Updated copyright:

[core.git] / inc / classes / main / rng / class_RandomNumberGenerator.php

diff --git a/inc/classes/main/rng/class_RandomNumberGenerator.php b/inc/classes/main/rng/class_RandomNumberGenerator.php
index 0580b87db376c9b974aac8e367d50addadd72908..fb74071e3931f5cb57ec2ff386960ad4fe8dd658 100644 (file)
--- a/inc/classes/main/rng/class_RandomNumberGenerator.php
+++ b/inc/classes/main/rng/class_RandomNumberGenerator.php
@@ -2,11 +2,11 @@
 /**
  * A standard random number generator
  *
- * @author             Roland Haeder <webmaster@ship-simu.org>
+ * @author             Roland Haeder <webmaster@shipsimu.org>
  * @version            0.0.0
- * @copyright  Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2011 Core Developer Team
+ * @copyright  Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2015 Core Developer Team
  * @license            GNU GPL 3.0 or any newer version
- * @link               http://www.ship-simu.org
+ * @link               http://www.shipsimu.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
@@ -47,6 +47,11 @@ class RandomNumberGenerator extends BaseFrameworkSystem {
         */
        private $rndStrLen = 0;
 
+       /**
+        * Self instance
+        */
+       private static $selfInstance = NULL;
+
        /**
         * Protected constructor
         *
@@ -65,11 +70,20 @@ class RandomNumberGenerator extends BaseFrameworkSystem {
         * @return      $rngInstance    An instance of this random number generator
         */
        public static final function createRandomNumberGenerator (FrameworkInterface $extraInstance = NULL) {
-               // Get a new instance
-               $rngInstance = new RandomNumberGenerator();
+               // Is self instance set?
+               if (is_null(self::$selfInstance)) {
+                       // Get a new instance
+                       $rngInstance = new RandomNumberGenerator();
 
-               // Initialize the RNG now
-               $rngInstance->initRng($extraInstance);
+                       // Initialize the RNG now
+                       $rngInstance->initRng($extraInstance);
+
+                       // Set it "self"
+                       self::$selfInstance = $rngInstance;
+               } else {
+                       // Use from self instance
+                       $rngInstance = self::$selfInstance;
+               }
 
                // Return the instance
                return $rngInstance;
@@ -91,7 +105,7 @@ class RandomNumberGenerator extends BaseFrameworkSystem {
                $this->extraNumber = ($this->prime * $this->prime / pow(pi(), 2));
 
                // Seed mt_rand()
-               mt_srand((double) sqrt(microtime(true) * 100000000 * $this->extraNumber));
+               mt_srand((double) sqrt(microtime(TRUE) * 100000000 * $this->extraNumber));
 
                // Set the server IP to cluster
                $serverIp = 'cluster';