Author: msergeant
Date: Mon Jul 11 12:11:11 2005
New Revision: 497
Added:
trunk/lib/Danga/
trunk/lib/Danga/Client.pm
trunk/lib/Danga/DNS/
trunk/lib/Danga/DNS.pm
trunk/lib/Danga/DNS/Resolver.pm
trunk/lib/Danga/Socket.pm
trunk/lib/Danga/TimeoutSocket.pm
Log:
MERGE r386:r480 FROM https://svn.perl.org/qpsmtpd/branches/high_perf
High perf branch merge and fixes
Added: trunk/lib/Danga/Client.pm
==============================================================================
--- (empty file)
+++ trunk/lib/Danga/Client.pm Mon Jul 11 12:11:11 2005
@@ -0,0 +1,147 @@
+# $Id: Client.pm,v 1.8 2005/02/14 22:06:38 msergeant Exp $
+
+package Danga::Client;
+use base 'Danga::TimeoutSocket';
+use fields qw(line closing disable_read can_read_mode);
+use Time::HiRes ();
+
+# 30 seconds max timeout!
+sub max_idle_time { 30 }
+sub max_connect_time { 1200 }
+
+sub new {
+ my Danga::Client $self = shift;
+ $self = fields::new($self) unless ref $self;
+ $self->SUPER::new( @_ );
+
+ $self->reset_for_next_message;
+ return $self;
+}
+
+sub reset_for_next_message {
+ my Danga::Client $self = shift;
+ $self->{line} = '';
+ $self->{disable_read} = 0;
+ $self->{can_read_mode} = 0;
+ return $self;
+}
+
+sub get_line {
+ my Danga::Client $self = shift;
+ if (!$self->have_line) {
+ $self->SetPostLoopCallback(sub { $self->have_line ? 0 : 1 });
+ #warn("get_line PRE\n");
+ $self->EventLoop();
+ #warn("get_line POST\n");
+ $self->disable_read();
+ }
+ return if $self->{closing};
+ # now have a line.
+ $self->{alive_time} = time;
+ $self->{line} =~ s/^(.*?\n)//;
+ return $1;
+}
+
+sub can_read {
+ my Danga::Client $self = shift;
+ my ($timeout) = @_;
+ my $end = Time::HiRes::time() + $timeout;
+ # warn("Calling can-read\n");
+ $self->{can_read_mode} = 1;
+ if (!length($self->{line})) {
+ $self->disable_read();
+ # loop because any callback, not just ours, can make EventLoop return
+ while( !(length($self->{line}) || (Time::HiRes::time > $end)) ) {
+ $self->SetPostLoopCallback(sub { (length($self->{line}) ||
+ (Time::HiRes::time > $end)) ? 0 :
1 });
+ #warn("get_line PRE\n");
+ $self->EventLoop();
+ #warn("get_line POST\n");
+ }
+ $self->enable_read();
+ }
+ $self->{can_read_mode} = 0;
+ $self->SetPostLoopCallback(undef);
+ return if $self->{closing};
+ $self->{alive_time} = time;
+ # warn("can_read returning for '$self->{line}'\n");
+ return 1 if length($self->{line});
+ return;
+}
+
+sub have_line {
+ my Danga::Client $self = shift;
+ return 1 if $self->{closing};
+ if ($self->{line} =~ /\n/) {
+ return 1;
+ }
+ return 0;
+}
+
+sub event_read {
+ my Danga::Client $self = shift;
+ my $bref = $self->read(8192);
+ return $self->close($!) unless defined $bref;
+ # $self->watch_read(0);
+ $self->process_read_buf($bref);
+}
+
+sub process_read_buf {
+ my Danga::Client $self = shift;
+ my $bref = shift;
+ $self->{line} .= $$bref;
+ return if ! $self->readable();
+ return if $::LineMode;
+
+ while ($self->{line} =~ s/^(.*?\n)//) {
+ my $line = $1;
+ $self->{alive_time} = time;
+ my $resp = $self->process_line($line);
+ if ($::DEBUG > 1 and $resp) { print "$$:".($self+0)."S: $_\n" for
split(/\n/, $resp) }
+ $self->write($resp) if $resp;
+ $self->watch_read(0) if $self->{disable_read};
+ last if ! $self->readable();
+ }
+ if($self->have_line) {
+ $self->shift_back_read($self->{line});
+ $self->{line} = '';
+ }
+}
+
+sub readable {
+ my Danga::Client $self = shift;
+ return 0 if $self->{disable_read} > 0;
+ return 1;
+}
+
+sub disable_read {
+ my Danga::Client $self = shift;
+ $self->{disable_read}++;
+ $self->watch_read(0);
+}
+
+sub enable_read {
+ my Danga::Client $self = shift;
+ $self->{disable_read}--;
+ if ($self->{disable_read} <= 0) {
+ $self->{disable_read} = 0;
+ $self->watch_read(1);
+ }
+}
+
+sub process_line {
+ my Danga::Client $self = shift;
+ return '';
+}
+
+sub close {
+ my Danga::Client $self = shift;
+ $self->{closing} = 1;
+ print "closing @_\n" if $::DEBUG;
+ $self->SUPER::close(@_);
+}
+
+sub event_err { my Danga::Client $self = shift; $self->close("Error") }
+sub event_hup { my Danga::Client $self = shift; $self->close("Disconnect
(HUP)") }
+
+1;
Added: trunk/lib/Danga/DNS.pm
==============================================================================
--- (empty file)
+++ trunk/lib/Danga/DNS.pm Mon Jul 11 12:11:11 2005
@@ -0,0 +1,170 @@
+# $Id: DNS.pm,v 1.12 2005/02/14 22:06:08 msergeant Exp $
+
+package Danga::DNS;
+
+# This is the query class - it is really just an encapsulation of the
+# hosts you want to query, plus the callback. All the hard work is done
+# in Danga::DNS::Resolver.
