并发控制
Tento skript by neměl být instalován přímo. Jedná se o knihovnu, kterou by měly jiné skripty využívat pomocí meta příkazu // @require https://update.greasyfork.org/scripts/565266/1749341/GM_pLimit.js
(function () {
/**
* yocto-queue
* https://www.npmjs.com/package/yocto-queue
*/
class Node{value;next;constructor(value){this.value=value}}class Queue{#head;#tail;#size;constructor(){this.clear()}enqueue(value){const node=new Node(value);if(this.#head){this.#tail.next=node;this.#tail=node}else{this.#head=node;this.#tail=node}this.#size++}dequeue(){const current=this.#head;if(!current){return}this.#head=this.#head.next;this.#size--;if(!this.#head){this.#tail=undefined}return current.value}peek(){if(!this.#head){return}return this.#head.value}clear(){this.#head=undefined;this.#tail=undefined;this.#size=0}get size(){return this.#size}*[Symbol.iterator](){let current=this.#head;while(current){yield current.value;current=current.next}}*drain(){while(this.#head){yield this.dequeue()}}}
/**
* p-limit
* https://www.npmjs.com/package/p-limit
*/
function pLimit(concurrency){let rejectOnClear=false;if(typeof concurrency==="object"){({concurrency,rejectOnClear=false}=concurrency)}validateConcurrency(concurrency);if(typeof rejectOnClear!=="boolean"){throw new TypeError("Expected `rejectOnClear` to be a boolean");}const queue=new Queue();let activeCount=0;const resumeNext=()=>{if(activeCount<concurrency&&queue.size>0){activeCount++;queue.dequeue().run()}};const next=()=>{activeCount--;resumeNext()};const run=async(function_,resolve,arguments_)=>{const result=(async()=>function_(...arguments_))();resolve(result);try{await result}catch{}next()};const enqueue=(function_,resolve,reject,arguments_)=>{const queueItem={reject};new Promise((internalResolve)=>{queueItem.run=internalResolve;queue.enqueue(queueItem)}).then(run.bind(undefined,function_,resolve,arguments_));if(activeCount<concurrency){resumeNext()}};const generator=(function_,...arguments_)=>new Promise((resolve,reject)=>{enqueue(function_,resolve,reject,arguments_)});Object.defineProperties(generator,{activeCount:{get:()=>activeCount,},pendingCount:{get:()=>queue.size,},clearQueue:{value(){if(!rejectOnClear){queue.clear();return}const abortError=AbortSignal.abort().reason;while(queue.size>0){queue.dequeue().reject(abortError)}},},concurrency:{get:()=>concurrency,set(newConcurrency){validateConcurrency(newConcurrency);concurrency=newConcurrency;queueMicrotask(()=>{while(activeCount<concurrency&&queue.size>0){resumeNext()}})},},map:{async value(iterable,function_){const promises=Array.from(iterable,(value,index)=>this(function_,value,index),);return Promise.all(promises)},},});return generator}function limitFunction(function_,options){const limit=pLimit(options);return(...arguments_)=>limit(()=>function_(...arguments_))}function validateConcurrency(concurrency){if(!((Number.isInteger(concurrency)||concurrency===Number.POSITIVE_INFINITY)&&concurrency>0)){throw new TypeError("Expected `concurrency` to be a number from 1 and up",);}}
window.GM_pLimit = pLimit;
})();