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573e1ef0ae
In Gecko, unlike other runnables where the TaskController picks one each at a time, the TimeoutManager allows multiple timers to run sequentially without allowing other runnables to run in between. This patch makes the user_blocking and user_visible tasks dispatched by Scheduler API can run before timers. Differential Revision: https://phabricator.services.mozilla.com/D237753
127 lines
4 KiB
C++
127 lines
4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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 "WebTaskSchedulerWorker.h"
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#include "mozilla/dom/WorkerScope.h"
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#include "mozilla/dom/TimeoutManager.h"
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namespace mozilla::dom {
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WebTaskWorkerRunnable::WebTaskWorkerRunnable(
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WebTaskSchedulerWorker* aSchedulerWorker)
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: WorkerSameThreadRunnable("WebTaskWorkerRunnable"),
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mSchedulerWorker(aSchedulerWorker) {
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MOZ_ASSERT(mSchedulerWorker);
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}
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RefPtr<WebTaskSchedulerWorker> WebTaskSchedulerWorker::Create(
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WorkerPrivate* aWorkerPrivate) {
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MOZ_ASSERT(aWorkerPrivate);
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aWorkerPrivate->AssertIsOnWorkerThread();
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RefPtr<WebTaskSchedulerWorker> scheduler =
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MakeRefPtr<WebTaskSchedulerWorker>(aWorkerPrivate);
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scheduler->mWorkerRef = StrongWorkerRef::Create(
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aWorkerPrivate, "WebTaskSchedulerWorker", [scheduler]() {
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// Set mWorkerIsShuttingDown as true here to avoid dispatching tasks
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// to worker thread.
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scheduler->mWorkerIsShuttingDown = true;
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});
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if (!scheduler->mWorkerRef) {
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NS_WARNING("Create WebTaskScheduler when Worker is shutting down");
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scheduler->mWorkerIsShuttingDown = true;
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}
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return scheduler;
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}
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WebTaskSchedulerWorker::WebTaskSchedulerWorker(WorkerPrivate* aWorkerPrivate)
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: WebTaskScheduler(aWorkerPrivate->GlobalScope()) {}
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bool WebTaskWorkerRunnable::WorkerRun(JSContext* aCx,
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WorkerPrivate* aWorkerPrivate) {
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aWorkerPrivate->AssertIsOnWorkerThread();
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if (mSchedulerWorker) {
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RefPtr<WebTask> task =
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mSchedulerWorker->GetNextTask(false /* aIsMainThread */);
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if (task) {
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task->Run();
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}
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}
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return true;
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}
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nsresult WebTaskSchedulerWorker::SetTimeoutForDelayedTask(
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WebTask* aTask, uint64_t aDelay, EventQueuePriority aPriority) {
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if (mWorkerIsShuttingDown) {
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return NS_ERROR_ABORT;
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}
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if (!mWorkerRef) {
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return NS_ERROR_UNEXPECTED;
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}
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WorkerPrivate* workerPrivate = mWorkerRef->Private();
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MOZ_ASSERT(workerPrivate);
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workerPrivate->AssertIsOnWorkerThread();
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JSContext* cx = nsContentUtils::GetCurrentJSContext();
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if (!cx) {
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return NS_ERROR_UNEXPECTED;
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}
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RefPtr<DelayedWebTaskHandler> handler =
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new DelayedWebTaskHandler(cx, this, aTask, aPriority);
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ErrorResult rv;
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int32_t delay = aDelay > INT32_MAX ? INT32_MAX : (int32_t)aDelay;
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workerPrivate->SetTimeout(cx, handler, delay,
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/* aIsInterval */ false,
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Timeout::Reason::eDelayedWebTaskTimeout, rv);
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return rv.StealNSResult();
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}
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bool WebTaskSchedulerWorker::DispatchEventLoopRunnable(
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EventQueuePriority aPriority) {
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// aPriority is unused at the moment, we can't control
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// the priorities for runnables on workers at the moment.
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//
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// This won't affect the correctness of this API because
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// WebTaskScheduler maintains its own priority queues.
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//
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// It's just that we can't interfere the ordering between
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// `WebTask` and other runnables.
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if (mWorkerIsShuttingDown) {
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return false;
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}
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if (!mWorkerRef) {
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return false;
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}
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MOZ_ASSERT(mWorkerRef->Private());
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mWorkerRef->Private()->AssertIsOnWorkerThread();
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RefPtr<WebTaskWorkerRunnable> runnable = new WebTaskWorkerRunnable(this);
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return runnable->Dispatch(mWorkerRef->Private());
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}
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void WebTaskSchedulerWorker::Disconnect() {
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if (mWorkerRef) {
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mWorkerRef = nullptr;
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}
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WebTaskScheduler::Disconnect();
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}
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void WebTaskSchedulerWorker::
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IncreaseNumNormalOrHighPriorityQueuesHaveTaskScheduled() {
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++mNumHighPriorityQueuesHaveTaskScheduled;
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}
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void WebTaskSchedulerWorker::
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DecreaseNumNormalOrHighPriorityQueuesHaveTaskScheduled() {
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MOZ_ASSERT(mNumHighPriorityQueuesHaveTaskScheduled > 0);
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--mNumHighPriorityQueuesHaveTaskScheduled;
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}
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} // namespace mozilla::dom
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