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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_PUBLIC_PLATFORM_TASK_TYPE_H_
#define THIRD_PARTY_BLINK_PUBLIC_PLATFORM_TASK_TYPE_H_
namespace blink {
// A list of task sources known to Blink according to the spec.
// This enum is used for a histogram and it should not be re-numbered.
//
// For the task type usage guideline, see https://bit.ly/2vMAsQ4
//
// When a new task type is created, use kCount value as a new value.
enum class TaskType : unsigned {
///////////////////////////////////////
// Speced tasks should use one of the following task types
///////////////////////////////////////
// Speced tasks and related internal tasks should be posted to one of
// the following task runners. These task runners may be throttled.
// This value is used as a default value in cases where TaskType
// isn't supported yet. Don't use outside platform/scheduler code.
kDeprecatedNone = 0,
// https://html.spec.whatwg.org/multipage/webappapis.html#generic-task-sources
//
// This task source is used for features that react to DOM manipulations, such
// as things that happen in a non-blocking fashion when an element is inserted
// into the document.
kDOMManipulation = 1,
// This task source is used for features that react to user interaction, for
// example keyboard or mouse input. Events sent in response to user input
// (e.g. click events) must be fired using tasks queued with the user
// interaction task source.
kUserInteraction = 2,
// TODO(altimin) Fix the networking task source related namings once it is
// clear how
// all loading tasks are annotated.
// This task source is used for features that trigger in response to network
// activity.
kNetworking = 3,
// This is a part of Networking task source used to annotate tasks which are
// posted from the loading stack (i.e. WebURLLoader).
kNetworkingWithURLLoaderAnnotation = 50,
// This task source is used for control messages between kNetworking tasks.
kNetworkingControl = 4,
// This task source is used to queue calls to history.back() and similar APIs.
kHistoryTraversal = 5,
// https://html.spec.whatwg.org/multipage/embedded-content.html#the-embed-element
// This task source is used for the embed element setup steps.
kEmbed = 6,
// https://html.spec.whatwg.org/multipage/embedded-content.html#media-elements
// This task source is used for all tasks queued in the [Media elements]
// section and subsections of the spec unless explicitly specified otherwise.
kMediaElementEvent = 7,
// https://html.spec.whatwg.org/multipage/scripting.html#the-canvas-element
// This task source is used to invoke the result callback of
// HTMLCanvasElement.toBlob().
kCanvasBlobSerialization = 8,
// https://html.spec.whatwg.org/multipage/webappapis.html#event-loop-processing-model
// This task source is used when an algorithm requires a microtask to be
// queued.
kMicrotask = 9,
// https://html.spec.whatwg.org/multipage/webappapis.html#timers
// This task source is used to queue tasks queued by setInterval() and similar
// APIs.
kJavascriptTimer = 10,
// https://html.spec.whatwg.org/multipage/comms.html#sse-processing-model
// This task source is used for any tasks that are queued by EventSource
// objects.
kRemoteEvent = 11,
// https://html.spec.whatwg.org/multipage/comms.html#feedback-from-the-protocol
// The task source for all tasks queued in the [WebSocket] section of the
// spec.
kWebSocket = 12,
// https://html.spec.whatwg.org/multipage/comms.html#web-messaging
// This task source is used for the tasks in cross-document messaging.
kPostedMessage = 13,
// https://html.spec.whatwg.org/multipage/comms.html#message-ports
kUnshippedPortMessage = 14,
// https://www.w3.org/TR/FileAPI/#blobreader-task-source
// This task source is used for all tasks queued in the FileAPI spec to read
// byte sequences associated with Blob and File objects.
kFileReading = 15,
// https://www.w3.org/TR/IndexedDB/#request-api
kDatabaseAccess = 16,
// https://w3c.github.io/presentation-api/#common-idioms
// This task source is used for all tasks in the Presentation API spec.
kPresentation = 17,
// https://www.w3.org/TR/2016/WD-generic-sensor-20160830/#sensor-task-source
// This task source is used for all tasks in the Sensor API spec.
kSensor = 18,
// https://w3c.github.io/performance-timeline/#performance-timeline
kPerformanceTimeline = 19,
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.15
// This task source is used for all tasks in the WebGL spec.
kWebGL = 20,
// https://www.w3.org/TR/requestidlecallback/#start-an-event-loop-s-idle-period
kIdleTask = 21,
// Use MiscPlatformAPI for a task that is defined in the spec but is not yet
// associated with any specific task runner in the spec. MiscPlatformAPI is
// not encouraged for stable and matured APIs. The spec should define the task
// runner explicitly.
// The task runner may be throttled.
kMiscPlatformAPI = 22,
// Tasks used for DedicatedWorker's requestAnimationFrame.
kWorkerAnimation = 51,
// For tasks started with the experimental Scheduling API
kExperimentalWebSchedulingUserInteraction = 53,
kExperimentalWebSchedulingBestEffort = 54,
///////////////////////////////////////
// Not-speced tasks should use one of the following task types
///////////////////////////////////////
// The default task type. The task may be throttled or paused.
kInternalDefault = 23,
// Tasks used for all tasks associated with loading page content.
kInternalLoading = 24,
// Tasks for tests or mock objects.
kInternalTest = 26,
// Tasks that are posting back the result from the WebCrypto task runner to
// the Blink thread that initiated the call and holds the Promise. Tasks with
// this type are posted by:
// * //components/webcrypto
kInternalWebCrypto = 27,
// Tasks to execute IndexedDB's callbacks. Tasks with this type are posted by:
// * //content/renderer/indexed_db
kInternalIndexedDB = 28,
// Tasks to execute media-related things like logging or playback. Tasks with
// this type are mainly posted by:
// * //content/renderer/media
// * //media
kInternalMedia = 29,
// Tasks to execute things for real-time media processing like recording. If a
// task touches MediaStreamTracks, associated sources and sinks, this task
// type should be used.
// Tasks with this type are mainly posted by:
// * //content/renderer/media
// * //media
kInternalMediaRealTime = 30,
// Tasks to execute IPC (legacy IPC and mojo).
kInternalIPC = 31,
// Tasks related to user interaction like clicking or inputting texts.
kInternalUserInteraction = 32,
// Tasks related to the inspector.
kInternalInspector = 33,
// Tasks related to workers. Tasks with this type are mainly posted by:
// * //third_party/blink/renderer/core/workers
kInternalWorker = 36,
// Translation task that freezes when the frame is not visible.
kInternalTranslation = 55,
// Tasks used at IntersectionObserver.
kInternalIntersectionObserver = 44,
///////////////////////////////////////
// The following task types are only for thread-local queues.
///////////////////////////////////////
kMainThreadTaskQueueV8 = 37,
kMainThreadTaskQueueCompositor = 38,
kMainThreadTaskQueueDefault = 39,
kMainThreadTaskQueueInput = 40,
kMainThreadTaskQueueIdle = 41,
kMainThreadTaskQueueIPC = 42,
kMainThreadTaskQueueControl = 43,
kMainThreadTaskQueueCleanup = 52,
kCompositorThreadTaskQueueDefault = 45,
kCompositorThreadTaskQueueInput = 49,
kWorkerThreadTaskQueueDefault = 46,
kWorkerThreadTaskQueueV8 = 47,
kWorkerThreadTaskQueueCompositor = 48,
kCount = 56,
};
} // namespace blink
#endif
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