X-Git-Url: https://git.piment-noir.org/?a=blobdiff_plain;f=src%2Futils.ts;h=80e6b9f3b5473dee9e5547930f05ce8b6b473631;hb=47c9cec4c0a1a871153e1811ec6d95c90d2c86d1;hp=7ac4ab25db67446a49b2fc42a0f219c043d4af6f;hpb=53b1b2fc0c935c958a4b6a36223dbdc44c24d926;p=poolifier.git

diff --git a/src/utils.ts b/src/utils.ts
index 7ac4ab25..80e6b9f3 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -1,8 +1,9 @@
-import os from 'node:os'
+import { cpus, availableParallelism as parallelism } from 'node:os'
 import type {
   MeasurementStatisticsRequirements,
   WorkerChoiceStrategyOptions
 } from './pools/selection-strategies/selection-strategies-types'
+import type { KillBehavior } from './worker/worker-options'
 
 /**
  * An intentional empty function.
@@ -40,11 +41,11 @@ export const DEFAULT_MEASUREMENT_STATISTICS_REQUIREMENTS: MeasurementStatisticsR
 export const availableParallelism = (): number => {
   let availableParallelism = 1
   try {
-    availableParallelism = os.availableParallelism()
+    availableParallelism = parallelism()
   } catch {
-    const cpus = os.cpus()
-    if (Array.isArray(cpus) && cpus.length > 0) {
-      availableParallelism = cpus.length
+    const numberOfCpus = cpus()
+    if (Array.isArray(numberOfCpus) && numberOfCpus.length > 0) {
+      availableParallelism = numberOfCpus.length
     }
   }
   return availableParallelism
@@ -95,3 +96,30 @@ export const isPlainObject = (obj: unknown): boolean =>
   obj !== null &&
   obj?.constructor === Object &&
   Object.prototype.toString.call(obj) === '[object Object]'
+
+/**
+ * Detects whether the given value is a kill behavior or not.
+ *
+ * @typeParam KB - Which specific KillBehavior type to test against.
+ * @param killBehavior - Which kind of kill behavior to detect.
+ * @param value - Any value.
+ * @returns `true` if `value` was strictly equals to `killBehavior`, otherwise `false`.
+ */
+export const isKillBehavior = <KB extends KillBehavior>(
+  killBehavior: KB,
+  value: unknown
+): value is KB => {
+  return value === killBehavior
+}
+
+/**
+ * Detects whether the given value is an asynchronous function or not.
+ *
+ * @param fn - Any value.
+ * @returns `true` if `fn` was an asynchronous function, otherwise `false`.
+ */
+export const isAsyncFunction = (
+  fn: unknown
+): fn is (...args: unknown[]) => Promise<unknown> => {
+  return typeof fn === 'function' && fn.constructor.name === 'AsyncFunction'
+}