Documentation

Learn how to use TrueAsync for building concurrent PHP applications.

Pool::activeCount

(PHP 8.6+, True Async 1.0)

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

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

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