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✏️ Editing: Lock.php

<?php

namespace Illuminate\Cache;

use Illuminate\Contracts\Cache\Lock as LockContract;
use Illuminate\Contracts\Cache\LockTimeoutException;
use Illuminate\Support\InteractsWithTime;
use Illuminate\Support\Sleep;
use Illuminate\Support\Str;

abstract class Lock implements LockContract
{
    use InteractsWithTime;

/**
     * The name of the lock.
     *
     * @var string
     */
    protected $name;

/**
     * The number of seconds the lock should be maintained.
     *
     * @var int
     */
    protected $seconds;

/**
     * The scope identifier of this lock.
     *
     * @var string
     */
    protected $owner;

/**
     * The number of milliseconds to wait before re-attempting to acquire a lock while blocking.
     *
     * @var int
     */
    protected $sleepMilliseconds = 250;

/**
     * Create a new lock instance.
     *
     * @param  string  $name
     * @param  int  $seconds
     * @param  string|null  $owner
     * @return void
     */
    public function __construct($name, $seconds, $owner = null)
    {
        if (is_null($owner)) {
            $owner = Str::random();
        }

$this->name = $name;
        $this->owner = $owner;
        $this->seconds = $seconds;
    }

/**
     * Attempt to acquire the lock.
     *
     * @return bool
     */
    abstract public function acquire();

/**
     * Release the lock.
     *
     * @return bool
     */
    abstract public function release();

/**
     * Returns the owner value written into the driver for this lock.
     *
     * @return string
     */
    abstract protected function getCurrentOwner();

/**
     * Attempt to acquire the lock.
     *
     * @param  callable|null  $callback
     * @return mixed
     */
    public function get($callback = null)
    {
        $result = $this->acquire();

if ($result && is_callable($callback)) {
            try {
                return $callback();
            } finally {
                $this->release();
            }
        }

return $result;
    }

/**
     * Attempt to acquire the lock for the given number of seconds.
     *
     * @param  int  $seconds
     * @param  callable|null  $callback
     * @return mixed
     *
     * @throws \Illuminate\Contracts\Cache\LockTimeoutException
     */
    public function block($seconds, $callback = null)
    {
        $starting = ((int) now()->format('Uu')) / 1000;

$milliseconds = $seconds * 1000;

while (! $this->acquire()) {
            $now = ((int) now()->format('Uu')) / 1000;

if (($now + $this->sleepMilliseconds - $milliseconds) >= $starting) {
                throw new LockTimeoutException;
            }

Sleep::usleep($this->sleepMilliseconds * 1000);
        }

if (is_callable($callback)) {
            try {
                return $callback();
            } finally {
                $this->release();
            }
        }

return true;
    }

/**
     * Returns the current owner of the lock.
     *
     * @return string
     */
    public function owner()
    {
        return $this->owner;
    }

/**
     * Determines whether this lock is allowed to release the lock in the driver.
     *
     * @return bool
     */
    public function isOwnedByCurrentProcess()
    {
        return $this->isOwnedBy($this->owner);
    }

/**
     * Determine whether this lock is owned by the given identifier.
     *
     * @param  string|null  $owner
     * @return bool
     */
    public function isOwnedBy($owner)
    {
        return $this->getCurrentOwner() === $owner;
    }

/**
     * Specify the number of milliseconds to sleep in between blocked lock acquisition attempts.
     *
     * @param  int  $milliseconds
     * @return $this
     */
    public function betweenBlockedAttemptsSleepFor($milliseconds)
    {
        $this->sleepMilliseconds = $milliseconds;

return $this;
    }
}

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