mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-09-11 02:56:06 +00:00
844 lines
45 KiB
C++
844 lines
45 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsCycleCollectionParticipant_h__
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#define nsCycleCollectionParticipant_h__
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#include "mozilla/MacroArgs.h"
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#include "mozilla/MacroForEach.h"
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#include "nsCycleCollectionNoteChild.h"
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#include "js/RootingAPI.h"
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#define NS_XPCOMCYCLECOLLECTIONPARTICIPANT_IID \
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{ \
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0x9674489b, \
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0x1f6f, \
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0x4550, \
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{ 0xa7, 0x30, 0xcc, 0xae, 0xdd, 0x10, 0x4c, 0xf9 } \
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}
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/**
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* Special IID to get at the base nsISupports for a class. Usually this is the
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* canonical nsISupports pointer, but in the case of tearoffs for example it is
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* the base nsISupports pointer of the tearoff. This allow the cycle collector
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* to have separate nsCycleCollectionParticipant's for tearoffs or aggregated
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* classes.
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*/
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#define NS_CYCLECOLLECTIONISUPPORTS_IID \
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{ \
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0xc61eac14, \
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0x5f7a, \
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0x4481, \
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{ 0x96, 0x5e, 0x7e, 0xaa, 0x6e, 0xff, 0xa8, 0x5f } \
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}
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/**
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* Just holds the IID so NS_GET_IID works.
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*/
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class nsCycleCollectionISupports
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{
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public:
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_CYCLECOLLECTIONISUPPORTS_IID)
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(nsCycleCollectionISupports,
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NS_CYCLECOLLECTIONISUPPORTS_IID)
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namespace JS {
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template<class T> class Heap;
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} /* namespace JS */
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/*
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* A struct defining pure virtual methods which are called when tracing cycle
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* collection paticipants. The appropriate method is called depending on the
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* type of JS GC thing.
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*/
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struct TraceCallbacks
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{
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virtual void Trace(JS::Heap<JS::Value>* aPtr, const char* aName,
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void* aClosure) const = 0;
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virtual void Trace(JS::Heap<jsid>* aPtr, const char* aName,
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void* aClosure) const = 0;
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virtual void Trace(JS::Heap<JSObject*>* aPtr, const char* aName,
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void* aClosure) const = 0;
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virtual void Trace(JS::TenuredHeap<JSObject*>* aPtr, const char* aName,
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void* aClosure) const = 0;
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virtual void Trace(JS::Heap<JSString*>* aPtr, const char* aName,
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void* aClosure) const = 0;
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virtual void Trace(JS::Heap<JSScript*>* aPtr, const char* aName,
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void* aClosure) const = 0;
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virtual void Trace(JS::Heap<JSFunction*>* aPtr, const char* aName,
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void* aClosure) const = 0;
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};
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/*
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* An implementation of TraceCallbacks that calls a single function for all JS
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* GC thing types encountered.
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*/
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struct TraceCallbackFunc : public TraceCallbacks
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{
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typedef void (*Func)(JS::GCCellPtr aPtr, const char* aName, void* aClosure);
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explicit TraceCallbackFunc(Func aCb) : mCallback(aCb) {}
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virtual void Trace(JS::Heap<JS::Value>* aPtr, const char* aName,
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void* aClosure) const override;
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virtual void Trace(JS::Heap<jsid>* aPtr, const char* aName,
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void* aClosure) const override;
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virtual void Trace(JS::Heap<JSObject*>* aPtr, const char* aName,
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void* aClosure) const override;
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virtual void Trace(JS::TenuredHeap<JSObject*>* aPtr, const char* aName,
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void* aClosure) const override;
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virtual void Trace(JS::Heap<JSString*>* aPtr, const char* aName,
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void* aClosure) const override;
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virtual void Trace(JS::Heap<JSScript*>* aPtr, const char* aName,
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void* aClosure) const override;
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virtual void Trace(JS::Heap<JSFunction*>* aPtr, const char* aName,
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void* aClosure) const override;
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private:
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Func mCallback;
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};
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/**
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* Participant implementation classes
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*/
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class NS_NO_VTABLE nsCycleCollectionParticipant
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{
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public:
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MOZ_CONSTEXPR nsCycleCollectionParticipant() : mMightSkip(false) {}
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MOZ_CONSTEXPR explicit nsCycleCollectionParticipant(bool aSkip) : mMightSkip(aSkip) {}
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NS_IMETHOD Traverse(void* aPtr, nsCycleCollectionTraversalCallback& aCb) = 0;
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NS_IMETHOD_(void) Root(void* aPtr) = 0;
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NS_IMETHOD_(void) Unlink(void* aPtr) = 0;
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NS_IMETHOD_(void) Unroot(void* aPtr) = 0;
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NS_IMETHOD_(void) Trace(void* aPtr, const TraceCallbacks& aCb,
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void* aClosure) {}
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// If CanSkip returns true, p is removed from the purple buffer during
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// a call to nsCycleCollector_forgetSkippable().
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// Note, calling CanSkip may remove objects from the purple buffer!
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// If aRemovingAllowed is true, p can be removed from the purple buffer.
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bool CanSkip(void* aPtr, bool aRemovingAllowed)
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{
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return mMightSkip ? CanSkipReal(aPtr, aRemovingAllowed) : false;
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}
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// If CanSkipInCC returns true, p is skipped when selecting roots for the
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// cycle collector graph.
