michael@0: /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef nsWrapperCacheInline_h___
michael@0: #define nsWrapperCacheInline_h___
michael@0: 
michael@0: #include "nsWrapperCache.h"
michael@0: #include "js/GCAPI.h"
michael@0: #include "js/TracingAPI.h"
michael@0: 
michael@0: inline JSObject*
michael@0: nsWrapperCache::GetWrapper() const
michael@0: {
michael@0:     JSObject* obj = GetWrapperPreserveColor();
michael@0:     if (obj) {
michael@0:       JS::ExposeObjectToActiveJS(obj);
michael@0:     }
michael@0:     return obj;
michael@0: }
michael@0: 
michael@0: inline bool
michael@0: nsWrapperCache::IsBlack()
michael@0: {
michael@0:   JSObject* o = GetWrapperPreserveColor();
michael@0:   return o && !JS::GCThingIsMarkedGray(o);
michael@0: }
michael@0: 
michael@0: static void
michael@0: SearchGray(void* aGCThing, const char* aName, void* aClosure)
michael@0: {
michael@0:   bool* hasGrayObjects = static_cast<bool*>(aClosure);
michael@0:   if (!*hasGrayObjects && aGCThing && JS::GCThingIsMarkedGray(aGCThing)) {
michael@0:     *hasGrayObjects = true;
michael@0:   }
michael@0: }
michael@0: 
michael@0: inline bool
michael@0: nsWrapperCache::HasNothingToTrace(nsISupports* aThis)
michael@0: {
michael@0:   nsXPCOMCycleCollectionParticipant* participant = nullptr;
michael@0:   CallQueryInterface(aThis, &participant);
michael@0:   bool hasGrayObjects = false;
michael@0:   participant->Trace(aThis, TraceCallbackFunc(SearchGray), &hasGrayObjects);
michael@0:   return !hasGrayObjects;
michael@0: }
michael@0: 
michael@0: inline bool
michael@0: nsWrapperCache::IsBlackAndDoesNotNeedTracing(nsISupports* aThis)
michael@0: {
michael@0:   return IsBlack() && HasNothingToTrace(aThis);
michael@0: }
michael@0: 
michael@0: inline void
michael@0: nsWrapperCache::TraceWrapperJSObject(JSTracer* aTrc, const char* aName)
michael@0: {
michael@0:   JS_CallHeapObjectTracer(aTrc, &mWrapper, aName);
michael@0: }
michael@0: 
michael@0: #endif /* nsWrapperCache_h___ */