/usr/share/perl5/IO/Async/Future.pm is in libio-async-perl 0.64-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 | # You may distribute under the terms of either the GNU General Public License
# or the Artistic License (the same terms as Perl itself)
#
# (C) Paul Evans, 2013 -- leonerd@leonerd.org.uk
package IO::Async::Future;
use strict;
use warnings;
our $VERSION = '0.64';
use base qw( Future );
Future->VERSION( '0.05' ); # to respect subclassing
use Carp;
=head1 NAME
C<IO::Async::Future> - use L<Future> with L<IO::Async>
=head1 SYNOPSIS
use IO::Async::Loop;
my $loop = IO::Async::Loop->new;
my $future = $loop->new_future;
$loop->watch_time( after => 3, code => sub { $future->done( "Done" ) } );
print $future->get, "\n";
=head1 DESCRIPTION
This subclass of L<Future> stores a reference to the L<IO::Async::Loop>
instance that created it, allowing the C<await> method to block until the
Future is ready. These objects should not be constructed directly; instead
the C<new_future> method on the containing Loop should be used.
For a full description on how to use Futures, see the L<Future> documentation.
=cut
=head1 CONSTRUCTORS
New C<IO::Async::Future> objects should be constructed by using the following
methods on the C<Loop>. For more detail see the L<IO::Async::Loop>
documentation.
=head2 $future = $loop->new_future
Returns a new pending Future.
=head2 $future = $loop->delay_future( %args )
Returns a new Future that will become done at a given time.
=head2 $future = $loop->timeout_future( %args )
Returns a new Future that will become failed at a given time.
=cut
sub new
{
my $proto = shift;
my $self = $proto->SUPER::new;
if( ref $proto ) {
$self->{loop} = $proto->{loop};
}
else {
$self->{loop} = shift;
}
return $self;
}
=head1 METHODS
=cut
=head2 $loop = $future->loop
Returns the underlying C<IO::Async::Loop> object.
=cut
sub loop
{
my $self = shift;
return $self->{loop};
}
sub await
{
my $self = shift;
$self->{loop}->loop_once;
}
=head2 $future->done_later( @result )
A shortcut to calling the C<done> method in a C<later> idle watch on the
underlying Loop object. Ensures that a returned Future object is not ready
immediately, but will wait for the next IO round.
Like C<done>, returns C<$future> itself to allow easy chaining.
=cut
sub done_later
{
my $self = shift;
my @result = @_;
$self->loop->later( sub { $self->done( @result ) } );
return $self;
}
=head2 $future->fail_later( $exception, @details )
A shortcut to calling the C<fail> method in a C<later> idle watch on the
underlying Loop object. Ensures that a returned Future object is not ready
immediately, but will wait for the next IO round.
Like C<fail>, returns C<$future> itself to allow easy chaining.
=cut
sub fail_later
{
my $self = shift;
my ( $exception, @details ) = @_;
$exception or croak "Expected a true exception";
$self->loop->later( sub { $self->fail( $exception, @details ) } );
return $self;
}
=head1 AUTHOR
Paul Evans <leonerd@leonerd.org.uk>
=cut
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