97 lines
2.1 KiB
PHP
97 lines
2.1 KiB
PHP
<?php
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/**
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* @file src/Core/Lock.php
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*/
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namespace Friendica\Util;
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/**
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* @file src/Core/Lock.php
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* @brief Functions for preventing parallel execution of functions
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*/
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use Friendica\Core\Config;
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use Friendica\Core\Lock;
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require_once 'include/dba.php';
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/**
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* @brief This class contain Functions for preventing parallel execution of functions
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*/
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class Lock
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{
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/**
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* @var Lock\ILockDriver;
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*/
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static $driver = null;
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public static function init()
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{
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switch(Config::get('system', 'lock_driver', 'default')) {
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case 'memcache':
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self::$driver = new Lock\MemcacheLockDriver();
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break;
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case 'database':
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self::$driver = new Lock\DatabaseLockDriver();
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break;
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case 'semaphore':
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self::$driver = new Lock\SemaphoreLockDriver();
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break;
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default:
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// Determine what's the best/fastest locking driver (default behavior in Friendica)
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if (function_exists('sem_get') && version_compare(PHP_VERSION, '5.6.1', '>=')) {
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self::$driver = new Lock\SemaphoreLockDriver();
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} elseif (Config::get('system', 'cache_driver', 'database') == 'memcache') {
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self::$driver = new Lock\MemcacheLockDriver();
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} else {
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self::$driver = new Lock\DatabaseLockDriver();
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}
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}
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}
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/**
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* Returns the current cache driver
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*
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* @return Lock\ILockDriver;
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*/
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private static function getDriver()
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{
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if (self::$driver === null) {
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self::init();
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}
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return self::$driver;
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}
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/**
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* @brief Acquires a lock for a given name
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*
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* @param string $key Name of the lock
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* @param integer $timeout Seconds until we give up
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*
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* @return boolean Was the lock successful?
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*/
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public static function acquireLock($key, $timeout = 120)
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{
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return self::getDriver()->acquireLock($key, $timeout);
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}
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/**
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* @brief Releases a lock if it was set by us
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*
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* @param string $key Name of the lock
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* @return mixed
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*/
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public static function releaseLock($key)
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{
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return self::getDriver()->releaseLock($key);
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}
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/**
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* @brief Releases all lock that were set by us
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* @return void
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*/
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public static function releaseAll()
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{
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self::getDriver()->releaseAll();
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}
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}
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