pjs/dom/indexedDB/IDBWrapperCache.cpp

76 строки
2.5 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=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/. */
#include "IDBWrapperCache.h"
#include "nsContentUtils.h"
USING_INDEXEDDB_NAMESPACE
NS_IMPL_CYCLE_COLLECTION_CLASS(IDBWrapperCache)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(IDBWrapperCache,
nsDOMEventTargetHelper)
// Don't need NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS because
// nsDOMEventTargetHelper does it for us.
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(IDBWrapperCache,
nsDOMEventTargetHelper)
if (tmp->mScriptOwner) {
NS_DROP_JS_OBJECTS(tmp, IDBWrapperCache);
tmp->mScriptOwner = nsnull;
}
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(IDBWrapperCache,
nsDOMEventTargetHelper)
// Don't need NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER because
// nsDOMEventTargetHelper does it for us.
if (tmp->mScriptOwner) {
NS_IMPL_CYCLE_COLLECTION_TRACE_JS_CALLBACK(tmp->mScriptOwner,
"mScriptOwner")
}
NS_IMPL_CYCLE_COLLECTION_TRACE_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(IDBWrapperCache)
NS_INTERFACE_MAP_END_INHERITING(nsDOMEventTargetHelper)
NS_IMPL_ADDREF_INHERITED(IDBWrapperCache, nsDOMEventTargetHelper)
NS_IMPL_RELEASE_INHERITED(IDBWrapperCache, nsDOMEventTargetHelper)
IDBWrapperCache::~IDBWrapperCache()
{
if (mScriptOwner) {
NS_DROP_JS_OBJECTS(this, IDBWrapperCache);
}
}
bool
IDBWrapperCache::SetScriptOwner(JSObject* aScriptOwner)
{
if (!aScriptOwner) {
NS_ASSERTION(!mScriptOwner,
"Don't null out existing owner, we need to call "
"DropJSObjects!");
return true;
}
mScriptOwner = aScriptOwner;
nsISupports* thisSupports = NS_CYCLE_COLLECTION_UPCAST(this, IDBWrapperCache);
nsXPCOMCycleCollectionParticipant* participant;
CallQueryInterface(this, &participant);
nsresult rv = nsContentUtils::HoldJSObjects(thisSupports, participant);
if (NS_FAILED(rv)) {
NS_WARNING("nsContentUtils::HoldJSObjects failed.");
mScriptOwner = nsnull;
return false;
}
return true;
}