class.ilShm.php

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<?php

class ilShm extends ilGlobalCacheService
{
    protected static int $shm_id;
    protected static int $block_size = 0;

    protected function getActive(): bool
    {
        return function_exists('shmop_open');
    }

    protected function getInstallable(): bool
    {
        return false;
    }

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

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


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


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

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

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

        return true;
    }

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

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