| 1 | /** |
| 2 | * Copyright (c) Meta Platforms, Inc. and affiliates. |
| 3 | * |
| 4 | * This source code is licensed under the MIT license found in the |
| 5 | * LICENSE file in the root directory of this source tree. |
| 6 | * |
| 7 | * @flow |
| 8 | */ |
| 9 | |
| 10 | /* eslint-disable no-var */ |
| 11 | /* eslint-disable react-internal/prod-error-codes */ |
| 12 | |
| 13 | import type {PriorityLevel} from '../SchedulerPriorities'; |
| 14 | |
| 15 | import {enableProfiling} from '../SchedulerFeatureFlags'; |
| 16 | import {push, pop, peek} from '../SchedulerMinHeap'; |
| 17 | |
| 18 | // TODO: Use symbols? |
| 19 | import { |
| 20 | ImmediatePriority, |
| 21 | UserBlockingPriority, |
| 22 | NormalPriority, |
| 23 | LowPriority, |
| 24 | IdlePriority, |
| 25 | } from '../SchedulerPriorities'; |
| 26 | import { |
| 27 | markTaskRun, |
| 28 | markTaskYield, |
| 29 | markTaskCompleted, |
| 30 | markTaskCanceled, |
| 31 | markTaskErrored, |
| 32 | markSchedulerSuspended, |
| 33 | markSchedulerUnsuspended, |
| 34 | markTaskStart, |
| 35 | stopLoggingProfilingEvents, |
| 36 | startLoggingProfilingEvents, |
| 37 | } from '../SchedulerProfiling'; |
| 38 | |
| 39 | type Callback = boolean => ?Callback; |
| 40 | |
| 41 | type Task = { |
| 42 | id: number, |
| 43 | callback: Callback | null, |
| 44 | priorityLevel: PriorityLevel, |
| 45 | startTime: number, |
| 46 | expirationTime: number, |
| 47 | sortIndex: number, |
| 48 | isQueued?: boolean, |
| 49 | }; |
| 50 | |
| 51 | // Max 31 bit integer. The max integer size in V8 for 32-bit systems. |
| 52 | // Math.pow(2, 30) - 1 |
| 53 | // 0b111111111111111111111111111111 |
| 54 | var maxSigned31BitInt = 1073741823; |
| 55 | |
| 56 | // Times out immediately |
| 57 | var IMMEDIATE_PRIORITY_TIMEOUT = -1; |
| 58 | // Eventually times out |
| 59 | var USER_BLOCKING_PRIORITY_TIMEOUT = 250; |
| 60 | var NORMAL_PRIORITY_TIMEOUT = 5000; |
| 61 | var LOW_PRIORITY_TIMEOUT = 10000; |
| 62 | // Never times out |
| 63 | var IDLE_PRIORITY_TIMEOUT = maxSigned31BitInt; |
| 64 | |
| 65 | // Tasks are stored on a min heap |
| 66 | var taskQueue: Array<Task> = []; |
| 67 | var timerQueue: Array<Task> = []; |
| 68 | |
| 69 | // Incrementing id counter. Used to maintain insertion order. |
| 70 | var taskIdCounter = 1; |
| 71 | |
| 72 | var currentTask = null; |
| 73 | var currentPriorityLevel: PriorityLevel = NormalPriority; |
| 74 | |
| 75 | // This is set while performing work, to prevent re-entrance. |
| 76 | var isPerformingWork = false; |
| 77 | |
| 78 | var isHostCallbackScheduled = false; |
| 79 | var isHostTimeoutScheduled = false; |
| 80 | |
| 81 | let currentMockTime: number = 0; |
| 82 | let scheduledCallback: |
| 83 | | null |
| 84 | | (( |
| 85 | hasTimeRemaining: boolean, |
| 86 | initialTime: DOMHighResTimeStamp | number, |
| 87 | ) => boolean) = null; |
| 88 | let scheduledTimeout: (number => void) | null = null; |
| 89 | let timeoutTime: number = -1; |
| 90 | let yieldedValues: Array<mixed> | null = null; |
| 91 | let expectedNumberOfYields: number = -1; |
| 92 | let didStop: boolean = false; |
| 93 | let isFlushing: boolean = false; |
| 94 | let needsPaint: boolean = false; |
| 95 | let shouldYieldForPaint: boolean = false; |
| 96 | |
| 97 | var disableYieldValue = false; |
| 98 | |
| 99 | function setDisableYieldValue(newValue: boolean) { |
| 100 | disableYieldValue = newValue; |
| 101 | } |
| 102 | |
