Just a note that AtomicInteger should not expose Lock, as this is an implementation detail of atomicity.
https://www.internalpointers.com/post/lock-free-multithreading-atomic-operations
While not all architectures have lock-free primitive support, the fact some do, mean that this exposure is a second interface atop Atomicity of an Integer
final class AtomicLockingInteger extends AtomicInteger implements Lockable {
/** ... */
}
pht\AtomicInteger::lock
(PECL pht >= 0.0.1)
pht\AtomicInteger::lock — Acquires the atomic integer's mutex lock
Description
public pht\AtomicInteger::lock
(
) : void
This method will acquire the mutex lock associated with the atomic integer. The mutex lock only needs to be acquired when needing to group together multiple operations.
The mutex locks of the atomic values are reentrant safe. It is therefore valid for the same thread to reacquire a mutex lock that it has already acquired.
Liste de paramètres
Cette fonction ne contient aucun paramètre.
Valeurs de retour
No return value.
Exemples
Exemple #1 Grouping together an atomic integer's operations (requiring a mutex lock)
<?php
use pht\AtomicInteger;
$atomicInteger = new AtomicInteger(2);
// assumes $atomicInteger is being used by multiple threads
$atomicInteger->lock();
$atomicInteger->set($atomicInteger->get() * 2); // double the value
$atomicInteger->unlock();
var_dump($atomicInteger->get());
L'exemple ci-dessus va afficher :
int(4)
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User Contributed Notes 1 note
Anonymous ¶
2 years ago
