/usr/lib/perl5/Event.pm is in libevent-perl 1.15-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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BEGIN { # do the right thing for threads?
eval { require attrs; } or do {
$INC{'attrs.pm'} = "";
*attrs::import = sub {};
}
}
package Event;
require 5.006; #maybe
use base 'Exporter';
use Carp;
eval { require Carp::Heavy; }; # work around perl_call_pv bug XXX
use vars qw($VERSION @EXPORT_OK
$API $DebugLevel $Eval $DIED $Now);
$VERSION = '1.15';
# If we inherit DynaLoader then we inherit AutoLoader; Bletch!
require DynaLoader;
# DynaLoader calls dl_load_flags as a static method.
*dl_load_flags = DynaLoader->can('dl_load_flags');
(defined(&bootstrap)? \&bootstrap : \&DynaLoader::bootstrap)->
(__PACKAGE__, $VERSION);
$DebugLevel = 0;
$Eval = 0; # avoid because c_callback is exempt
$DIED = \&default_exception_handler;
@EXPORT_OK = qw(time all_events all_watchers all_running all_queued all_idle
one_event sweep loop unloop unloop_all sleep queue
queue_pending
QUEUES PRIO_NORMAL PRIO_HIGH NO_TIME_HIRES);
sub import {
my $pkg = shift;
our $NO_TIME_HIRES;
my @sym;
for my $sym (@_) {
if ($sym eq 'NO_TIME_HIRES') {
$NO_TIME_HIRES = 1;
} else {
push @sym, $sym;
}
}
if (!$NO_TIME_HIRES) {
eval { require Time::HiRes; };
if ($@ =~ /^Can\'t locate Time/) {
# OK, just continue
} elsif ($@) {
die if $@;
} else {
cache_time_api(); # hook in high precision time
}
}
$pkg->export_to_level(1, undef, @sym);
}
# broadcast_adjust for Time::Warp? XXX
sub _load_watcher {
my $sub = shift;
eval { require "Event/$sub.pm" };
die if $@;
croak "Event/$sub.pm did not define Event::$sub\::new"
unless defined &$sub;
1;
}
sub AUTOLOAD {
my $sub = ($Event::AUTOLOAD =~ /(\w+)$/)[0];
_load_watcher($sub) or croak $@ . ', Undefined subroutine &' . $sub;
carp "Autoloading with Event->$sub(...) is deprecated;
\tplease 'use Event::type qw($sub);' explicitly";
goto &$sub;
}
sub default_exception_handler {
my ($run,$err) = @_;
my $desc = '?';
my $w;
if ($run and ($w = $run->w)) {
$desc = "`".$w->desc."'";
}
my $m = "Event: trapped error in $desc: $err";
$m .= "\n" if $m !~ m/\n$/;
warn $m;
#Carp::cluck "Event: fatal error trapped in '$desc'";
}
sub verbose_exception_handler { #AUTOLOAD XXX
my ($e,$err) = @_;
my $m = "Event: trapped error: $err";
$m .= "\n" if $m !~ m/\n$/;
return warn $m if !$e;
my $w = $e->w;
$m .= " in $w --\n";
for my $k ($w->attributes) {
$m .= sprintf "%18s: ", $k;
eval {
my $v = $w->$k();
if (!defined $v) {
$m .= '<undef>';
} elsif ($v =~ /^-?\d+(\.\d+)?$/) {
$m .= $v;
} else {
$m .= "'$v'";
}
};
if ($@) { $m .= "[$@]"; $@=''; }
$m .= "\n";
}
warn $m;
}
sub sweep {
my $prio = @_ ? shift : QUEUES();
queue_pending();
my $errsv = '';
while (1) {
eval { $@ = $errsv; _empty_queue($prio) };
$errsv = $@;
if ($@) {
# if ($Event::DebugLevel >= 2) {
# my $e = all_running();
# warn "Event: '$e->{desc}' died with: $@";
# }
next
}
last;
}
}
use vars qw($Result $TopResult);
my $loop_timer;
sub loop {
use integer;
if (@_) {
my $how_long = shift;
if (!$loop_timer) {
$loop_timer = Event->timer(desc => "Event::loop timeout",
after => $how_long,
cb => sub { unloop($how_long) },
parked=>1);
$loop_timer->prio(PRIO_HIGH());
} else {
$loop_timer->at(Event::time() + $how_long),
}
$loop_timer->start;
}
$TopResult = undef; # allow re-entry of loop after unloop_all
local $Result = undef;
_incr_looplevel();
my $errsv = '';
while (1) {
# like G_EVAL | G_KEEPERR
eval { $@ = $errsv; _loop() };
$errsv = $@;
if ($@) {
warn "Event::loop caught: $@"
if $Event::DebugLevel >= 4;
next
}
last;
}
_decr_looplevel();
$loop_timer->stop if $loop_timer;
my $r = $Result;
$r = $TopResult if !defined $r;
warn "Event: unloop(".(defined $r?$r:'<undef>').")\n"
if $Event::DebugLevel >= 3;
$r
}
sub add_hooks {
shift if @_ & 1; #?
while (@_) {
my $k = shift;
my $v = shift;
croak "$v must be CODE" if ref $v ne 'CODE';
_add_hook($k, $v);
}
}
END { $_->cancel for all_watchers() } # buggy? XXX
package Event::Event::Io;
use vars qw(@ISA);
@ISA = 'Event::Event';
package Event::Event::Dataful;
use vars qw(@ISA);
@ISA = 'Event::Event';
package Event;
require Event::Watcher;
_load_watcher($_) for qw(idle io signal timer var);
# Provide hints to Inline.pm for usage:
# use Inline with => 'Event';
sub Inline {
my $language = shift;
if ($language ne 'C') {
warn "Warning: Event.pm does not provide Inline hints for the $language language\n";
return
}
require Event::MakeMaker;
my $path = $Event::MakeMaker::installsitearch;
require Config;
my $so = $Config::Config{so};
return {
INC => "-I $path/Event",
TYPEMAPS => "$path/Event/typemap",
MYEXTLIB => "$path/auto/Event/Event.$so",
AUTO_INCLUDE => '#include "EventAPI.h"',
BOOT => 'I_EVENT_API("Inline");',
};
}
1;
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