forked from mirrors/gecko-dev
77 lines
1.8 KiB
C++
77 lines
1.8 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* 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/. */
|
|
|
|
#ifndef mozilla_HoldDropJSObjects_h
|
|
#define mozilla_HoldDropJSObjects_h
|
|
|
|
#include "mozilla/TypeTraits.h"
|
|
#include "nsCycleCollectionParticipant.h"
|
|
|
|
class nsISupports;
|
|
class nsScriptObjectTracer;
|
|
|
|
// Only HoldJSObjects and DropJSObjects should be called directly.
|
|
|
|
namespace mozilla {
|
|
namespace cyclecollector {
|
|
|
|
void HoldJSObjectsImpl(void* aHolder, nsScriptObjectTracer* aTracer);
|
|
void HoldJSObjectsImpl(nsISupports* aHolder);
|
|
void DropJSObjectsImpl(void* aHolder);
|
|
void DropJSObjectsImpl(nsISupports* aHolder);
|
|
|
|
} // namespace cyclecollector
|
|
|
|
|
|
template<class T, bool isISupports = IsBaseOf<nsISupports, T>::value>
|
|
struct HoldDropJSObjectsHelper
|
|
{
|
|
static void Hold(T* aHolder)
|
|
{
|
|
cyclecollector::HoldJSObjectsImpl(aHolder,
|
|
NS_CYCLE_COLLECTION_PARTICIPANT(T));
|
|
}
|
|
static void Drop(T* aHolder)
|
|
{
|
|
cyclecollector::DropJSObjectsImpl(aHolder);
|
|
}
|
|
};
|
|
|
|
template<class T>
|
|
struct HoldDropJSObjectsHelper<T, true>
|
|
{
|
|
static void Hold(T* aHolder)
|
|
{
|
|
cyclecollector::HoldJSObjectsImpl(ToSupports(aHolder));
|
|
}
|
|
static void Drop(T* aHolder)
|
|
{
|
|
cyclecollector::DropJSObjectsImpl(ToSupports(aHolder));
|
|
}
|
|
};
|
|
|
|
|
|
template<class T>
|
|
void
|
|
HoldJSObjects(T* aHolder)
|
|
{
|
|
HoldDropJSObjectsHelper<T>::Hold(aHolder);
|
|
}
|
|
|
|
template<class T>
|
|
void
|
|
DropJSObjects(T* aHolder)
|
|
{
|
|
HoldDropJSObjectsHelper<T>::Drop(aHolder);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
bool IsJSHolder(void* aHolder);
|
|
#endif
|
|
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla_HoldDropJSObjects_h
|