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detail (setmetatable do not need to use a back GC barrier)

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This commit is contained in:
Roberto Ierusalimschy
2013-09-11 17:15:31 -03:00
parent 2e2c109daf
commit 06156e7575
2 changed files with 3 additions and 7 deletions
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4
lapi.c
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@@ -1,5 +1,5 @@
/* /*
** $Id: lapi.c,v 2.187 2013/08/16 18:55:49 roberto Exp roberto $ ** $Id: lapi.c,v 2.188 2013/08/27 18:53:35 roberto Exp roberto $
** Lua API ** Lua API
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@@ -849,7 +849,7 @@ LUA_API int lua_setmetatable (lua_State *L, int objindex) {
case LUA_TTABLE: { case LUA_TTABLE: {
hvalue(obj)->metatable = mt; hvalue(obj)->metatable = mt;
if (mt) { if (mt) {
luaC_objbarrierback(L, gcvalue(obj), mt); luaC_objbarrier(L, gcvalue(obj), mt);
luaC_checkfinalizer(L, gcvalue(obj), mt); luaC_checkfinalizer(L, gcvalue(obj), mt);
} }
break; break;

6
lgc.h
View File

@@ -1,5 +1,5 @@
/* /*
** $Id: lgc.h,v 2.74 2013/09/11 14:09:55 roberto Exp roberto $ ** $Id: lgc.h,v 2.75 2013/09/11 14:47:08 roberto Exp roberto $
** Garbage Collector ** Garbage Collector
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@@ -128,10 +128,6 @@
if (nolocal(obj2gco(o)), isblack(obj2gco(p)) && iswhite(obj2gco(o))) \ if (nolocal(obj2gco(o)), isblack(obj2gco(p)) && iswhite(obj2gco(o))) \
luaC_barrier_(L,obj2gco(p),obj2gco(o)); } luaC_barrier_(L,obj2gco(p),obj2gco(o)); }
#define luaC_objbarrierback(L,p,o) \
{ if (nolocal(obj2gco(o)), isblack(obj2gco(p)) && iswhite(obj2gco(o))) \
luaC_barrierback_(L,obj2gco(p)); }
#define luaC_upvalbarrier(L,uv) \ #define luaC_upvalbarrier(L,uv) \
{ if (iscollectable((uv)->v) && !upisopen(uv)) \ { if (iscollectable((uv)->v) && !upisopen(uv)) \
luaC_upvalbarrier_(L,uv); } luaC_upvalbarrier_(L,uv); }