The Volatile class

(PECL pthreads >= 3.0.0)

Introduction

The Volatile class is new to pthreads v3. Its introduction is a consequence of the new immutability semantics of Threaded members of Threaded classes. The Volatile class enables for mutability of its Threaded members, and is also used to store PHP arrays in Threaded contexts.

Class synopsis

class Volatile extends Threaded implements Collectable, Traversable {

/* Inherited methods */

public Threaded::chunk(int $size, bool $preserve): array

public Threaded::count(): int

public Threaded::extend(string $class): bool

public Threaded::isRunning(): bool

public Threaded::isTerminated(): bool

public Threaded::merge(mixed $from, bool $overwrite = ?): bool

public Threaded::notify(): bool

public Threaded::notifyOne(): bool

public Threaded::pop(): bool

public Threaded::run(): void

public Threaded::shift(): mixed

public Threaded::synchronized(Closure $block, mixed ...$args): mixed

public Threaded::wait(int $timeout = ?): bool

}

Examples

Example #1 New immutability semantics of Threaded

<?php

class Task extends Threaded
{
    public function __construct()
    {
        $this->data = new Threaded();

        // attempt to overwrite a Threaded property of a Threaded class (invalid)
        $this->data = new stdClass();
    }
}

var_dump((new Task())->data);

The above example will output something similar to:

RuntimeException: Threaded members previously set to Threaded objects are immutable, cannot overwrite data in %s:%d

Example #2 Volatile use-case

<?php

class Task extends Volatile
{
    public function __construct()
    {
        $this->data = new Threaded();

        // attempt to overwrite a Threaded property of a Volatile class (valid)
        $this->data = new stdClass();
    }
}

var_dump((new Task())->data);

The above example will output something similar to:

object(stdClass)#3 (0) {
}

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User Contributed Notes 1 note

down

synnus at gmail dot com ¶

5 years ago

<?php

// just use extends  volatile for use array
// is verry good 

class libvar extends Volatile
{
    private $_adresse = '127.0.0.1';
    private $_port = 10000;
    
    public $socket;
    public $list_socket = array();
    public $list_error = array();
    
    public function __construct(){ }
    
    public function set_list($val) { $ct = count($this->list_socket); $this->list_socket[ $ct ] = $val; return $ct; }
    public function set_socket($val) { $this->socket = $val; return $this->socket; }
    public function set_error($val) { $this->list_error[ count($this->list_error) ] = $val; }
    
    public function unset_list($val) { unset($this->list_error[ $val ]); }

    public function get_socketinlist($val) { return $this->list_socket[$val]; }
    public function get_adresse() { return $this->_adresse; }
    public function get_port() { return $this->_port; }
    public function get_socket() { return $this->socket; }
}

?>

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