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Direktori : /home2/selectio/www/fms-worksuite/vendor/amphp/amp/lib/Loop/ |
Current File : /home2/selectio/www/fms-worksuite/vendor/amphp/amp/lib/Loop/NativeDriver.php |
<?php namespace Amp\Loop; use Amp\CallableMaker; use Amp\Coroutine; use Amp\Promise; use React\Promise\PromiseInterface as ReactPromise; use function Amp\Internal\getCurrentTime; use function Amp\Promise\rethrow; class NativeDriver extends Driver { use CallableMaker; /** @var resource[] */ private $readStreams = []; /** @var Watcher[][] */ private $readWatchers = []; /** @var resource[] */ private $writeStreams = []; /** @var Watcher[][] */ private $writeWatchers = []; /** @var Internal\TimerQueue */ private $timerQueue; /** @var Watcher[][] */ private $signalWatchers = []; /** @var int Internal timestamp for now. */ private $now; /** @var int Loop time offset */ private $nowOffset; /** @var bool */ private $signalHandling; /** @var callable */ private $streamSelectErrorHandler; /** @var bool */ private $streamSelectIgnoreResult = false; public function __construct() { $this->timerQueue = new Internal\TimerQueue; $this->signalHandling = \extension_loaded("pcntl"); $this->nowOffset = getCurrentTime(); $this->now = \random_int(0, $this->nowOffset); $this->nowOffset -= $this->now; $this->streamSelectErrorHandler = function ($errno, $message) { // Casing changed in PHP 8 from 'unable' to 'Unable' if (\stripos($message, "stream_select(): unable to select [4]: ") === 0) { // EINTR $this->streamSelectIgnoreResult = true; return; } if (\strpos($message, 'FD_SETSIZE') !== false) { $message = \str_replace(["\r\n", "\n", "\r"], " ", $message); $pattern = '(stream_select\(\): You MUST recompile PHP with a larger value of FD_SETSIZE. It is set to (\d+), but you have descriptors numbered at least as high as (\d+)\.)'; if (\preg_match($pattern, $message, $match)) { $helpLink = 'https://amphp.org/amp/event-loop/#implementations'; $message = 'You have reached the limits of stream_select(). It has a FD_SETSIZE of ' . $match[1] . ', but you have file descriptors numbered at least as high as ' . $match[2] . '. ' . "You can install one of the extensions listed on {$helpLink} to support a higher number of " . "concurrent file descriptors. If a large number of open file descriptors is unexpected, you " . "might be leaking file descriptors that aren't closed correctly."; } } throw new \Exception($message, $errno); }; } /** * {@inheritdoc} * * @throws \Amp\Loop\UnsupportedFeatureException If the pcntl extension is not available. */ public function onSignal(int $signo, callable $callback, $data = null): string { if (!$this->signalHandling) { throw new UnsupportedFeatureException("Signal handling requires the pcntl extension"); } return parent::onSignal($signo, $callback, $data); } /** * {@inheritdoc} */ public function now(): int { $this->now = getCurrentTime() - $this->nowOffset; return $this->now; } /** * {@inheritdoc} */ public function getHandle() { return null; } /** * @param bool $blocking * * @return void * * @throws \Throwable */ protected function dispatch(bool $blocking) { $this->selectStreams( $this->readStreams, $this->writeStreams, $blocking ? $this->getTimeout() : 0 ); $now = $this->now(); while ($watcher = $this->timerQueue->extract($now)) { if ($watcher->type & Watcher::REPEAT) { $watcher->enabled = false; // Trick base class into adding to enable queue when calling enable() $this->enable($watcher->id); } else { $this->cancel($watcher->id); } try { // Execute the timer. $result = ($watcher->callback)($watcher->id, $watcher->data); if ($result === null) { continue; } if ($result instanceof \Generator) { $result = new Coroutine($result); } if ($result instanceof Promise || $result instanceof ReactPromise) { rethrow($result); } } catch (\Throwable $exception) { $this->error($exception); } } if ($this->signalHandling) { \pcntl_signal_dispatch(); } } /** * {@inheritdoc} * * @return void */ protected function activate(array $watchers) { foreach ($watchers as $watcher) { switch ($watcher->type) { case Watcher::READABLE: \assert(\is_resource($watcher->value)); $streamId = (int) $watcher->value; $this->readWatchers[$streamId][$watcher->id] = $watcher; $this->readStreams[$streamId] = $watcher->value; break; case Watcher::WRITABLE: \assert(\is_resource($watcher->value)); $streamId = (int) $watcher->value; $this->writeWatchers[$streamId][$watcher->id] = $watcher; $this->writeStreams[$streamId] = $watcher->value; break; case Watcher::DELAY: case Watcher::REPEAT: \assert(\is_int($watcher->value)); $this->timerQueue->insert($watcher); break; case Watcher::SIGNAL: \assert(\is_int($watcher->value)); if (!isset($this->signalWatchers[$watcher->value])) { if (!@\pcntl_signal($watcher->value, $this->callableFromInstanceMethod('handleSignal'))) { $message = "Failed to register signal handler"; if ($error = \error_get_last()) { $message .