Pool::activeCount

Number of active resources in the pool.

Pool::activeCount ​

(PHP 8.6+, True Async 1.0)

php
public Pool::activeCount(): int

Returns the number of resources that are currently in use (acquired via acquire() or tryAcquire() and not yet returned via release()).

Parameters ​

This method takes no parameters.

Return Value ​

The number of active resources.

Examples ​

Example #1 Counting active resources ​

php
<?php

use Async\Pool;

$pool = new Pool(
    factory: fn() => new \stdClass(),
    max: 5
);

echo $pool->activeCount() . "\n"; // 0

$r1 = $pool->acquire();
$r2 = $pool->acquire();
echo $pool->activeCount() . "\n"; // 2

$pool->release($r1);
echo $pool->activeCount() . "\n"; // 1

Example #2 Displaying pool statistics ​

php
<?php

use Async\Pool;

function poolStats(Pool $pool): string
{
    return sprintf(
        "Pool: total=%d, active=%d, idle=%d",
        $pool->count(),
        $pool->activeCount(),
        $pool->idleCount()
    );
}

See Also ​