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| <?php | |
| /* | |
| * This file is part of the php-vfs package. | |
| * | |
| * (c) Michael Donat <michael.donat@me.com> | |
| * | |
| * For the full copyright and license information, please view the LICENSE | |
| * file that was distributed with this source code. | |
| */ | |
| namespace VirtualFileSystem\Structure; | |
| use SplObjectStorage; | |
| /** | |
| * Object representation of File. | |
| * | |
| * @author Michael Donat <michael.donat@me.com> | |
| * @package php-vfs | |
| */ | |
| class File extends Node | |
| { | |
| /** | |
| * @see http://man7.org/linux/man-pages/man2/lstat.2.html | |
| */ | |
| const S_IFTYPE = 0100000; | |
| protected $data; | |
| /** | |
| * Resource with exclusive lock on this file | |
| * @var resource|null | |
| */ | |
| private $exclusiveLock = null; | |
| /** | |
| * Resources with a shared lock on this file | |
| * @var SplObjectStorage | |
| */ | |
| private $sharedLock; | |
| /** | |
| * @inherit | |
| * @param string $basename | |
| */ | |
| public function __construct($basename) | |
| { | |
| parent::__construct($basename); | |
| $this->sharedLock = new SplObjectStorage; | |
| } | |
| /** | |
| * Returns contents size. | |
| * | |
| * @return int | |
| */ | |
| public function size() | |
| { | |
| return strlen($this->data); | |
| } | |
| /** | |
| * Returns contents. | |
| * | |
| * @return null|string | |
| */ | |
| public function data() | |
| { | |
| return $this->data; | |
| } | |
| /** | |
| * Sets contents. | |
| * | |
| * @param $data | |
| * @param null|string $data | |
| */ | |
| public function setData($data) | |
| { | |
| $this->data = $data; | |
| } | |
| public function lock($resource, $operation) | |
| { | |
| if ($this->exclusiveLock === $resource) { | |
| $this->exclusiveLock = null; | |
| } else { | |
| $this->sharedLock->detach($resource); | |
| } | |
| if ($operation & LOCK_NB) { | |
| $operation -= LOCK_NB; | |
| } | |
| $unlock = $operation === LOCK_UN; | |
| $exclusive = $operation === LOCK_EX; | |
| if ($unlock) { | |
| return true; | |
| } | |
| if ($this->exclusiveLock !== null) { | |
| return false; | |
| } | |
| if (!$exclusive) { | |
| $this->sharedLock->attach($resource); | |
| return true; | |
| } | |
| if ($this->sharedLock->count()) { | |
| return false; | |
| } | |
| $this->exclusiveLock = $resource; | |
| return true; | |
| } | |
| } |