Ds\Queue::allocate

(PECL ds >= 1.0.0)

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

説明

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

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

注意:

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

パラメータ

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.

返り値

値を返しません。

例

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)