class.ilShm.php

Go to the documentation of this file.

<?php

require_once('./Services/GlobalCache/classes/class.ilGlobalCacheService.php');

class ilShm extends ilGlobalCacheService
{

    protected static $shm_id = null;
    protected static $block_size = 0;


    protected function getActive()
    {
        self::$active = function_exists('shmop_open');
    }


    protected function getInstallable()
    {
        return false;
        self::$active = function_exists('shmop_open');
    }


    public function __construct($service_id, $component)
    {
        parent::__construct($service_id, $component);
        self::$shm_id = shmop_open(0xff3, "c", 0644, 100);
        self::$block_size = shmop_size(self::$shm_id);
    }


    public function exists($key)
    {
        return shm_has_var(self::$shm_id, $key);
    }


    public function set($key, $serialized_value, $ttl = null)
    {
        return shmop_write(self::$shm_id, $key, $serialized_value);
    }


    public function get($key)
    {
        return shmop_read(self::$shm_id, 0, self::$block_size);
    }


    public function delete($key)
    {
        return shm_remove_var(self::$shm_id, $key);
    }


    public function flush($complete = false)
    {
        // currently a partial flushing is missing
        shmop_delete(self::$shm_id);

        return true;
    }


    public function serialize($value)
    {
        return serialize($value);
    }


    public function unserialize($serialized_value)
    {
        return unserialize($serialized_value);
    }
}