зеркало из https://github.com/mozilla/gecko-dev.git
565 строки
22 KiB
C++
565 строки
22 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "js/Exception.h"
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#include "js/TypeDecls.h"
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#include "js/Value.h"
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#include "mozilla/AlreadyAddRefed.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/dom/AbortSignal.h"
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#include "mozilla/dom/Promise.h"
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#include "mozilla/dom/Promise-inl.h"
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#include "mozilla/dom/WritableStream.h"
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#include "mozilla/dom/WritableStreamDefaultController.h"
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#include "mozilla/dom/WritableStreamDefaultControllerBinding.h"
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#include "mozilla/dom/UnderlyingSinkBinding.h"
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#include "nsCycleCollectionParticipant.h"
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#include "nsDebug.h"
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#include "nsISupports.h"
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namespace mozilla::dom {
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using namespace streams_abstract;
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// Note: Using the individual macros vs NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE
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// because I need to specificy a manual implementation of
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// NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN.
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NS_IMPL_CYCLE_COLLECTION_CLASS(WritableStreamDefaultController)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(WritableStreamDefaultController)
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mGlobal, mSignal, mStrategySizeAlgorithm,
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mAlgorithms, mStream)
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tmp->mQueue.clear();
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NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(WritableStreamDefaultController)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mGlobal, mSignal, mStrategySizeAlgorithm,
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mAlgorithms, mStream)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(WritableStreamDefaultController)
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NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER
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// Trace the associated queue.
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for (const auto& queueEntry : tmp->mQueue) {
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aCallbacks.Trace(&queueEntry->mValue, "mQueue.mValue", aClosure);
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}
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NS_IMPL_CYCLE_COLLECTION_TRACE_END
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NS_IMPL_CYCLE_COLLECTING_ADDREF(WritableStreamDefaultController)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(WritableStreamDefaultController)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(WritableStreamDefaultController)
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NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_END
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WritableStreamDefaultController::WritableStreamDefaultController(
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nsISupports* aGlobal, WritableStream& aStream)
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: mGlobal(do_QueryInterface(aGlobal)), mStream(&aStream) {
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mozilla::HoldJSObjects(this);
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}
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WritableStreamDefaultController::~WritableStreamDefaultController() {
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// MG:XXX: LinkedLists are required to be empty at destruction, but it seems
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// it is possible to have a controller be destructed while still
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// having entries in its queue.
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//
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// This needs to be verified as not indicating some other issue.
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mQueue.clear();
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mozilla::DropJSObjects(this);
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}
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JSObject* WritableStreamDefaultController::WrapObject(
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JSContext* aCx, JS::Handle<JSObject*> aGivenProto) {
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return WritableStreamDefaultController_Binding::Wrap(aCx, this, aGivenProto);
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}
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// https://streams.spec.whatwg.org/#ws-default-controller-error
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void WritableStreamDefaultController::Error(JSContext* aCx,
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JS::Handle<JS::Value> aError,
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ErrorResult& aRv) {
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// Step 1. Let state be this.[[stream]].[[state]].
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// Step 2. If state is not "writable", return.
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if (mStream->State() != WritableStream::WriterState::Writable) {
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return;
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}
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// Step 3. Perform ! WritableStreamDefaultControllerError(this, e).
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RefPtr<WritableStreamDefaultController> thisRefPtr = this;
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WritableStreamDefaultControllerError(aCx, thisRefPtr, aError, aRv);
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}
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// https://streams.spec.whatwg.org/#ws-default-controller-private-abort
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already_AddRefed<Promise> WritableStreamDefaultController::AbortSteps(
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JSContext* aCx, JS::Handle<JS::Value> aReason, ErrorResult& aRv) {
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// Step 1. Let result be the result of performing this.[[abortAlgorithm]],
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// passing reason.
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RefPtr<UnderlyingSinkAlgorithmsBase> algorithms = mAlgorithms;
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Optional<JS::Handle<JS::Value>> optionalReason(aCx, aReason);
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RefPtr<Promise> abortPromise =
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algorithms->AbortCallback(aCx, optionalReason, aRv);
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if (aRv.Failed()) {
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return nullptr;
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}
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// Step 2. Perform ! WritableStreamDefaultControllerClearAlgorithms(this).
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ClearAlgorithms();
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// Step 3. Return result.