+
+use fields qw(client hosts num_hosts callback results start);
+use strict;
+
+use Danga::DNS::Resolver;
+
+my $resolver;
+
+sub trace {
+ my $level = shift;
+ print STDERR ("[$$] dns lookup: @_") if $::DEBUG >= $level;
+}
+
+sub new {
+ my Danga::DNS $self = shift;
+ my %options = @_;
+
+ $resolver ||= Danga::DNS::Resolver->new();
+
+ my $client = $options{client};
+ $client->disable_read if $client;
+
+ $self = fields::new($self) unless ref $self;
+
+ $self->{hosts} = $options{hosts} ? $options{hosts} : [ $options{host} ];
+ $self->{num_hosts} = scalar(@{$self->{hosts}}) || "No hosts supplied";
+ $self->{client} = $client;
+ $self->{callback} = $options{callback} || die "No callback given";
+ $self->{results} = {};
+ $self->{start} = time;
+
+ if ($options{type}) {
+ if ($options{type} eq 'TXT') {
+ if (!$resolver->query_txt($self, @{$self->{hosts}})) {
+ $client->enable_read() if $client;
+ return;
+ }
+ }
+ elsif ($options{type} eq 'A') {
+ if (!$resolver->query($self, @{$self->{hosts}})) {
+ $client->enable_read() if $client;
+ return;
+ }
+ }
+ elsif ($options{type} eq 'PTR') {
+ if (!$resolver->query($self, @{$self->{hosts}})) {
+ $client->enable_read() if $client;
+ return;
+ }
+ }
+ elsif ($options{type} eq 'MX') {
+ if (!$resolver->query_mx($self, @{$self->{hosts}})) {
+ $client->enable_read() if $client;
+ return;
+ }
+ }
+ else {
+ die "Unsupported DNS query type: $options{type}";
+ }
+ }
+ else {
+ if (!$resolver->query($self, @{$self->{hosts}})) {
+ $client->enable_read() if $client;
+ return;
+ }
+ }
+
+ return $self;
+}
+
+sub run_callback {
+ my Danga::DNS $self = shift;
+ my ($result, $query) = @_;
+ $self->{results}{$query} = $result;
+ trace(2, "got $query => $result\n");
+ eval {
+ $self->{callback}->($result, $query);
+ };
+ if ($@) {
+ warn($@);
+ }
+}
+
+sub DESTROY {
+ my Danga::DNS $self = shift;
+ my $now = time;
+ foreach my $host (@{$self->{hosts}}) {
+ if (!exists($self->{results}{$host})) {
+ print STDERR "DNS timeout (presumably) looking for $host after " .
($now - $self->{start}) . " secs\n";
+ $self->{callback}->("NXDOMAIN", $host);
+ }
+ }
+ $self->{client}->enable_read if $self->{client};
+}
+
+1;
+
+=head1 NAME
+
+Danga::DNS - a DNS lookup class for the Danga::Socket framework
+
+=head1 SYNOPSIS
+
+ Danga::DNS->new(%options);
+
+=head1 DESCRIPTION
+
+This module performs asynchronous DNS lookups, making use of a single UDP
+socket (unlike Net::DNS's bgsend/bgread combination), and blocking reading on
+a client until the response comes back (this is useful for e.g. SMTP rDNS
+lookups where you want the answer before you see the next SMTP command).
+
+Currently this module will only perform A or PTR lookups. A rDNS (PTR) lookup
+will be performed if the host matches the regexp: C</^\d+\.\d+\.\d+.\d+$/>.
+
+The lookups time out after 15 seconds.
+
+=head1 API
+
+=head2 C<< Danga::DNS->new( %options ) >>
+
+Create a new DNS query. You do not need to store the resulting object as this
+class is all done with callbacks.
+
+Example:
+
+ Danga::DNS->new(
+ callback => sub { print "Got result: $_[0]\n" },
+ host => 'google.com',
+ );
+
+=over 4
+
+=item B<[required]> C<callback>
+
+The callback to call when results come in. This should be a reference to a
+subroutine. The callback receives two parameters - the result of the DNS lookup
+and the host that was looked up.
