组件ThreadPool::getWorkerCount()

ThreadPool::getWorkerCount() ​

(PHP 8.6+, True Async 1.0)

php
public ThreadPool::getWorkerCount(): int

返回池中工作线程的数量。该值在构造时固定，在池的整个生命周期内不会改变。它等于传递给 new ThreadPool() 的 $workers 参数值。

返回值 ​

int — 工作线程数量（与构造函数中设置的一致）。

示例 ​

示例 #1 确认工作线程数量 ​

php
<?php

use Async\ThreadPool;
use function Async\spawn;

spawn(function() {
    $pool = new ThreadPool(workers: 4);

    echo $pool->getWorkerCount(), "\n"; // 4

    $pool->close();
});

示例 #2 根据可用 CPU 核心数调整池大小 ​

php
<?php

use Async\ThreadPool;
use function Async\spawn;
use function Async\await;

spawn(function() {
    $cores = (int) shell_exec('nproc') ?: 4;
    $pool  = new ThreadPool(workers: $cores);

    echo "Pool created with ", $pool->getWorkerCount(), " workers\n";

    $futures = [];
    for ($i = 0; $i < $cores * 2; $i++) {
        $futures[] = $pool->submit(fn() => 'done');
    }
    foreach ($futures as $f) {
        await($f);
    }

    $pool->close();
});

参见 ​