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return abortPromise.forget();
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}
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// https://streams.spec.whatwg.org/#ws-default-controller-private-error
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void WritableStreamDefaultController::ErrorSteps() {
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// Step 1. Perform ! ResetQueue(this).
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ResetQueue(this);
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}
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void WritableStreamDefaultController::SetSignal(AbortSignal* aSignal) {
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MOZ_ASSERT(aSignal);
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mSignal = aSignal;
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}
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namespace streams_abstract {
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MOZ_CAN_RUN_SCRIPT static void
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WritableStreamDefaultControllerAdvanceQueueIfNeeded(
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JSContext* aCx, WritableStreamDefaultController* aController,
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ErrorResult& aRv);
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// https://streams.spec.whatwg.org/#set-up-writable-stream-default-controller
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void SetUpWritableStreamDefaultController(
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JSContext* aCx, WritableStream* aStream,
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WritableStreamDefaultController* aController,
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UnderlyingSinkAlgorithmsBase* aAlgorithms, double aHighWaterMark,
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QueuingStrategySize* aSizeAlgorithm, ErrorResult& aRv) {
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// Step 1. Assert: stream implements WritableStream.
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// Step 2. Assert: stream.[[controller]] is undefined.
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MOZ_ASSERT(!aStream->Controller());
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// Step 3. Set controller.[[stream]] to stream.
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// Note: Already set in
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// SetUpWritableStreamDefaultControllerFromUnderlyingSink.
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MOZ_ASSERT(aController->Stream() == aStream);
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// Step 4. Set stream.[[controller]] to controller.
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aStream->SetController(*aController);
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// Step 5. Perform ! ResetQueue(controller).
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ResetQueue(aController);
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// Step 6. Set controller.[[signal]] to a new AbortSignal.
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RefPtr<AbortSignal> signal = new AbortSignal(aController->GetParentObject(),
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false, JS::UndefinedHandleValue);
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aController->SetSignal(signal);
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// Step 7. Set controller.[[started]] to false.
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aController->SetStarted(false);
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// Step 8. Set controller.[[strategySizeAlgorithm]] to sizeAlgorithm.
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aController->SetStrategySizeAlgorithm(aSizeAlgorithm);
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// Step 9. Set controller.[[strategyHWM]] to highWaterMark.
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aController->SetStrategyHWM(aHighWaterMark);
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// Step 10. Set controller.[[writeAlgorithm]] to writeAlgorithm.
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// Step 11. Set controller.[[closeAlgorithm]] to closeAlgorithm.
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// Step 12. Set controller.[[abortAlgorithm]] to abortAlgorithm.
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aController->SetAlgorithms(*aAlgorithms);
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// Step 13. Let backpressure be !
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// WritableStreamDefaultControllerGetBackpressure(controller).
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bool backpressure = aController->GetBackpressure();
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// Step 14. Perform ! WritableStreamUpdateBackpressure(stream, backpressure).
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aStream->UpdateBackpressure(backpressure);
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// Step 15. Let startResult be the result of performing startAlgorithm. (This
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// may throw an exception.)
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JS::Rooted<JS::Value> startResult(aCx, JS::UndefinedValue());
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RefPtr<WritableStreamDefaultController> controller(aController);
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aAlgorithms->StartCallback(aCx, *controller, &startResult, aRv);
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if (aRv.Failed()) {
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return;
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}
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// Step 16. Let startPromise be a promise resolved with startResult.
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RefPtr<Promise> startPromise =
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Promise::CreateInfallible(aStream->GetParentObject());
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startPromise->MaybeResolve(startResult);
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// Step 17/18.
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startPromise->AddCallbacksWithCycleCollectedArgs(
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[](JSContext* aCx, JS::Handle<JS::Value> aValue, ErrorResult& aRv,
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WritableStreamDefaultController* aController)
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MOZ_CAN_RUN_SCRIPT_BOUNDARY {
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// Step 17. Upon fulfillment of startPromise,
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// Step 17.1. Assert: stream.[[state]] is "writable" or "erroring".
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MOZ_ASSERT(aController->Stream()->State() ==
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WritableStream::WriterState::Writable ||
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aController->Stream()->State() ==
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WritableStream::WriterState::Erroring);
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// Step 17.2. Set controller.[[started]] to true.
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aController->SetStarted(true);
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// Step 17.3 Perform
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// !WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller).
