docs: refine FIXME comment

[poolifier.git] / src / utils.ts

diff --git a/src/utils.ts b/src/utils.ts
index 1b657bce22acaf49a39552f411f1bc4899834777..80e6b9f3b5473dee9e5547930f05ce8b6b473631 100644 (file)
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -1,4 +1,4 @@
-import os from 'node:os'
+import { cpus, availableParallelism as parallelism } from 'node:os'
 import type {
   MeasurementStatisticsRequirements,
   WorkerChoiceStrategyOptions
@@ -41,11 +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
@@ -111,3 +111,15 @@ export const isKillBehavior = <KB extends KillBehavior>(
 ): 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'
+}