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Bug 559256 - optimize slot grow/shrink (r=gal)

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--HG--
extra : rebase_source : d979d305f730ee2fca3cf5fd0b5eeed028da1b66
This commit is contained in:
Luke Wagner 2010-04-19 14:42:04 -07:00
parent e292b1f5dc
commit b5cd1b96c8
1 changed files with 6 additions and 1 deletions
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7
js/src/jsobj.cpp
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@ -3587,7 +3587,7 @@ js_AllocSlots(JSContext *cx, JSObject *obj, size_t nslots)
jsval* slots;
slots = (jsval*) cx->malloc(SLOTS_TO_DYNAMIC_WORDS(nslots) * sizeof(jsval));
if (!slots)
return true;
return false;
*slots++ = nslots;
/* clear the newly allocated cells. */
@ -3644,6 +3644,9 @@ js_GrowSlots(JSContext *cx, JSObject *obj, size_t nslots)
size_t oslots = size_t(slots[-1]);
slots = (jsval*) cx->realloc(slots - 1, nwords * sizeof(jsval));
if (!slots)
return false;
*slots++ = nslots;
obj->dslots = slots;
@ -3673,6 +3676,8 @@ js_ShrinkSlots(JSContext *cx, JSObject *obj, size_t nslots)
} else {
size_t nwords = SLOTS_TO_DYNAMIC_WORDS(nslots);
slots = (jsval*) cx->realloc(slots - 1, nwords * sizeof(jsval));
if (!slots)
return; /* Leave obj->dslots at its old size. */
*slots++ = nslots;
obj->dslots = slots;
}