+
+=item C<host>
+
+A host name to lookup. Note that if the hostname is a dotted quad of numbers
then
+a reverse DNS (PTR) lookup is performend.
+
+=item C<hosts>
+
+An array-ref list of hosts to lookup.
+
+B<NOTE:> One of either C<host> or C<hosts> is B<required>.
+
+=item C<client>
+
+It is possible to specify a C<Danga::Client> object (or subclass) which you
wish
+to disable for reading until your DNS result returns.
+
+=item C<type>
+
+You can specify one of: I<"A">, I<"PTR"> or I<"TXT"> here. Other types may be
+supported in the future.
+
+=back
+
+=cut
Added: trunk/lib/Danga/DNS/Resolver.pm
==============================================================================
--- (empty file)
+++ trunk/lib/Danga/DNS/Resolver.pm Mon Jul 11 12:11:11 2005
@@ -0,0 +1,307 @@
+# $Id: Resolver.pm,v 1.3 2005/02/14 22:06:08 msergeant Exp $
+
+package Danga::DNS::Resolver;
+use base qw(Danga::Socket);
+
+use fields qw(res dst id_to_asker id_to_query timeout cache cache_timeout);
+
+use Net::DNS;
+use Socket;
+use strict;
+
+our $last_cleanup = 0;
+
+sub trace {
+ my $level = shift;
+ print ("$::DEBUG/$level [$$] dns lookup: @_") if $::DEBUG >= $level;
+}
+
+sub new {
+ my Danga::DNS::Resolver $self = shift;
+
+ $self = fields::new($self) unless ref $self;
+
+ my $res = Net::DNS::Resolver->new;
+
+ my $sock = IO::Socket::INET->new(
+ Proto => 'udp',
+ LocalAddr => $res->{'srcaddr'},
+ LocalPort => ($res->{'srcport'} || undef),
+ ) || die "Cannot create socket: $!";
+ IO::Handle::blocking($sock, 0);
+
+ trace(2, "Using nameserver $res->{nameservers}->[0]:$res->{port}\n");
+ my $dst_sockaddr = sockaddr_in($res->{'port'},
inet_aton($res->{'nameservers'}->[0]));
+ #my $dst_sockaddr = sockaddr_in($res->{'port'}, inet_aton('127.0.0.1'));
+ #my $dst_sockaddr = sockaddr_in($res->{'port'}, inet_aton('10.2.1.20'));
+
+ $self->{res} = $res;
+ $self->{dst} = $dst_sockaddr;
+ $self->{id_to_asker} = {};
+ $self->{id_to_query} = {};
+ $self->{timeout} = {};
+ $self->{cache} = {};
+ $self->{cache_timeout} = {};
+
+ $self->SUPER::new($sock);
+
+ $self->watch_read(1);
+
+ $self->AddTimer(5, sub { $self->_do_cleanup });
+
+ return $self;
+}
+
+sub pending {
+ my Danga::DNS::Resolver $self = shift;
+
+ return keys(%{$self->{id_to_asker}});
+}
+
+sub _query {
+ my Danga::DNS::Resolver $self = shift;
+ my ($asker, $host, $type, $now) = @_;
+
+ if ($ENV{NODNS}) {
+ $asker->run_callback("NXDNS", $host);
+ return 1;
+ }
+ if (exists $self->{cache}{$type}{$host}) {
+ # print "CACHE HIT!\n";
+ $asker->run_callback($self->{cache}{$type}{$host}, $host);
+ return 1;
+ }
+
+ my $packet = $self->{res}->make_query_packet($host, $type);
+ my $packet_data = $packet->data;
+
+ my $h = $packet->header;
+ my $id = $h->id;
+
+ if (!$self->sock->send($packet_data, 0, $self->{dst})) {
+ return;
+ }
+
+ trace(2, "Query: $host ($id)\n");
+
+ $self->{id_to_asker}->{$id} = $asker;
+ $self->{id_to_query}->{$id} = $host;
+ $self->{timeout}->{$id} = $now;
+
+ return 1;
+}
+
+sub query_txt {
+ my Danga::DNS::Resolver $self = shift;
+ my ($asker, @hosts) = @_;
+
+ my $now = time();
+
+ trace(2, "[" . keys(%{$self->{id_to_asker}}) . "] trying to resolve TXT:
@hosts\n");
+
+ foreach my $host (@hosts) {
+ $self->_query($asker, $host, 'TXT', $now) || return;
+ }
+
+ #print "+Pending queries: " . keys(%{$self->{id_to_asker}}) .
+ # " / Cache Size: " . keys(%{$self->{cache}}) . "\n";
+
+ return 1;
+}
+
+sub query_mx {
+ my Danga::DNS::Resolver $self = shift;
+ my ($asker, @hosts) = @_;
+
+ my $now = time();
+
+ trace(2, "[" . keys(%{$self->{id_to_asker}}) . "] trying to resolve MX:
@hosts\n");
+
+ foreach my $host (@hosts) {
+ $self->_query($asker, $host, 'MX', $now) || return;
+ }
+
+ #print "+Pending queries: " . keys(%{$self->{id_to_asker}}) .
