94 lines
1.9 KiB
PHP
94 lines
1.9 KiB
PHP
<?php
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namespace Illuminate\Cache;
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use Illuminate\Support\InteractsWithTime;
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use Illuminate\Contracts\Cache\LockTimeoutException;
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abstract class Lock
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{
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use InteractsWithTime;
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/**
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* The name of the lock.
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*
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* @var string
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*/
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protected $name;
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/**
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* The number of seconds the lock should be maintained.
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*
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* @var int
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*/
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protected $seconds;
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/**
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* Create a new lock instance.
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*
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* @param string $name
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* @param int $seconds
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* @return void
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*/
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public function __construct($name, $seconds)
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{
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$this->name = $name;
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$this->seconds = $seconds;
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}
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/**
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* Attempt to acquire the lock.
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*
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* @return bool
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*/
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abstract public function acquire();
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/**
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* Attempt to acquire the lock.
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*
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* @param callable|null $callback
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* @return bool
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*/
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public function get($callback = null)
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{
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$result = $this->acquire();
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if ($result && is_callable($callback)) {
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return tap($callback(), function () {
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$this->release();
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});
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}
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return $result;
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}
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/**
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* Attempt to acquire the lock for the given number of seconds.
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*
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* @param int $seconds
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* @param callable|null $callback
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* @return bool
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* @throws \Illuminate\Contracts\Cache\LockTimeoutException
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*/
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public function block($seconds, $callback = null)
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{
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$starting = $this->currentTime();
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while (! $this->acquire()) {
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usleep(250 * 1000);
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if ($this->currentTime() - $seconds >= $starting) {
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throw new LockTimeoutException;
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}
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}
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if (is_callable($callback)) {
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return tap($callback(), function () {
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$this->release();
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});
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}
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return true;
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}
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}
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