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// Note, calling CanSkipInCC may remove other objects from the purple buffer!
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bool CanSkipInCC(void* aPtr)
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{
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return mMightSkip ? CanSkipInCCReal(aPtr) : false;
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}
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// If CanSkipThis returns true, p is not added to the graph.
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// This method is called during cycle collection, so don't
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// change the state of any objects!
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bool CanSkipThis(void* aPtr)
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{
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return mMightSkip ? CanSkipThisReal(aPtr) : false;
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}
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NS_IMETHOD_(void) DeleteCycleCollectable(void* aPtr) = 0;
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protected:
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NS_IMETHOD_(bool) CanSkipReal(void* aPtr, bool aRemovingAllowed)
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{
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NS_ASSERTION(false, "Forgot to implement CanSkipReal?");
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return false;
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}
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NS_IMETHOD_(bool) CanSkipInCCReal(void* aPtr)
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{
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NS_ASSERTION(false, "Forgot to implement CanSkipInCCReal?");
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return false;
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}
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NS_IMETHOD_(bool) CanSkipThisReal(void* aPtr)
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{
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NS_ASSERTION(false, "Forgot to implement CanSkipThisReal?");
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return false;
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}
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private:
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const bool mMightSkip;
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};
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class NS_NO_VTABLE nsScriptObjectTracer : public nsCycleCollectionParticipant
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{
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public:
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MOZ_CONSTEXPR nsScriptObjectTracer()
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: nsCycleCollectionParticipant(false)
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{
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}
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MOZ_CONSTEXPR explicit nsScriptObjectTracer(bool aSkip)
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: nsCycleCollectionParticipant(aSkip)
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{
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}
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NS_IMETHOD_(void) Trace(void* aPtr, const TraceCallbacks& aCb,
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void* aClosure) override = 0;
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static void NoteJSChild(JS::GCCellPtr aGCThing, const char* aName,
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void* aClosure);
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};
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class NS_NO_VTABLE nsXPCOMCycleCollectionParticipant : public nsScriptObjectTracer
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{
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public:
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MOZ_CONSTEXPR nsXPCOMCycleCollectionParticipant()
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: nsScriptObjectTracer(false)
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{
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}
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MOZ_CONSTEXPR explicit nsXPCOMCycleCollectionParticipant(bool aSkip)
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: nsScriptObjectTracer(aSkip)
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{
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}
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_XPCOMCYCLECOLLECTIONPARTICIPANT_IID)
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NS_IMETHOD_(void) Root(void* aPtr) override;
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NS_IMETHOD_(void) Unroot(void* aPtr) override;
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NS_IMETHOD_(void) Trace(void* aPtr, const TraceCallbacks& aCb,
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void* aClosure) override;
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static bool CheckForRightISupports(nsISupports* aSupports);
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(nsXPCOMCycleCollectionParticipant,
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NS_XPCOMCYCLECOLLECTIONPARTICIPANT_IID)
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///////////////////////////////////////////////////////////////////////////////
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// Helpers for implementing a QI to nsXPCOMCycleCollectionParticipant
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///////////////////////////////////////////////////////////////////////////////
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#define NS_CYCLE_COLLECTION_CLASSNAME(_class) \
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_class::NS_CYCLE_COLLECTION_INNERCLASS
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#define NS_IMPL_QUERY_CYCLE_COLLECTION(_class) \
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if ( aIID.Equals(NS_GET_IID(nsXPCOMCycleCollectionParticipant)) ) { \
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*aInstancePtr = NS_CYCLE_COLLECTION_PARTICIPANT(_class); \
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return NS_OK; \
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} else
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#define NS_IMPL_QUERY_CYCLE_COLLECTION_ISUPPORTS(_class) \
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if ( aIID.Equals(NS_GET_IID(nsCycleCollectionISupports)) ) { \
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*aInstancePtr = NS_CYCLE_COLLECTION_CLASSNAME(_class)::Upcast(this); \
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return NS_OK; \
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} else
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#define NS_INTERFACE_MAP_ENTRY_CYCLE_COLLECTION(_class) \
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NS_IMPL_QUERY_CYCLE_COLLECTION(_class)
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#define NS_INTERFACE_MAP_ENTRY_CYCLE_COLLECTION_ISUPPORTS(_class) \
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NS_IMPL_QUERY_CYCLE_COLLECTION_ISUPPORTS(_class)
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#define NS_INTERFACE_MAP_ENTRIES_CYCLE_COLLECTION(_class) \
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NS_INTERFACE_MAP_ENTRY_CYCLE_COLLECTION(_class) \
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NS_INTERFACE_MAP_ENTRY_CYCLE_COLLECTION_ISUPPORTS(_class)
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#define NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(_class) \
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NS_INTERFACE_MAP_BEGIN(_class) \
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NS_INTERFACE_MAP_ENTRIES_CYCLE_COLLECTION(_class)
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#define NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(_class) \
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NS_INTERFACE_MAP_BEGIN(_class) \
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NS_INTERFACE_MAP_ENTRY_CYCLE_COLLECTION(_class)
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#define NS_INTERFACE_TABLE_TO_MAP_SEGUE_CYCLE_COLLECTION(_class) \
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if (rv == NS_OK) return rv; \
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nsISupports* foundInterface; \
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NS_INTERFACE_MAP_ENTRIES_CYCLE_COLLECTION(_class)
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#define NS_INTERFACE_TABLE_HEAD_CYCLE_COLLECTION_INHERITED(_class) \
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NS_IMETHODIMP _class::QueryInterface(REFNSIID aIID, void** aInstancePtr) \
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{ \
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NS_PRECONDITION(aInstancePtr, "null out param"); \
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\
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if ( aIID.Equals(NS_GET_IID(nsXPCOMCycleCollectionParticipant)) ) { \
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*aInstancePtr = NS_CYCLE_COLLECTION_PARTICIPANT(_class); \
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return NS_OK; \
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} \
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nsresult rv;
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#define NS_CYCLE_COLLECTION_UPCAST(obj, clazz) \
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NS_CYCLE_COLLECTION_CLASSNAME(clazz)::Upcast(obj)
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#ifdef DEBUG
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#define NS_CHECK_FOR_RIGHT_PARTICIPANT(_ptr) _ptr->CheckForRightParticipant()
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#else
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#define NS_CHECK_FOR_RIGHT_PARTICIPANT(_ptr)
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#endif
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// The default implementation of this class template is empty, because it
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// should never be used: see the partial specializations below.