+ # " / Cache Size: " . keys(%{$self->{cache}}) . "\n";
+
+ return 1;
+}
+
+sub query {
+ my Danga::DNS::Resolver $self = shift;
+ my ($asker, @hosts) = @_;
+
+ my $now = time();
+
+ trace(2, "[" . keys(%{$self->{id_to_asker}}) . "] trying to resolve A/PTR:
@hosts\n");
+
+ foreach my $host (@hosts) {
+ $self->_query($asker, $host, 'A', $now) || return;
+ }
+
+ #print "+Pending queries: " . keys(%{$self->{id_to_asker}}) .
+ # " / Cache Size: " . keys(%{$self->{cache}}) . "\n";
+
+ return 1;
+}
+
+sub _do_cleanup {
+ my Danga::DNS::Resolver $self = shift;
+ my $now = time;
+
+ $self->AddTimer(5, sub { $self->_do_cleanup });
+
+ my $idle = $self->max_idle_time;
+
+ my @to_delete;
+ while (my ($id, $t) = each(%{$self->{timeout}})) {
+ if ($t < ($now - $idle)) {
+ push @to_delete, $id;
+ }
+ }
+
+ foreach my $id (@to_delete) {
+ delete $self->{timeout}{$id};
+ my $asker = delete $self->{id_to_asker}{$id};
+ my $query = delete $self->{id_to_query}{$id};
+ $asker->run_callback("NXDOMAIN", $query);
+ }
+
+ foreach my $type ('A', 'TXT') {
+ @to_delete = ();
+
+ while (my ($query, $t) = each(%{$self->{cache_timeout}{$type}})) {
+ if ($t < $now) {
+ push @to_delete, $query;
+ }
+ }
+
+ foreach my $q (@to_delete) {
+ delete $self->{cache_timeout}{$type}{$q};
+ delete $self->{cache}{$type}{$q};
+ }
+ }
+}
+
+# seconds max timeout!
+sub max_idle_time { 30 }
+
+# Danga::DNS
+sub event_err { shift->close("dns socket error") }
+sub event_hup { shift->close("dns socket error") }
+
+sub event_read {
+ my Danga::DNS::Resolver $self = shift;
+
+ while (my $packet = $self->{res}->bgread($self->sock)) {
+ my $err = $self->{res}->errorstring;
+ my $answers = 0;
+ my $header = $packet->header;
+ my $id = $header->id;
+
+ my $asker = delete $self->{id_to_asker}->{$id};
+ my $query = delete $self->{id_to_query}->{$id};
+ delete $self->{timeout}{$id};
+
+ #print "-Pending queries: " . keys(%{$self->{id_to_asker}}) .
+ # " / Cache Size: " . keys(%{$self->{cache}}) . "\n";
+ if (!$asker) {
+ trace(1, "No asker for id: $id\n");
+ return;
+ }
+
+ my $now = time();
+ my @questions = $packet->question;
+ #print STDERR "response to ", $questions[0]->string, "\n";
+ foreach my $rr ($packet->answer) {
+ # my $q = shift @questions;
+ if ($rr->type eq "PTR") {
+ my $rdns = $rr->ptrdname;
+ if ($query) {
+ # NB: Cached as an "A" lookup as there's no overlap and
they
+ # go through the same query() function above
+ $self->{cache}{A}{$query} = $rdns;
+ $self->{cache_timeout}{A}{$query} = $now + 60; # should
use $rr->ttl but that would cache for too long
+ }
+ $asker->run_callback($rdns, $query);
+ }
+ elsif ($rr->type eq "A") {
+ my $ip = $rr->address;
+ if ($query) {
+ $self->{cache}{A}{$query} = $ip;
+ $self->{cache_timeout}{A}{$query} = $now + 60; # should
use $rr->ttl but that would cache for too long
+ }
+ $asker->run_callback($ip, $query);
+ }
+ elsif ($rr->type eq "TXT") {
+ my $txt = $rr->txtdata;
+ if ($query) {
+ $self->{cache}{TXT}{$query} = $txt;
+ $self->{cache_timeout}{TXT}{$query} = $now + 60; # should
use $rr->ttl but that would cache for too long
+ }
+ $asker->run_callback($txt, $query);
+ }
+ else {
+ # came back, but not a PTR or A record
+ $asker->run_callback("unknown", $query);
+ }
+ $answers++;
+ }
+ if (!$answers) {
+ if ($err eq "NXDOMAIN") {
+ # trace("found => NXDOMAIN\n");
+ $asker->run_callback("NXDOMAIN", $query);
+ }
+ elsif ($err eq "SERVFAIL") {
+ # try again???
