| 1: | <?php declare(strict_types = 1); |
| 2: | |
| 3: | namespace ApiGen\Scheduler; |
| 4: | |
| 5: | use ApiGen\Task\Task; |
| 6: | use ApiGen\Task\TaskHandler; |
| 7: | |
| 8: | use function fclose; |
| 9: | use function pcntl_fork; |
| 10: | use function pcntl_waitpid; |
| 11: | use function pcntl_wexitstatus; |
| 12: | use function pcntl_wifexited; |
| 13: | use function pcntl_wifsignaled; |
| 14: | use function pcntl_wtermsig; |
| 15: | use function stream_socket_pair; |
| 16: | |
| 17: | use const STREAM_IPPROTO_IP; |
| 18: | use const STREAM_PF_UNIX; |
| 19: | use const STREAM_SOCK_STREAM; |
| 20: | |
| 21: | |
| 22: | |
| 23: | |
| 24: | |
| 25: | |
| 26: | |
| 27: | class ForkScheduler extends WorkerScheduler |
| 28: | { |
| 29: | |
| 30: | protected array $workers = []; |
| 31: | |
| 32: | |
| 33: | |
| 34: | |
| 35: | |
| 36: | public function __construct( |
| 37: | protected TaskHandler $handler, |
| 38: | int $workerCount, |
| 39: | ) { |
| 40: | parent::__construct($workerCount); |
| 41: | } |
| 42: | |
| 43: | |
| 44: | protected function start(): void |
| 45: | { |
| 46: | for ($workerId = 0; $workerId < $this->workerCount; $workerId++) { |
| 47: | $pair = stream_socket_pair(STREAM_PF_UNIX, STREAM_SOCK_STREAM, STREAM_IPPROTO_IP); |
| 48: | |
| 49: | if ($pair === false) { |
| 50: | throw new \RuntimeException('Failed to create socket pair, try running ApiGen with --workers 1'); |
| 51: | } |
| 52: | |
| 53: | $pid = pcntl_fork(); |
| 54: | |
| 55: | if ($pid < 0) { |
| 56: | throw new \RuntimeException('Failed to fork process, try running ApiGen with --workers 1'); |
| 57: | |
| 58: | } elseif ($pid === 0) { |
| 59: | fclose($pair[0]); |
| 60: | self::workerLoop($this->handler, $pair[1], $pair[1]); |
| 61: | exit(0); |
| 62: | |
| 63: | } else { |
| 64: | fclose($pair[1]); |
| 65: | $this->workers[$workerId] = $pid; |
| 66: | $this->workerReadableStreams[$workerId] = $pair[0]; |
| 67: | $this->workerWritableStreams[$workerId] = $pair[0]; |
| 68: | } |
| 69: | } |
| 70: | } |
| 71: | |
| 72: | |
| 73: | protected function stop(): void |
| 74: | { |
| 75: | foreach ($this->workerWritableStreams as $stream) { |
| 76: | fclose($stream); |
| 77: | } |
| 78: | |
| 79: | foreach ($this->workers as $pid) { |
| 80: | pcntl_waitpid($pid, $status); |
| 81: | |
| 82: | if (pcntl_wifexited($status)) { |
| 83: | if (($exitCode = pcntl_wexitstatus($status)) !== 0) { |
| 84: | throw new \RuntimeException("Worker with PID $pid exited with code $exitCode, try running ApiGen with --workers 1"); |
| 85: | } |
| 86: | |
| 87: | } elseif (pcntl_wifsignaled($status)) { |
| 88: | $signal = pcntl_wtermsig($status); |
| 89: | throw new \RuntimeException("Worker with PID $pid was killed by signal $signal, try running ApiGen with --workers 1"); |
| 90: | |
| 91: | } else { |
| 92: | throw new \LogicException('Invalid worker state'); |
| 93: | } |
| 94: | } |
| 95: | } |
| 96: | } |
| 97: | |