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package Mojo::Reactor::EV; |
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use Mojo::Base 'Mojo::Reactor::Poll'; |
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use Carp qw(croak); |
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1651
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use EV 4.32; |
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my $EV; |
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sub DESTROY { undef $EV } |
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sub again { |
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my ($self, $id, $after) = @_; |
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croak 'Timer not active' unless my $timer = $self->{timers}{$id}; |
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my $w = $timer->{watcher}; |
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defined $after ? $w->set($after, $w->repeat ? $after : 0) : $w->again; |
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} |
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# We have to fall back to Mojo::Reactor::Poll, since EV is unique |
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sub new { $EV++ ? Mojo::Reactor::Poll->new : shift->SUPER::new } |
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sub one_tick { |
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my $self = shift; |
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local $self->{running} = 1 unless $self->{running}; |
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EV::run(EV::RUN_ONCE); |
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} |
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sub recurring { shift->_timer(1, @_) } |
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sub start { |
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my $self = shift; |
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local $self->{running} = 1 unless $self->{running}; |
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EV::run; |
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} |
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sub stop { EV::break(EV::BREAK_ALL) } |
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sub timer { shift->_timer(0, @_) } |
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sub watch { |
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my ($self, $handle, $read, $write) = @_; |
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my $fd = fileno $handle; |
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croak 'I/O watcher not active' unless my $io = $self->{io}{$fd}; |
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my $mode = 0; |
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$mode |= EV::READ if $read; |
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$mode |= EV::WRITE if $write; |
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if ($mode == 0) { delete $io->{watcher} } |
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elsif (my $w = $io->{watcher}) { $w->events($mode) } |
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else { |
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my $cb = sub { |
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my ($w, $revents) = @_; |
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$self->_try('I/O watcher', $self->{io}{$fd}{cb}, 0) if EV::READ & $revents; |
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$self->_try('I/O watcher', $self->{io}{$fd}{cb}, 1) if EV::WRITE & $revents && $self->{io}{$fd}; |
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}; |
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$io->{watcher} = EV::io($fd, $mode, $cb); |
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} |
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60
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return $self; |
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} |
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sub _timer { |
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my ($self, $recurring, $after, $cb) = @_; |
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$after ||= 0.0001 if $recurring; |
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my $id = $self->_id; |
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my $wrapper = sub { |
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delete $self->{timers}{$id} unless $recurring; |
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$self->_try('Timer', $cb); |
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}; |
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EV::now_update() if $after > 0; |
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$self->{timers}{$id}{watcher} = EV::timer($after, $after, $wrapper); |
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return $id; |
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} |
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1; |
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=encoding utf8 |
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=head1 NAME |
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Mojo::Reactor::EV - Low-level event reactor with libev support |
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=head1 SYNOPSIS |
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use Mojo::Reactor::EV; |
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90
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# Watch if handle becomes readable or writable |
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my $reactor = Mojo::Reactor::EV->new; |
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$reactor->io($first => sub ($reactor, $writable) { |
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say $writable ? 'First handle is writable' : 'First handle is readable'; |
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}); |
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# Change to watching only if handle becomes writable |
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$reactor->watch($first, 0, 1); |
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# Turn file descriptor into handle and watch if it becomes readable |
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my $second = IO::Handle->new_from_fd($fd, 'r'); |
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$reactor->io($second => sub ($reactor, $writable) { |
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say $writable ? 'Second handle is writable' : 'Second handle is readable'; |
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})->watch($second, 1, 0); |
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# Add a timer |
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$reactor->timer(15 => sub ($reactor) { |
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$reactor->remove($first); |
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$reactor->remove($second); |
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say 'Timeout!'; |
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}); |
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# Start reactor if necessary |
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$reactor->start unless $reactor->is_running; |
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115
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=head1 DESCRIPTION |
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117
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L is a low-level event reactor based on L (4.32+). |
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119
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=head1 EVENTS |
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121
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L inherits all events from L. |
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=head1 METHODS |
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125
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L inherits all methods from L and implements the following new ones. |
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127
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=head2 again |
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129
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$reactor->again($id); |
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$reactor->again($id, 0.5); |
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132
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Restart timer and optionally change the invocation time. Note that this method requires an active timer. |
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=head2 new |
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my $reactor = Mojo::Reactor::EV->new; |
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138
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Construct a new L object. |
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=head2 one_tick |
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$reactor->one_tick; |
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144
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Run reactor until an event occurs or no events are being watched anymore. |
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# Don't block longer than 0.5 seconds |
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my $id = $reactor->timer(0.5 => sub {}); |
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$reactor->one_tick; |
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$reactor->remove($id); |
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151
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=head2 recurring |
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153
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my $id = $reactor->recurring(0.25 => sub {...}); |
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155
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Create a new recurring timer, invoking the callback repeatedly after a given amount of time in seconds. |
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157
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=head2 start |
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159
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$reactor->start; |
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161
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Start watching for I/O and timer events, this will block until L is called or no events are being watched |
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anymore. |
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164
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# Start reactor only if it is not running already |
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$reactor->start unless $reactor->is_running; |
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167
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=head2 stop |
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169
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$reactor->stop; |
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171
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Stop watching for I/O and timer events. |
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173
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=head2 timer |
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175
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my $id = $reactor->timer(0.5 => sub {...}); |
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177
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Create a new timer, invoking the callback after a given amount of time in seconds. |
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179
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=head2 watch |
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181
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$reactor = $reactor->watch($handle, $readable, $writable); |
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183
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Change I/O events to watch handle for with true and false values. Note that this method requires an active I/O watcher. |
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185
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# Watch only for readable events |
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$reactor->watch($handle, 1, 0); |
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188
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# Watch only for writable events |
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$reactor->watch($handle, 0, 1); |
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191
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# Watch for readable and writable events |
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$reactor->watch($handle, 1, 1); |
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# Pause watching for events |
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$reactor->watch($handle, 0, 0); |
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197
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=head1 SEE ALSO |
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199
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L, L, L. |
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201
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=cut |