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template<typename T,
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bool IsXPCOM = mozilla::IsBaseOf<nsISupports, T>::value>
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struct DowncastCCParticipantImpl
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{
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};
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// Specialization for XPCOM CC participants
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template<typename T>
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struct DowncastCCParticipantImpl<T, true>
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{
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static T* Run(void* aPtr)
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{
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nsISupports* s = static_cast<nsISupports*>(aPtr);
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MOZ_ASSERT(NS_CYCLE_COLLECTION_CLASSNAME(T)::CheckForRightISupports(s),
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"not the nsISupports pointer we expect");
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T* rval = NS_CYCLE_COLLECTION_CLASSNAME(T)::Downcast(s);
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NS_CHECK_FOR_RIGHT_PARTICIPANT(rval);
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return rval;
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}
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};
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// Specialization for native CC participants
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template<typename T>
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struct DowncastCCParticipantImpl<T, false>
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{
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static T* Run(void* aPtr) { return static_cast<T*>(aPtr); }
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};
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template<typename T>
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T*
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DowncastCCParticipant(void* aPtr)
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{
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return DowncastCCParticipantImpl<T>::Run(aPtr);
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}
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///////////////////////////////////////////////////////////////////////////////
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// Helpers for implementing CanSkip methods
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///////////////////////////////////////////////////////////////////////////////
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#define NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_BEGIN(_class) \
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NS_IMETHODIMP_(bool) \
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NS_CYCLE_COLLECTION_CLASSNAME(_class)::CanSkipReal(void *p, \
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bool aRemovingAllowed) \
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{ \
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_class *tmp = DowncastCCParticipant<_class >(p);
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#define NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_END \
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(void)tmp; \
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return false; \
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}
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#define NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_BEGIN(_class) \
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NS_IMETHODIMP_(bool) \
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NS_CYCLE_COLLECTION_CLASSNAME(_class)::CanSkipInCCReal(void *p) \
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{ \
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_class *tmp = DowncastCCParticipant<_class >(p);
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#define NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_END \
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(void)tmp; \
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return false; \
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}
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#define NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_BEGIN(_class) \
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NS_IMETHODIMP_(bool) \
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NS_CYCLE_COLLECTION_CLASSNAME(_class)::CanSkipThisReal(void *p) \
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{ \
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_class *tmp = DowncastCCParticipant<_class >(p);
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#define NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_END \
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(void)tmp; \
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return false; \
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}
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///////////////////////////////////////////////////////////////////////////////
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// Helpers for implementing nsCycleCollectionParticipant::Unlink
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//
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// You need to use NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED if you want
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// the base class Unlink version to be called before your own implementation.
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// You can use NS_IMPL_CYCLE_COLLECTION_UNLINK_END_INHERITED if you want the
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// base class Unlink to get called after your own implementation. You should
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// never use them together.
