reader, data, source) \
++	lua_load(L, reader, data, source, NULL)
++
++static int luaL_typerror (lua_State *L, int narg, const char *tname) {
++  const char *msg = lua_pushfstring(L, "%s expected, got %s",
++                                    tname, luaL_typename(L, narg));
++  return luaL_argerror(L, narg, msg);
++}
++
++#endif
++
+ #define REG_PACKAGE_IS_CONSTRUCTOR 0
+ #define REG_MODULES_AS_GLOBALS 0
+ #define REG_OBJECTS_AS_GLOBALS 0
+@@ -189,9 +237,9 @@ struct obj_type {
+ typedef struct reg_sub_module {
+ 	obj_type        *type;
+ 	module_reg_type req_type;
+-	const luaL_reg  *pub_funcs;
+-	const luaL_reg  *methods;
+-	const luaL_reg  *metas;
++	const luaL_Reg  *pub_funcs;
++	const luaL_Reg  *methods;
++	const luaL_Reg  *metas;
+ 	const obj_base  *bases;
+ 	const obj_field *fields;
+ 	const obj_const *constants;
+@@ -326,7 +374,7 @@ static int nobj_try_loading_ffi(lua_State *L, const char *ffi_mod_name,
+ 		lua_settable(L, priv_table);
+ 		ffi_exports++;
+ 	}
+-	err = lua_load(L, nobj_lua_Reader, &state, ffi_mod_name);
++	err = lua_load_no_mode(L, nobj_lua_Reader, &state, ffi_mod_name);
+ 	if(0 == err) {
+ 		lua_pushvalue(L, -2); /* dup C module's table. */
+ 		lua_pushvalue(L, priv_table); /* move priv_table to top of stack. */
+@@ -531,6 +579,12 @@ static void obj_type_register_implements(lua_State *L, const reg_impl *impls) {
+ #define REG_MODULES_AS_GLOBALS 0
+ #endif
+ 
++/* For Lua 5.2 don't register modules as globals. */
++#if LUA_VERSION_NUM == 502
++#undef REG_MODULES_AS_GLOBALS
++#define REG_MODULES_AS_GLOBALS 0
++#endif
++
+ #ifndef REG_OBJECTS_AS_GLOBALS
+ #define REG_OBJECTS_AS_GLOBALS 0
+ #endif
+@@ -591,7 +645,7 @@ static FUNC_UNUSED obj_udata *obj_udata_toobj(lua_State *L, int _index) {
+ 		luaL_typerror(L, _index, "userdata"); /* is not a userdata value. */
+ 	}
+ 	/* verify userdata size. */
+-	len = lua_objlen(L, _index);
++	len = lua_rawlen(L, _index);
+ 	if(len != sizeof(obj_udata)) {
+ 		/* This shouldn't be possible */
+ 		luaL_error(L, "invalid userdata size: size=%d, expected=%d", len, sizeof(obj_udata));
+@@ -1007,9 +1061,9 @@ static FUNC_UNUSED void *obj_simple_udata_luapush(lua_State *L, void *obj, int s
+ /* default simple object equal method. */
+ static FUNC_UNUSED int obj_simple_udata_default_equal(lua_State *L) {
+ 	void *ud1 = obj_simple_udata_toobj(L, 1);
+-	size_t len1 = lua_objlen(L, 1);
++	size_t len1 = lua_rawlen(L, 1);
+ 	void *ud2 = obj_simple_udata_toobj(L, 2);
+-	size_t len2 = lua_objlen(L, 2);
++	size_t len2 = lua_rawlen(L, 2);
+ 
+ 	if(len1 == len2) {
+ 		lua_pushboolean(L, (memcmp(ud1, ud2, len1) == 0));
+@@ -1088,12 +1142,12 @@ static void obj_type_register_constants(lua_State *L, const obj_const *constants
+ }
+ 
+ static void obj_type_register_package(lua_State *L, const reg_sub_module *type_reg) {
+-	const luaL_reg *reg_list = type_reg->pub_funcs;
++	const luaL_Reg *reg_list = type_reg->pub_funcs;
+ 
+ 	/* create public functions table. */
+ 	if(reg_list != NULL && reg_list[0].name != NULL) {
+ 		/* register functions */