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WritableStreamDefaultControllerAdvanceQueueIfNeeded(
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aCx, MOZ_KnownLive(aController), aRv);
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},
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[](JSContext* aCx, JS::Handle<JS::Value> aValue, ErrorResult& aRv,
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WritableStreamDefaultController* aController)
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MOZ_CAN_RUN_SCRIPT_BOUNDARY {
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RefPtr<WritableStream> stream = aController->Stream();
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// Step 18. Upon rejection of startPromise with reason r,
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// Step 18.1. Assert: stream.[[state]] is "writable" or "erroring".
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MOZ_ASSERT(
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stream->State() == WritableStream::WriterState::Writable ||
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stream->State() == WritableStream::WriterState::Erroring);
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// Step 18.2. Set controller.[[started]] to true.
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aController->SetStarted(true);
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// Step 18.3. Perform ! WritableStreamDealWithRejection(stream, r).
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stream->DealWithRejection(aCx, aValue, aRv);
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},
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RefPtr(aController));
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}
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// https://streams.spec.whatwg.org/#set-up-writable-stream-default-controller-from-underlying-sink
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void SetUpWritableStreamDefaultControllerFromUnderlyingSink(
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JSContext* aCx, WritableStream* aStream,
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JS::Handle<JSObject*> aUnderlyingSink, UnderlyingSink& aUnderlyingSinkDict,
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double aHighWaterMark, QueuingStrategySize* aSizeAlgorithm,
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ErrorResult& aRv) {
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// Step 1.
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RefPtr<WritableStreamDefaultController> controller =
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new WritableStreamDefaultController(aStream->GetParentObject(), *aStream);
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// Step 2 - 9.
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auto algorithms = MakeRefPtr<UnderlyingSinkAlgorithms>(
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aStream->GetParentObject(), aUnderlyingSink, aUnderlyingSinkDict);
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// Step 10.
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SetUpWritableStreamDefaultController(aCx, aStream, controller, algorithms,
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aHighWaterMark, aSizeAlgorithm, aRv);
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}
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// https://streams.spec.whatwg.org/#writable-stream-default-controller-process-close
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MOZ_CAN_RUN_SCRIPT static void WritableStreamDefaultControllerProcessClose(
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JSContext* aCx, WritableStreamDefaultController* aController,
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ErrorResult& aRv) {
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// Step 1. Let stream be controller.[[stream]].
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RefPtr<WritableStream> stream = aController->Stream();
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// Step 2. Perform ! WritableStreamMarkCloseRequestInFlight(stream).
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stream->MarkCloseRequestInFlight();
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// Step 3. Perform ! DequeueValue(controller).
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JS::Rooted<JS::Value> value(aCx);
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DequeueValue(aController, &value);
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// Step 4. Assert: controller.[[queue]] is empty.
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MOZ_ASSERT(aController->Queue().isEmpty());
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// Step 5. Let sinkClosePromise be the result of performing
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// controller.[[closeAlgorithm]].
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RefPtr<UnderlyingSinkAlgorithmsBase> algorithms =
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aController->GetAlgorithms();
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RefPtr<Promise> sinkClosePromise = algorithms->CloseCallback(aCx, aRv);
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if (aRv.Failed()) {
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return;
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}
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// Step 6. Perform !
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// WritableStreamDefaultControllerClearAlgorithms(controller).
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aController->ClearAlgorithms();
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// Step 7 + 8.
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sinkClosePromise->AddCallbacksWithCycleCollectedArgs(
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[](JSContext* aCx, JS::Handle<JS::Value> aValue, ErrorResult& aRv,
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WritableStreamDefaultController* aController) {
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RefPtr<WritableStream> stream = aController->Stream();
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// Step 7. Upon fulfillment of sinkClosePromise,
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// Step 7.1. Perform ! WritableStreamFinishInFlightClose(stream).
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stream->FinishInFlightClose();
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},
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[](JSContext* aCx, JS::Handle<JS::Value> aValue, ErrorResult& aRv,
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WritableStreamDefaultController* aController)
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MOZ_CAN_RUN_SCRIPT_BOUNDARY {
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RefPtr<WritableStream> stream = aController->Stream();
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// Step 8. Upon rejection of sinkClosePromise with reason reason,
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// Step 8.1. Perform
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// ! WritableStreamFinishInFlightCloseWithError(stream, reason).
