root/releases/elgg0.8rc2/lib/adodb/adodb-memcache.lib.inc.php

<?php

// security - hide paths
if (!defined('ADODB_DIR')) die();

global $ADODB_INCLUDED_MEMCACHE;
$ADODB_INCLUDED_MEMCACHE = 1;

/* 

  V4.90 8 June 2006  (c) 2000-2006 John Lim (jlim#natsoft.com.my). All rights reserved.
  Released under both BSD license and Lesser GPL library license. 
  Whenever there is any discrepancy between the two licenses, 
  the BSD license will take precedence. See License.txt. 
  Set tabs to 4 for best viewing.
  
  Latest version is available at http://adodb.sourceforge.net
  
*/

    function &getmemcache($key,&$err, $timeout=0, $host, $port)
    {
        $false = false;
        $err = false;

        if (!function_exists('memcache_pconnect')) {
            $err = 'Memcache module PECL extension not found!';
            return $false;
        }

        $memcache = new Memcache;
        if (!@$memcache->pconnect($host, $port)) {
            $err = 'Can\'t connect to memcache server on: '.$host.':'.$port;
            return $false;
        }

        $rs = $memcache->get($key);
        if (!$rs) {
            $err = 'Item with such key doesn\'t exists on the memcached server.';
            return $false;
        }

        $tdiff = intval($rs->timeCreated+$timeout - time());
        if ($tdiff <= 2) {
            switch($tdiff) {
                case 2: 
                    if ((rand() & 15) == 0) {
                        $err = "Timeout 2";
                        return $false;
                    }
                    break;
                case 1:
                    if ((rand() & 3) == 0) {
                        $err = "Timeout 1";
                        return $false;
                    }
                    break;
                default: 
                    $err = "Timeout 0";
                    return $false;
            }
        }
        return $rs;
    }

    function putmemcache($key, $rs, $host, $port, $compress, $debug=false)
    {
        $false = false;
        $true = true;

        if (!function_exists('memcache_pconnect')) {
            if ($debug) ADOConnection::outp(" Memcache module PECL extension not found!<br>\n");
            return $false;
        }

        $memcache = new Memcache;
        if (!@$memcache->pconnect($host, $port)) {
            if ($debug) ADOConnection::outp(" Can't connect to memcache server on: $host:$port<br>\n");
            return $false;
        }

        $rs->timeCreated = time();
        if (!$memcache->set($key, $rs, $compress, 0)) {
            if ($debug) ADOConnection::outp(" Failed to save data at the memcached server!<br>\n");
            return $false;
        }
        return $true;
    }

    function flushmemcache($key=false, $host, $port, $debug=false)
    {
        if (!function_exists('memcache_pconnect')) {
            if ($debug) ADOConnection::outp(" Memcache module PECL extension not found!<br>\n");
            return;
        }

        $memcache = new Memcache;
        if (!@$memcache->pconnect($host, $port)) {
            if ($debug) ADOConnection::outp(" Can't connect to memcache server on: $host:$port<br>\n");
            return;
        }

        if ($key) {
            if (!$memcache->delete($key)) {
                if ($debug) ADOConnection::outp("CacheFlush: $key entery doesn't exist on memcached server!<br>\n");
            } else {
                if ($debug) ADOConnection::outp("CacheFlush: $key entery flushed from memcached server!<br>\n");
            }
        } else {
            if (!$memcache->flush()) {
                if ($debug) ADOConnection::outp("CacheFlush: Failure flushing all enteries from memcached server!<br>\n");
            } else {
                if ($debug) ADOConnection::outp("CacheFlush: All enteries flushed from memcached server!<br>\n");
            }
        }
        return;
    }
?>