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80 lines (69 loc) · 1.87 KB
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<?php
declare(strict_types=1);
/**
* This file is part of Hyperf.
*
* @link https://www.hyperf.io
* @document https://hyperf.wiki
* @contact [email protected]
* @license https://github.com/hyperf/hyperf/blob/master/LICENSE
*/
namespace Hyperf\Coroutine;
use BadMethodCallException;
use Hyperf\Engine\Channel;
use InvalidArgumentException;
/**
* This file mostly code come from `swoole/library`.
*/
class WaitGroup
{
protected Channel $chan;
protected int $count = 0;
protected bool $waiting = false;
public function __construct(int $delta = 0)
{
$this->chan = new Channel(1);
if ($delta > 0) {
$this->add($delta);
}
}
public function add(int $delta = 1): void
{
if ($this->waiting) {
throw new BadMethodCallException('WaitGroup misuse: add called concurrently with wait');
}
$count = $this->count + $delta;
if ($count < 0) {
throw new InvalidArgumentException('WaitGroup misuse: negative counter');
}
$this->count = $count;
}
public function done(): void
{
$count = $this->count - 1;
if ($count < 0) {
throw new BadMethodCallException('WaitGroup misuse: negative counter');
}
$this->count = $count;
if ($count === 0 && $this->waiting) {
$this->chan->push(true);
}
}
public function wait(float $timeout = -1): bool
{
if ($this->waiting) {
throw new BadMethodCallException('WaitGroup misuse: reused before previous wait has returned');
}
if ($this->count > 0) {
$this->waiting = true;
$done = $this->chan->pop($timeout);
$this->waiting = false;
return $done;
}
return true;
}
public function count(): int
{
return $this->count;
}
}