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///////////////////////////////////////////////////////////////////////////////
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#define NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(_class) \
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NS_IMETHODIMP_(void) \
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NS_CYCLE_COLLECTION_CLASSNAME(_class)::Unlink(void *p) \
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{ \
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_class *tmp = DowncastCCParticipant<_class >(p);
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#define NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(_class, _base_class) \
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(_class) \
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nsISupports *s = static_cast<nsISupports*>(p); \
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NS_CYCLE_COLLECTION_CLASSNAME(_base_class)::Unlink(s);
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#define NS_IMPL_CYCLE_COLLECTION_UNLINK_HELPER(_field) \
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ImplCycleCollectionUnlink(tmp->_field);
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#define NS_IMPL_CYCLE_COLLECTION_UNLINK(...) \
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MOZ_STATIC_ASSERT_VALID_ARG_COUNT(__VA_ARGS__); \
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MOZ_FOR_EACH(NS_IMPL_CYCLE_COLLECTION_UNLINK_HELPER, (), (__VA_ARGS__))
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#define NS_IMPL_CYCLE_COLLECTION_UNLINK_END \
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(void)tmp; \
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}
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#define NS_IMPL_CYCLE_COLLECTION_UNLINK_END_INHERITED(_base_class) \
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nsISupports *s = static_cast<nsISupports*>(p); \
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NS_CYCLE_COLLECTION_CLASSNAME(_base_class)::Unlink(s); \
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(void)tmp; \
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}
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#define NS_IMPL_CYCLE_COLLECTION_UNLINK_0(_class) \
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(_class) \
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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///////////////////////////////////////////////////////////////////////////////
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// Helpers for implementing nsCycleCollectionParticipant::Traverse
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///////////////////////////////////////////////////////////////////////////////
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#define NS_IMPL_CYCLE_COLLECTION_DESCRIBE(_class, _refcnt) \
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cb.DescribeRefCountedNode(_refcnt, #_class);
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#define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INTERNAL(_class) \
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NS_IMETHODIMP \
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NS_CYCLE_COLLECTION_CLASSNAME(_class)::Traverse \
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(void *p, nsCycleCollectionTraversalCallback &cb) \
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{ \
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_class *tmp = DowncastCCParticipant<_class >(p);
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#define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(_class) \
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INTERNAL(_class) \
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NS_IMPL_CYCLE_COLLECTION_DESCRIBE(_class, tmp->mRefCnt.get())
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// Base class' CC participant should return NS_SUCCESS_INTERRUPTED_TRAVERSE
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// from Traverse if it wants derived classes to not traverse anything from
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// their CC participant.
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#define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(_class, _base_class) \
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INTERNAL(_class) \
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nsISupports *s = static_cast<nsISupports*>(p); \
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if (NS_CYCLE_COLLECTION_CLASSNAME(_base_class)::Traverse(s, cb) \
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== NS_SUCCESS_INTERRUPTED_TRAVERSE) { \
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return NS_SUCCESS_INTERRUPTED_TRAVERSE; \
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}
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#define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_HELPER(_field) \
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ImplCycleCollectionTraverse(cb, tmp->_field, #_field, 0);
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#define NS_IMPL_CYCLE_COLLECTION_TRAVERSE(...) \
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MOZ_STATIC_ASSERT_VALID_ARG_COUNT(__VA_ARGS__); \
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MOZ_FOR_EACH(NS_IMPL_CYCLE_COLLECTION_TRAVERSE_HELPER, (), (__VA_ARGS__))
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#define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_RAWPTR(_field) \
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CycleCollectionNoteChild(cb, tmp->_field, #_field);
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#define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS \
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{ \
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TraceCallbackFunc noteJsChild(&nsScriptObjectTracer::NoteJSChild); \
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Trace(p, noteJsChild, &cb); \
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}
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#define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END \
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(void)tmp; \
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return NS_OK; \
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}
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///////////////////////////////////////////////////////////////////////////////
|
|
// Helpers for implementing nsScriptObjectTracer::Trace
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
#define NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(_class) \
|
|
void \
|
|
NS_CYCLE_COLLECTION_CLASSNAME(_class)::Trace(void *p, \
|
|
const TraceCallbacks &aCallbacks, \
|
|
void *aClosure) \
|
|
{ \
|
|
_class *tmp = DowncastCCParticipant<_class >(p);
|
|
|
|
#define NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(_class, _base_class) \
|
|
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(_class) \
|
|
nsISupports *s = static_cast<nsISupports*>(p); \
|
|
NS_CYCLE_COLLECTION_CLASSNAME(_base_class)::Trace(s, aCallbacks, aClosure);
|
|
|
|
#define NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(_field) \
|
|
if (tmp->_field) \
|
|
aCallbacks.Trace(&tmp->_field, #_field, aClosure);
|
|
|
|
#define NS_IMPL_CYCLE_COLLECTION_TRACE_JSVAL_MEMBER_CALLBACK(_field) \
|
|
aCallbacks.Trace(&tmp->_field, #_field, aClosure);
|
|
|
|
// NB: The (void)tmp; hack in the TRACE_END macro exists to support
|
|
// implementations that don't need to do anything in their Trace method.
|
|
// Without this hack, some compilers warn about the unused tmp local.
|
|
#define NS_IMPL_CYCLE_COLLECTION_TRACE_END \
|
|
(void)tmp; \
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// Helpers for implementing a concrete nsCycleCollectionParticipant
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
// If a class defines a participant, then QIing an instance of that class to
|
|
// nsXPCOMCycleCollectionParticipant should produce that participant.
