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=head1 NAME |
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|
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Coro::Event - do events the coro-way |
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|
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=head1 SYNOPSIS |
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|
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use Coro; |
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use Coro::Event; |
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|
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sub keyboard : Coro { |
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my $w = Coro::Event->io(fd => *STDIN, poll => 'r'); |
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while() { |
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print "cmd> "; |
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my $ev = $w->next; my $cmd = <STDIN>; |
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print "data> "; |
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my $ev = $w->next; my $data = <STDIN>; |
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} |
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} |
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|
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=head1 DESCRIPTION |
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|
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This module enables you to create programs using the powerful Event modell |
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(and module), while retaining the linear style known from simple or |
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threaded programs. |
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|
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This module provides a method and a function for every watcher type |
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(I<flavour>) (see L<Event>). The only difference between these and the |
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watcher constructors from Event is that you do not specify a callback |
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function - it will be managed by this module. |
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|
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Your application should just create all necessary coroutines and then call |
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Coro::Event->main. |
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|
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=over 4 |
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|
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=cut |
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|
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package Coro::Event; |
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|
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no warnings; |
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|
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use Coro::Channel; |
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|
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use base 'Event'; |
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use base 'Exporter'; |
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|
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$VERSION = 0.01; |
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|
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=item Coro::Event->flavour(args...) |
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|
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Create and return a watcher of the given type. |
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|
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Examples: |
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|
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my $reader = Coro::Event->io(fd => $filehandle, poll => 'r'); |
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$reader->next; |
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|
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=cut |
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|
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=item do_flavour(args...) |
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|
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Create a watcher of the given type and immediately call it's next |
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method. This is less efficient then calling the constructor once and the |
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next method often, but it does save typing sometimes. |
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|
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=cut |
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|
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for my $flavour (qw(idle var timer io signal)) { |
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push @EXPORT, "do_$flavour"; |
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my $new = \&{"Event::$flavour"}; |
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my $class = "Coro::Event::$flavour"; |
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@{"${class}::ISA"} = ("Coro::Event", "Event::$flavour"); |
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my $coronew = sub { |
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# how does one do method-call-by-name? |
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# my $w = $class->SUPER::$flavour(@_); |
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|
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my $q = new Coro::Channel 0; |
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my $w; |
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$w = $new->(@_, parked => 1, cb => sub { $w->stop; $q->put($_[0]) }); |
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$w->private($q); # using private as attribute is pretty useless... |
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bless $w, $class; # reblessing due to broken Event |
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}; |
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*{ $flavour } = $coronew; |
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*{"do_$flavour"} = sub { |
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unshift @_, $class; |
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(&$coronew)->next; |
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}; |
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} |
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|
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=item $w->next |
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|
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Return the next event of the event queue of the watcher. |
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|
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=cut |
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|
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sub next { |
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$_[0]->start; |
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$_[0]->private->get; |
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} |
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|
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=item Coro::Event->main |
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|
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=cut |
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|
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sub main { |
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local $Coro::idle = new Coro sub { |
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Event::loop; |
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}; |
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Coro::schedule; |
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} |
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|
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1; |
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|
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=head1 BUGS |
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|
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This module is implemented straightforward using Coro::Channel and thus |
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not as efficient as possible. |
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|
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=head1 AUTHOR |
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|
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Marc Lehmann <pcg@goof.com> |
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http://www.goof.com/pcg/marc/ |
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|
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=cut |
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|