+ print "SERVFAIL looking for $query (Pending: " .
keys(%{$self->{id_to_asker}}) . ")\n";
+ #$self->query($asker, $query);
+ $asker->run_callback($err, $query);
+ #$self->{id_to_asker}->{$id} = $asker;
+ #$self->{id_to_query}->{$id} = $query;
+ #$self->{timeout}{$id} = time();
+
+ }
+ elsif ($err eq "NOERROR") {
+ $asker->run_callback($err, $query);
+ }
+ elsif($err) {
+ print("error: $err\n");
+ $asker->run_callback($err, $query);
+ }
+ else {
+ # trace("no answers\n");
+ $asker->run_callback("NXDOMAIN", $query);
+ }
+ }
+ }
+}
+
+use Carp qw(confess);
+
+sub close {
+ my Danga::DNS::Resolver $self = shift;
+
+ $self->SUPER::close(shift);
+ # confess "Danga::DNS::Resolver socket should never be closed!";
+}
+
+1;
+
+=head1 NAME
+
+Danga::DNS::Resolver - an asynchronous DNS resolver class
+
+=head1 SYNOPSIS
+
+ my $res = Danga::DNS::Resolver->new();
+
+ $res->query($obj, @hosts); # $obj implements $obj->run_callback()
+
+=head1 DESCRIPTION
+
+This is a low level DNS resolver class that works within the Danga::Socket
+asynchronous I/O framework. Do not attempt to use this class standalone - use
+the C<Danga::DNS> class instead.
+
+=cut
Added: trunk/lib/Danga/Socket.pm
==============================================================================
--- (empty file)
+++ trunk/lib/Danga/Socket.pm Mon Jul 11 12:11:11 2005
@@ -0,0 +1,899 @@
+###########################################################################
+
+=head1 NAME
+
+Danga::Socket - Event-driven async IO class
+
+=head1 SYNOPSIS
+
+ use base ('Danga::Socket');
+
+=head1 DESCRIPTION
+
+This is an abstract base class which provides the basic framework for
+event-driven asynchronous IO.
+
+=cut
+
+###########################################################################
+
+package Danga::Socket;
+use strict;
+
+use vars qw{$VERSION};
+$VERSION = do { my @r = (q$Revision: 1.4 $ =~ /\d+/g); sprintf "%d."."%02d" x
$#r, @r };
+
+use fields qw(sock fd write_buf write_buf_offset write_buf_size
+ read_push_back post_loop_callback
+ peer_ip
+ closed event_watch debug_level);
+
+use Errno qw(EINPROGRESS EWOULDBLOCK EISCONN
+ EPIPE EAGAIN EBADF ECONNRESET);
+
+use Socket qw(IPPROTO_TCP);
+use Carp qw{croak confess};
+
+use constant TCP_CORK => 3; # FIXME: not hard-coded (Linux-specific too)
+
+use constant DebugLevel => 0;
+
+# for epoll definitions:
+our $HAVE_SYSCALL_PH = eval { require 'syscall.ph'; 1 } || eval { require
'sys/syscall.ph'; 1 };
+our $HAVE_KQUEUE = eval { require IO::KQueue; 1 };
+
+# Explicitly define the poll constants, as either one set or the other won't be
+# loaded. They're also badly implemented in IO::Epoll:
+# The IO::Epoll module is buggy in that it doesn't export constants efficiently
+# (at least as of 0.01), so doing constants ourselves saves 13% of the user CPU
+# time
+use constant EPOLLIN => 1;
+use constant EPOLLOUT => 4;
+use constant EPOLLERR => 8;
+use constant EPOLLHUP => 16;
+use constant EPOLL_CTL_ADD => 1;
+use constant EPOLL_CTL_DEL => 2;
+use constant EPOLL_CTL_MOD => 3;
+
+use constant POLLIN => 1;
+use constant POLLOUT => 4;
+use constant POLLERR => 8;
+use constant POLLHUP => 16;
+use constant POLLNVAL => 32;
+
+# keep track of active clients
+our (
+ $HaveEpoll, # Flag -- is epoll available? initially
undefined.
+ $HaveKQueue,
+ %DescriptorMap, # fd (num) -> Danga::Socket object
+ %PushBackSet, # fd (num) -> Danga::Socket (fds with pushed
back read data)
+ $Epoll, # Global epoll fd (for epoll mode only)
+ $KQueue, # Global kqueue fd (for kqueue mode only)
+ @ToClose, # sockets to close when event loop is done
+ %OtherFds, # A hash of "other" (non-Danga::Socket) file
+ # descriptors for the event loop to track.
+ $PostLoopCallback, # subref to call at the end of each loop, if
defined
+ %PLCMap, # fd (num) -> PostLoopCallback
+ @Timers, # timers
+ );
+
+%OtherFds = ();
+
+#####################################################################
+### C L A S S M E T H O D S
+#####################################################################
+
+### (CLASS) METHOD: HaveEpoll()
+### Returns a true value if this class will use IO::Epoll for async IO.
+sub HaveEpoll { $HaveEpoll };
+
+### (CLASS) METHOD: WatchedSockets()
+### Returns the number of file descriptors which are registered with the global
+### poll object.