+-		luaL_register(L, NULL, reg_list);
++		luaL_setfuncs(L, reg_list, 0);
+ 	}
+ 
+ 	obj_type_register_constants(L, type_reg->constants, -1, type_reg->bidirectional_consts);
+@@ -1102,23 +1156,23 @@ static void obj_type_register_package(lua_State *L, const reg_sub_module *type_r
+ }
+ 
+ static void obj_type_register_meta(lua_State *L, const reg_sub_module *type_reg) {
+-	const luaL_reg *reg_list;
++	const luaL_Reg *reg_list;
+ 
+ 	/* create public functions table. */
+ 	reg_list = type_reg->pub_funcs;
+ 	if(reg_list != NULL && reg_list[0].name != NULL) {
+ 		/* register functions */
+-		luaL_register(L, NULL, reg_list);
++		luaL_setfuncs(L, reg_list, 0);
+ 	}
+ 
+ 	obj_type_register_constants(L, type_reg->constants, -1, type_reg->bidirectional_consts);
+ 
+ 	/* register methods. */
+-	luaL_register(L, NULL, type_reg->methods);
++	luaL_setfuncs(L, type_reg->methods, 0);
+ 
+ 	/* create metatable table. */
+ 	lua_newtable(L);
+-	luaL_register(L, NULL, type_reg->metas); /* fill metatable */
++	luaL_setfuncs(L, type_reg->metas, 0); /* fill metatable */
+ 	/* setmetatable on meta-object. */
+ 	lua_setmetatable(L, -2);
+ 
+@@ -1126,7 +1180,7 @@ static void obj_type_register_meta(lua_State *L, const reg_sub_module *type_reg)
+ }
+ 
+ static void obj_type_register(lua_State *L, const reg_sub_module *type_reg, int priv_table) {
+-	const luaL_reg *reg_list;
++	const luaL_Reg *reg_list;
+ 	obj_type *type = type_reg->type;
+ 	const obj_base *base = type_reg->bases;
+ 
+@@ -1143,7 +1197,7 @@ static void obj_type_register(lua_State *L, const reg_sub_module *type_reg, int
+ 	reg_list = type_reg->pub_funcs;
+ 	if(reg_list != NULL && reg_list[0].name != NULL) {
+ 		/* register "constructors" as to object's public API */
+-		luaL_register(L, NULL, reg_list); /* fill public API table. */
++		luaL_setfuncs(L, reg_list, 0); /* fill public API table. */
+ 
+ 		/* make public API table callable as the default constructor. */
+ 		lua_newtable(L); /* create metatable */
+@@ -1173,7 +1227,7 @@ static void obj_type_register(lua_State *L, const reg_sub_module *type_reg, int
+ #endif
+ 	}
+ 
+-	luaL_register(L, NULL, type_reg->methods); /* fill methods table. */
++	luaL_setfuncs(L, type_reg->methods, 0); /* fill methods table. */
+ 
+ 	luaL_newmetatable(L, type->name); /* create metatable */
+ 	lua_pushliteral(L, ".name");
+@@ -1191,7 +1245,7 @@ static void obj_type_register(lua_State *L, const reg_sub_module *type_reg, int
+ 	lua_pushvalue(L, -2); /* dup metatable. */
+ 	lua_rawset(L, priv_table);    /* priv_table["<object_name>"] = metatable */
+ 
+-	luaL_register(L, NULL, type_reg->metas); /* fill metatable */
++	luaL_setfuncs(L, type_reg->metas, 0); /* fill metatable */
+ 
+ 	/* add obj_bases to metatable. */
+ 	while(base->id >= 0) {
+@@ -1348,7 +1402,7 @@ static FUNC_UNUSED void *nobj_delete_callback_state(lua_State *L, int owner_idx)
+ #define ERROR_LEN 1024
+ 
+ /******************************************************************************
+-* traceback() function from Lua 5.1.x source.
++* traceback() function from Lua 5.1/5.2 source.
