function _lock_id

Helper function to get this request's unique id.

Related topics

1 call to _lock_id()
lock_release_all in includes/lock.inc
Release all previously acquired locks.

File

includes/lock.inc, line 76

Code

function _lock_id() {
    // Do not use drupal_static(). This identifier refers to the current
    // client request, and must not be changed under any circumstances
    // else the shutdown handler may fail to release our locks.
    static $lock_id;
    if (!isset($lock_id)) {
        // Assign a unique id.
        $lock_id = uniqid(mt_rand(), TRUE);
        // We only register a shutdown function if a lock is used.
        drupal_register_shutdown_function('lock_release_all', $lock_id);
    }
    return $lock_id;
}

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