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<?php
/**
* @file
* A stub lock implementation to be used during the installation
* process when database access is not yet available. Because Drupal's
* install system should never be running in more than on concurrant
* request, we can bypass any need for locking.
*/
/**
* Initialize the locking system.
*/
function lock_init() {
}
/**
* Acquire (or renew) a lock, but do not block if it fails.
*
* @return
* TRUE if the lock was acquired, FALSE if it failed.
*/
function lock_acquire($name, $timeout = 30.0) {
return TRUE;
}
/**
* Check if lock acquired by a different process may be available.
*
* @return
* TRUE if there is no lock or it was removed, FALSE otherwise.
*/
function lock_may_be_available($name) {
return TRUE;
}
/**
* Wait for a lock to be available.
*
* @return
* TRUE if the lock holds, FALSE if it is available.
*/
function lock_wait($name, $delay = 30) {
return FALSE;
}
/**
* Release a lock previously acquired by lock_acquire().
*
* This will release the named lock if it is still held by the current request.
*
* @param $name
* The name of the lock.
*/
function lock_release($name) {
}
/**
* Release all previously acquired locks.
*/
function lock_release_all($lock_id = NULL) {
}