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package IO::AsyncX::EventFD 0.001; |
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# ABSTRACT: Linux eventfd support for IO::Async |
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57788
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use strict; |
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use warnings; |
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use parent qw(IO::Async::Notifier); |
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=head1 NAME |
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IO::AsyncX::EventFD - simple eventfd notifications |
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=head1 SYNOPSIS |
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#!/usr/bin/env perl |
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use strict; |
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use warnings; |
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use IO::Async::Loop; |
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use IO::AsyncX::EventFD; |
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my $loop = IO::Async::Loop->new; |
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$loop->add(my $eventfd = IO::AsyncX::EventFD->new(notify => sub { |
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warn "Had event\n" |
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})); |
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$loop->loop_once(0.001); |
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warn "Notifying...\n"; |
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$eventfd->notify; |
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$loop->loop_once(0.001); |
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=head1 DESCRIPTION |
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Provides a very thin layer over L. |
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=cut |
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use IO::Async::Handle; |
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use Linux::FD; |
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8594
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use curry::weak; |
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use mro; |
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=head1 METHODS |
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=head2 notify |
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Sends a notification to the event FD. This consists of a call to |
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L with the value 1. |
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=cut |
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sub notify { |
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my ($self) = @_; |
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$self->handle->read_handle->add(1); |
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$self |
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} |
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=head2 eventfd |
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Returns the L handle. |
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=cut |
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0
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sub eventfd { shift->handle->read_handle } |
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=head2 configure |
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Configuration. Currently supports the following named parameters: |
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=over 4 |
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=item * notify - the callback which will be triggered when there's a new semaphore value |
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=back |
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=cut |
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sub configure { |
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1
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1
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1
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4210
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my ($self, %args) = @_; |
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1
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5
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for(qw(notify)) { |
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1
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$self->{$_} = delete $args{$_} if exists $args{$_}; |
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} |
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1
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10
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$self->next::method(%args); |
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} |
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=head1 METHODS - Internal |
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=cut |
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=head2 _add_to_loop |
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Called when we are added to the loop. |
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=cut |
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sub _add_to_loop { |
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1
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547
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my ($self, $loop) = @_; |
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1
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44
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my $fd = Linux::FD::Event->new(0, qw(non-blocking semaphore)); |
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$self->add_child( |
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1
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12
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$self->{handle} = IO::Async::Handle->new( |
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read_handle => $fd, |
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on_read_ready => $self->curry::weak::on_read_ready, |
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) |
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); |
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} |
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=head2 on_read_ready |
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Called when there's a read event. |
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=cut |
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113
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sub on_read_ready { |
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1
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1
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1
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673
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my ($self) = @_; |
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1
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50
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3
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return unless my $h = $self->handle->read_handle; |
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1
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$self->{notify}->() while $h->get and $self->{notify}; |
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} |
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119
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=head2 handle |
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121
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Returns the underlying L instance. |
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=cut |
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2
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10
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sub handle { shift->{handle} } |
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1; |
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__END__ |