tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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AbortController.cpp (2520B)

      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 "AbortController.h"
      8 
      9 #include "AbortSignal.h"
     10 #include "js/Value.h"
     11 #include "mozilla/HoldDropJSObjects.h"
     12 #include "mozilla/dom/AbortControllerBinding.h"
     13 #include "mozilla/dom/BindingUtils.h"
     14 #include "mozilla/dom/DOMException.h"
     15 #include "mozilla/dom/WorkerPrivate.h"
     16 
     17 namespace mozilla::dom {
     18 
     19 NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_WITH_JS_MEMBERS(AbortController,
     20                                                      (mGlobal, mSignal),
     21                                                      (mReason))
     22 
     23 NS_IMPL_CYCLE_COLLECTING_ADDREF(AbortController)
     24 NS_IMPL_CYCLE_COLLECTING_RELEASE(AbortController)
     25 
     26 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(AbortController)
     27  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
     28  NS_INTERFACE_MAP_ENTRY(nsISupports)
     29 NS_INTERFACE_MAP_END
     30 
     31 /* static */
     32 already_AddRefed<AbortController> AbortController::Constructor(
     33    const GlobalObject& aGlobal, ErrorResult& aRv) {
     34  nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(aGlobal.GetAsSupports());
     35  if (!global) {
     36    aRv.Throw(NS_ERROR_FAILURE);
     37    return nullptr;
     38  }
     39 
     40  RefPtr<AbortController> abortController = new AbortController(global);
     41  return abortController.forget();
     42 }
     43 
     44 AbortController::AbortController(nsIGlobalObject* aGlobal)
     45    : mGlobal(aGlobal), mAborted(false), mReason(JS::UndefinedHandleValue) {
     46  mozilla::HoldJSObjects(this);
     47 }
     48 
     49 JSObject* AbortController::WrapObject(JSContext* aCx,
     50                                      JS::Handle<JSObject*> aGivenProto) {
     51  return AbortController_Binding::Wrap(aCx, this, aGivenProto);
     52 }
     53 
     54 nsIGlobalObject* AbortController::GetParentObject() const { return mGlobal; }
     55 
     56 AbortSignal* AbortController::Signal() {
     57  if (!mSignal) {
     58    JS::Rooted<JS::Value> reason(RootingCx(), mReason);
     59    mSignal = AbortSignal::Create(
     60        mGlobal, mAborted ? SignalAborted::Yes : SignalAborted::No, reason);
     61  }
     62 
     63  return mSignal;
     64 }
     65 
     66 void AbortController::Abort(JSContext* aCx, JS::Handle<JS::Value> aReason) {
     67  if (mAborted) {
     68    return;
     69  }
     70 
     71  mAborted = true;
     72 
     73  if (mSignal) {
     74    mSignal->SignalAbort(aReason);
     75  } else {
     76    mReason = aReason;
     77  }
     78 }
     79 
     80 AbortController::~AbortController() { mozilla::DropJSObjects(this); }
     81 
     82 }  // namespace mozilla::dom