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\n";
   },
   on_error => sub {
      print STDERR "Cannot determine if it's prime - $_[0]\n";
   },
);

$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>