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<?php declare(strict_types=1);
/*
 * This file is part of phpunit/php-invoker.
 *
 * (c) Sebastian Bergmann <sebastian@phpunit.de>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace SebastianBergmann\Invoker;

use function extension_loaded;
use function function_exists;
use function implode;
use RuntimeException;

final class ProcessControlExtensionNotLoadedException extends RuntimeException implements Exception
{
    public function __construct()
    {
        $message = [];

if (!extension_loaded('pcntl')) {
            $message[] = 'The pcntl (process control) extension for PHP must be loaded.';
        }

if (!function_exists('pcntl_signal')) {
            $message[] = 'The pcntl_signal() function must not be disabled.';
        }

if (!function_exists('pcntl_async_signals')) {
            $message[] = 'The pcntl_async_signals() function must not be disabled.';
        }

if (!function_exists('pcntl_alarm')) {
            $message[] = 'The pcntl_alarm() function must not be disabled.';
        }

parent::__construct(implode(PHP_EOL, $message));
    }
}