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stream->FinishInFlightCloseWithError(aCx, aValue, aRv);
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},
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RefPtr(aController));
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}
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// https://streams.spec.whatwg.org/#writable-stream-default-controller-process-write
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MOZ_CAN_RUN_SCRIPT static void WritableStreamDefaultControllerProcessWrite(
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JSContext* aCx, WritableStreamDefaultController* aController,
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JS::Handle<JS::Value> aChunk, ErrorResult& aRv) {
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// Step 1. Let stream be controller.[[stream]].
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RefPtr<WritableStream> stream = aController->Stream();
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// Step 2. Perform ! WritableStreamMarkFirstWriteRequestInFlight(stream).
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stream->MarkFirstWriteRequestInFlight();
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// Step 3. Let sinkWritePromise be the result of performing
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// controller.[[writeAlgorithm]], passing in chunk.
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RefPtr<UnderlyingSinkAlgorithmsBase> algorithms =
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aController->GetAlgorithms();
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RefPtr<Promise> sinkWritePromise =
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algorithms->WriteCallback(aCx, aChunk, *aController, aRv);
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if (aRv.Failed()) {
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return;
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}
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// Step 4 + 5:
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sinkWritePromise->AddCallbacksWithCycleCollectedArgs(
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[](JSContext* aCx, JS::Handle<JS::Value> aValue, ErrorResult& aRv,
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WritableStreamDefaultController* aController)
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MOZ_CAN_RUN_SCRIPT_BOUNDARY {
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RefPtr<WritableStream> stream = aController->Stream();
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// Step 4.1. Perform ! WritableStreamFinishInFlightWrite(stream).
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stream->FinishInFlightWrite();
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// Step 4.2. Let state be stream.[[state]].
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WritableStream::WriterState state = stream->State();
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// Step 4.3. Assert: state is "writable" or "erroring".
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MOZ_ASSERT(state == WritableStream::WriterState::Writable ||
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state == WritableStream::WriterState::Erroring);
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// Step 4.4. Perform ! DequeueValue(controller).
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JS::Rooted<JS::Value> value(aCx);
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DequeueValue(aController, &value);
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// Step 4.5. If ! WritableStreamCloseQueuedOrInFlight(stream) is
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// false and state is "writable",
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if (!stream->CloseQueuedOrInFlight() &&
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state == WritableStream::WriterState::Writable) {
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// Step 4.5.1. Let backpressure be !
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// WritableStreamDefaultControllerGetBackpressure(controller).
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bool backpressure = aController->GetBackpressure();
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// Step 4.5.2. Perform ! WritableStreamUpdateBackpressure(stream,
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// backpressure).
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stream->UpdateBackpressure(backpressure);
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}
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// Step 4.6. Perform !
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// WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller).
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WritableStreamDefaultControllerAdvanceQueueIfNeeded(
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aCx, MOZ_KnownLive(aController), aRv);
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},
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[](JSContext* aCx, JS::Handle<JS::Value> aValue, ErrorResult& aRv,
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WritableStreamDefaultController* aController)
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MOZ_CAN_RUN_SCRIPT_BOUNDARY {
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RefPtr<WritableStream> stream = aController->Stream();
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// Step 5.1. If stream.[[state]] is "writable", perform !
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// WritableStreamDefaultControllerClearAlgorithms(controller).
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if (stream->State() == WritableStream::WriterState::Writable) {
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aController->ClearAlgorithms();
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}
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// Step 5.2. Perform !
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// WritableStreamFinishInFlightWriteWithError(stream, reason)
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stream->FinishInFlightWriteWithError(aCx, aValue, aRv);
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},
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RefPtr(aController));
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}
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// We use a JS::MagicValue to represent the close sentinel required by the spec.
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// Normal JavaScript code can not generate magic values, so we can use this
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// as a special value. However care has to be taken to not leak the magic value
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// to other code.
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constexpr JSWhyMagic CLOSE_SENTINEL = JS_GENERIC_MAGIC;
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// https://streams.spec.whatwg.org/#writable-stream-default-controller-advance-queue-if-needed
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static void WritableStreamDefaultControllerAdvanceQueueIfNeeded(
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JSContext* aCx, WritableStreamDefaultController* aController,
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ErrorResult& aRv) {
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// Step 1. Let stream be controller.[[stream]].
