diff options
Diffstat (limited to 'xpcom/glue')
| -rw-r--r-- | xpcom/glue/nsCycleCollectionParticipant.h | 45 |
1 files changed, 32 insertions, 13 deletions
diff --git a/xpcom/glue/nsCycleCollectionParticipant.h b/xpcom/glue/nsCycleCollectionParticipant.h index 2dfbb6750..5d03acd26 100644 --- a/xpcom/glue/nsCycleCollectionParticipant.h +++ b/xpcom/glue/nsCycleCollectionParticipant.h @@ -113,11 +113,38 @@ private: class NS_NO_VTABLE nsCycleCollectionParticipant { public: - constexpr nsCycleCollectionParticipant() : mMightSkip(false) {} - constexpr explicit nsCycleCollectionParticipant(bool aSkip) : mMightSkip(aSkip) {} + constexpr nsCycleCollectionParticipant() + : mMightSkip(false) + , mTraverseShouldTrace(false) + { + } + + constexpr explicit nsCycleCollectionParticipant(bool aSkip, + bool aTraverseShouldTrace = false) + : mMightSkip(aSkip) + , mTraverseShouldTrace(aTraverseShouldTrace) + { + } NS_IMETHOD Traverse(void* aPtr, nsCycleCollectionTraversalCallback& aCb) = 0; + nsresult TraverseNativeAndJS(void* aPtr, + nsCycleCollectionTraversalCallback& aCb) + { + nsresult rv = Traverse(aPtr, aCb); + if (mTraverseShouldTrace) { + // Note, we always call Trace, even if Traverse returned + // NS_SUCCESS_INTERRUPTED_TRAVERSE. + TraceCallbackFunc noteJsChild(&nsCycleCollectionParticipant::NoteJSChild); + Trace(aPtr, noteJsChild, &aCb); + } + return rv; + } + + // Implemented in nsCycleCollectorTraceJSHelpers.cpp. + static void NoteJSChild(JS::GCCellPtr aGCThing, const char* aName, + void* aClosure); + NS_IMETHOD_(void) Root(void* aPtr) = 0; NS_IMETHOD_(void) Unlink(void* aPtr) = 0; NS_IMETHOD_(void) Unroot(void* aPtr) = 0; @@ -172,26 +199,24 @@ protected: private: const bool mMightSkip; + const bool mTraverseShouldTrace; }; class NS_NO_VTABLE nsScriptObjectTracer : public nsCycleCollectionParticipant { public: constexpr nsScriptObjectTracer() - : nsCycleCollectionParticipant(false) + : nsCycleCollectionParticipant(false, true) { } constexpr explicit nsScriptObjectTracer(bool aSkip) - : nsCycleCollectionParticipant(aSkip) + : nsCycleCollectionParticipant(aSkip, true) { } NS_IMETHOD_(void) Trace(void* aPtr, const TraceCallbacks& aCb, void* aClosure) override = 0; - // Implemented in nsCycleCollectorTraceJSHelpers.cpp. - static void NoteJSChild(JS::GCCellPtr aGCThing, const char* aName, - void* aClosure); }; class NS_NO_VTABLE nsXPCOMCycleCollectionParticipant : public nsScriptObjectTracer @@ -440,12 +465,6 @@ DowncastCCParticipant(void* aPtr) #define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_RAWPTR(_field) \ CycleCollectionNoteChild(cb, tmp->_field, #_field); -#define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS \ - { \ - TraceCallbackFunc noteJsChild(&nsScriptObjectTracer::NoteJSChild); \ - Trace(p, noteJsChild, &cb); \ - } - #define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END \ (void)tmp; \ return NS_OK; \ |