Current File : /home2/selectio/public_html/fms-worksuite/vendor/amphp/parallel/lib/Worker/BasicEnvironment.php
<?php
namespace Amp\Parallel\Worker;
use Amp\Loop;
use Amp\Struct;
final class BasicEnvironment implements Environment
{
/** @var array */
private $data = [];
/** @var \SplPriorityQueue */
private $queue;
/** @var string */
private $timer;
public function __construct()
{
$this->queue = $queue = new \SplPriorityQueue;
$data = &$this->data;
$this->timer = Loop::repeat(1000, static function (string $watcherId) use ($queue, &$data): void {
$time = \time();
while (!$queue->isEmpty()) {
list($key, $expiration) = $queue->top();
if (!isset($data[$key])) {
// Item removed.
$queue->extract();
continue;
}
$struct = $data[$key];
if ($struct->expire === 0) {
// Item was set again without a TTL.
$queue->extract();
continue;
}
if ($struct->expire !== $expiration) {
// Expiration changed or TTL updated.
$queue->extract();
continue;
}
if ($time < $struct->expire) {
// Item at top has not expired, break out of loop.
break;
}
unset($data[$key]);
$queue->extract();
}
if ($queue->isEmpty()) {
Loop::disable($watcherId);
}
});
Loop::disable($this->timer);
Loop::unreference($this->timer);
}
/**
* @param string $key
*
* @return bool
*/
public function exists(string $key): bool
{
return isset($this->data[$key]);
}
/**
* @param string $key
*
* @return mixed|null Returns null if the key does not exist.
*/
public function get(string $key)
{
if (!isset($this->data[$key])) {
return null;
}
$struct = $this->data[$key];
if ($struct->ttl !== null) {
$expire = \time() + $struct->ttl;
if ($struct->expire < $expire) {
$struct->expire = $expire;
$this->queue->insert([$key, $struct->expire], -$struct->expire);
}
}
return $struct->data;
}
/**
* @param string $key
* @param mixed $value Using null for the value deletes the key.
* @param int $ttl Number of seconds until data is automatically deleted. Use null for unlimited TTL.
*
* @throws \Error If the time-to-live is not a positive integer.
*/
public function set(string $key, $value, int $ttl = null): void
{
if ($value === null) {
$this->delete($key);
return;
}
if ($ttl !== null && $ttl <= 0) {
throw new \Error("The time-to-live must be a positive integer or null");
}
$struct = new class {
use Struct;
public $data;
public $expire = 0;
public $ttl;
};
$struct->data = $value;
if ($ttl !== null) {
$struct->ttl = $ttl;
$struct->expire = \time() + $ttl;
$this->queue->insert([$key, $struct->expire], -$struct->expire);
Loop::enable($this->timer);
}
$this->data[$key] = $struct;
}
/**
* @param string $key
*/
public function delete(string $key): void
{
unset($this->data[$key]);
}
/**
* Alias of exists().
*
* @param $key
*
* @return bool
*/
public function offsetExists($key): bool
{
return $this->exists($key);
}
/**
* Alias of get().
*
* @param string $key
*
* @return mixed
*/
#[\ReturnTypeWillChange]
public function offsetGet($key)
{
return $this->get($key);
}
/**
* Alias of set() with $ttl = null.
*
* @param string $key
* @param mixed $value
*/
public function offsetSet($key, $value): void
{
$this->set($key, $value);
}
/**
* Alias of delete().
*
* @param string $key
*/
public function offsetUnset($key): void
{
$this->delete($key);
}
/**
* Removes all values.
*/
public function clear(): void
{
$this->data = [];
Loop::disable($this->timer);
$this->queue = new \SplPriorityQueue;
}
}
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