pht\Queue::lock
(PECL pht >= 0.0.1)
pht\Queue::lock — Acquires the queue's mutex lock
Beschreibung
public pht\Queue::lock
(
) : void
This method will acquire the mutex lock associated with the queue. The mutex lock should always be acquired when manipulating the queue if it is being used by multiple threads.
The mutex locks of the Inter-Thread Communication (ITC) data structures are not reentrant. Attempting to reacquire an already-acquired mutex lock by the same thread will therefore cause a deadlock.
Parameter-Liste
Diese Funktion besitzt keine Parameter.
Rückgabewerte
No return value.
Beispiele
Beispiel #1 Locking a queue's mutex lock
<?php
use pht\{Thread, Queue};
$thread = new Thread();
$queue = new Queue();
$thread->addFunctionTask(function ($queue) {
$queue->lock();
$queue->push(1);
$queue->unlock();
}, $queue);
$thread->start();
// $queue is currently being used by multiple threads
$queue->lock();
$queue->push(1);
$queue->unlock();
$thread->join();
// $queue is only being used in this thread now, so no need to lock it
while ($queue->size()) {
var_dump($queue->pop());
}
Das oben gezeigte Beispiel erzeugt folgende Ausgabe:
int(1) int(1)
add a note
User Contributed Notes
There are no user contributed notes for this page.
