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<?php |
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/** |
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* Work |
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* |
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* Cooperative multitasking via coroutines. |
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* |
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* @package core |
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* @author [email protected] |
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* @reference http://nikic.github.io/2012/12/22/Cooperative-multitasking-using-coroutines-in-PHP.html |
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* @copyright Caffeina srl - 2015 - http://caffeina.com |
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*/ |
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class Work { |
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use Module; |
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protected static $pool = null; |
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protected static $workers; |
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protected static $lastID = 0; |
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public static function add($id, $job=null){ |
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self::$pool or ( self::$pool = new \SplQueue() ); |
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if(is_callable($id) && $job===null){ |
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$job = $id; |
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$id = ++self::$lastID; |
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} |
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$task = new TaskCoroutine($id, $job instanceof \Generator ? $job : $job()); |
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self::$workers[$id] = $task; |
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self::$pool->enqueue($task); |
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return $task; |
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} |
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public static function send($id,$passValue) { |
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isset(self::$workers[$id]) && self::$workers[$id]->pass($passValue); |
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} |
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public static function run(){ |
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self::$pool or ( self::$pool = new \SplQueue() ); |
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while (!self::$pool->isEmpty()) { |
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$task = self::$pool->dequeue(); |
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$task->run(); |
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if ($task->complete()) { |
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unset(self::$workers[$task->id()]); |
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} else { |
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self::$pool->enqueue($task); |
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} |
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} |
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} |
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/** |
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* Defer callback execution after script execution |
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* @param callable $callback The deferred callback |
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*/ |
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public static function after(callable $callback){ |
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static::$inited_shutdown || static::install_shutdown(); |
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Event::on('core.shutdown', $callback); |
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} |
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/** |
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* Single shot defer handeler install |
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*/ |
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protected static function install_shutdown(){ |
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if (static::$inited_shutdown) return; |
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// Disable time limit |
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set_time_limit(0); |
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// HHVM support |
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if(function_exists('register_postsend_function')){ |
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register_postsend_function(function(){ |
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Event::trigger('core.shutdown'); |
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}); |
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} else if(function_exists('fastcgi_finish_request')) { |
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register_shutdown_function(function(){ |
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fastcgi_finish_request(); |
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Event::trigger('core.shutdown'); |
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}); |
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} else { |
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register_shutdown_function(function(){ |
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Event::trigger('core.shutdown'); |
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}); |
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} |
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static::$inited_shutdown = true; |
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} |
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} |
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class TaskCoroutine { |
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protected $id; |
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protected $coroutine; |
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protected $passValue = null; |
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protected $beforeFirstYield = true; |
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protected static $inited_shutdown = false; |
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public function __construct($id, \Generator $coroutine) { |
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$this->id = $id; |
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$this->coroutine = $coroutine; |
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} |
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public function id() { |
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return $this->id; |
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} |
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public function pass($passValue) { |
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$this->passValue = $passValue; |
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} |
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public function run() { |
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if ($this->beforeFirstYield) { |
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$this->beforeFirstYield = false; |
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return $this->coroutine->current(); |
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} else { |
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$retval = $this->coroutine->send($this->passValue); |
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$this->passValue = null; |
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return $retval; |
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} |
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} |
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public function complete() { |
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return ! $this->coroutine->valid(); |
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} |
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} |
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caffeina-core /
core
