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.\" ========================================================================
.\"
.IX Title "Mojo::Reactor::EV 3pm"
.TH Mojo::Reactor::EV 3pm "2019-02-05" "perl v5.28.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.SH "NAME"
Mojo::Reactor::EV \- Low\-level event reactor with libev support
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&  use Mojo::Reactor::EV;
\&
\&  # Watch if handle becomes readable or writable
\&  my $reactor = Mojo::Reactor::EV\->new;
\&  $reactor\->io($first => sub {
\&    my ($reactor, $writable) = @_;
\&    say $writable ? \*(AqFirst handle is writable\*(Aq : \*(AqFirst handle is readable\*(Aq;
\&  });
\&
\&  # Change to watching only if handle becomes writable
\&  $reactor\->watch($first, 0, 1);
\&
\&  # Turn file descriptor into handle and watch if it becomes readable
\&  my $second = IO::Handle\->new_from_fd($fd, \*(Aqr\*(Aq);
\&  $reactor\->io($second => sub {
\&    my ($reactor, $writable) = @_;
\&    say $writable ? \*(AqSecond handle is writable\*(Aq : \*(AqSecond handle is readable\*(Aq;
\&  })\->watch($second, 1, 0);
\&
\&  # Add a timer
\&  $reactor\->timer(15 => sub {
\&    my $reactor = shift;
\&    $reactor\->remove($first);
\&    $reactor\->remove($second);
\&    say \*(AqTimeout!\*(Aq;
\&  });
\&
\&  # Start reactor if necessary
\&  $reactor\->start unless $reactor\->is_running;
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Mojo::Reactor::EV is a low-level event reactor based on \s-1EV\s0 (4.0+).
.SH "EVENTS"
.IX Header "EVENTS"
Mojo::Reactor::EV inherits all events from Mojo::Reactor::Poll.
.SH "METHODS"
.IX Header "METHODS"
Mojo::Reactor::EV inherits all methods from Mojo::Reactor::Poll and
implements the following new ones.
.SS "again"
.IX Subsection "again"
.Vb 1
\&  $reactor\->again($id);
.Ve
.PP
Restart timer. Note that this method requires an active timer.
.SS "is_running"
.IX Subsection "is_running"
.Vb 1
\&  my $bool = $reactor\->is_running;
.Ve
.PP
Check if reactor is running.
.SS "new"
.IX Subsection "new"
.Vb 1
\&  my $reactor = Mojo::Reactor::EV\->new;
.Ve
.PP
Construct a new Mojo::Reactor::EV object.
.SS "one_tick"
.IX Subsection "one_tick"
.Vb 1
\&  $reactor\->one_tick;
.Ve
.PP
Run reactor until an event occurs or no events are being watched anymore.
.PP
.Vb 4
\&  # Don\*(Aqt block longer than 0.5 seconds
\&  my $id = $reactor\->timer(0.5 => sub {});
\&  $reactor\->one_tick;
\&  $reactor\->remove($id);
.Ve
.SS "recurring"
.IX Subsection "recurring"
.Vb 1
\&  my $id = $reactor\->recurring(0.25 => sub {...});
.Ve
.PP
Create a new recurring timer, invoking the callback repeatedly after a given
amount of time in seconds.
.SS "start"
.IX Subsection "start"
.Vb 1
\&  $reactor\->start;
.Ve
.PP
Start watching for I/O and timer events, this will block until \*(L"stop\*(R" is
called or no events are being watched anymore.
.PP
.Vb 2
\&  # Start reactor only if it is not running already
\&  $reactor\->start unless $reactor\->is_running;
.Ve
.SS "stop"
.IX Subsection "stop"
.Vb 1
\&  $reactor\->stop;
.Ve
.PP
Stop watching for I/O and timer events.
.SS "timer"
.IX Subsection "timer"
.Vb 1
\&  my $id = $reactor\->timer(0.5 => sub {...});
.Ve
.PP
Create a new timer, invoking the callback after a given amount of time in
seconds.
.SS "watch"
.IX Subsection "watch"
.Vb 1
\&  $reactor = $reactor\->watch($handle, $readable, $writable);
.Ve
.PP
Change I/O events to watch handle for with true and false values. Note that
this method requires an active I/O watcher.
.PP
.Vb 2
\&  # Watch only for readable events
\&  $reactor\->watch($handle, 1, 0);
\&
\&  # Watch only for writable events
\&  $reactor\->watch($handle, 0, 1);
\&
\&  # Watch for readable and writable events
\&  $reactor\->watch($handle, 1, 1);
\&
\&  # Pause watching for events
\&  $reactor\->watch($handle, 0, 0);
.Ve
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Mojolicious, Mojolicious::Guides, <https://mojolicious.org>.