+sub WatchedSockets {
+ return scalar keys %DescriptorMap;
+}
+*watched_sockets = *WatchedSockets;
+
+
+### (CLASS) METHOD: ToClose()
+### Return the list of sockets that are awaiting close() at the end of the
+### current event loop.
+sub ToClose { return @ToClose; }
+
+
+### (CLASS) METHOD: OtherFds( [%fdmap] )
+### Get/set the hash of file descriptors that need processing in parallel with
+### the registered Danga::Socket objects.
+sub OtherFds {
+ my $class = shift;
+ if ( @_ ) { %OtherFds = @_ }
+ return wantarray ? %OtherFds : \%OtherFds;
+}
+
+sub AddTimer {
+ my $class = shift;
+ my ($secs, $coderef) = @_;
+ my $timeout = time + $secs;
+
+ if ([EMAIL PROTECTED] || ($timeout >= $Timers[-1][0])) {
+ push @Timers, [$timeout, $coderef];
+ return;
+ }
+
+ # Now where do we insert...
+ for (my $i = 0; $i < @Timers; $i++) {
+ if ($Timers[$i][0] > $timeout) {
+ splice(@Timers, $i, 0, [$timeout, $coderef]);
+ return;
+ }
+ }
+
+ die "Shouldn't get here spank matt.";
+}
+
+### (CLASS) METHOD: DescriptorMap()
+### Get the hash of Danga::Socket objects keyed by the file descriptor they are
+### wrapping.
+sub DescriptorMap {
+ return wantarray ? %DescriptorMap : \%DescriptorMap;
+}
+*descriptor_map = *DescriptorMap;
+*get_sock_ref = *DescriptorMap;
+
+sub init_poller
+{
+ return if defined $HaveEpoll || $HaveKQueue;
+
+ if ($HAVE_KQUEUE) {
+ $KQueue = IO::KQueue->new();
+ $HaveKQueue = $KQueue >= 0;
+ if ($HaveKQueue) {
+ *EventLoop = *KQueueEventLoop;
+ }
+ }
+ else {
+ $Epoll = eval { epoll_create(1024); };
+ $HaveEpoll = $Epoll >= 0;
+ if ($HaveEpoll) {
+ *EventLoop = *EpollEventLoop;
+ }
+ }
+
+ if (!$HaveEpoll && !$HaveKQueue) {
+ require IO::Poll;
+ *EventLoop = *PollEventLoop;
+ }
+}
+
+### FUNCTION: EventLoop()
+### Start processing IO events.
+sub EventLoop {
+ my $class = shift;
+
+ init_poller();
+
+ if ($HaveEpoll) {
+ EpollEventLoop($class);
+ } else {
+ PollEventLoop($class);
+ }
+}
+
+### The kqueue-based event loop. Gets installed as EventLoop if IO::KQueue
works
+### okay.
+sub KQueueEventLoop {
+ my $class = shift;
+
+ foreach my $fd (keys %OtherFds) {
+ $KQueue->EV_SET($fd, IO::KQueue::EVFILT_READ(), IO::KQueue::EV_ADD());
+ }
+
+ while (1) {
+ my $now = time;
+ # Run expired timers
+ while (@Timers && $Timers[0][0] <= $now) {
+ my $to_run = shift(@Timers);
+ $to_run->[1]->($now);
+ }
+
+ # Get next timeout
+ my $timeout = @Timers ? ($Timers[0][0] - $now) : 1;
+ # print STDERR "kevent($timeout)\n";
+ my @ret = $KQueue->kevent($timeout * 1000);
+
+ foreach my $kev (@ret) {
+ my ($fd, $filter, $flags, $fflags) = @$kev;
+
+ my Danga::Socket $pob = $DescriptorMap{$fd};
+
+ # prioritise OtherFds first - likely to be accept() socks (?)
+ if (!$pob) {
+ if (my $code = $OtherFds{$fd}) {
+ $code->($filter);
+ }
+ else {
+ print STDERR "kevent() returned fd $fd for which we have
no mapping. removing.\n";
+ POSIX::close($fd); # close deletes the kevent entry
+ }
+ next;
+ }
+
+ DebugLevel >= 1 && $class->DebugMsg("Event: fd=%d (%s), flags=%d
\@ %s\n",
+ $fd, ref($pob),
$flags, time);
+
+ $pob->event_read if $filter == IO::KQueue::EVFILT_READ() &&
!$pob->{closed};
+ $pob->event_write if $filter == IO::KQueue::EVFILT_WRITE() &&
!$pob->{closed};
+ if ($flags == IO::KQueue::EV_EOF() && !$pob->{closed}) {
+ if ($fflags) {
+ $pob->event_err;
+ } else {
+ $pob->event_hup;
+ }
+ }
+ }
+
+ return unless PostEventLoop();
+ }
+
+ exit(0);
+}
+
+### The epoll-based event loop. Gets installed as EventLoop if IO::Epoll loads
+### okay.