| 103 | function advanceTimers(currentTime: number) { |
| 104 | // Check for tasks that are no longer delayed and add them to the queue. |
| 105 | let timer = peek(timerQueue); |
| 106 | while (timer !== null) { |
| 107 | if (timer.callback === null) { |
| 108 | // Timer was cancelled. |
| 109 | pop(timerQueue); |
| 110 | } else if (timer.startTime <= currentTime) { |
| 111 | // Timer fired. Transfer to the task queue. |
| 112 | pop(timerQueue); |
| 113 | timer.sortIndex = timer.expirationTime; |
| 114 | push(taskQueue, timer); |
| 115 | // $FlowFixMe[constant-condition] |
| 116 | if (enableProfiling) { |
| 117 | markTaskStart(timer, currentTime); |
| 118 | timer.isQueued = true; |
| 119 | } |
| 120 | } else { |
| 121 | // Remaining timers are pending. |
| 122 | return; |
| 123 | } |
| 124 | timer = peek(timerQueue); |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | function handleTimeout(currentTime: number) { |
| 129 | isHostTimeoutScheduled = false; |
| 130 | advanceTimers(currentTime); |
| 131 | |
| 132 | if (!isHostCallbackScheduled) { |
| 133 | if (peek(taskQueue) !== null) { |
| 134 | isHostCallbackScheduled = true; |
| 135 | requestHostCallback(flushWork); |
| 136 | } else { |
| 137 | const firstTimer = peek(timerQueue); |
| 138 | if (firstTimer !== null) { |
| 139 | requestHostTimeout(handleTimeout, firstTimer.startTime - currentTime); |
| 140 | } |
| 141 | } |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | function flushWork(hasTimeRemaining: boolean, initialTime: number) { |
| 146 | // $FlowFixMe[constant-condition] |
| 147 | if (enableProfiling) { |
| 148 | markSchedulerUnsuspended(initialTime); |
| 149 | } |
| 150 | |
| 151 | // We'll need a host callback the next time work is scheduled. |
| 152 | isHostCallbackScheduled = false; |
| 153 | if (isHostTimeoutScheduled) { |
| 154 | // We scheduled a timeout but it's no longer needed. Cancel it. |
| 155 | isHostTimeoutScheduled = false; |
| 156 | cancelHostTimeout(); |
| 157 | } |
| 158 | |
| 159 | isPerformingWork = true; |
| 160 | const previousPriorityLevel = currentPriorityLevel; |
| 161 | try { |
| 162 | // $FlowFixMe[constant-condition] |
| 163 | if (enableProfiling) { |
| 164 | try { |
| 165 | return workLoop(hasTimeRemaining, initialTime); |
| 166 | } catch (error) { |
| 167 | if (currentTask !== null) { |
| 168 | const currentTime = getCurrentTime(); |
| 169 | // $FlowFixMe[incompatible-call] found when upgrading Flow |
| 170 | // $FlowFixMe[incompatible-type] |
| 171 | markTaskErrored(currentTask, currentTime); |
| 172 | // $FlowFixMe[incompatible-use] found when upgrading Flow |
| 173 | currentTask.isQueued = false; |
| 174 | } |
| 175 | throw error; |
| 176 | } |
| 177 | } else { |
| 178 | // No catch in prod code path. |
| 179 | return workLoop(hasTimeRemaining, initialTime); |
| 180 | } |
| 181 | } finally { |
| 182 | currentTask = null; |
| 183 | currentPriorityLevel = previousPriorityLevel; |
| 184 | isPerformingWork = false; |
| 185 | // $FlowFixMe[constant-condition] |
| 186 | if (enableProfiling) { |
| 187 | const currentTime = getCurrentTime(); |
| 188 | markSchedulerSuspended(currentTime); |
| 189 | } |
| 190 | } |
| 191 | } |
| 192 | |
| 193 | function workLoop(hasTimeRemaining: boolean, initialTime: number): boolean { |
| 194 | let currentTime = initialTime; |
| 195 | advanceTimers(currentTime); |
| 196 | currentTask = peek(taskQueue); |
| 197 | while (currentTask !== null) { |
