X-Git-Url: https://git.piment-noir.org/?a=blobdiff_plain;f=src%2Futils.ts;h=a0a9e530131cbe78df7401dff80452eef16e8634;hb=d91689fda0fa7a85014ac25276cf2cf0a9d81ce2;hp=d39bfa02c8498ed54d8bebc8d9ace5a7a7fd756f;hpb=dc021bcca72f8b4d185d96a301579612fba2793b;p=poolifier.git diff --git a/src/utils.ts b/src/utils.ts index d39bfa02..a0a9e530 100644 --- a/src/utils.ts +++ b/src/utils.ts @@ -1,10 +1,13 @@ import * as os from 'node:os' +import { webcrypto } from 'node:crypto' +import { Worker as ClusterWorker } from 'node:cluster' +import { Worker as ThreadWorker } from 'node:worker_threads' import type { MeasurementStatisticsRequirements, WorkerChoiceStrategyOptions } from './pools/selection-strategies/selection-strategies-types' import type { KillBehavior } from './worker/worker-options' -import type { MeasurementStatistics } from './pools/worker' +import { type IWorker, type WorkerType, WorkerTypes } from './pools/worker' /** * Default task name. @@ -23,7 +26,7 @@ export const EMPTY_FUNCTION: () => void = Object.freeze(() => { */ export const DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS: WorkerChoiceStrategyOptions = { - choiceRetries: 6, + retries: 6, runTime: { median: false }, waitTime: { median: false }, elu: { median: false } @@ -44,37 +47,79 @@ export const DEFAULT_MEASUREMENT_STATISTICS_REQUIREMENTS: MeasurementStatisticsR * Always returns a value greater than zero. * * @returns The host OS optimized maximum pool size. - * @internal */ export const availableParallelism = (): number => { let availableParallelism = 1 try { availableParallelism = os.availableParallelism() } catch { - const numberOfCpus = os.cpus() - if (Array.isArray(numberOfCpus) && numberOfCpus.length > 0) { - availableParallelism = numberOfCpus.length + const cpus = os.cpus() + if (Array.isArray(cpus) && cpus.length > 0) { + availableParallelism = cpus.length } } return availableParallelism } -// /** -// * Computes the retry delay in milliseconds using an exponential back off algorithm. -// * -// * @param retryNumber - The number of retries that have already been attempted -// * @param maxDelayRatio - The maximum ratio of the delay that can be randomized -// * @returns Delay in milliseconds -// * @internal -// */ -// export const exponentialDelay = ( -// retryNumber = 0, -// maxDelayRatio = 0.2 -// ): number => { -// const delay = Math.pow(2, retryNumber) * 100 -// const randomSum = delay * maxDelayRatio * Math.random() // 0-(maxDelayRatio*100)% of the delay -// return delay + randomSum -// } +/** + * Returns the worker type of the given worker. + * + * @param worker - The worker to get the type of. + * @returns The worker type of the given worker. + * @internal + */ +export const getWorkerType = (worker: IWorker): WorkerType | undefined => { + if (worker instanceof ThreadWorker) { + return WorkerTypes.thread + } else if (worker instanceof ClusterWorker) { + return WorkerTypes.cluster + } +} + +/** + * Returns the worker id of the given worker. + * + * @param worker - The worker to get the id of. + * @returns The worker id of the given worker. + * @internal + */ +export const getWorkerId = (worker: IWorker): number | undefined => { + if (worker instanceof ThreadWorker) { + return worker.threadId + } else if (worker instanceof ClusterWorker) { + return worker.id + } +} + +/** + * Sleeps for the given amount of milliseconds. + * + * @param ms - The amount of milliseconds to sleep. + * @returns A promise that resolves after the given amount of milliseconds. + * @internal + */ +export const sleep = async (ms: number): Promise => { + await new Promise(resolve => { + setTimeout(resolve, ms) + }) +} + +/** + * Computes the retry delay in milliseconds using an exponential back off algorithm. + * + * @param retryNumber - The number of retries that have already been attempted + * @param delayFactor - The base delay factor in milliseconds + * @returns Delay in milliseconds + * @internal + */ +export const exponentialDelay = ( + retryNumber = 0, + delayFactor = 100 +): number => { + const delay = Math.pow(2, retryNumber) * delayFactor + const randomSum = delay * 0.2 * secureRandom() // 0-20% of the delay + return delay + randomSum +} /** * Computes the average of the given data set. @@ -125,6 +170,7 @@ export const median = (dataSet: number[]): number => { * @param num - The number to round. * @param scale - The scale to round to. * @returns The rounded number. + * @internal */ export const round = (num: number, scale = 2): number => { const rounder = Math.pow(10, scale) @@ -136,6 +182,7 @@ export const round = (num: number, scale = 2): number => { * * @param obj - The object to check. * @returns `true` if the given object is a plain object, `false` otherwise. + * @internal */ export const isPlainObject = (obj: unknown): boolean => typeof obj === 'object' && @@ -164,6 +211,7 @@ export const isKillBehavior = ( * * @param fn - Any value. * @returns `true` if `fn` was an asynchronous function, otherwise `false`. + * @internal */ export const isAsyncFunction = ( fn: unknown @@ -172,65 +220,57 @@ export const isAsyncFunction = ( } /** - * Updates the given measurement statistics. + * Generates a cryptographically secure random number in the [0,1[ range * - * @param measurementStatistics - The measurement statistics to update. - * @param measurementRequirements - The measurement statistics requirements. - * @param measurementValue - The measurement value. - * @param numberOfMeasurements - The number of measurements. + * @returns A number in the [0,1[ range * @internal */ -export const updateMeasurementStatistics = ( - measurementStatistics: MeasurementStatistics, - measurementRequirements: MeasurementStatisticsRequirements, - measurementValue: number -): void => { - if (measurementRequirements.aggregate) { - measurementStatistics.aggregate = - (measurementStatistics.aggregate ?? 0) + measurementValue - measurementStatistics.minimum = Math.min( - measurementValue, - measurementStatistics.minimum ?? Infinity - ) - measurementStatistics.maximum = Math.max( - measurementValue, - measurementStatistics.maximum ?? -Infinity - ) - if ( - (measurementRequirements.average || measurementRequirements.median) && - measurementValue != null - ) { - measurementStatistics.history.push(measurementValue) - if (measurementRequirements.average) { - measurementStatistics.average = average(measurementStatistics.history) - } - if (measurementRequirements.median) { - measurementStatistics.median = median(measurementStatistics.history) - } - } - } +export const secureRandom = (): number => { + return webcrypto.getRandomValues(new Uint32Array(1))[0] / 0x100000000 } /** - * Executes a function once at a time. + * Returns the minimum of the given numbers. + * If no numbers are given, `Infinity` is returned. * - * @param fn - The function to execute. + * @param args - The numbers to get the minimum of. + * @returns The minimum of the given numbers. + * @internal + */ +export const min = (...args: number[]): number => + args.reduce((minimum, num) => (minimum < num ? minimum : num), Infinity) + +/** + * Returns the maximum of the given numbers. + * If no numbers are given, `-Infinity` is returned. + * + * @param args - The numbers to get the maximum of. + * @returns The maximum of the given numbers. + * @internal + */ +export const max = (...args: number[]): number => + args.reduce((maximum, num) => (maximum > num ? maximum : num), -Infinity) + +/** + * Wraps a function so that it can only be called once. + * + * @param fn - The function to wrap. * @param context - The context to bind the function to. - * @returns The function to execute. - */ -export const once = ( - // eslint-disable-next-line @typescript-eslint/no-explicit-any - fn: (...args: any[]) => void, - context: unknown - // eslint-disable-next-line @typescript-eslint/no-explicit-any -): ((...args: any[]) => void) => { - let called = false - // eslint-disable-next-line @typescript-eslint/no-explicit-any - return function (...args: any[]): void { - if (!called) { - called = true - fn.apply(context, args) - called = false + * @returns The wrapped function. + * @internal + */ +// eslint-disable-next-line @typescript-eslint/no-explicit-any +export const once = ( + fn: (...args: A) => R, + context: T +): ((...args: A) => R) => { + let result: R + return (...args: A) => { + if (fn != null) { + result = fn.apply(context, args) + ;(fn as unknown as undefined) = (context as unknown as undefined) = + undefined } + return result } }