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<?php
namespace Amp\Parallel\Worker;
/**
* An interface for worker pools.
*/
interface Pool extends Worker
{
/** @var int The default maximum pool size. */
const DEFAULT_MAX_SIZE = 32;
/**
* Gets a worker from the pool. The worker is marked as busy and will only be reused if the pool runs out of
* idle workers. The worker will be automatically marked as idle once no references to the returned worker remain.
*
* @return \Amp\Parallel\Worker\Worker
*
* @throws \Amp\Parallel\Context\StatusError If the queue is not running.
*/
public function getWorker(): Worker;
/**
* Gets the number of workers currently running in the pool.
*
* @return int The number of workers.
*/
public function getWorkerCount(): int;
/**
* Gets the number of workers that are currently idle.
*
* @return int The number of idle workers.
*/
public function getIdleWorkerCount(): int;
/**
* Gets the maximum number of workers the pool may spawn to handle concurrent tasks.
*
* @return int The maximum number of workers.
*/
public function getMaxSize(): int;
}
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