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<?php
namespace Pheanstalk\Socket;
/**
* A limited history of recent socket write length/success.
*
* Facilitates retrying zero-length writes a limited number of times,
* avoiding infinite loops.
*
* Based on a patch from https://github.com/leprechaun
* https://github.com/pda/pheanstalk/pull/24
*
* A bitfield could be used instead of an array for efficiency.
*
* @author Paul Annesley
*/
class WriteHistory
{
private $limit;
private $data = [];
public function __construct(int $limit)
{
$this->limit = $limit;
}
/**
* Whether the history has reached its limit of entries.
*/
public function isFull(): bool
{
return count($this->data) >= $this->limit;
}
public function hasWrites(): bool
{
return (bool) array_sum($this->data);
}
public function isFullWithNoWrites(): bool
{
return $this->isFull() && !$this->hasWrites();
}
/**
* Logs the return value from a write call.
*/
public function log($write): void
{
if ($this->isFull()) {
array_shift($this->data);
}
$this->data[] = (int) $write;
}
}