Vfrdtyky

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.