+sub EpollEventLoop {
+ my $class = shift;
+
+ foreach my $fd ( keys %OtherFds ) {
+ epoll_ctl($Epoll, EPOLL_CTL_ADD, $fd, EPOLLIN);
+ }
+
+ while (1) {
+ my $now = time;
+ # Run expired timers
+ while (@Timers && $Timers[0][0] <= $now) {
+ my $to_run = shift(@Timers);
+ $to_run->[1]->($now);
+ }
+
+ # Get next timeout
+ my $timeout = @Timers ? ($Timers[0][0] - $now) : 1;
+
+ my @events;
+ my $i;
+ my $evcount = epoll_wait($Epoll, 1000, $timeout * 1000, [EMAIL
PROTECTED]);
+
+ EVENT:
+ for ($i=0; $i<$evcount; $i++) {
+ my $ev = $events[$i];
+
+ # it's possible epoll_wait returned many events, including some at
the end
+ # that ones in the front triggered unregister-interest actions.
if we
+ # can't find the %sock entry, it's because we're no longer
interested
+ # in that event.
+ my Danga::Socket $pob = $DescriptorMap{$ev->[0]};
+ my $code;
+ my $state = $ev->[1];
+
+ # if we didn't find a Perlbal::Socket subclass for that fd, try
other
+ # pseudo-registered (above) fds.
+ if (! $pob) {
+ if (my $code = $OtherFds{$ev->[0]}) {
+ $code->($state);
+ }
+ else {
+ my $fd = $ev->[0];
+ print STDERR "epoll() returned fd $fd w/ state $state for
which we have no mapping. removing.\n";
+ POSIX::close($fd);
+ epoll_ctl($Epoll, EPOLL_CTL_DEL, $fd, 0);
+ }
+ next;
+ }
+
+ DebugLevel >= 1 && $class->DebugMsg("Event: fd=%d (%s), state=%d
\@ %s\n",
+ $ev->[0], ref($pob), $ev->[1],
time);
+
+ $pob->event_read if $state & EPOLLIN && ! $pob->{closed};
+ $pob->event_write if $state & EPOLLOUT && ! $pob->{closed};
+ $pob->event_err if $state & EPOLLERR && ! $pob->{closed};
+ $pob->event_hup if $state & EPOLLHUP && ! $pob->{closed};
+ }
+
+ return unless PostEventLoop();
+ }
+ exit 0;
+}
+
+### The fallback IO::Poll-based event loop. Gets installed as EventLoop if
+### IO::Epoll fails to load.
+sub PollEventLoop {
+ my $class = shift;
+
+ my Danga::Socket $pob;
+
+ while (1) {
+ my $now = time;
+ # Run expired timers
+ while (@Timers && $Timers[0][0] <= $now) {
+ my $to_run = shift(@Timers);
+ $to_run->[1]->($now);
+ }
+
+ # Get next timeout
+ my $timeout = @Timers ? ($Timers[0][0] - $now) : 1;
+
+ # the following sets up @poll as a series of ($poll,$event_mask)
+ # items, then uses IO::Poll::_poll, implemented in XS, which
+ # modifies the array in place with the even elements being
+ # replaced with the event masks that occured.
+ my @poll;
+ foreach my $fd ( keys %OtherFds ) {
+ push @poll, $fd, POLLIN;
+ }
+ foreach my $fd ( keys %DescriptorMap ) {
+ my Danga::Socket $sock = $DescriptorMap{$fd};
+ push @poll, $fd, $sock->{event_watch};
+ }
+ return 0 unless @poll;
+
+ # print STDERR "Poll for $timeout secs\n";
+ my $count = IO::Poll::_poll($timeout * 1000, @poll);
+
+ # Fetch handles with read events
+ while (@poll) {
+ my ($fd, $state) = splice(@poll, 0, 2);
+ next unless $state;
+
+ $pob = $DescriptorMap{$fd};
+
+ if ( !$pob && (my $code = $OtherFds{$fd}) ) {
+ $code->($state);
+ next;
+ }
+
+ $pob->event_read if $state & POLLIN && ! $pob->{closed};
+ $pob->event_write if $state & POLLOUT && ! $pob->{closed};
+ $pob->event_err if $state & POLLERR && ! $pob->{closed};
+ $pob->event_hup if $state & POLLHUP && ! $pob->{closed};
+ }
+
+ return unless PostEventLoop();
+ }
+
+ exit 0;
+}
+
+## PostEventLoop is called at the end of the event loop to process things
+# like close() calls.
+sub PostEventLoop {
+ # fire read events for objects with pushed-back read data
+ my $loop = 1;
+ while ($loop) {
+ $loop = 0;
+ foreach my $fd (keys %PushBackSet) {
+ my Danga::Socket $pob = $PushBackSet{$fd};
+ next unless (! $pob->{closed} &&
+ $pob->{event_watch} & POLLIN);
+ $loop = 1;
+ $pob->event_read;
+ }
+ }
+
+ # now we can close sockets that wanted to close during our event
processing.
