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package Tak::Loop; |
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use IO::Select; |
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use Moo; |
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has is_running => (is => 'rw', clearer => 'loop_stop'); |
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has _read_watches => (is => 'ro', default => sub { {} }); |
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has _read_select => (is => 'ro', default => sub { IO::Select->new }); |
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sub pass_watches_to { |
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my ($self, $new_loop) = @_; |
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foreach my $fh ($self->_read_select->handles) { |
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$new_loop->watch_io( |
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handle => $fh, |
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on_read_ready => $self->_read_watches->{$fh} |
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); |
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} |
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} |
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sub watch_io { |
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my ($self, %watch) = @_; |
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my $fh = $watch{handle}; |
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if (my $cb = $watch{on_read_ready}) { |
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$self->_read_select->add($fh); |
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$self->_read_watches->{$fh} = $cb; |
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} |
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} |
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sub unwatch_io { |
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my ($self, %watch) = @_; |
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my $fh = $watch{handle}; |
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if ($watch{on_read_ready}) { |
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$self->_read_select->remove($fh); |
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delete $self->_read_watches->{$fh}; |
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} |
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} |
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sub loop_once { |
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my ($self) = @_; |
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my $read = $self->_read_watches; |
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my ($readable) = IO::Select->select($self->_read_select, undef, undef, 0.5); |
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# I would love to trap errors in the select call but IO::Select doesn't |
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# differentiate between an error and a timeout. |
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# -- no, love, mst. |
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foreach my $fh (@$readable) { |
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$read->{$fh}(); |
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} |
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} |
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sub loop_forever { |
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my ($self) = @_; |
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$self->is_running(1); |
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while ($self->is_running) { |
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$self->loop_once; |
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} |
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} |
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1; |