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package Mojo::Reactor::EV;
use Mojo::Base 'Mojo::Reactor::Poll';
use EV 4.0;
use Scalar::Util 'weaken';
my $EV;
sub CLONE { die "EV does not work with ithreads.\n" }
sub DESTROY { undef $EV }
# We have to fall back to Mojo::Reactor::Poll, since EV is unique
sub new { $EV++ ? Mojo::Reactor::Poll->new : shift->SUPER::new }
sub is_running { !!EV::depth }
sub one_tick { EV::run(EV::RUN_ONCE) }
sub recurring { shift->_timer(1, @_) }
sub start {EV::run}
sub stop { EV::break(EV::BREAK_ALL) }
sub timer { shift->_timer(0, @_) }
sub watch {
my ($self, $handle, $read, $write) = @_;
my $fd = fileno $handle;
my $io = $self->{io}{$fd};
my $mode;
if ($read && $write) { $mode = EV::READ | EV::WRITE }
elsif ($read) { $mode = EV::READ }
elsif ($write) { $mode = EV::WRITE }
else { delete $io->{watcher} }
if (my $w = $io->{watcher}) { $w->set($fd, $mode) }
elsif ($mode) {
weaken $self;
$io->{watcher} = EV::io($fd, $mode, sub { $self->_io($fd, @_) });
}
return $self;
}
sub _io {
my ($self, $fd, $w, $revents) = @_;
my $io = $self->{io}{$fd};
$self->_sandbox('Read', $io->{cb}, 0) if EV::READ &$revents;
$self->_sandbox('Write', $io->{cb}, 1)
if EV::WRITE &$revents && $self->{io}{$fd};
}
sub _timer {
my ($self, $recurring, $after, $cb) = @_;
$after ||= '0.0001';
my $id = $self->SUPER::_timer(0, 0, $cb);
weaken $self;
$self->{timers}{$id}{watcher} = EV::timer(
$after => ($recurring ? $after : 0) => sub {
$self->_sandbox("Timer $id", $self->{timers}{$id}{cb});
delete $self->{timers}{$id} unless $recurring;
}
);
return $id;
}
1;
=head1 NAME
Mojo::Reactor::EV - Low level event reactor with libev support
=head1 SYNOPSIS
use Mojo::Reactor::EV;
# Watch if handle becomes readable or writable
my $reactor = Mojo::Reactor::EV->new;
$reactor->io($handle => sub {
my ($reactor, $writable) = @_;
say $writable ? 'Handle is writable' : 'Handle is readable';
});
# Change to watching only if handle becomes writable
$reactor->watch($handle, 0, 1);
# Add a timer
$reactor->timer(15 => sub {
my $reactor = shift;
$reactor->remove($handle);
say 'Timeout!';
});
# Start reactor if necessary
$reactor->start unless $reactor->is_running;
=head1 DESCRIPTION
L<Mojo::Reactor::EV> is a low level event reactor based on L<EV> (4.0+).
=head1 EVENTS
L<Mojo::Reactor::EV> inherits all events from L<Mojo::Reactor::Poll>.
=head1 METHODS
L<Mojo::Reactor::EV> inherits all methods from L<Mojo::Reactor::Poll> and
implements the following new ones.
=head2 new
my $reactor = Mojo::Reactor::EV->new;
Construct a new L<Mojo::Reactor::EV> object.
=head2 is_running
my $success = $reactor->is_running;
Check if reactor is running.
=head2 one_tick
$reactor->one_tick;
Run reactor until an event occurs or no events are being watched anymore. Note
that this method can recurse back into the reactor, so you need to be careful.
=head2 recurring
my $id = $reactor->recurring(0.25 => sub {...});
Create a new recurring timer, invoking the callback repeatedly after a given
amount of time in seconds.
=head2 start
$reactor->start;
Start watching for I/O and timer events, this will block until C<stop> is
called or no events are being watched anymore.
=head2 stop
$reactor->stop;
Stop watching for I/O and timer events.
=head2 timer
my $id = $reactor->timer(0.5 => sub {...});
Create a new timer, invoking the callback after a given amount of time in
seconds.
=head2 watch
$reactor = $reactor->watch($handle, $readable, $writable);
Change I/O events to watch handle for with true and false values. Note that
this method requires an active I/O watcher.
=head1 SEE ALSO
L<Mojolicious>, L<Mojolicious::Guides>, L<http://mojolicio.us>.
=cut
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