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RefPtr<WritableStream> stream = aController->Stream();
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// Step 2. If controller.[[started]] is false, return.
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if (!aController->Started()) {
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return;
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}
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// Step 3. If stream.[[inFlightWriteRequest]] is not undefined, return.
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if (stream->GetInFlightWriteRequest()) {
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return;
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}
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// Step 4. Let state be stream.[[state]].
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WritableStream::WriterState state = stream->State();
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// Step 5. Assert: state is not "closed" or "errored".
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MOZ_ASSERT(state != WritableStream::WriterState::Closed &&
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state != WritableStream::WriterState::Errored);
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// Step 6. If state is "erroring",
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if (state == WritableStream::WriterState::Erroring) {
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// Step 6.1. Perform ! WritableStreamFinishErroring(stream).
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stream->FinishErroring(aCx, aRv);
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// Step 6.2. Return.
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return;
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}
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// Step 7. If controller.[[queue]] is empty, return.
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if (aController->Queue().isEmpty()) {
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return;
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}
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// Step 8. Let value be ! PeekQueueValue(controller).
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JS::Rooted<JS::Value> value(aCx);
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PeekQueueValue(aController, &value);
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// Step 9. If value is the close sentinel, perform !
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// WritableStreamDefaultControllerProcessClose(controller).
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if (value.isMagic(CLOSE_SENTINEL)) {
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WritableStreamDefaultControllerProcessClose(aCx, aController, aRv);
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return;
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}
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// Step 10. Otherwise, perform !
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// WritableStreamDefaultControllerProcessWrite(controller, value).
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WritableStreamDefaultControllerProcessWrite(aCx, aController, value, aRv);
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}
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// https://streams.spec.whatwg.org/#writable-stream-default-controller-close
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void WritableStreamDefaultControllerClose(
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JSContext* aCx, WritableStreamDefaultController* aController,
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ErrorResult& aRv) {
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// Step 1. Perform ! EnqueueValueWithSize(controller, close sentinel, 0).
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JS::Rooted<JS::Value> aCloseSentinel(aCx, JS::MagicValue(CLOSE_SENTINEL));
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EnqueueValueWithSize(aController, aCloseSentinel, 0, aRv);
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MOZ_ASSERT(!aRv.Failed());
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// Step 2. Perform !
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// WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller).
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WritableStreamDefaultControllerAdvanceQueueIfNeeded(aCx, aController, aRv);
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}
|
|
|
|
// https://streams.spec.whatwg.org/#writable-stream-default-controller-write
|
|
void WritableStreamDefaultControllerWrite(
|
|
JSContext* aCx, WritableStreamDefaultController* aController,
|
|
JS::Handle<JS::Value> aChunk, double chunkSize, ErrorResult& aRv) {
|
|
// Step 1. Let enqueueResult be EnqueueValueWithSize(controller, chunk,
|
|
// chunkSize).
|
|
IgnoredErrorResult rv;
|
|
EnqueueValueWithSize(aController, aChunk, chunkSize, rv);
|
|
|
|
// Step 2. If enqueueResult is an abrupt completion,
|
|
if (rv.MaybeSetPendingException(aCx,
|
|
"WritableStreamDefaultController.write")) {
|
|
JS::Rooted<JS::Value> error(aCx);
|
|
JS_GetPendingException(aCx, &error);
|
|
JS_ClearPendingException(aCx);
|
|
|
|
// Step 2.1. Perform !
|
|
// WritableStreamDefaultControllerErrorIfNeeded(controller,
|
|
// enqueueResult.[[Value]]).
|
|
WritableStreamDefaultControllerErrorIfNeeded(aCx, aController, error, aRv);
|
|
|
|
// Step 2.2. Return.
|
|
return;
|
|
}
|
|
|
|
// Step 3. Let stream be controller.[[stream]].
|
|
RefPtr<WritableStream> stream = aController->Stream();
|
|
|
|
// Step 4. If ! WritableStreamCloseQueuedOrInFlight(stream) is false and
|
|
// stream.[[state]] is "writable",
|
|
if (!stream->CloseQueuedOrInFlight() &&
|
|
stream->State() == WritableStream::WriterState::Writable) {
|
|
// Step 4.1. Let backpressure be
|
|
// !WritableStreamDefaultControllerGetBackpressure(controller).
