Ds\Queue::allocate

(PECL ds >= 1.0.0)

Ds\Queue::allocate — Allocates enough memory for a required capacity

public function Ds\Queue::allocate(int $capacity): void

Ensures that enough memory is allocated for a required capacity. This removes the need to reallocate the internal buffer as values are added.

注意:
Capacity will always be rounded up to the nearest power of 2.

capacity: The number of values for which capacity should be allocated.

注意:
Capacity will stay the same if this value is less than or equal to the current capacity.

注意:
Capacity will always be rounded up to the nearest power of 2.

値を返しません。

例1 Ds\Queue::allocate() example

<?php
$queue = new \Ds\Queue();
var_dump($queue->capacity());

$queue->allocate(100);
var_dump($queue->capacity());
?>

上の例の出力は、たとえば以下のようになります。

int(8)
int(128)

関連キーワード: