1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/dom/base/nsWrapperCacheInlines.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,61 @@
1.4 +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef nsWrapperCacheInline_h___
1.10 +#define nsWrapperCacheInline_h___
1.11 +
1.12 +#include "nsWrapperCache.h"
1.13 +#include "js/GCAPI.h"
1.14 +#include "js/TracingAPI.h"
1.15 +
1.16 +inline JSObject*
1.17 +nsWrapperCache::GetWrapper() const
1.18 +{
1.19 + JSObject* obj = GetWrapperPreserveColor();
1.20 + if (obj) {
1.21 + JS::ExposeObjectToActiveJS(obj);
1.22 + }
1.23 + return obj;
1.24 +}
1.25 +
1.26 +inline bool
1.27 +nsWrapperCache::IsBlack()
1.28 +{
1.29 + JSObject* o = GetWrapperPreserveColor();
1.30 + return o && !JS::GCThingIsMarkedGray(o);
1.31 +}
1.32 +
1.33 +static void
1.34 +SearchGray(void* aGCThing, const char* aName, void* aClosure)
1.35 +{
1.36 + bool* hasGrayObjects = static_cast<bool*>(aClosure);
1.37 + if (!*hasGrayObjects && aGCThing && JS::GCThingIsMarkedGray(aGCThing)) {
1.38 + *hasGrayObjects = true;
1.39 + }
1.40 +}
1.41 +
1.42 +inline bool
1.43 +nsWrapperCache::HasNothingToTrace(nsISupports* aThis)
1.44 +{
1.45 + nsXPCOMCycleCollectionParticipant* participant = nullptr;
1.46 + CallQueryInterface(aThis, &participant);
1.47 + bool hasGrayObjects = false;
1.48 + participant->Trace(aThis, TraceCallbackFunc(SearchGray), &hasGrayObjects);
1.49 + return !hasGrayObjects;
1.50 +}
1.51 +
1.52 +inline bool
1.53 +nsWrapperCache::IsBlackAndDoesNotNeedTracing(nsISupports* aThis)
1.54 +{
1.55 + return IsBlack() && HasNothingToTrace(aThis);
1.56 +}
1.57 +
1.58 +inline void
1.59 +nsWrapperCache::TraceWrapperJSObject(JSTracer* aTrc, const char* aName)
1.60 +{
1.61 + JS_CallHeapObjectTracer(aTrc, &mWrapper, aName);
1.62 +}
1.63 +
1.64 +#endif /* nsWrapperCache_h___ */