|
|
bool backpressure = aController->GetBackpressure();
|
|
|
|
// Step 4.2. Perform ! WritableStreamUpdateBackpressure(stream,
|
|
// backpressure).
|
|
stream->UpdateBackpressure(backpressure);
|
|
}
|
|
|
|
// Step 5. Perform
|
|
// ! WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller).
|
|
WritableStreamDefaultControllerAdvanceQueueIfNeeded(aCx, aController, aRv);
|
|
}
|
|
|
|
void WritableStreamDefaultControllerError(
|
|
JSContext* aCx, WritableStreamDefaultController* aController,
|
|
JS::Handle<JS::Value> aError, ErrorResult& aRv) {
|
|
// Step 1. Let stream be controller.[[stream]].
|
|
RefPtr<WritableStream> stream = aController->Stream();
|
|
|
|
// Step 2. Assert: stream.[[state]] is "writable".
|
|
MOZ_ASSERT(stream->State() == WritableStream::WriterState::Writable);
|
|
|
|
// Step 3. Perform
|
|
// ! WritableStreamDefaultControllerClearAlgorithms(controller).
|
|
aController->ClearAlgorithms();
|
|
|
|
// Step 4.Perform ! WritableStreamStartErroring(stream, error).
|
|
stream->StartErroring(aCx, aError, aRv);
|
|
}
|
|
|
|
// https://streams.spec.whatwg.org/#writable-stream-default-controller-error-if-needed
|
|
void WritableStreamDefaultControllerErrorIfNeeded(
|
|
JSContext* aCx, WritableStreamDefaultController* aController,
|
|
JS::Handle<JS::Value> aError, ErrorResult& aRv) {
|
|
// Step 1. If controller.[[stream]].[[state]] is "writable", perform
|
|
// !WritableStreamDefaultControllerError(controller, error).
|
|
if (aController->Stream()->State() == WritableStream::WriterState::Writable) {
|
|
WritableStreamDefaultControllerError(aCx, aController, aError, aRv);
|
|
}
|
|
}
|
|
|
|
// https://streams.spec.whatwg.org/#writable-stream-default-controller-get-chunk-size
|
|
double WritableStreamDefaultControllerGetChunkSize(
|
|
JSContext* aCx, WritableStreamDefaultController* aController,
|
|
JS::Handle<JS::Value> aChunk, ErrorResult& aRv) {
|
|
// Step 1. Let returnValue be the result of performing
|
|
// controller.[[strategySizeAlgorithm]], passing in chunk, and interpreting
|
|
// the result as a completion record.
|
|
RefPtr<QueuingStrategySize> sizeAlgorithm(
|
|
aController->StrategySizeAlgorithm());
|
|
|
|
// If !sizeAlgorithm, we return 1, which is inlined from
|
|
// https://streams.spec.whatwg.org/#make-size-algorithm-from-size-function
|
|
Optional<JS::Handle<JS::Value>> optionalChunk(aCx, aChunk);
|
|
|
|
double chunkSize =
|
|
sizeAlgorithm
|
|
? sizeAlgorithm->Call(
|
|
optionalChunk, aRv,
|
|
"WritableStreamDefaultController.[[strategySizeAlgorithm]]",
|
|
CallbackObject::eRethrowExceptions)
|
|
: 1.0;
|
|
|
|
// Step 2. If returnValue is an abrupt completion,
|
|
if (aRv.MaybeSetPendingException(
|
|
aCx, "WritableStreamDefaultController.[[strategySizeAlgorithm]]")) {
|
|
JS::Rooted<JS::Value> error(aCx);
|
|
JS_GetPendingException(aCx, &error);
|
|
JS_ClearPendingException(aCx);
|
|
|
|
// Step 2.1. Perform !
|
|
// WritableStreamDefaultControllerErrorIfNeeded(controller,
|
|
// returnValue.[[Value]]).
|
|
WritableStreamDefaultControllerErrorIfNeeded(aCx, aController, error, aRv);
|
|
|
|
// Step 2.2. Return 1.
|
|
return 1.0;
|
|
}
|
|
|
|
// Step 3. Return returnValue.[[Value]].
|
|
return chunkSize;
|
|
}
|
|
|
|
} // namespace streams_abstract
|
|
|
|
} // namespace mozilla::dom
|