What are some potential pitfalls of using the Stackable class in PHP for multi-threading?

One potential pitfall of using the Stackable class in PHP for multi-threading is that it can lead to race conditions if multiple threads try to access and modify the same data simultaneously. To solve this issue, you can use locks to synchronize access to shared resources and prevent conflicts. 

```php
<?php

class SharedData extends Stackable {
    private $data;
    private $lock;

    public function __construct() {
        $this->data = [];
        $this->lock = new Mutex();
    }

    public function addData($value) {
        $this->lock->lock();
        $this->data[] = $value;
        $this->lock->unlock();
    }

    public function getData() {
        $this->lock->lock();
        $data = $this->data;
        $this->lock->unlock();
        return $data;
    }
}

$sharedData = new SharedData();

class MyThread extends Thread {
    private $sharedData;

    public function __construct($sharedData) {
        $this->sharedData = $sharedData;
    }

    public function run() {
        $this->sharedData->addData($this->getThreadId());
    }
}

$threads = [];
for ($i = 0; $i < 5; $i++) {
    $threads[$i] = new MyThread($sharedData);
    $threads[$i]->start();
}

foreach ($threads as $thread) {
    $thread->join();
}

var_dump($sharedData->getData());
```

In this code snippet, we create a `SharedData` class that extends `Stackable` and uses a `Mutex` lock to synchronize access to the shared data array. Each thread created by the `MyThread` class adds its thread ID to the shared data array using the `addData` method. Finally, we join all threads and output the contents of the shared data array.

Keywords

Stackable class PHP multi-threading concurrency synchronization

Related Questions