|
|
#ifdef DEBUG
|
|
#define NS_CHECK_FOR_RIGHT_PARTICIPANT_BASE \
|
|
virtual void CheckForRightParticipant()
|
|
#define NS_CHECK_FOR_RIGHT_PARTICIPANT_DERIVED \
|
|
virtual void CheckForRightParticipant() override
|
|
#define NS_CHECK_FOR_RIGHT_PARTICIPANT_BODY(_class) \
|
|
{ \
|
|
nsXPCOMCycleCollectionParticipant *p; \
|
|
CallQueryInterface(this, &p); \
|
|
MOZ_ASSERT(p == &NS_CYCLE_COLLECTION_INNERNAME, \
|
|
#_class " should QI to its own CC participant"); \
|
|
}
|
|
#define NS_CHECK_FOR_RIGHT_PARTICIPANT_IMPL(_class) \
|
|
NS_CHECK_FOR_RIGHT_PARTICIPANT_BASE \
|
|
NS_CHECK_FOR_RIGHT_PARTICIPANT_BODY(_class)
|
|
#define NS_CHECK_FOR_RIGHT_PARTICIPANT_IMPL_INHERITED(_class) \
|
|
NS_CHECK_FOR_RIGHT_PARTICIPANT_DERIVED \
|
|
NS_CHECK_FOR_RIGHT_PARTICIPANT_BODY(_class)
|
|
#else
|
|
#define NS_CHECK_FOR_RIGHT_PARTICIPANT_IMPL(_class)
|
|
#define NS_CHECK_FOR_RIGHT_PARTICIPANT_IMPL_INHERITED(_class)
|
|
#endif
|
|
|
|
#define NS_DECL_CYCLE_COLLECTION_CLASS_BODY_NO_UNLINK(_class, _base) \
|
|
public: \
|
|
NS_IMETHOD Traverse(void *p, nsCycleCollectionTraversalCallback &cb) \
|
|
override; \
|
|
NS_IMETHOD_(void) DeleteCycleCollectable(void *p) override \
|
|
{ \
|
|
DowncastCCParticipant<_class>(p)->DeleteCycleCollectable(); \
|
|
} \
|
|
static _class* Downcast(nsISupports* s) \
|
|
{ \
|
|
return static_cast<_class*>(static_cast<_base*>(s)); \
|
|
} \
|
|
static nsISupports* Upcast(_class *p) \
|
|
{ \
|
|
return NS_ISUPPORTS_CAST(_base*, p); \
|
|
} \
|
|
template<typename T> \
|
|
friend nsISupports* \
|
|
ToSupports(T* p, NS_CYCLE_COLLECTION_INNERCLASS* dummy);
|
|
|
|
#define NS_DECL_CYCLE_COLLECTION_CLASS_BODY(_class, _base) \
|
|
NS_DECL_CYCLE_COLLECTION_CLASS_BODY_NO_UNLINK(_class, _base) \
|
|
NS_IMETHOD_(void) Unlink(void *p) override;
|
|
|
|
#define NS_PARTICIPANT_AS(type, participant) \
|
|
const_cast<type*>(reinterpret_cast<const type*>(participant))
|
|
|
|
#define NS_IMPL_GET_XPCOM_CYCLE_COLLECTION_PARTICIPANT(_class) \
|
|
static MOZ_CONSTEXPR nsXPCOMCycleCollectionParticipant* GetParticipant() \
|
|
{ \
|
|
return &_class::NS_CYCLE_COLLECTION_INNERNAME; \
|
|
}
|
|
|
|
/**
|
|
* We use this macro to force that classes that inherit from a ccable class and
|
|
* declare their own participant declare themselves as inherited cc classes.
|
|
* To avoid possibly unnecessary vtables we only do this checking in debug
|
|
* builds.
|
|
*/
|
|
#ifdef DEBUG
|
|
#define NOT_INHERITED_CANT_OVERRIDE virtual void BaseCycleCollectable() final {}
|
|
#else
|
|
#define NOT_INHERITED_CANT_OVERRIDE
|
|
#endif
|
|
|
|
#define NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(_class, _base) \
|
|
class NS_CYCLE_COLLECTION_INNERCLASS \
|
|
: public nsXPCOMCycleCollectionParticipant \
|
|
{ \
|
|
NS_DECL_CYCLE_COLLECTION_CLASS_BODY(_class, _base) \
|
|
NS_IMPL_GET_XPCOM_CYCLE_COLLECTION_PARTICIPANT(_class) \
|
|
}; \
|
|
NS_CHECK_FOR_RIGHT_PARTICIPANT_IMPL(_class) \
|
|
static NS_CYCLE_COLLECTION_INNERCLASS NS_CYCLE_COLLECTION_INNERNAME; \
|
|
NOT_INHERITED_CANT_OVERRIDE
|
|
|
|
#define NS_DECL_CYCLE_COLLECTION_CLASS(_class) \
|
|
NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(_class, _class)
|
|
|
|
// Cycle collector helper for ambiguous classes that can sometimes be skipped.
