Unstacking work

# Worker::unstack

(PECL pthreads >= 2.0.0)

Worker::unstack — Unstacking work

### Description

public Worker::unstack(): int

Removes the first task (the oldest one) in the stack.

### Parameters

This function has no parameters.

### Return Values

The new size of the stack.

### Changelog

Version | Description
--- | ---
PECL pthreads 3.0.0 | The parameter to specify the task to unstack has been removed. Now, only the first task in the stack is removed.

### Examples

Example #1 Removing objects from the stack of Workers

`<?php
$my = new Worker();
$work = new class extends Threaded {};
var_dump($my->stack($work));
var_dump($my->unstack());`

The above example will output:

    int(1)
    int(0)

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