| 198 | if ( |
| 199 | currentTask.expirationTime > currentTime && |
| 200 | (!hasTimeRemaining || shouldYieldToHost()) |
| 201 | ) { |
| 202 | // This currentTask hasn't expired, and we've reached the deadline. |
| 203 | break; |
| 204 | } |
| 205 | // $FlowFixMe[incompatible-use] found when upgrading Flow |
| 206 | const callback = currentTask.callback; |
| 207 | if (typeof callback === 'function') { |
| 208 | // $FlowFixMe[incompatible-use] found when upgrading Flow |
| 209 | currentTask.callback = null; |
| 210 | // $FlowFixMe[incompatible-use] found when upgrading Flow |
| 211 | currentPriorityLevel = currentTask.priorityLevel; |
| 212 | // $FlowFixMe[incompatible-use] found when upgrading Flow |
| 213 | const didUserCallbackTimeout = currentTask.expirationTime <= currentTime; |
| 214 | // $FlowFixMe[constant-condition] |
| 215 | if (enableProfiling) { |
| 216 | // $FlowFixMe[incompatible-call] found when upgrading Flow |
| 217 | // $FlowFixMe[incompatible-type] |
| 218 | markTaskRun(currentTask, currentTime); |
| 219 | } |
| 220 | const continuationCallback = callback(didUserCallbackTimeout); |
| 221 | currentTime = getCurrentTime(); |
| 222 | if (typeof continuationCallback === 'function') { |
| 223 | // If a continuation is returned, immediately yield to the main thread |
| 224 | // regardless of how much time is left in the current time slice. |
| 225 | // $FlowFixMe[incompatible-use] found when upgrading Flow |
| 226 | currentTask.callback = continuationCallback; |
| 227 | // $FlowFixMe[constant-condition] |
| 228 | if (enableProfiling) { |
| 229 | // $FlowFixMe[incompatible-call] found when upgrading Flow |
| 230 | // $FlowFixMe[incompatible-type] |
| 231 | markTaskYield(currentTask, currentTime); |
| 232 | } |
| 233 | advanceTimers(currentTime); |
| 234 | |
| 235 | if (shouldYieldForPaint) { |
| 236 | needsPaint = true; |
| 237 | return true; |
| 238 | } else { |
| 239 | // If `shouldYieldForPaint` is false, we keep flushing synchronously |
| 240 | // without yielding to the main thread. This is the behavior of the |
| 241 | // `toFlushAndYield` and `toFlushAndYieldThrough` testing helpers . |
| 242 | } |
| 243 | } else { |
| 244 | // $FlowFixMe[constant-condition] |
| 245 | if (enableProfiling) { |
| 246 | // $FlowFixMe[incompatible-call] found when upgrading Flow |
| 247 | // $FlowFixMe[incompatible-type] |
| 248 | markTaskCompleted(currentTask, currentTime); |
| 249 | // $FlowFixMe[incompatible-use] found when upgrading Flow |
| 250 | currentTask.isQueued = false; |
| 251 | } |
| 252 | if (currentTask === peek(taskQueue)) { |
| 253 | pop(taskQueue); |
| 254 | } |
| 255 | advanceTimers(currentTime); |
| 256 | } |
| 257 | } else { |
| 258 | pop(taskQueue); |
| 259 | } |
| 260 | currentTask = peek(taskQueue); |
| 261 | } |
| 262 | // Return whether there's additional work |
| 263 | if (currentTask !== null) { |
| 264 | return true; |
| 265 | } else { |
| 266 | const firstTimer = peek(timerQueue); |
| 267 | if (firstTimer !== null) { |
| 268 | requestHostTimeout(handleTimeout, firstTimer.startTime - currentTime); |
| 269 | } |
| 270 | return false; |
| 271 | } |
| 272 | } |
| 273 | |
| 274 | function unstable_runWithPriority<T>( |
| 275 | priorityLevel: PriorityLevel, |
| 276 | eventHandler: () => T, |
| 277 | ): T { |
| 278 | switch (priorityLevel) { |
| 279 | case ImmediatePriority: |
| 280 | case UserBlockingPriority: |