|
|
#define NS_DECL_CYCLE_COLLECTION_SKIPPABLE_CLASS_AMBIGUOUS(_class, _base) \
|
|
class NS_CYCLE_COLLECTION_INNERCLASS \
|
|
: public nsXPCOMCycleCollectionParticipant \
|
|
{ \
|
|
public: \
|
|
MOZ_CONSTEXPR NS_CYCLE_COLLECTION_INNERCLASS () \
|
|
: nsXPCOMCycleCollectionParticipant(true) {} \
|
|
private: \
|
|
NS_DECL_CYCLE_COLLECTION_CLASS_BODY(_class, _base) \
|
|
NS_IMETHOD_(bool) CanSkipReal(void *p, bool aRemovingAllowed) override; \
|
|
NS_IMETHOD_(bool) CanSkipInCCReal(void *p) override; \
|
|
NS_IMETHOD_(bool) CanSkipThisReal(void *p) override; \
|
|
NS_IMPL_GET_XPCOM_CYCLE_COLLECTION_PARTICIPANT(_class) \
|
|
}; \
|
|
NS_CHECK_FOR_RIGHT_PARTICIPANT_IMPL(_class) \
|
|
static NS_CYCLE_COLLECTION_INNERCLASS NS_CYCLE_COLLECTION_INNERNAME; \
|
|
NOT_INHERITED_CANT_OVERRIDE
|
|
|
|
#define NS_DECL_CYCLE_COLLECTION_SKIPPABLE_CLASS(_class) \
|
|
NS_DECL_CYCLE_COLLECTION_SKIPPABLE_CLASS_AMBIGUOUS(_class, _class)
|
|
|
|
#define NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_AMBIGUOUS(_class, _base) \
|
|
class NS_CYCLE_COLLECTION_INNERCLASS \
|
|
: public nsXPCOMCycleCollectionParticipant \
|
|
{ \
|
|
NS_DECL_CYCLE_COLLECTION_CLASS_BODY(_class, _base) \
|
|
NS_IMETHOD_(void) Trace(void *p, const TraceCallbacks &cb, void *closure) override; \
|
|
NS_IMPL_GET_XPCOM_CYCLE_COLLECTION_PARTICIPANT(_class) \
|
|
}; \
|
|
NS_CHECK_FOR_RIGHT_PARTICIPANT_IMPL(_class) \
|
|
static NS_CYCLE_COLLECTION_INNERCLASS NS_CYCLE_COLLECTION_INNERNAME; \
|
|
NOT_INHERITED_CANT_OVERRIDE
|
|
|
|
#define NS_DECL_CYCLE_COLLECTION_SKIPPABLE_SCRIPT_HOLDER_CLASS_AMBIGUOUS(_class, _base) \
|
|
class NS_CYCLE_COLLECTION_INNERCLASS \
|
|
: public nsXPCOMCycleCollectionParticipant \
|
|
{ \
|
|
public: \
|
|
MOZ_CONSTEXPR NS_CYCLE_COLLECTION_INNERCLASS () \
|
|
: nsXPCOMCycleCollectionParticipant(true) {} \
|
|
private: \
|
|
NS_DECL_CYCLE_COLLECTION_CLASS_BODY(_class, _base) \
|
|
NS_IMETHOD_(void) Trace(void *p, const TraceCallbacks &cb, void *closure) override; \
|
|
NS_IMETHOD_(bool) CanSkipReal(void *p, bool aRemovingAllowed) override; \
|
|
NS_IMETHOD_(bool) CanSkipInCCReal(void *p) override; \
|
|
NS_IMETHOD_(bool) CanSkipThisReal(void *p) override; \
|
|
NS_IMPL_GET_XPCOM_CYCLE_COLLECTION_PARTICIPANT(_class) \
|
|
}; \
|
|
NS_CHECK_FOR_RIGHT_PARTICIPANT_IMPL(_class) \
|
|
static NS_CYCLE_COLLECTION_INNERCLASS NS_CYCLE_COLLECTION_INNERNAME; \
|
|
NOT_INHERITED_CANT_OVERRIDE
|
|
|
|
#define NS_DECL_CYCLE_COLLECTION_SKIPPABLE_SCRIPT_HOLDER_CLASS(_class) \
|
|
NS_DECL_CYCLE_COLLECTION_SKIPPABLE_SCRIPT_HOLDER_CLASS_AMBIGUOUS(_class, _class)
|
|
|
|
#define NS_DECL_CYCLE_COLLECTION_SKIPPABLE_SCRIPT_HOLDER_CLASS_INHERITED(_class, \
|
|
_base_class) \
|
|
class NS_CYCLE_COLLECTION_INNERCLASS \
|
|
: public NS_CYCLE_COLLECTION_CLASSNAME(_base_class) \
|
|
{ \
|
|
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED_BODY(_class, _base_class) \
|
|
NS_IMETHOD_(void) Trace(void *p, const TraceCallbacks &cb, void *closure) override; \
|
|
NS_IMETHOD_(bool) CanSkipReal(void *p, bool aRemovingAllowed) override; \
|
|
NS_IMETHOD_(bool) CanSkipInCCReal(void *p) override; \
|
|
NS_IMETHOD_(bool) CanSkipThisReal(void *p) override; \
|
|
NS_IMPL_GET_XPCOM_CYCLE_COLLECTION_PARTICIPANT(_class) \
|
|
}; \
|
|
NS_CHECK_FOR_RIGHT_PARTICIPANT_IMPL_INHERITED(_class) \
|
|
static NS_CYCLE_COLLECTION_INNERCLASS NS_CYCLE_COLLECTION_INNERNAME;
|
|
|
|
#define NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(_class) \
|
|
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_AMBIGUOUS(_class, _class)
|
|
|
|
#define NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED_BODY_NO_UNLINK(_class, \
|
|
_base_class) \
|
|
public: \
|
|
NS_IMETHOD Traverse(void *p, nsCycleCollectionTraversalCallback &cb) \
|
|
override; \
|
|
static _class* Downcast(nsISupports* s) \
|
|
{ \
|
|
return static_cast<_class*>(static_cast<_base_class*>( \
|
|
NS_CYCLE_COLLECTION_CLASSNAME(_base_class)::Downcast(s))); \
|
|
}
|
|
|
|
#define NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED_BODY(_class, _base_class) \
