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authorRoberto Ierusalimschy <roberto@inf.puc-rio.br>2010-08-03 17:21:16 -0300
committerRoberto Ierusalimschy <roberto@inf.puc-rio.br>2010-08-03 17:21:16 -0300
commitcd6c276e412227c57c36679692b93ac57bfd5562 (patch)
treef49c710d21174ea7927f145911563157f80fe204
parentfd4b4a2a68992259ffd91299f68b41de4759d8f0 (diff)
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use index 0 for header of list of free references
-rw-r--r--lauxlib.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/lauxlib.c b/lauxlib.c
index 7179507a..f8644878 100644
--- a/lauxlib.c
+++ b/lauxlib.c
@@ -1,5 +1,5 @@
1/* 1/*
2** $Id: lauxlib.c,v 1.218 2010/07/02 12:01:53 roberto Exp roberto $ 2** $Id: lauxlib.c,v 1.219 2010/07/28 15:51:59 roberto Exp roberto $
3** Auxiliary functions for building Lua libraries 3** Auxiliary functions for building Lua libraries
4** See Copyright Notice in lua.h 4** See Copyright Notice in lua.h
5*/ 5*/
@@ -434,7 +434,7 @@ LUALIB_API char *luaL_buffinitsize (lua_State *L, luaL_Buffer *B, size_t sz) {
434*/ 434*/
435 435
436/* index of free-list header */ 436/* index of free-list header */
437#define freelist "lua-freelist" 437#define freelist 0
438 438
439 439
440LUALIB_API int luaL_ref (lua_State *L, int t) { 440LUALIB_API int luaL_ref (lua_State *L, int t) {
@@ -444,12 +444,12 @@ LUALIB_API int luaL_ref (lua_State *L, int t) {
444 lua_pop(L, 1); /* remove from stack */ 444 lua_pop(L, 1); /* remove from stack */
445 return LUA_REFNIL; /* `nil' has a unique fixed reference */ 445 return LUA_REFNIL; /* `nil' has a unique fixed reference */
446 } 446 }
447 lua_getfield(L, t, freelist); /* get first free element */ 447 lua_rawgeti(L, t, freelist); /* get first free element */
448 ref = (int)lua_tointeger(L, -1); /* ref = t[FREELIST_REF] */ 448 ref = (int)lua_tointeger(L, -1); /* ref = t[freelist] */
449 lua_pop(L, 1); /* remove it from stack */ 449 lua_pop(L, 1); /* remove it from stack */
450 if (ref != 0) { /* any free element? */ 450 if (ref != 0) { /* any free element? */
451 lua_rawgeti(L, t, ref); /* remove it from list */ 451 lua_rawgeti(L, t, ref); /* remove it from list */
452 lua_setfield(L, t, freelist); /* (t[freelist] = t[ref]) */ 452 lua_rawseti(L, t, freelist); /* (t[freelist] = t[ref]) */
453 } 453 }
454 else /* no free elements */ 454 else /* no free elements */
455 ref = (int)lua_rawlen(L, t) + 1; /* get a new reference */ 455 ref = (int)lua_rawlen(L, t) + 1; /* get a new reference */
@@ -461,10 +461,10 @@ LUALIB_API int luaL_ref (lua_State *L, int t) {
461LUALIB_API void luaL_unref (lua_State *L, int t, int ref) { 461LUALIB_API void luaL_unref (lua_State *L, int t, int ref) {
462 if (ref >= 0) { 462 if (ref >= 0) {
463 t = lua_absindex(L, t); 463 t = lua_absindex(L, t);
464 lua_getfield(L, t, freelist); 464 lua_rawgeti(L, t, freelist);
465 lua_rawseti(L, t, ref); /* t[ref] = t[freelist] */ 465 lua_rawseti(L, t, ref); /* t[ref] = t[freelist] */
466 lua_pushinteger(L, ref); 466 lua_pushinteger(L, ref);
467 lua_setfield(L, t, freelist); /* t[freelist] = ref */ 467 lua_rawseti(L, t, freelist); /* t[freelist] = ref */
468 } 468 }
469} 469}
470 470