+ * Copyright (C) 1994-2008 Lua.org, PUC-Rio.  All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+@@ -1370,10 +1424,12 @@ static FUNC_UNUSED void *nobj_delete_callback_state(lua_State *L, int owner_idx)
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ ******************************************************************************/
++#if !defined(LUA_VERSION_NUM) || (LUA_VERSION_NUM == 501)
++/* from Lua 5.1 */
+ static int traceback (lua_State *L) {
+   if (!lua_isstring(L, 1))  /* 'message' not a string? */
+     return 1;  /* keep it intact */
+-  lua_getfield(L, LUA_GLOBALSINDEX, "debug");
++  lua_getglobal(L, "debug");
+   if (!lua_istable(L, -1)) {
+     lua_pop(L, 1);
+     return 1;
+@@ -1388,6 +1444,19 @@ static int traceback (lua_State *L) {
+   lua_call(L, 2, 1);  /* call debug.traceback */
+   return 1;
+ }
++#else
++/* from Lua 5.2 */
++static int traceback (lua_State *L) {
++  const char *msg = lua_tostring(L, 1);
++  if (msg)
++    luaL_traceback(L, L, msg, 1);
++  else if (!lua_isnoneornil(L, 1)) {  /* is there an error object? */
++    if (!luaL_callmeta(L, 1, "__tostring"))  /* try its 'tostring' metamethod */
++      lua_pushliteral(L, "(no error message)");
++  }
++  return 1;
++}
++#endif
+ 
+ static Lua_LLThread_child *llthread_child_new() {
+ 	Lua_LLThread_child *this;
+@@ -1831,17 +1900,17 @@ static int llthreads__new__func(lua_State *L) {
+ 
+ 
+ 
+-static const luaL_reg obj_Lua_LLThread_pub_funcs[] = {
++static const luaL_Reg obj_Lua_LLThread_pub_funcs[] = {
+   {NULL, NULL}
+ };
+ 
+-static const luaL_reg obj_Lua_LLThread_methods[] = {
++static const luaL_Reg obj_Lua_LLThread_methods[] = {
+   {"start", Lua_LLThread__start__meth},
+   {"join", Lua_LLThread__join__meth},
+   {NULL, NULL}
+ };
+ 
+-static const luaL_reg obj_Lua_LLThread_metas[] = {
++static const luaL_Reg obj_Lua_LLThread_metas[] = {
+   {"__gc", Lua_LLThread__delete__meth},
+   {"__tostring", obj_udata_default_tostring},
+   {"__eq", obj_udata_default_equal},
+@@ -1864,7 +1933,7 @@ static int llthreads__new__func(lua_State *L) {
+   {NULL, NULL}
+ };
+ 
+-static const luaL_reg llthreads_function[] = {
++static const luaL_Reg llthreads_function[] = {
+   {"new", llthreads__new__func},
+   {NULL, NULL}
+ };
+@@ -1941,7 +2010,7 @@ LUA_NOBJ_API int luaopen_llthreads(lua_State *L) {
+ 	luaL_register(L, "llthreads", llthreads_function);
+ #else
+ 	lua_newtable(L);
+-	luaL_register(L, NULL, llthreads_function);
++	luaL_setfuncs(L, llthreads_function, 0);
+ #endif
+ 
+ 	/* register module constants. */
+diff --git a/src/thread.nobj.lua b/src/thread.nobj.lua
+index 8d4ef54..626022f 100644
+--- a/src/thread.nobj.lua
++++ b/src/thread.nobj.lua
+@@ -59,7 +59,7 @@ typedef struct Lua_LLThread {
+ #define ERROR_LEN 1024
+ 
+ /******************************************************************************
+-* traceback() function from Lua 5.1.x source.
++* traceback() function from Lua 5.1/5.2 source.
+ * Copyright (C) 1994-2008 Lua.org, PUC-Rio.  All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+@@ -81,10 +81,12 @@ typedef struct Lua_LLThread {
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ ******************************************************************************/
++#if !defined(LUA_VERSION_NUM) || (LUA_VERSION_NUM == 501)
++/* from Lua 5.1 */
+ static int traceback (lua_State *L) {
+   if (!lua_isstring(L, 1))  /* 'message' not a string? */
+     return 1;  /* keep it intact */
+-  lua_getfield(L, LUA_GLOBALSINDEX, "debug");
++  lua_getglobal(L, "debug");
+   if (!lua_istable(L, -1)) {
+     lua_pop(L, 1);
+     return 1;
+@@ -99,6 +101,19 @@ static int traceback (lua_State *L) {
+   lua_call(L, 2, 1);  /* call debug.traceback */
+   return 1;
+ }
++#else
++/* from Lua 5.2 */
++static int traceback (lua_State *L) {
++  const char *msg = lua_tostring(L, 1);
++  if (msg)
++    luaL_traceback(L, L, msg, 1);
++  else if (!lua_isnoneornil(L, 1)) {  /* is there an error object? */
++    if (!luaL_callmeta(L, 1, "__tostring"))  /* try its 'tostring' metamethod */
++      lua_pushliteral(L, "(no error message)");
++  }
++  return 1;
++}
++#endif
+ 
+ static Lua_LLThread_child *llthread_child_new() {
+ 	Lua_LLThread_child *this;
+-- 
+1.8.1.6
+