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io::async::detachedcode

IO::Async::DetachedCode(3pm)				User Contributed Perl Documentation			      IO::Async::DetachedCode(3pm)

NAME

       "IO::Async::DetachedCode" - execute code asynchronously in child processes

SYNOPSIS

       This object is used indirectly via the "IO::Async::Loop"'s "detach_code" method.

	use IO::Async::Loop;
	my $loop = IO::Async::Loop->new;

	my $code = $loop->detach_code(
	   code => sub {
	      my ( $number ) = @_;
	      return is_prime( $number );
	   }
	);

	$code->call(
	   args => [ 123454321 ],
	   on_return => sub {
	      my $isprime = shift;
	      print "123454321 " . ( $isprime ? "is" : "is not" ) . " a prime number
";
	   },
	   on_error => sub {
	      print STDERR "Cannot determine if it's prime - $_[0]
";
	   },
	);

	$loop->run;

DESCRIPTION

       This object class provides a legacy compatibility layer for existing code that tries to construct such an object. It should not be used for
       new code; see instead the IO::Async::Function object, for which this is now a wrapper.

CONSTRUCTOR

   $code = $loop->detach_code( %params )
       This function returns a new instance of a "IO::Async::DetachedCode" object.  The %params hash takes the following keys:

       code => CODE
	       A block of code to call in the child process.

       stream
       marshaller
	       These arguments are no longer used; any values passed will be ignored.

       workers => INT
	       Optional integer, specifies the number of parallel workers to create.

	       If not supplied, 1 is used.

       exit_on_die => BOOL
       setup => ARRAY
	       Passed through to the underlying "IO::Async::Function" object.

METHODS

   $code->call( %params )
       Calls one invocation of the contained function code block. See the "call" method on "IO::Async::Function" for more detail.

   $code->shutdown
       This method requests that the detached worker processes stop running.

   $n_workers = $code->workers
       This method in scalar context returns the number of workers currently running.

   @worker_pids = $code->workers
       This method in list context returns a list of the PID numbers of all the currently running worker processes.

AUTHOR

       Paul Evans <leonerd@leonerd.org.uk>

perl v5.14.2							    2012-10-24					      IO::Async::DetachedCode(3pm)