|
|
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED_BODY_NO_UNLINK(_class, _base_class) \
|
|
NS_IMETHOD_(void) Unlink(void *p) override;
|
|
|
|
#define NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(_class, _base_class) \
|
|
class NS_CYCLE_COLLECTION_INNERCLASS \
|
|
: public NS_CYCLE_COLLECTION_CLASSNAME(_base_class) \
|
|
{ \
|
|
public: \
|
|
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED_BODY(_class, _base_class) \
|
|
NS_IMPL_GET_XPCOM_CYCLE_COLLECTION_PARTICIPANT(_class) \
|
|
}; \
|
|
NS_CHECK_FOR_RIGHT_PARTICIPANT_IMPL_INHERITED(_class) \
|
|
static NS_CYCLE_COLLECTION_INNERCLASS NS_CYCLE_COLLECTION_INNERNAME;
|
|
|
|
#define NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED_NO_UNLINK(_class, \
|
|
_base_class) \
|
|
class NS_CYCLE_COLLECTION_INNERCLASS \
|
|
: public NS_CYCLE_COLLECTION_CLASSNAME(_base_class) \
|
|
{ \
|
|
public: \
|
|
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED_BODY_NO_UNLINK(_class, _base_class) \
|
|
NS_IMPL_GET_XPCOM_CYCLE_COLLECTION_PARTICIPANT(_class) \
|
|
}; \
|
|
NS_CHECK_FOR_RIGHT_PARTICIPANT_IMPL_INHERITED(_class) \
|
|
static NS_CYCLE_COLLECTION_INNERCLASS NS_CYCLE_COLLECTION_INNERNAME;
|
|
|
|
#define NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(_class, \
|
|
_base_class) \
|
|
class NS_CYCLE_COLLECTION_INNERCLASS \
|
|
: public NS_CYCLE_COLLECTION_CLASSNAME(_base_class) \
|
|
{ \
|
|
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED_BODY(_class, _base_class) \
|
|
NS_IMETHOD_(void) Trace(void *p, const TraceCallbacks &cb, void *closure) \
|
|
override; \
|
|
NS_IMPL_GET_XPCOM_CYCLE_COLLECTION_PARTICIPANT(_class) \
|
|
}; \
|
|
NS_CHECK_FOR_RIGHT_PARTICIPANT_IMPL_INHERITED(_class) \
|
|
static NS_CYCLE_COLLECTION_INNERCLASS NS_CYCLE_COLLECTION_INNERNAME;
|
|
|
|
// Cycle collector participant declarations.
|
|
|
|
#define NS_DECL_CYCLE_COLLECTION_NATIVE_CLASS_BODY(_class) \
|
|
public: \
|
|
NS_IMETHOD_(void) Root(void *n) override; \
|
|
NS_IMETHOD_(void) Unlink(void *n) override; \
|
|
NS_IMETHOD_(void) Unroot(void *n) override; \
|
|
NS_IMETHOD Traverse(void *n, nsCycleCollectionTraversalCallback &cb) \
|
|
override; \
|
|
NS_IMETHOD_(void) DeleteCycleCollectable(void *n) override \
|
|
{ \
|
|
DowncastCCParticipant<_class>(n)->DeleteCycleCollectable(); \
|
|
} \
|
|
static _class* Downcast(void* s) \
|
|
{ \
|
|
return DowncastCCParticipant<_class>(s); \
|
|
} \
|
|
static void* Upcast(_class *p) \
|
|
{ \
|
|
return static_cast<void*>(p); \
|
|
}
|
|
|
|
#define NS_DECL_CYCLE_COLLECTION_NATIVE_CLASS(_class) \
|
|
void DeleteCycleCollectable(void) \
|
|
{ \
|
|
delete this; \
|
|
} \
|
|
class NS_CYCLE_COLLECTION_INNERCLASS \
|
|
: public nsCycleCollectionParticipant \
|
|
{ \
|
|
NS_DECL_CYCLE_COLLECTION_NATIVE_CLASS_BODY(_class) \
|
|
static MOZ_CONSTEXPR nsCycleCollectionParticipant* GetParticipant() \
|
|
{ \
|
|
return &_class::NS_CYCLE_COLLECTION_INNERNAME; \
|
|
} \
|
|
}; \
|
|
static NS_CYCLE_COLLECTION_INNERCLASS NS_CYCLE_COLLECTION_INNERNAME;
|
|
|
|
#define NS_DECL_CYCLE_COLLECTION_SKIPPABLE_NATIVE_CLASS(_class) \
|
|
void DeleteCycleCollectable(void) \
|
|
{ \
|
|
delete this; \
|
|
} \
|
|
class NS_CYCLE_COLLECTION_INNERCLASS \
|
|
: public nsCycleCollectionParticipant \
|
|
{ \
|
|
public: \
|
|
MOZ_CONSTEXPR NS_CYCLE_COLLECTION_INNERCLASS () \
|
|
: nsCycleCollectionParticipant(true) {} \
|
|
private: \
|
|
NS_DECL_CYCLE_COLLECTION_NATIVE_CLASS_BODY(_class) \
|
|
NS_IMETHOD_(bool) CanSkipReal(void *p, bool aRemovingAllowed) override; \
|
|
NS_IMETHOD_(bool) CanSkipInCCReal(void *p) override; \
|
|
NS_IMETHOD_(bool) CanSkipThisReal(void *p) override; \
|
|
static nsCycleCollectionParticipant* GetParticipant() \
|
|
{ \
|
|
return &_class::NS_CYCLE_COLLECTION_INNERNAME; \
|
|
} \
|
|
}; \
|
|
static NS_CYCLE_COLLECTION_INNERCLASS NS_CYCLE_COLLECTION_INNERNAME;
|
|
|
|
#define NS_DECL_CYCLE_COLLECTION_SKIPPABLE_NATIVE_CLASS_WITH_CUSTOM_DELETE(_class) \
|
|
class NS_CYCLE_COLLECTION_INNERCLASS \
