src/utility-types.ts

   1 import type { Worker as ClusterWorker } from 'node:cluster'
   2 import type { MessagePort } from 'node:worker_threads'
   3 import type { KillBehavior } from './worker/worker-options'
   4 import type { IWorker, Task } from './pools/worker'
   5
   6 /**
   7  * Make all properties in T non-readonly.
   8  */
   9 export type Draft<T> = { -readonly [P in keyof T]?: T[P] }
  10
  11 /**
  12  * Message object that is passed between main worker and worker.
  13  *
  14  * @typeParam Data - Type of data sent to the worker. This can only be serializable data.
  15  * @typeParam MainWorker - Type of main worker.
  16  */
  17 export interface MessageValue<
  18   Data = unknown,
  19   MainWorker extends ClusterWorker | MessagePort | unknown = unknown
  20 > extends Task<Data> {
  21   /**
  22    * Kill code.
  23    */
  24   readonly kill?: KillBehavior | 1
  25   /**
  26    * Error.
  27    */
  28   readonly error?: string
  29   /**
  30    * Runtime.
  31    */
  32   readonly runTime?: number
  33   /**
  34    * Reference to main worker.
  35    *
  36    * Only for internal use.
  37    * @internal
  38    */
  39   readonly parent?: MainWorker
  40 }
  41
  42 /**
  43  * An object holding the execution response promise resolve/reject callbacks.
  44  *
  45  * @typeParam Worker - Type of worker.
  46  * @typeParam Response - Type of execution response. This can only be serializable data.
  47  * @internal
  48  */
  49 export interface PromiseResponseWrapper<
  50   Worker extends IWorker,
  51   Response = unknown
  52 > {
  53   /**
  54    * Resolve callback to fulfill the promise.
  55    */
  56   readonly resolve: (value: Response) => void
  57   /**
  58    * Reject callback to reject the promise.
  59    */
  60   readonly reject: (reason?: string) => void
  61   /**
  62    * The worker handling the execution.
  63    */
  64   readonly worker: Worker
  65 }