note 82277 added to function.Memcache-add

memcache has no locking mechanism, but you could implement it manually. basic locking through the add method: <?php // locks time out after 5 seconds Define( 'LOCK_TIMEOUT', 5 ); $lock = $memcache->add( 'lock:' . $key, 1, false, LOCK_TIMEOUT ); if ( $lock ) { // no lock on this key, so do what you want $value = $memcache->get( $key ); $memcache->set( $key, $value+1 ); // release lock $memcache->delete( 'lock:' . $key ); } else { // variable is currently locked, so do something else } ?> furthermore, you could implement a loop which checks if there is a lock, and if there is, wait some time and try again, until the lock is free. remember: locking will heavily increase your memcache hits and obviously is not what memcache is made for. altough it's not possible for a lock to be forgotten (there's a timeout after all) there is the possibility to get locked out for a very long time. an alternative may be to implement locking through apc_add (or shared memory), but i've never tried it. if you absolutley have to implement locks, memcached is probably the wrong solution anyway. ---- Server IP: 81.223.48.75 Probable Submitter: 213.129.231.122 ---- Manual Page -- http://www.php.net/manual/en/function.Memcache-add.php Edit -- https://master.php.net/note/edit/82277 Del: integrated -- https://master.php.net/note/delete/82277/integrated Del: useless -- https://master.php.net/note/delete/82277/useless Del: bad code -- https://master.php.net/note/delete/82277/bad+code Del: spam -- https://master.php.net/note/delete/82277/spam Del: non-english -- https://master.php.net/note/delete/82277/non-english Del: in docs -- https://master.php.net/note/delete/82277/in+docs Del: other reasons-- https://master.php.net/note/delete/82277 Reject -- https://master.php.net/note/reject/82277 Search -- https://master.php.net/manage/user-notes.php