Data in storage is not modifying from thread - php

Question

safe storage of data. I read that for this task suits Stackable.
I inherit Stackable but data in storage is not synchronized.
AsyncOperation -- just incrementing value in storage
AsyncWatcher -- just making echo of value in storage.
Problem : data in storage is not modifying from AsyncOperation thread, storage permanently contains a -1.
I'm using pthreads.
class Storage extends Stackable {
public function __construct($data) {
$this->local = $data;
}
public function run()
{
}
public function getData() { return $this->local; }
}
class AsyncOperation extends Thread {
private $arg;
public function __construct(Storage $param){
$this->arg = $param->getData();
}
public function run(){
while (true) {
$this->arg++;
sleep(1);
}
}
}
class AsyncWatcher extends Thread {
public function __construct(Storage $param){
$this->storage = $param -> getData();
}
public function run(){
while (true) {
echo "In storage ". $this->storage ."\n";
sleep(1);
}
}
}
$storage = new Storage(-1);
$thread = new AsyncOperation($storage);
$thread->start();
$watcher = new AsyncWatcher($storage);
$watcher->start();

Answer 1

As you can see, Stackable class has a lot of methods, mainly used for async operations and they can help you with your issue. You should modify your async classes in this way:
class AsyncOperation extends Thread {
private $arg;
public function __construct(Storage $param){
$this->arg = $param->getData();
}
public function run(){
while (true) {
$this->arg++;
sleep(1);
}
$this->synchronized(function($thread){
$thread->notify();
}, $this);
}
}
and their usage will be like this:
$storage = new Storage();
$asyncOp = new AsyncOperation($storage);
$asyncOp->start();
$asyncOp->synchronized(function($thread){
$thread->wait();
}, $asyncOp);
var_dump($storage);