= \sprintf("; Errno: %d; %s", $error["type"], $error["message"]); } throw new \Error($message); } } $this->signalWatchers[$watcher->value][$watcher->id] = $watcher; break; default: // @codeCoverageIgnoreStart throw new \Error("Unknown watcher type"); // @codeCoverageIgnoreEnd } } } /** * {@inheritdoc} * * @return void */ protected function deactivate(Watcher $watcher) { switch ($watcher->type) { case Watcher::READABLE: $streamId = (int) $watcher->value; unset($this->readWatchers[$streamId][$watcher->id]); if (empty($this->readWatchers[$streamId])) { unset($this->readWatchers[$streamId], $this->readStreams[$streamId]); } break; case Watcher::WRITABLE: $streamId = (int) $watcher->value; unset($this->writeWatchers[$streamId][$watcher->id]); if (empty($this->writeWatchers[$streamId])) { unset($this->writeWatchers[$streamId], $this->writeStreams[$streamId]); } break; case Watcher::DELAY: case Watcher::REPEAT: $this->timerQueue->remove($watcher); break; case Watcher::SIGNAL: \assert(\is_int($watcher->value)); if (isset($this->signalWatchers[$watcher->value])) { unset($this->signalWatchers[$watcher->value][$watcher->id]); if (empty($this->signalWatchers[$watcher->value])) { unset($this->signalWatchers[$watcher->value]); @\pcntl_signal($watcher->value, \SIG_DFL); } } break; default: // @codeCoverageIgnoreStart throw new \Error("Unknown watcher type"); // @codeCoverageIgnoreEnd } } /** * @param resource[] $read * @param resource[] $write * @param int $timeout * * @return void */ private function selectStreams(array $read, array $write, int $timeout) { $timeout /= self::MILLISEC_PER_SEC; if (!empty($read) || !empty($write)) { // Use stream_select() if there are any streams in the loop. if ($timeout >= 0) { $seconds = (int) $timeout; $microseconds = (int) (($timeout - $seconds) * self::MICROSEC_PER_SEC); } else { $seconds = null; $microseconds = null; } // Failed connection attempts are indicated via except on Windows // @link https://github.com/reactphp/event-loop/blob/8bd064ce23c26c4decf186c2a5a818c9a8209eb0/src/StreamSelectLoop.php#L279-L287 // @link https://docs.microsoft.com/de-de/windows/win32/api/winsock2/nf-winsock2-select $except = null; if (\DIRECTORY_SEPARATOR === '\\') { $except = $write; } \set_error_handler($this->streamSelectErrorHandler); try { $result = \stream_select($read, $write, $except, $seconds, $microseconds); } finally { \restore_error_handler(); } if ($this->streamSelectIgnoreResult || $result === 0) { $this->streamSelectIgnoreResult = false; return; } if (!$result) { $this->error(new \Exception('Unknown error during stream_select')); return; } foreach ($read as $stream) { $streamId = (int) $stream; if (!isset($this->readWatchers[$streamId])) { continue; // All read watchers disabled. } foreach ($this->readWatchers[$streamId] as $watcher) { if (!isset($this->readWatchers[$streamId][$watcher->id])) { continue; // Watcher disabled by another IO watcher. } try { $result = ($watcher->callback)($watcher->id, $stream, $watcher->data); if ($result === null) { continue; } if ($result instanceof \Generator) { $result = new Coroutine($result); } if ($result instanceof Promise || $result instanceof ReactPromise) { rethrow($result); } } catch (\Throwable $exception) { $this->error($exception); } } } \assert(\is_array($write)); // See https://github.com/vimeo/psalm/issues/3036 if ($except) { foreach ($except as $key => $socket) { $write[$key] = $socket; } } foreach ($write as $stream) { $streamId = (int) $stream; if (!isset($this->writeWatchers[$streamId])) { continue; // All write watchers disabled. } foreach ($this->writeWatchers[$streamId] as $watcher) { if (!isset($this->writeWatchers[$streamId][$watcher->id])) { continue; // Watcher disabled by another IO watcher. } try { $result = ($watcher->callback)($watcher->id, $stream, $watcher->data); if ($result === null) { continue; } if ($result instanceof \Generator) { $result = new Coroutine($result); } if ($result instanceof Promise || $result instanceof ReactPromise) { rethrow($result); } } catch (\Throwable $exception) { $this->error($exception); } } } return; } if ($timeout < 0) { // Only signal watchers are enabled, so sleep indefinitely. \usleep(\PHP_INT_MAX); return; } if ($timeout > 0) { // Sleep until next timer expires. \usleep((int) ($timeout * self::MICROSEC_PER_SEC)); } } /** * @return int Milliseconds until next timer expires or -1 if there are no pending times. */ private function getTimeout(): int { $expiration = $this->timerQueue->peek(); if ($expiration === null) { return -1; } $expiration -= getCurrentTime() - $this->nowOffset; return $expiration > 0 ? $expiration : 0; } /** * @param int $signo * * @return void */ private function handleSignal(int $signo) { foreach ($this->signalWatchers[$signo] as $watcher) { if (!isset($this->signalWatchers[$signo][$watcher->id])) { continue; } try { $result = ($watcher->callback)($watcher->id, $signo, $watcher->data); if ($result === null) { continue; } if ($result instanceof \Generator) { $result = new Coroutine($result); } if ($result instanceof Promise || $result instanceof ReactPromise) { rethrow($result); } } catch (\Throwable $exception) { $this->error($exception); } } } }