dom/serviceworkers/ServiceWorkerProxy.cpp
author Brian Hackett <bhackett1024@gmail.com>
Fri, 31 Aug 2018 05:35:36 -1000
changeset 434430 d8447a4c32e7d4d991773f478f9dd2996628c51c
parent 425711 c5328bc15a3fe38059e1e8a7fac3a23d5c0f438c
child 448947 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1486616 - Execute record/replay triggers when finalizing deferred things, r=mccr8.

/* -*- 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/. */

#include "ServiceWorkerProxy.h"

#include "mozilla/ipc/BackgroundParent.h"
#include "ServiceWorkerInfo.h"

namespace mozilla {
namespace dom {

using mozilla::ipc::AssertIsOnBackgroundThread;

ServiceWorkerProxy::~ServiceWorkerProxy()
{
  // Any thread
  MOZ_DIAGNOSTIC_ASSERT(!mActor);
  MOZ_DIAGNOSTIC_ASSERT(!mInfo);
}

void
ServiceWorkerProxy::MaybeShutdownOnBGThread()
{
  AssertIsOnBackgroundThread();
  if (!mActor) {
    return;
  }
  mActor->MaybeSendDelete();
}

void
ServiceWorkerProxy::InitOnMainThread()
{
  AssertIsOnMainThread();

  auto scopeExit = MakeScopeExit([&] {
    MaybeShutdownOnMainThread();
  });

  RefPtr<ServiceWorkerManager> swm = ServiceWorkerManager::GetInstance();
  NS_ENSURE_TRUE_VOID(swm);

  RefPtr<ServiceWorkerRegistrationInfo> reg =
    swm->GetRegistration(mDescriptor.PrincipalInfo(), mDescriptor.Scope());
  NS_ENSURE_TRUE_VOID(reg);

  RefPtr<ServiceWorkerInfo> info = reg->GetByDescriptor(mDescriptor);
  NS_ENSURE_TRUE_VOID(info);

  scopeExit.release();

  mInfo = new nsMainThreadPtrHolder<ServiceWorkerInfo>("ServiceWorkerProxy::mInfo",
                                                       info);
}

void
ServiceWorkerProxy::MaybeShutdownOnMainThread()
{
  AssertIsOnMainThread();

  nsCOMPtr<nsIRunnable> r =
    NewRunnableMethod(__func__, this,
                      &ServiceWorkerProxy::MaybeShutdownOnBGThread);

  MOZ_ALWAYS_SUCCEEDS(mEventTarget->Dispatch(r.forget(), NS_DISPATCH_NORMAL));
}

void
ServiceWorkerProxy::StopListeningOnMainThread()
{
  AssertIsOnMainThread();
  mInfo = nullptr;
}

ServiceWorkerProxy::ServiceWorkerProxy(const ServiceWorkerDescriptor& aDescriptor)
  : mActor(nullptr)
  , mEventTarget(GetCurrentThreadSerialEventTarget())
  , mDescriptor(aDescriptor)
{
}

void
ServiceWorkerProxy::Init(ServiceWorkerParent* aActor)
{
  AssertIsOnBackgroundThread();
  MOZ_DIAGNOSTIC_ASSERT(aActor);
  MOZ_DIAGNOSTIC_ASSERT(!mActor);
  MOZ_DIAGNOSTIC_ASSERT(mEventTarget);

  mActor = aActor;

  // Note, this must be done from a separate Init() method and not in
  // the constructor.  If done from the constructor the runnable can
  // execute, complete, and release its reference before the constructor
  // returns.
  nsCOMPtr<nsIRunnable> r = NewRunnableMethod("ServiceWorkerProxy::Init", this,
                                              &ServiceWorkerProxy::InitOnMainThread);
  MOZ_ALWAYS_SUCCEEDS(SystemGroup::Dispatch(TaskCategory::Other, r.forget()));
}

void
ServiceWorkerProxy::RevokeActor(ServiceWorkerParent* aActor)
{
  AssertIsOnBackgroundThread();
  MOZ_DIAGNOSTIC_ASSERT(mActor);
  MOZ_DIAGNOSTIC_ASSERT(mActor == aActor);
  mActor = nullptr;

  nsCOMPtr<nsIRunnable> r =
    NewRunnableMethod(__func__, this,
                      &ServiceWorkerProxy::StopListeningOnMainThread);
  MOZ_ALWAYS_SUCCEEDS(SystemGroup::Dispatch(TaskCategory::Other, r.forget()));
}

void
ServiceWorkerProxy::PostMessage(RefPtr<ServiceWorkerCloneData>&& aData,
                                const ClientInfo& aClientInfo,
                                const ClientState& aClientState)
{
  AssertIsOnBackgroundThread();
  RefPtr<ServiceWorkerProxy> self = this;
  nsCOMPtr<nsIRunnable> r = NS_NewRunnableFunction(__func__,
    [self, data = std::move(aData), aClientInfo, aClientState] () mutable {
      if (!self->mInfo) {
        return;
      }
      self->mInfo->PostMessage(std::move(data), aClientInfo, aClientState);
    });
  MOZ_ALWAYS_SUCCEEDS(SystemGroup::Dispatch(TaskCategory::Other, r.forget()));
}

} // namespace dom
} // namespace mozilla