include 'vendor/autoload.php';

use Async\Spawn\Spawn;

// Shows output by default and Channel instance is extracted from args.
$future = \parallel($function, ...$args)
// Shows output by default, turns on yield usage, can include additional file, and the Channel instance is extracted from args.
$future = \paralleling($function, $includeFile, ...$args)
// Or Does not show output by default and channel instance has to be explicitly passed in.
$future = \spawn($function, $timeout, $channel)
// Or Show output by default and channel instance has to be explicitly passed in.
$future = \spawning($function, $timeout, $channel)
// Or
$future = Spawn::create(function () use ($thing) {
    // Do a thing
    }, $timeout, $channel)
    ->then(function ($output) {
        // Handle success
    })->catch(function (\Throwable $exception) {
        // Handle exception
});

// Wait for `Future` to terminate. Note this should only be executed for local testing only.
// Use "How to integrate into your project/package" section instead.
// Second option can be used to set to display child output, default is false
\spawn_run($future, true);
// Or same as
$future->displayOn()->run();
// Or
$future->run();

include 'vendor/autoload.php';

use Async\Spawn\Channeled as Channel;

$channel = Channel::make("io");

// Shows output by default and Channel instance is extracted for args.
$future = parallel(function ($channel) {
  $channel = Channel::open($channel);

  for ($count = 0; $count <= 10; $count++) {
    $channel->send($count);
  }

  echo 'pingpangpong';
  $channel->send(false);

  return 'return whatever';
}, (string) $channel);

while (($value = $channel->recv()) !== false) {
  var_dump($value);
}

echo \spawn_output($future); // pingpangpong
// Or
echo \spawn_result($future); // return whatever
// Or
echo $future->getResult(); // return whatever

// Shows output by default and Channel instance is extracted for args.
$future = parallel($function, ...$args)
// Or
$future = spawn($function, $timeout, $channel)
// Or
$future = Spawn::create(function () {
        // The second argument is optional, Defaults no timeout,
        // it sets The maximum amount of time a process may take to finish in seconds
        // The third is the Channel instance pass to Future subprocess.

        return `whatever`|Object|Closure|; // `whatever` will be encoded, then decoded by parent.
    }, int $timeout = 0 , $input = null)
    ->then(function ($result) {
        // On success, `$result` is returned by the process.
    })
    ->catch(function ($exception) {
        // When an exception is thrown from within a process, it's caught and passed here.
    })
    ->timeout(function () {
        // When an timeout is reached, it's caught and passed here.
    })
    ->progress(function ($type, $data) {
        // Live progressing of output: `$type, $data` is returned by the Future process.
        // $type is `ERR` for stderr, or `OUT` for stdout.
    })
    ->signal($signal, function ($signal) {
        // The process will be sent termination `signal` and stopped.
        // When an signal is triggered, it's caught and passed here.
        // This feature is only available using `libuv`.
    });

->then(function ($result) {
    // On success, `$result` is returned by the Future process or callable you passed.
        //
    }, function ($catchException) {
        //
    }, function ($progressOutput) {
        //
    }
);

// To turn on displaying of child output.
->displayOn();

// Stop displaying child output.
->displayOff();

// A `Future` process can be retried.
->restart();

// Wait for `Future` to terminate. Note this should only be executed for local testing only.
// Use "How to integrate into your project/package" section instead.
->run();

include 'vendor/autoload.php';

use Async\Spawn\Parallel;

$parallel = new Parallel();

foreach ($things as $thing) {
        // the second argument `optional`, can set the maximum amount of time a process may take to finish in seconds.
    $parallel->add(function () use ($thing) {
        // Do a thing
    }, $optional)->then(function ($output) {
        // Handle success
        // On success, `$output` is returned by the process or callable you passed to the queue.
    })->catch(function (\Throwable $exception) {
        // Handle exception
        // When an exception is thrown from within a process, it's caught and passed here.
    });
}

// Wait for Parallel `Future` Pool to terminate. Note this should only be executed for local testing only.
// Use "How to integrate into your project/package" section instead.
$parallel->wait();

use Async\Spawn\Parallel;

$parallel = (new Parallel())

// The maximum amount of processes which can run simultaneously.
    ->concurrency(20)

// Configure how long the loop should sleep before re-checking the process statuses in milliseconds.
    ->sleepTime(50000);

use Async\Spawn\Parallel;
use Async\Spawn\FutureHandler;
use Async\Spawn\FutureInterface;
use Async\Spawn\ParallelInterface;

class setupLoop
{
  /**
   * @var Parallel
   */
  protected $parallel;

  /**
   * @var FutureHandler
   */
  protected $future = null;

  public function __construct() {
    $this->parallel = new Parallel($this);
    $this->future = $this->parallel->getFutureHandler();
  }

  public function addFuture($callable, int $timeout = 0, bool $display = false, $channel = null): FutureInterface {
    $future = $this->parallel->add($callable, $timeout, $channel);
    return $display ? $future->displayOn() : $future;
  }

  public function getParallel(): ParallelInterface {
    return $this->parallel;
  }

  /**
   * Check for pending I/O events, signals, futures, streams/sockets/fd activity, timers or etc...
   */
  protected function hasEvents(): bool {
    return !$this->future->isEmpty() || !$this->ActionEventsCheckers->isEmpty();
  }

  public function runLoop() {
    while ($this->hasEvents()) {
      $this->future->processing();
      if ($this->waitForAction());
        $this->DoEventActions();
    }
  }

  public function executeTask($event, $parameters = null) {
    $this->DoEventActions($event, $parameters);
    // Or just
    // if (\is_callable($event))
       // $event($parameters);
  }

  public function isPcntl(): bool {}
}

// functions.php
if (!\function_exists('___marker')) {
  //
  // All additional extra functions needed in a `Future` process...
  //

  function ___marker()
  {
    return true;
  }
}