| 281 | case NormalPriority: |
| 282 | case LowPriority: |
| 283 | case IdlePriority: |
| 284 | break; |
| 285 | default: |
| 286 | priorityLevel = NormalPriority; |
| 287 | } |
| 288 | |
| 289 | var previousPriorityLevel = currentPriorityLevel; |
| 290 | currentPriorityLevel = priorityLevel; |
| 291 | |
| 292 | try { |
| 293 | return eventHandler(); |
| 294 | } finally { |
| 295 | currentPriorityLevel = previousPriorityLevel; |
| 296 | } |
| 297 | } |
| 298 | |
| 299 | function unstable_next<T>(eventHandler: () => T): T { |
| 300 | var priorityLevel: PriorityLevel; |
| 301 | switch (currentPriorityLevel) { |
| 302 | case ImmediatePriority: |
| 303 | case UserBlockingPriority: |
| 304 | case NormalPriority: |
| 305 | // Shift down to normal priority |
| 306 | priorityLevel = NormalPriority; |
| 307 | break; |
| 308 | default: |
| 309 | // Anything lower than normal priority should remain at the current level. |
| 310 | priorityLevel = currentPriorityLevel; |
| 311 | break; |
| 312 | } |
| 313 | |
| 314 | var previousPriorityLevel = currentPriorityLevel; |
| 315 | currentPriorityLevel = priorityLevel; |
| 316 | |
| 317 | try { |
| 318 | return eventHandler(); |
| 319 | } finally { |
| 320 | currentPriorityLevel = previousPriorityLevel; |
| 321 | } |
| 322 | } |
| 323 | |
| 324 | function unstable_wrapCallback<T: (...Array<mixed>) => mixed>(callback: T): T { |
| 325 | var parentPriorityLevel = currentPriorityLevel; |
| 326 | // $FlowFixMe[incompatible-return] |
| 327 | // $FlowFixMe[missing-this-annot] |
| 328 | // $FlowFixMe[incompatible-type] |
| 329 | return function () { |
| 330 | // This is a fork of runWithPriority, inlined for performance. |
| 331 | var previousPriorityLevel = currentPriorityLevel; |
| 332 | currentPriorityLevel = parentPriorityLevel; |
| 333 | |
| 334 | try { |
| 335 | return callback.apply(this, arguments); |
| 336 | } finally { |
| 337 | currentPriorityLevel = previousPriorityLevel; |
| 338 | } |
| 339 | }; |
| 340 | } |
| 341 | |
| 342 | function unstable_scheduleCallback( |
| 343 | priorityLevel: PriorityLevel, |
| 344 | callback: Callback, |
| 345 | options?: {delay: number}, |
| 346 | ): Task { |
| 347 | var currentTime = getCurrentTime(); |
| 348 | |
| 349 | var startTime; |
| 350 | // $FlowFixMe[invalid-compare] |
| 351 | if (typeof options === 'object' && options !== null) { |
| 352 | var delay = options.delay; |
| 353 | if (typeof delay === 'number' && delay > 0) { |
| 354 | startTime = currentTime + delay; |
| 355 | } else { |
| 356 | startTime = currentTime; |
| 357 | } |
| 358 | } else { |
| 359 | startTime = currentTime; |
| 360 | } |
| 361 | |
| 362 | var timeout; |
| 363 | switch (priorityLevel) { |
| 364 | case ImmediatePriority: |
| 365 | timeout = IMMEDIATE_PRIORITY_TIMEOUT; |
| 366 | break; |
| 367 | case UserBlockingPriority: |
| 368 | timeout = USER_BLOCKING_PRIORITY_TIMEOUT; |
| 369 | break; |
| 370 | case IdlePriority: |
| 371 | timeout = IDLE_PRIORITY_TIMEOUT; |
| 372 | break; |
| 373 | case LowPriority: |
| 374 | timeout = LOW_PRIORITY_TIMEOUT; |
| 375 | break; |
| 376 | case NormalPriority: |
| 377 | default: |
| 378 | timeout = NORMAL_PRIORITY_TIMEOUT; |
| 379 | break; |
| 380 | } |
| 381 | |
| 382 | var expirationTime = startTime + timeout; |
| 383 | |
| 384 | var newTask: Task = { |
| 385 | id: taskIdCounter++, |
| 386 | callback, |
| 387 | priorityLevel, |
| 388 | startTime, |
| 389 | expirationTime, |
| 390 | sortIndex: -1, |
