tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
Log | Files | Refs | README | LICENSE

VsyncWorkerChild.cpp (2085B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #include "VsyncWorkerChild.h"
      8 
      9 #include "mozilla/dom/WorkerPrivate.h"
     10 #include "mozilla/dom/WorkerRef.h"
     11 #include "mozilla/dom/WorkerScope.h"
     12 
     13 namespace mozilla::dom {
     14 
     15 VsyncWorkerChild::VsyncWorkerChild() = default;
     16 
     17 VsyncWorkerChild::~VsyncWorkerChild() = default;
     18 
     19 bool VsyncWorkerChild::Initialize(WorkerPrivate* aWorkerPrivate) {
     20  MOZ_ASSERT(aWorkerPrivate);
     21  MOZ_ASSERT(!mWorkerRef);
     22 
     23  mWorkerRef =
     24      IPCWorkerRef::Create(aWorkerPrivate, "VsyncWorkerChild",
     25                           [self = RefPtr{this}]() { self->Destroy(); });
     26  return !!mWorkerRef;
     27 }
     28 
     29 void VsyncWorkerChild::Destroy() {
     30  MOZ_ASSERT_IF(!CanSend(), !mWorkerRef);
     31  MOZ_ASSERT_IF(!CanSend(), !mObserving);
     32  Send__delete__(this);
     33  MOZ_ASSERT(!mWorkerRef);
     34  MOZ_ASSERT(!mObserving);
     35 }
     36 
     37 void VsyncWorkerChild::TryObserve() {
     38  if (CanSend() && !mObserving) {
     39    mObserving = SendObserve();
     40  }
     41 }
     42 
     43 void VsyncWorkerChild::TryUnobserve() {
     44  if (CanSend() && mObserving) {
     45    mObserving = !SendUnobserve();
     46  }
     47 }
     48 
     49 mozilla::ipc::IPCResult VsyncWorkerChild::RecvNotify(const VsyncEvent& aVsync,
     50                                                     const float& aVsyncRate) {
     51  // For MOZ_CAN_RUN_SCRIPT_BOUNDARY purposes: We know IPDL is explicitly
     52  // keeping our actor alive until it is done processing the messages. We know
     53  // that the WorkerGlobalScope callee is responsible keeping itself alive
     54  // during the OnVsync callback.
     55  WorkerPrivate* workerPrivate = mWorkerRef->Private();
     56  WorkerGlobalScope* scope = workerPrivate->GlobalScope();
     57  if (scope) {
     58    scope->OnVsync(aVsync);
     59  }
     60  return IPC_OK();
     61 }
     62 
     63 void VsyncWorkerChild::ActorDestroy(ActorDestroyReason aActorDestroyReason) {
     64  mWorkerRef = nullptr;
     65  mObserving = false;
     66 }
     67 
     68 }  // namespace mozilla::dom