Pfthb

I am confused by the results from the following simplified code.

A Threaded object MyPool is to instantiate a variable number of MyWorker objects. As each MyWorker object is correctly instantiated, it should increment the $counter inside the MyPool class, to reflect how many correctly instantiated workers there are.

When called from inside a MyWorker object, the increaseCounter() function appears to execute (as per echo statement), but has no affect on the $counter property. However calling the same from the main thread works as expected.

How do I implement this simple concept?

<?php

error_reporting(E_ALL & ~E_NOTICE);

class MyPool extends Threaded

 public static $counter;
 public $workers;

 public function __construct()
 
 self::$counter = (int) 0;

 $workers = new MyWorker();
 $workers = new MyWorker();
 $workers = new MyWorker();

 $workers[0]->start();
 $workers[1]->start();
 $workers[2]->start();
 

 public static function getCounter()
 
 return self::$counter;
 

 public static function increaseCounter()
 
 self::$counter++;
 echo "counter has been increased inside MyPooln";
 


class MyWorker extends Worker

 public function __construct()
 
 

 public function run()
 
 // do something then
 $this->WorkerActive();
 

 public function WorkerActive()
 
 MyPool::$counter++;
 MyPool::increaseCounter();
 


$MyPool = new MyPool();

echo "counter = ".MyPool::$counter."n";
echo "counter = ".$MyPool->getCounter()."n";
echo "counter = ".MyPool::getCounter()."n";

MyPool::$counter++;
MyPool::increaseCounter();

echo "counter = ".MyPool::$counter."n";
echo "counter = ".$MyPool->getCounter()."n";
echo "counter = ".MyPool::getCounter()."n";

The output is:

counter has been increased inside MyPool
counter has been increased inside MyPool
counter has been increased inside MyPool
counter = 0
counter = 0
counter = 0
counter has been increased inside MyPool
counter = 2
counter = 2
counter = 2

In pthreads static properties are thread-local and not shared between threads. Switch $counter property to object scope will help.