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Avoid unnecessary dynamic allocation when calling script functions.

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Use tracer instead of rooting in ValueCloner, to avoid memory
allocations.

This was SVN commit r7770.
This commit is contained in:
Ykkrosh
2010-07-19 23:03:33 +00:00
parent 9674c3c0fe
commit c4350d86de
4 changed files with 46 additions and 48 deletions
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source/scriptinterface/ScriptInterface.cpp
+12 -20
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@@ -426,17 +426,11 @@ jsval ScriptInterface::CallConstructor(jsval ctor)
bool ScriptInterface::CallFunctionVoid(jsval val, const char* name)
{
jsval jsRet;
std::vector<jsval> argv;
return CallFunction_(val, name, argv, jsRet);
return CallFunction_(val, name, 0, NULL, jsRet);
}
bool ScriptInterface::CallFunction_(jsval val, const char* name, std::vector<jsval>& args, jsval& ret)
bool ScriptInterface::CallFunction_(jsval val, const char* name, size_t argc, jsval* argv, jsval& ret)
{
const uintN argc = args.size();
jsval* argv = NULL;
if (argc)
argv = &args[0];
JSObject* obj;
if (!JS_ValueToObject(m->m_cx, val, &obj) || obj == NULL)
return false;
@@ -668,7 +662,8 @@ void ScriptInterface::DumpHeap()
class ValueCloner
{
public:
ValueCloner(JSContext* cxFrom, JSContext* cxTo) : cxFrom(cxFrom), cxTo(cxTo)
ValueCloner(ScriptInterface& from, ScriptInterface& to) :
cxFrom(from.GetContext()), cxTo(to.GetContext()), m_RooterFrom(from), m_RooterTo(to)
{
}
@@ -682,7 +677,7 @@ public:
if (it != m_Mapping.end())
return it->second;
m_ValuesOld.push_back(CScriptValRooted(cxFrom, val)); // root it so our mapping doesn't get invalidated
m_RooterFrom.Push(val); // root it so our mapping doesn't get invalidated
return Clone(val);
}
@@ -699,7 +694,7 @@ private:
jsval rval;
CLONE_REQUIRE(JS_NewNumberValue(cxTo, *JSVAL_TO_DOUBLE(val), &rval), L"JS_NewNumberValue");
m_Mapping[val] = rval;
m_ValuesNew.push_back(CScriptValRooted(cxTo, rval));
m_RooterTo.Push(rval);
return rval;
}
@@ -709,7 +704,7 @@ private:
CLONE_REQUIRE(str, L"JS_NewUCStringCopyN");
jsval rval = STRING_TO_JSVAL(str);
m_Mapping[val] = rval;
m_ValuesNew.push_back(CScriptValRooted(cxTo, rval));
m_RooterTo.Push(rval);
return rval;
}
@@ -730,7 +725,7 @@ private:
}
m_Mapping[val] = OBJECT_TO_JSVAL(newObj);
m_ValuesNew.push_back(CScriptValRooted(cxTo, OBJECT_TO_JSVAL(newObj)));
m_RooterTo.Push(newObj);
JSIdArray* ida = JS_Enumerate(cxFrom, JSVAL_TO_OBJECT(val));
CLONE_REQUIRE(ida, L"JS_Enumerate");
@@ -769,17 +764,14 @@ private:
JSContext* cxFrom;
JSContext* cxTo;
std::map<jsval, jsval> m_Mapping;
std::deque<CScriptValRooted> m_ValuesOld;
std::deque<CScriptValRooted> m_ValuesNew;
AutoGCRooter m_RooterFrom;
AutoGCRooter m_RooterTo;
};
jsval ScriptInterface::CloneValueFromOtherContext(const ScriptInterface& otherContext, jsval val)
jsval ScriptInterface::CloneValueFromOtherContext(ScriptInterface& otherContext, jsval val)
{
PROFILE("CloneValueFromOtherContext");
JSContext* cxTo = GetContext();
JSContext* cxFrom = otherContext.GetContext();
ValueCloner cloner(cxFrom, cxTo);
ValueCloner cloner(otherContext, *this);
return cloner.GetOrClone(val);
}