PHP Conference Nagoya 2025

    La classe Volatile

    (PECL pthreads >= 3.0.0)

    Introduction

    La classe Volatile est nouvelle dans pthreads v3. Son introduction est une conséquence des nouvelles sémantiques d'immutabilité des membres Threaded des classes Threaded. La classe Volatile permet la mutabilité de ses membres Threaded, et est également utilisée pour stocker des tableaux PHP dans des contextes Threaded.

    Synopsis de la classe

    class Volatile extends Threaded implements Collectable, Traversable {
    /* Méthodes héritées */
    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(): bool
    public Threaded::synchronized(Closure $block, mixed ...$args): mixed
    public Threaded::wait(int $timeout = ?): bool
    }

    Exemples

    Exemple #1 Nouvelles sémantiques d'immutabilité de Threaded

    <?php

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

    // essaie de remplacer une propriété Threaded d'une classe Threaded (invalide)
    $this->data = new stdClass();
    }
    }

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

    Résultat de l'exemple ci-dessus est similaire à :

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

    Exemple #2 Cas d'utilisation de Volatile

    <?php

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

    // essaie de remplacer une propriété Threaded d'une classe Volatile (valide)
    $this->data = new stdClass();
    }
    }

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

    Résultat de l'exemple ci-dessus est similaire à :

    object(stdClass)#3 (0) {
}

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    User Contributed Notes 1 note

    up
    1
    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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