mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-30 00:01:50 +00:00
89 lines
3.0 KiB
C++
89 lines
3.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
// This header will be included by headers that define refpointer and array classes
|
|
// in order to specialize CC helpers such as ImplCycleCollectionTraverse for them.
|
|
|
|
#ifndef nsCycleCollectionNoteChild_h__
|
|
#define nsCycleCollectionNoteChild_h__
|
|
|
|
#include "nsCycleCollectionTraversalCallback.h"
|
|
#include "mozilla/Likely.h"
|
|
#include "mozilla/TypeTraits.h"
|
|
|
|
enum {
|
|
CycleCollectionEdgeNameArrayFlag = 1
|
|
};
|
|
|
|
// Just a helper for appending "[i]". Didn't want to pull in string headers here.
|
|
void
|
|
CycleCollectionNoteEdgeNameImpl(nsCycleCollectionTraversalCallback& aCallback,
|
|
const char* aName,
|
|
uint32_t aFlags = 0);
|
|
|
|
// Should be inlined so that in the no-debug-info case this is just a simple if().
|
|
MOZ_ALWAYS_INLINE void
|
|
CycleCollectionNoteEdgeName(nsCycleCollectionTraversalCallback& aCallback,
|
|
const char* aName,
|
|
uint32_t aFlags = 0)
|
|
{
|
|
if (MOZ_UNLIKELY(aCallback.WantDebugInfo())) {
|
|
CycleCollectionNoteEdgeNameImpl(aCallback, aName, aFlags);
|
|
}
|
|
}
|
|
|
|
#define NS_CYCLE_COLLECTION_INNERCLASS \
|
|
cycleCollection
|
|
|
|
#define NS_CYCLE_COLLECTION_INNERNAME \
|
|
_cycleCollectorGlobal
|
|
|
|
#define NS_CYCLE_COLLECTION_PARTICIPANT(_class) \
|
|
_class::NS_CYCLE_COLLECTION_INNERCLASS::GetParticipant()
|
|
|
|
template <typename T>
|
|
nsISupports* ToSupports(T* p, typename T::NS_CYCLE_COLLECTION_INNERCLASS* dummy = 0)
|
|
{
|
|
return T::NS_CYCLE_COLLECTION_INNERCLASS::Upcast(p);
|
|
}
|
|
|
|
// The default implementation of this class template is empty, because it
|
|
// should never be used: see the partial specializations below.
|
|
template <typename T,
|
|
bool IsXPCOM = mozilla::IsBaseOf<nsISupports, T>::value>
|
|
struct CycleCollectionNoteChildImpl
|
|
{
|
|
};
|
|
|
|
template <typename T>
|
|
struct CycleCollectionNoteChildImpl<T, true>
|
|
{
|
|
static void Run(nsCycleCollectionTraversalCallback& aCallback, T* aChild)
|
|
{
|
|
aCallback.NoteXPCOMChild(ToSupports(aChild));
|
|
}
|
|
};
|
|
|
|
template <typename T>
|
|
struct CycleCollectionNoteChildImpl<T, false>
|
|
{
|
|
static void Run(nsCycleCollectionTraversalCallback& aCallback, T* aChild)
|
|
{
|
|
aCallback.NoteNativeChild(aChild, NS_CYCLE_COLLECTION_PARTICIPANT(T));
|
|
}
|
|
};
|
|
|
|
template <typename T>
|
|
inline void CycleCollectionNoteChild(nsCycleCollectionTraversalCallback& aCallback,
|
|
T* aChild,
|
|
const char* aName,
|
|
uint32_t aFlags = 0)
|
|
{
|
|
CycleCollectionNoteEdgeName(aCallback, aName, aFlags);
|
|
CycleCollectionNoteChildImpl<T>::Run(aCallback, aChild);
|
|
}
|
|
|
|
#endif // nsCycleCollectionNoteChild_h__
|