gecko-dev/xpcom/base/HoldDropJSObjects.h
Sylvestre Ledru 265e672179 Bug 1511181 - Reformat everything to the Google coding style r=ehsan a=clang-format
# ignore-this-changeset

--HG--
extra : amend_source : 4d301d3b0b8711c4692392aa76088ba7fd7d1022
2018-11-30 11:46:48 +01:00

64 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