forked from mirrors/gecko-dev
9cdfde0a5e
The service worker job queue can get stuck sometimes, so we don't want the per-process service worker data structure to hold strong references to content. Instead, I add a proxy that is only a weak reference. The wrinkle is that we need to keep the promise alive as long as the job and the window are otherwise alive. I solve this by putting a cycle collected reference to the promise on the window itself. MozReview-Commit-ID: GbmCY4ZIQWk --HG-- extra : rebase_source : 363ea865fd51bb44f3e727cd3469e316370e7cbc
54 lines
1.5 KiB
C++
54 lines
1.5 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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/dom/PromiseWindowProxy.h"
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#include "nsGlobalWindowInner.h"
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#include "nsPIDOMWindow.h"
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#include "nsIWeakReference.h"
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#include "mozilla/dom/Promise.h"
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using namespace mozilla;
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using namespace dom;
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PromiseWindowProxy::PromiseWindowProxy(nsPIDOMWindowInner* aWindow, Promise* aPromise)
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: mPromise(aPromise)
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{
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MOZ_ASSERT(NS_IsMainThread());
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MOZ_DIAGNOSTIC_ASSERT(aWindow && aPromise);
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auto* window = nsGlobalWindowInner::Cast(aWindow);
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window->GetWeakReference(getter_AddRefs(mWindow));
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window->AddPendingPromise(aPromise);
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}
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PromiseWindowProxy::~PromiseWindowProxy()
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{
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MOZ_ASSERT(NS_IsMainThread());
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nsCOMPtr<nsPIDOMWindowInner> window = GetWindow();
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if (window && mPromise) {
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nsGlobalWindowInner::Cast(window)->RemovePendingPromise(mPromise);
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}
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}
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RefPtr<Promise>
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PromiseWindowProxy::Get() const
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{
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MOZ_ASSERT(NS_IsMainThread());
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if (!mPromise) {
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return nullptr;
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}
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RefPtr<Promise> promise(mPromise);
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return promise;
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}
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nsCOMPtr<nsPIDOMWindowInner>
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PromiseWindowProxy::GetWindow() const
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{
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MOZ_ASSERT(NS_IsMainThread());
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nsCOMPtr<nsPIDOMWindowInner> window = do_QueryReferent(mWindow);
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return window;
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}
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