<?php // -*- mode:php; tab-width:4; indent-tabs-mode:t; c-basic-offset:4; -*-
#CMS - CMS Made Simple
#(c)2004-2008 by Ted Kulp (ted@cmsmadesimple.org)
#This project's homepage is: http://cmsmadesimple.org
#
#This program is free software; you can redistribute it and/or modify
#it under the terms of the GNU General Public License as published by
#the Free Software Foundation; either version 2 of the License, or
#(at your option) any later version.
#
#This program is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#GNU General Public License for more details.
#You should have received a copy of the GNU General Public License
#along with this program; if not, write to the Free Software
#Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
#$Id$
#
#File apapted from (do not remove the copyright below!): 
#
#@version profiler.php 5270 2006-10-02 03:30:29Z webImagery
#@package Joomla
#@copyright Copyright (C) 2005 - 2006 Open Source Matters. All rights reserved.
#@license GNU/GPL, see LICENSE.php
#Joomla! is free software. This version may have been modified pursuant
#to the GNU General Public License, and as distributed it includes or
#is derivative of works licensed under the GNU General Public License or
#other free or open source software licenses.
#See COPYRIGHT.php for copyright notices and details.
 
/**
 * Class for handling profiling of various aspects of the system.
 *
 * @author Ted Kulp
 * @since 2.0
 * @version $Revision$
 * @modifiedby $LastChangedBy$
 * @lastmodified $Date$
 * @license GPL
 **/
class CmsProfiler extends CmsObject
{
  /**
   * Constructor
   *
   * @access protected
   * @param string Prefix for mark messages
   **/
  function __construct( $prefix = '', $start_time = null )
  {
    $this->_start = ($start_time == null ? $this->get_microtime() : $start_time);
    $this->_prefix = $prefix;
    $this->_buffer = array();
  }
  
  /**
   * Returns a reference to the global Profiler object, only creating it
   * if it doesn't already exist.
   *
   * This method must be invoked as:
   *              <pre>  $browser = CmsProfiler::getInstance([$prefix]);</pre>
   *
   * @access public
   * @return CmsProfiler  The Profiler object.
   **/
  public static function get_instance($prefix = '', $start_time = null)
  {
    static $instances;
 
    if (!isset($instances))
    {
      $instances = array();
    }
 
    if (empty($instances[$prefix]))
    {
      $instances[$prefix] = new CmsProfiler($prefix, $start_time);
    }
 
    return $instances[$prefix];
  }
 
  /**
   * Output a time mark
   *
   * @access public
   * @var string A label for the time mark
   **/
  function mark( $label )
  {
    $mark = @sprintf ( "\n<div class=\"profiler\">$this->_prefix %.4f $label</div>", $this->get_microtime() - $this->_start );
    $this->_buffer[] = $mark;
    return $mark;
  }
  
  function get_time()
  {
    return sprintf("%.4f", $this->get_microtime() - $this->_start);
  }
  
  /**
   * Reports on the buffered marks
   *
   * @access public
   * @param string Glue string
   **/
  function report( $memory = true, $database = true, $glue='' )
  {
    //$db = cms_db();
    
    echo '<div id="profiler_output" style="font-size: .75em;">';
 
    echo implode( $glue, $this->_buffer );
    if ($memory)
    {
      echo '<br />';
      echo $this->get_memory();
    }
    if ($database)
    {
      echo '<br />' . CmsDatabase::query_count() . ' queries executed';
    }
    
    echo '</div>';
  }
  
  /**
   *
   * @access public
   * @return float The current time
   **/
  public static function get_microtime()
  {
    list( $usec, $sec ) = explode( ' ', microtime() );
    return ((float)$usec + (float)$sec);
  }
  
  /**
   *
   * @access public
   * @return int The memory usage
   **/
  public static function get_memory()
  {
    static $isWin;
 
    if (function_exists( 'memory_get_usage' ))
    {
      return memory_get_usage();
    }
    else
    {
      if (is_null( $isWin ))
      {
        $isWin = (substr(PHP_OS, 0, 3) == 'WIN');
      }
      if ($isWin)
      {
        // Windows workaround
        $output = array();
        $pid = getmypid();
        exec( 'tasklist /FI "PID eq ' . $pid . '" /FO LIST', $output );
        if (!isset($output[5]))
        {
          $output[5] = null;
        }
        return substr( $output[5], strpos( $output[5], ':' ) + 1 );
      }
      else
      {
        return 0;
      }
    }
  }
}
 
# vim:ts=4 sw=4 noet
?>