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# $Id: Timer.pm,v 1.1.1.1 2002/03/05 16:34:19 dgl Exp $
=head1 NAME
Timer.pm
=head1 EXAMPLES
use Timer;
$timer = Timer->new;
$timer->addonce(code => \&somesub, data => 'moo', interval => 10);
sub somesub { print shift }
$timer->add(code => sub {
my($timer,$data) = @_;
print "Called $timer->{id} with $data\n";
}, data => 'oink', interval => 1, count => 10);
# Obviously fit $timer->run into how your program needs to use it.
sleep 1;
sleep 1 while $timer->run;
=head1 METHODS
=head2 add
add( code => \&codref, # \&code, sub { print blah..} etc..
data => 'data', # This data is passed back to the coderef when run
interval => num, # Time between being run..
count => [num | undef ], # number of times to run, undef == forever
);
=head2 addonce
Wrapper to add, option count is already set to 1
=head2 addforever
Wrapper to add, option count is set to undef
=head2 delete
delete($id);
=head2 get
returns anon hash specified by $id
=head2 run
checks for timers that need running, returns number actually run.
=head2 call
used internally by run to call an timer when it needs running
=head2 exists
returns true if the timer exists
=cut
package Timer;
use strict;
sub new {
my $class = shift;
# notice it's an array, not a hash
return bless [], $class;
}
sub add {
my($self,%timer) = @_;
my $id = $self->_newid;
$$self[$id] =
{
code => $timer{code},
data => $timer{data},
interval => $timer{interval},
nextexec => $timer{interval} + time,
count => $timer{count} || undef,
'package' => (caller)[0],
id => $id
};
return $id;
}
sub remove_package {
my($self, $package) = @_;
for my $id(0 .. $#$self) {
next unless ref($$self[$id]) eq 'HASH';
if($$self[$id]->{package} eq $package) {
splice(@$self, $id, 1);
}
}
}
# Finds the next free id (element) in the array
sub _newid {
my $self = shift;
for my $id(0 .. $#$self) {
return $id unless ref($$self[$id]) eq 'HASH';
}
return scalar @$self;
}
sub addonce {
my($self,%timer) = @_;
$self->add(%timer,count => 1);
}
sub addforever {
my($self,%timer) = @_;
$self->add(%timer,count => undef);
}
sub delete {
my($self,$id) = @_;
return 0 unless $self->exists($id);
$$self[$id] = undef;
}
sub get {
my($self,$id) = @_;
return $$self[$id];
}
sub run {
my $self = shift;
my $time = time;
my $num = 0;
for my $id(0 .. $#$self) {
next unless ref($$self[$id]) eq 'HASH';
if($time >= $$self[$id]->{nextexec}) {
$self->call($id);
$num++;
}
}
return $num;
}
sub call {
my($self,$id) = @_;
my $timer = $self->get($id);
$timer->{count}-- if defined $timer->{count};
$timer->{nextexec} = $timer->{interval} + time;
# TODO: Make $timer into an object so things like $timer->delete work within
# the timer.
$timer->{code}->($timer,$timer->{data});
if(defined $timer->{count} && $timer->{count} <= 0) {
$self->delete($id);
return 0;
}
1;
}
sub exists {
my($self,$id) = @_;
return 1 if ref($$self[$id]) eq 'HASH';
0;
}
1;
|