| 391 | }; |
| 392 | // $FlowFixMe[constant-condition] |
| 393 | if (enableProfiling) { |
| 394 | newTask.isQueued = false; |
| 395 | } |
| 396 | |
| 397 | if (startTime > currentTime) { |
| 398 | // This is a delayed task. |
| 399 | newTask.sortIndex = startTime; |
| 400 | push(timerQueue, newTask); |
| 401 | if (peek(taskQueue) === null && newTask === peek(timerQueue)) { |
| 402 | // All tasks are delayed, and this is the task with the earliest delay. |
| 403 | if (isHostTimeoutScheduled) { |
| 404 | // Cancel an existing timeout. |
| 405 | cancelHostTimeout(); |
| 406 | } else { |
| 407 | isHostTimeoutScheduled = true; |
| 408 | } |
| 409 | // Schedule a timeout. |
| 410 | requestHostTimeout(handleTimeout, startTime - currentTime); |
| 411 | } |
| 412 | } else { |
| 413 | newTask.sortIndex = expirationTime; |
| 414 | push(taskQueue, newTask); |
| 415 | // $FlowFixMe[constant-condition] |
| 416 | if (enableProfiling) { |
| 417 | markTaskStart(newTask, currentTime); |
| 418 | newTask.isQueued = true; |
| 419 | } |
| 420 | // Schedule a host callback, if needed. If we're already performing work, |
| 421 | // wait until the next time we yield. |
| 422 | if (!isHostCallbackScheduled && !isPerformingWork) { |
| 423 | isHostCallbackScheduled = true; |
| 424 | requestHostCallback(flushWork); |
| 425 | } |
| 426 | } |
| 427 | |
| 428 | return newTask; |
| 429 | } |
| 430 | |
| 431 | function unstable_cancelCallback(task: Task) { |
| 432 | // $FlowFixMe[constant-condition] |
| 433 | if (enableProfiling) { |
| 434 | if (task.isQueued) { |
| 435 | const currentTime = getCurrentTime(); |
| 436 | markTaskCanceled(task, currentTime); |
| 437 | task.isQueued = false; |
| 438 | } |
| 439 | } |
| 440 | |
| 441 | // Null out the callback to indicate the task has been canceled. (Can't |
| 442 | // remove from the queue because you can't remove arbitrary nodes from an |
| 443 | // array based heap, only the first one.) |
| 444 | task.callback = null; |
| 445 | } |
| 446 | |
| 447 | function unstable_getCurrentPriorityLevel(): PriorityLevel { |
| 448 | return currentPriorityLevel; |
| 449 | } |
| 450 | |
| 451 | function requestHostCallback(callback: (boolean, number) => boolean) { |
| 452 | scheduledCallback = callback; |
| 453 | } |
| 454 | |
| 455 | function requestHostTimeout(callback: number => void, ms: number) { |
| 456 | scheduledTimeout = callback; |
| 457 | timeoutTime = currentMockTime + ms; |
| 458 | } |
| 459 | |
| 460 | function cancelHostTimeout(): void { |
| 461 | scheduledTimeout = null; |
| 462 | timeoutTime = -1; |
| 463 | } |
| 464 | |
| 465 | function shouldYieldToHost(): boolean { |
| 466 | if ( |
| 467 | (expectedNumberOfYields === 0 && yieldedValues === null) || |
| 468 | (expectedNumberOfYields !== -1 && |
| 469 | yieldedValues !== null && |
| 470 | yieldedValues.length >= expectedNumberOfYields) || |
| 471 | (shouldYieldForPaint && needsPaint) |
| 472 | ) { |
| 473 | // We yielded at least as many values as expected. Stop flushing. |
| 474 | didStop = true; |
| 475 | return true; |
| 476 | } |
| 477 | return false; |
| 478 | } |
| 479 | |
| 480 | function getCurrentTime(): number { |
| 481 | return currentMockTime; |
| 482 | } |
| 483 | |
| 484 | function forceFrameRate() { |
| 485 | // No-op |
| 486 | } |
| 487 | |
| 488 | function reset() { |
| 489 | if (isFlushing) { |
| 490 | throw new Error('Cannot reset while already flushing work.'); |
