Ds\Queue::allocate

(PECL ds >= 1.0.0)

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

说明

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

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

Note:

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

参数

capacity

The number of values for which capacity should be allocated.

Note:

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

Note:

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

返回值

没有返回值。

范例

Example #1 Ds\Queue::allocate() example

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

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

以上例程的输出类似于：

int(8)
int(128)