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110 lines
2.8 KiB
PHTML
110 lines
2.8 KiB
PHTML
8 months ago
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<?php
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/**
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* @package Freemius
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* @copyright Copyright (c) 2015, Freemius, Inc.
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* @license https://www.gnu.org/licenses/gpl-3.0.html GNU General Public License Version 3
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* @since 2.5.1
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*/
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if ( ! defined( 'ABSPATH' ) ) {
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exit;
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}
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/**
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* Class FS_Lock
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*
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* @author Vova Feldman (@svovaf)
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* @since 2.5.1
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*/
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class FS_Lock {
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/**
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* @var int Random ID representing the current PHP thread.
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*/
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private static $_thread_id;
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/**
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* @var string
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*/
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private $_lock_id;
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/**
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* @param string $lock_id
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*/
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function __construct( $lock_id ) {
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if ( ! fs_starts_with( $lock_id, WP_FS___OPTION_PREFIX ) ) {
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$lock_id = WP_FS___OPTION_PREFIX . $lock_id;
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}
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$this->_lock_id = $lock_id;
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if ( ! isset( self::$_thread_id ) ) {
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self::$_thread_id = mt_rand( 0, 32000 );
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}
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}
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/**
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* Try to acquire lock. If the lock is already set or is being acquired by another locker, don't do anything.
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*
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* @param int $expiration
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*
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* @return bool TRUE if successfully acquired lock.
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*/
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function try_lock( $expiration = 0 ) {
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if ( $this->is_locked() ) {
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// Already locked.
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return false;
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}
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set_site_transient( $this->_lock_id, self::$_thread_id, $expiration );
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if ( $this->has_lock() ) {
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$this->lock($expiration);
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return true;
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}
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return false;
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}
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/**
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* Acquire lock regardless if it's already acquired by another locker or not.
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*
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* @author Vova Feldman (@svovaf)
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* @since 2.1.0
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*
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* @param int $expiration
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*/
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function lock( $expiration = 0 ) {
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set_site_transient( $this->_lock_id, true, $expiration );
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}
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/**
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* Checks if lock is currently acquired.
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*
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* @author Vova Feldman (@svovaf)
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* @since 2.1.0
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*
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* @return bool
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*/
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function is_locked() {
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return ( false !== get_site_transient( $this->_lock_id ) );
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}
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/**
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* Unlock the lock.
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*
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* @author Vova Feldman (@svovaf)
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* @since 2.1.0
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*/
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function unlock() {
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delete_site_transient( $this->_lock_id );
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}
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/**
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* Checks if lock is currently acquired by the current locker.
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*
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* @return bool
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*/
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protected function has_lock() {
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return ( self::$_thread_id == get_site_transient( $this->_lock_id ) );
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}
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}
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