|
|
: public nsCycleCollectionParticipant \
|
|
{ \
|
|
public: \
|
|
MOZ_CONSTEXPR NS_CYCLE_COLLECTION_INNERCLASS () \
|
|
: nsCycleCollectionParticipant(true) {} \
|
|
private: \
|
|
NS_DECL_CYCLE_COLLECTION_NATIVE_CLASS_BODY(_class) \
|
|
NS_IMETHOD_(bool) CanSkipReal(void *p, bool aRemovingAllowed) override; \
|
|
NS_IMETHOD_(bool) CanSkipInCCReal(void *p) override; \
|
|
NS_IMETHOD_(bool) CanSkipThisReal(void *p) override; \
|
|
static nsCycleCollectionParticipant* GetParticipant() \
|
|
{ \
|
|
return &_class::NS_CYCLE_COLLECTION_INNERNAME; \
|
|
} \
|
|
}; \
|
|
static NS_CYCLE_COLLECTION_INNERCLASS NS_CYCLE_COLLECTION_INNERNAME;
|
|
|
|
#define NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(_class) \
|
|
void DeleteCycleCollectable(void) \
|
|
{ \
|
|
delete this; \
|
|
} \
|
|
class NS_CYCLE_COLLECTION_INNERCLASS \
|
|
: public nsScriptObjectTracer \
|
|
{ \
|
|
NS_DECL_CYCLE_COLLECTION_NATIVE_CLASS_BODY(_class) \
|
|
NS_IMETHOD_(void) Trace(void *p, const TraceCallbacks &cb, void *closure) \
|
|
override; \
|
|
static MOZ_CONSTEXPR nsScriptObjectTracer* GetParticipant() \
|
|
{ \
|
|
return &_class::NS_CYCLE_COLLECTION_INNERNAME; \
|
|
} \
|
|
}; \
|
|
static NS_CYCLE_COLLECTION_INNERCLASS NS_CYCLE_COLLECTION_INNERNAME;
|
|
|
|
#define NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(_class, _root_function) \
|
|
NS_IMETHODIMP_(void) \
|
|
NS_CYCLE_COLLECTION_CLASSNAME(_class)::Root(void *p) \
|
|
{ \
|
|
_class *tmp = static_cast<_class*>(p); \
|
|
tmp->_root_function(); \
|
|
}
|
|
|
|
#define NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(_class, _unroot_function) \
|
|
NS_IMETHODIMP_(void) \
|
|
NS_CYCLE_COLLECTION_CLASSNAME(_class)::Unroot(void *p) \
|
|
{ \
|
|
_class *tmp = static_cast<_class*>(p); \
|
|
tmp->_unroot_function(); \
|
|
}
|
|
|
|
#define NS_IMPL_CYCLE_COLLECTION_CLASS(_class) \
|
|
_class::NS_CYCLE_COLLECTION_INNERCLASS _class::NS_CYCLE_COLLECTION_INNERNAME;
|
|
|
|
// NB: This is not something you usually want to use. It is here to allow
|
|
// adding things to the CC graph to help debugging via CC logs, but it does not
|
|
// traverse or unlink anything, so it is useless for anything else.
|
|
#define NS_IMPL_CYCLE_COLLECTION_0(_class) \
|
|
NS_IMPL_CYCLE_COLLECTION_CLASS(_class) \
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(_class) \
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK_END \
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(_class) \
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
|
|
|
|
#define NS_IMPL_CYCLE_COLLECTION(_class, ...) \
|
|
NS_IMPL_CYCLE_COLLECTION_CLASS(_class) \
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(_class) \
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK(__VA_ARGS__) \
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK_END \
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(_class) \
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(__VA_ARGS__) \
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
|
|
|
|
// If you are looking for NS_IMPL_CYCLE_COLLECTION_INHERITED_0(_class, _base)
|
|
// you should instead not declare any cycle collected stuff in _class, so it
|
|
// will just inherit the CC declarations from _base.
|
|
|
|
#define NS_IMPL_CYCLE_COLLECTION_INHERITED(_class, _base, ...) \
|
|
NS_IMPL_CYCLE_COLLECTION_CLASS(_class) \
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(_class, _base) \
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK(__VA_ARGS__) \
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK_END \
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(_class, _base) \
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(__VA_ARGS__) \
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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#define NS_CYCLE_COLLECTION_NOTE_EDGE_NAME CycleCollectionNoteEdgeName
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#endif // nsCycleCollectionParticipant_h__
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