tor-browser

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

ScopedPort.cpp (2138B)

      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 "mozilla/ipc/ScopedPort.h"
      8 #include "mozilla/ipc/NodeController.h"
      9 #include "chrome/common/ipc_message_utils.h"
     10 
     11 namespace mozilla::ipc {
     12 
     13 void ScopedPort::Reset() {
     14  if (mValid) {
     15    mController->ClosePort(mPort);
     16  }
     17  mValid = false;
     18  mPort = {};
     19  mController = nullptr;
     20 }
     21 
     22 auto ScopedPort::Release() -> PortRef {
     23  if (!mValid) {
     24    return {};
     25  }
     26  mValid = false;
     27  mController = nullptr;
     28  return std::exchange(mPort, PortRef{});
     29 }
     30 
     31 ScopedPort::ScopedPort() = default;
     32 
     33 ScopedPort::~ScopedPort() { Reset(); }
     34 
     35 ScopedPort::ScopedPort(PortRef aPort, NodeController* aController)
     36    : mValid(true), mPort(std::move(aPort)), mController(aController) {
     37  MOZ_ASSERT(mPort.is_valid() && mController);
     38 }
     39 
     40 ScopedPort::ScopedPort(ScopedPort&& aOther)
     41    : mValid(std::exchange(aOther.mValid, false)),
     42      mPort(std::move(aOther.mPort)),
     43      mController(std::move(aOther.mController)) {}
     44 
     45 ScopedPort& ScopedPort::operator=(ScopedPort&& aOther) {
     46  if (this != &aOther) {
     47    Reset();
     48    mValid = std::exchange(aOther.mValid, false);
     49    mPort = std::move(aOther.mPort);
     50    mController = std::move(aOther.mController);
     51  }
     52  return *this;
     53 }
     54 
     55 }  // namespace mozilla::ipc
     56 
     57 void IPC::ParamTraits<mozilla::ipc::ScopedPort>::Write(MessageWriter* aWriter,
     58                                                       paramType&& aParam) {
     59  aWriter->WriteBool(aParam.IsValid());
     60  if (!aParam.IsValid()) {
     61    return;
     62  }
     63  aWriter->WritePort(std::move(aParam));
     64 }
     65 
     66 bool IPC::ParamTraits<mozilla::ipc::ScopedPort>::Read(MessageReader* aReader,
     67                                                      paramType* aResult) {
     68  bool isValid = false;
     69  if (!aReader->ReadBool(&isValid)) {
     70    return false;
     71  }
     72  if (!isValid) {
     73    *aResult = {};
     74    return true;
     75  }
     76  return aReader->ConsumePort(aResult);
     77 }