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| author | littleblack111 <littleblack11111@gmail.com> | 2023-10-31 15:37:35 +0800 |
|---|---|---|
| committer | littleblack111 <littleblack11111@gmail.com> | 2023-10-31 15:37:35 +0800 |
| commit | d5f14083061f2ce6a42313188443a42e30796320 (patch) | |
| tree | cc6a9889e08b29595a76a33b9e7b4ef84866468b /node_modules/webpack/lib/util/AsyncQueue.js | |
| parent | b1a6ea021f29f182b62f9f81024a3d8ac8621b7f (diff) | |
added make browserlist(autoprefixer) work fixed
Diffstat (limited to 'node_modules/webpack/lib/util/AsyncQueue.js')
| -rw-r--r-- | node_modules/webpack/lib/util/AsyncQueue.js | 375 |
1 files changed, 375 insertions, 0 deletions
diff --git a/node_modules/webpack/lib/util/AsyncQueue.js b/node_modules/webpack/lib/util/AsyncQueue.js new file mode 100644 index 00000000..feb69a7d --- /dev/null +++ b/node_modules/webpack/lib/util/AsyncQueue.js @@ -0,0 +1,375 @@ +/* + MIT License http://www.opensource.org/licenses/mit-license.php + Author Tobias Koppers @sokra +*/ + +"use strict"; + +const { SyncHook, AsyncSeriesHook } = require("tapable"); +const { makeWebpackError } = require("../HookWebpackError"); +const WebpackError = require("../WebpackError"); +const ArrayQueue = require("./ArrayQueue"); + +const QUEUED_STATE = 0; +const PROCESSING_STATE = 1; +const DONE_STATE = 2; + +let inHandleResult = 0; + +/** + * @template T + * @callback Callback + * @param {(WebpackError | null)=} err + * @param {T=} result + */ + +/** + * @template T + * @template K + * @template R + */ +class AsyncQueueEntry { + /** + * @param {T} item the item + * @param {Callback<R>} callback the callback + */ + constructor(item, callback) { + this.item = item; + /** @type {typeof QUEUED_STATE | typeof PROCESSING_STATE | typeof DONE_STATE} */ + this.state = QUEUED_STATE; + this.callback = callback; + /** @type {Callback<R>[] | undefined} */ + this.callbacks = undefined; + this.result = undefined; + /** @type {WebpackError | undefined} */ + this.error = undefined; + } +} + +/** + * @template T + * @template K + * @template R + */ +class AsyncQueue { + /** + * @param {Object} options options object + * @param {string=} options.name name of the queue + * @param {number=} options.parallelism how many items should be processed at once + * @param {AsyncQueue<any, any, any>=} options.parent parent queue, which will have priority over this queue and with shared parallelism + * @param {function(T): K=} options.getKey extract key from item + * @param {function(T, Callback<R>): void} options.processor async function to process items + */ + constructor({ name, parallelism, parent, processor, getKey }) { + this._name = name; + this._parallelism = parallelism || 1; + this._processor = processor; + this._getKey = + getKey || /** @type {(T) => K} */ (item => /** @type {any} */ (item)); + /** @type {Map<K, AsyncQueueEntry<T, K, R>>} */ + this._entries = new Map(); + /** @type {ArrayQueue<AsyncQueueEntry<T, K, R>>} */ + this._queued = new ArrayQueue(); + /** @type {AsyncQueue<any, any, any>[] | undefined} */ + this._children = undefined; + this._activeTasks = 0; + this._willEnsureProcessing = false; + this._needProcessing = false; + this._stopped = false; + this._root = parent ? parent._root : this; + if (parent) { + if (this._root._children === undefined) { + this._root._children = [this]; + } else { + this._root._children.push(this); + } + } + + this.hooks = { + /** @type {AsyncSeriesHook<[T]>} */ + beforeAdd: new AsyncSeriesHook(["item"]), + /** @type {SyncHook<[T]>} */ + added: new SyncHook(["item"]), + /** @type {AsyncSeriesHook<[T]>} */ + beforeStart: new AsyncSeriesHook(["item"]), + /** @type {SyncHook<[T]>} */ + started: new SyncHook(["item"]), + /** @type {SyncHook<[T, Error, R]>} */ + result: new SyncHook(["item", "error", "result"]) + }; + + this._ensureProcessing = this._ensureProcessing.bind(this); + } + + /** + * @param {T} item an item + * @param {Callback<R>} callback callback function + * @returns {void} + */ + add(item, callback) { + if (this._stopped) return callback(new WebpackError("Queue was stopped")); + this.hooks.beforeAdd.callAsync(item, err => { + if (err) { + callback( + makeWebpackError(err, `AsyncQueue(${this._name}).hooks.beforeAdd`) + ); + return; + } + const key = this._getKey(item); + const entry = this._entries.get(key); + if (entry !== undefined) { + if (entry.state === DONE_STATE) { + if (inHandleResult++ > 3) { + process.nextTick(() => callback(entry.error, entry.result)); + } else { + callback(entry.error, entry.result); + } + inHandleResult--; + } else if (entry.callbacks === undefined) { + entry.callbacks = [callback]; + } else { + entry.callbacks.push(callback); + } + return; + } + const newEntry = new AsyncQueueEntry(item, callback); + if (this._stopped) { + this.hooks.added.call(item); + this._root._activeTasks++; + process.nextTick(() => + this._handleResult(newEntry, new WebpackError("Queue was stopped")) + ); + } else { + this._entries.set(key, newEntry); + this._queued.enqueue(newEntry); + const root = this._root; + root._needProcessing = true; + if (root._willEnsureProcessing === false) { + root._willEnsureProcessing = true; + setImmediate(root._ensureProcessing); + } + this.hooks.added.call(item); + } + }); + } + + /** + * @param {T} item an item + * @returns {void} + */ + invalidate(item) { + const key = this._getKey(item); + const entry = + /** @type {AsyncQueueEntry<T, K, R>} */ + (this._entries.get(key)); + this._entries.delete(key); + if (entry.state === QUEUED_STATE) { + this._queued.delete(entry); + } + } + + /** + * Waits for an already started item + * @param {T} item an item + * @param {Callback<R>} callback callback function + * @returns {void} + */ + waitFor(item, callback) { + const key = this._getKey(item); + const entry = this._entries.get(key); + if (entry === undefined) { + return callback( + new WebpackError( + "waitFor can only be called for an already started item" + ) + ); + } + if (entry.state === DONE_STATE) { + process.nextTick(() => callback(entry.error, entry.result)); + } else if (entry.callbacks === undefined) { + entry.callbacks = [callback]; + } else { + entry.callbacks.push(callback); + } + } + + /** + * @returns {void} + */ + stop() { + this._stopped = true; + const queue = this._queued; + this._queued = new ArrayQueue(); + const root = this._root; + for (const entry of queue) { + this._entries.delete(this._getKey(entry.item)); + root._activeTasks++; + this._handleResult(entry, new WebpackError("Queue was stopped")); + } + } + + /** + * @returns {void} + */ + increaseParallelism() { + const root = this._root; + root._parallelism++; + /* istanbul ignore next */ + if (root._willEnsureProcessing === false && root._needProcessing) { + root._willEnsureProcessing = true; + setImmediate(root._ensureProcessing); + } + } + + /** + * @returns {void} + */ + decreaseParallelism() { + const root = this._root; + root._parallelism--; + } + + /** + * @param {T} item an item + * @returns {boolean} true, if the item is currently being processed + */ + isProcessing(item) { + const key = this._getKey(item); + const entry = this._entries.get(key); + return entry !== undefined && entry.state === PROCESSING_STATE; + } + + /** + * @param {T} item an item + * @returns {boolean} true, if the item is currently queued + */ + isQueued(item) { + const key = this._getKey(item); + const entry = this._entries.get(key); + return entry !== undefined && entry.state === QUEUED_STATE; + } + + /** + * @param {T} item an item + * @returns {boolean} true, if the item is currently queued + */ + isDone(item) { + const key = this._getKey(item); + const entry = this._entries.get(key); + return entry !== undefined && entry.state === DONE_STATE; + } + + /** + * @returns {void} + */ + _ensureProcessing() { + while (this._activeTasks < this._parallelism) { + const entry = this._queued.dequeue(); + if (entry === undefined) break; + this._activeTasks++; + entry.state = PROCESSING_STATE; + this._startProcessing(entry); + } + this._willEnsureProcessing = false; + if (this._queued.length > 0) return; + if (this._children !== undefined) { + for (const child of this._children) { + while (this._activeTasks < this._parallelism) { + const entry = child._queued.dequeue(); + if (entry === undefined) break; + this._activeTasks++; + entry.state = PROCESSING_STATE; + child._startProcessing(entry); + } + if (child._queued.length > 0) return; + } + } + if (!this._willEnsureProcessing) this._needProcessing = false; + } + + /** + * @param {AsyncQueueEntry<T, K, R>} entry the entry + * @returns {void} + */ + _startProcessing(entry) { + this.hooks.beforeStart.callAsync(entry.item, err => { + if (err) { + this._handleResult( + entry, + makeWebpackError(err, `AsyncQueue(${this._name}).hooks.beforeStart`) + ); + return; + } + let inCallback = false; + try { + this._processor(entry.item, (e, r) => { + inCallback = true; + this._handleResult(entry, e, r); + }); + } catch (err) { + if (inCallback) throw err; + this._handleResult(entry, err, null); + } + this.hooks.started.call(entry.item); + }); + } + + /** + * @param {AsyncQueueEntry<T, K, R>} entry the entry + * @param {WebpackError=} err error, if any + * @param {R=} result result, if any + * @returns {void} + */ + _handleResult(entry, err, result) { + this.hooks.result.callAsync(entry.item, err, result, hookError => { + const error = hookError + ? makeWebpackError(hookError, `AsyncQueue(${this._name}).hooks.result`) + : err; + + const callback = entry.callback; + const callbacks = entry.callbacks; + entry.state = DONE_STATE; + entry.callback = undefined; + entry.callbacks = undefined; + entry.result = result; + entry.error = error; + + const root = this._root; + root._activeTasks--; + if (root._willEnsureProcessing === false && root._needProcessing) { + root._willEnsureProcessing = true; + setImmediate(root._ensureProcessing); + } + + if (inHandleResult++ > 3) { + process.nextTick(() => { + callback(error, result); + if (callbacks !== undefined) { + for (const callback of callbacks) { + callback(error, result); + } + } + }); + } else { + callback(error, result); + if (callbacks !== undefined) { + for (const callback of callbacks) { + callback(error, result); + } + } + } + inHandleResult--; + }); + } + + clear() { + this._entries.clear(); + this._queued.clear(); + this._activeTasks = 0; + this._willEnsureProcessing = false; + this._needProcessing = false; + this._stopped = false; + } +} + +module.exports = AsyncQueue; |
