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<?php
namespace Amp\Parallel\Worker;
/**
* Task implementation dispatching a simple callable.
*/
final class CallableTask implements Task
{
/** @var callable */
private $callable;
/** @var mixed[] */
private $args;
/**
* @param callable $callable Callable will be serialized.
* @param mixed $args Arguments to pass to the function. Must be serializable.
*/
public function __construct(callable $callable, array $args)
{
$this->callable = $callable;
$this->args = $args;
}
public function run(Environment $environment)
{
if ($this->callable instanceof \__PHP_Incomplete_Class) {
throw new \Error('When using a class instance as a callable, the class must be autoloadable');
}
if (\is_array($this->callable) && ($this->callable[0] ?? null) instanceof \__PHP_Incomplete_Class) {
throw new \Error('When using a class instance method as a callable, the class must be autoloadable');
}
if (!\is_callable($this->callable)) {
$message = 'User-defined functions must be autoloadable (that is, defined in a file autoloaded by composer)';
if (\is_string($this->callable)) {
$message .= \sprintf("; unable to load function '%s'", $this->callable);
}
throw new \Error($message);
}
return ($this->callable)(...$this->args);
}
}