| 491 | } |
| 492 | currentMockTime = 0; |
| 493 | scheduledCallback = null; |
| 494 | scheduledTimeout = null; |
| 495 | timeoutTime = -1; |
| 496 | yieldedValues = null; |
| 497 | expectedNumberOfYields = -1; |
| 498 | didStop = false; |
| 499 | isFlushing = false; |
| 500 | needsPaint = false; |
| 501 | } |
| 502 | |
| 503 | // Should only be used via an assertion helper that inspects the yielded values. |
| 504 | function unstable_flushNumberOfYields(count: number): void { |
| 505 | if (isFlushing) { |
| 506 | throw new Error('Already flushing work.'); |
| 507 | } |
| 508 | if (scheduledCallback !== null) { |
| 509 | const cb = scheduledCallback; |
| 510 | expectedNumberOfYields = count; |
| 511 | isFlushing = true; |
| 512 | try { |
| 513 | let hasMoreWork = true; |
| 514 | do { |
| 515 | hasMoreWork = cb(true, currentMockTime); |
| 516 | } while (hasMoreWork && !didStop); |
| 517 | if (!hasMoreWork) { |
| 518 | scheduledCallback = null; |
| 519 | } |
| 520 | } finally { |
| 521 | expectedNumberOfYields = -1; |
| 522 | didStop = false; |
| 523 | isFlushing = false; |
| 524 | } |
| 525 | } |
| 526 | } |
| 527 | |
| 528 | function unstable_flushUntilNextPaint(): false { |
| 529 | if (isFlushing) { |
| 530 | throw new Error('Already flushing work.'); |
| 531 | } |
| 532 | if (scheduledCallback !== null) { |
| 533 | const cb = scheduledCallback; |
| 534 | shouldYieldForPaint = true; |
| 535 | needsPaint = false; |
| 536 | isFlushing = true; |
| 537 | try { |
| 538 | let hasMoreWork = true; |
| 539 | do { |
| 540 | hasMoreWork = cb(true, currentMockTime); |
| 541 | } while (hasMoreWork && !didStop); |
| 542 | if (!hasMoreWork) { |
| 543 | scheduledCallback = null; |
| 544 | } |
| 545 | } finally { |
| 546 | shouldYieldForPaint = false; |
| 547 | didStop = false; |
| 548 | isFlushing = false; |
| 549 | } |
| 550 | } |
| 551 | return false; |
| 552 | } |
| 553 | |
| 554 | function unstable_hasPendingWork(): boolean { |
| 555 | return scheduledCallback !== null; |
| 556 | } |
| 557 | |
| 558 | function unstable_flushExpired() { |
| 559 | if (isFlushing) { |
| 560 | throw new Error('Already flushing work.'); |
| 561 | } |
| 562 | if (scheduledCallback !== null) { |
| 563 | isFlushing = true; |
| 564 | try { |
| 565 | const hasMoreWork = scheduledCallback(false, currentMockTime); |
| 566 | if (!hasMoreWork) { |
| 567 | scheduledCallback = null; |
| 568 | } |
| 569 | } finally { |
| 570 | isFlushing = false; |
| 571 | } |
| 572 | } |
| 573 | } |
| 574 | |
| 575 | function unstable_flushAllWithoutAsserting(): boolean { |
| 576 | // Returns false if no work was flushed. |
| 577 | if (isFlushing) { |
| 578 | throw new Error('Already flushing work.'); |
| 579 | } |
| 580 | if (scheduledCallback !== null) { |
| 581 | const cb = scheduledCallback; |
| 582 | isFlushing = true; |
| 583 | try { |
| 584 | let hasMoreWork = true; |
| 585 | do { |
| 586 | hasMoreWork = cb(true, currentMockTime); |
| 587 | } while (hasMoreWork); |
| 588 | // $FlowFixMe[constant-condition] |
| 589 | if (!hasMoreWork) { |
| 590 | scheduledCallback = null; |
| 591 | } |
| 592 | return true; |
| 593 | } finally { |
| 594 | isFlushing = false; |
| 595 | } |
| 596 | } else { |
| 597 | return false; |
| 598 | } |
| 599 | } |
| 600 | |
| 601 | function unstable_clearLog(): Array<mixed> { |
| 602 | if (yieldedValues === null) { |
| 603 | return []; |
| 604 | } |
| 605 | const values = yieldedValues; |
| 606 | yieldedValues = null; |
| 607 | return values; |
| 608 | } |
| 609 | |
| 610 | function unstable_flushAll(): void { |
| 611 | if (yieldedValues !== null) { |
| 612 | throw new Error( |
| 613 | 'Log is not empty. Assert on the log of yielded values before ' + |
| 614 | 'flushing additional work.', |
| 615 | ); |
| 616 | } |
| 617 | unstable_flushAllWithoutAsserting(); |
| 618 | if (yieldedValues !== null) { |
| 619 | throw new Error( |
| 620 | 'While flushing work, something yielded a value. Use an ' + |
| 621 | 'assertion helper to assert on the log of yielded values, e.g. ' + |
| 622 | 'expect(Scheduler).toFlushAndYield([...])', |
| 623 | ); |
| 624 | } |
| 625 | } |
| 626 | |
| 627 | function log(value: mixed): void { |
| 628 | // eslint-disable-next-line react-internal/no-production-logging |
| 629 | if (console.log.name === 'disabledLog' || disableYieldValue) { |
| 630 | // If console.log has been patched, we assume we're in render |
| 631 | // replaying and we ignore any values yielding in the second pass. |
| 632 | return; |
| 633 | } |
| 634 | if (yieldedValues === null) { |
| 635 | yieldedValues = [value]; |
| 636 | } else { |
| 637 | yieldedValues.push(value); |
| 638 | } |
| 639 | } |
| 640 | |
| 641 | function unstable_advanceTime(ms: number) { |
| 642 | // eslint-disable-next-line react-internal/no-production-logging |
| 643 | if (console.log.name === 'disabledLog' || disableYieldValue) { |
| 644 | // If console.log has been patched, we assume we're in render |
| 645 | // replaying and we ignore any time advancing in the second pass. |
| 646 | return; |
| 647 | } |
| 648 | currentMockTime += ms; |
| 649 | if (scheduledTimeout !== null && timeoutTime <= currentMockTime) { |
| 650 | scheduledTimeout(currentMockTime); |
| 651 | timeoutTime = -1; |
| 652 | scheduledTimeout = null; |
| 653 | } |
| 654 | } |
| 655 | |
| 656 | function requestPaint() { |
| 657 | needsPaint = true; |
| 658 | } |
| 659 | |
| 660 | export { |
| 661 | ImmediatePriority as unstable_ImmediatePriority, |
| 662 | UserBlockingPriority as unstable_UserBlockingPriority, |
| 663 | NormalPriority as unstable_NormalPriority, |
| 664 | IdlePriority as unstable_IdlePriority, |
| 665 | LowPriority as unstable_LowPriority, |
| 666 | unstable_runWithPriority, |
| 667 | unstable_next, |
| 668 | unstable_scheduleCallback, |
| 669 | unstable_cancelCallback, |
| 670 | unstable_wrapCallback, |
| 671 | unstable_getCurrentPriorityLevel, |
| 672 | shouldYieldToHost as unstable_shouldYield, |
| 673 | requestPaint as unstable_requestPaint, |
| 674 | getCurrentTime as unstable_now, |
| 675 | forceFrameRate as unstable_forceFrameRate, |
| 676 | unstable_flushAllWithoutAsserting, |
| 677 | unstable_flushNumberOfYields, |
| 678 | unstable_flushExpired, |
| 679 | unstable_clearLog, |
| 680 | unstable_flushUntilNextPaint, |
| 681 | unstable_hasPendingWork, |
| 682 | unstable_flushAll, |
| 683 | log, |
| 684 | unstable_advanceTime, |
| 685 | reset, |
| 686 | setDisableYieldValue as unstable_setDisableYieldValue, |
| 687 | }; |
| 688 | |
| 689 | export const unstable_Profiling: { |
| 690 | startLoggingProfilingEvents(): void, |
| 691 | stopLoggingProfilingEvents(): ArrayBuffer | null, |
| 692 | // $FlowFixMe[constant-condition] |
| 693 | } | null = enableProfiling |
| 694 | ? { |
| 695 | startLoggingProfilingEvents, |
| 696 | stopLoggingProfilingEvents, |
| 697 | } |
| 698 | : null; |