+ # (we didn't want to close them during the loop, as we didn't want fd
numbers
+ # being reused and confused during the event loop)
+ foreach my $f (@ToClose) {
+ close($f);
+ }
+ @ToClose = ();
+
+ # now we're at the very end, call per-connection callbacks if defined
+ my $ret = 1; # use $ret so's to not starve some FDs; return 0 if any PLCs
return 0
+ for my $plc (values %PLCMap) {
+ $ret &&= $plc->(\%DescriptorMap, \%OtherFds);
+ }
+
+ # now we're at the very end, call global callback if defined
+ if (defined $PostLoopCallback) {
+ $ret &&= $PostLoopCallback->(\%DescriptorMap, \%OtherFds);
+ }
+ return $ret;
+}
+
+
+### (CLASS) METHOD: DebugMsg( $format, @args )
+### Print the debugging message specified by the C<sprintf>-style I<format> and
+### I<args>
+sub DebugMsg {
+ my ( $class, $fmt, @args ) = @_;
+ chomp $fmt;
+ printf STDERR ">>> $fmt\n", @args;
+}
+
+
+### METHOD: new( $socket )
+### Create a new Danga::Socket object for the given I<socket> which will react
+### to events on it during the C<wait_loop>.
+sub new {
+ my Danga::Socket $self = shift;
+ $self = fields::new($self) unless ref $self;
+
+ my $sock = shift;
+
+ $self->{sock} = $sock;
+ my $fd = fileno($sock);
+ $self->{fd} = $fd;
+ $self->{write_buf} = [];
+ $self->{write_buf_offset} = 0;
+ $self->{write_buf_size} = 0;
+ $self->{closed} = 0;
+ $self->{read_push_back} = [];
+ $self->{post_loop_callback} = undef;
+
+ $self->{event_watch} = POLLERR|POLLHUP|POLLNVAL;
+
+ init_poller();
+
+ if ($HaveEpoll) {
+ epoll_ctl($Epoll, EPOLL_CTL_ADD, $fd, $self->{event_watch})
+ and die "couldn't add epoll watch for $fd\n";
+ }
+ elsif ($HaveKQueue) {
+ # Add them to the queue but disabled for now
+ $KQueue->EV_SET($fd, IO::KQueue::EVFILT_READ(),
+ IO::KQueue::EV_ADD() | IO::KQueue::EV_DISABLE());
+ $KQueue->EV_SET($fd, IO::KQueue::EVFILT_WRITE(),
+ IO::KQueue::EV_ADD() | IO::KQueue::EV_DISABLE());
+ }
+
+ $DescriptorMap{$fd} = $self;
+ return $self;
+}
+
+
+
+#####################################################################
+### I N S T A N C E M E T H O D S
+#####################################################################
+
+### METHOD: tcp_cork( $boolean )
+### Turn TCP_CORK on or off depending on the value of I<boolean>.
+sub tcp_cork {
+ my Danga::Socket $self = shift;
+ my $val = shift;
+
+ # FIXME: Linux-specific.
+ setsockopt($self->{sock}, IPPROTO_TCP, TCP_CORK,
+ pack("l", $val ? 1 : 0)) || die "setsockopt: $!";
+}
+
+### METHOD: close( [$reason] )
+### Close the socket. The I<reason> argument will be used in debugging
messages.
+sub close {
+ my Danga::Socket $self = shift;
+ my $reason = shift || "";
+
+ my $fd = $self->{fd};
+ my $sock = $self->{sock};
+ $self->{closed} = 1;
+
+ # we need to flush our write buffer, as there may
+ # be self-referential closures (sub { $client->close })
+ # preventing the object from being destroyed
+ $self->{write_buf} = [];
+
+ if (DebugLevel) {
+ my ($pkg, $filename, $line) = caller;
+ print STDERR "Closing \#$fd due to $pkg/$filename/$line ($reason)\n";
+ }
+
+ if ($HaveEpoll) {
+ if (epoll_ctl($Epoll, EPOLL_CTL_DEL, $fd, $self->{event_watch}) == 0) {
+ DebugLevel >= 1 && $self->debugmsg("Client %d disconnected.\n",
$fd);
+ } else {
+ DebugLevel >= 1 && $self->debugmsg("poll->remove failed on fd
%d\n", $fd);
+ }
+ }
+
+ delete $PLCMap{$fd};
+ delete $DescriptorMap{$fd};
+ delete $PushBackSet{$fd};
+
+ # defer closing the actual socket until the event loop is done
+ # processing this round of events. (otherwise we might reuse fds)
+ push @ToClose, $sock;
+
+ return 0;
+}
+
+
+
+### METHOD: sock()
+### Returns the underlying IO::Handle for the object.
+sub sock {
+ my Danga::Socket $self = shift;
+ return $self->{sock};
+}
+
+
+### METHOD: write( $data )
+### Write the specified data to the underlying handle. I<data> may be scalar,
+### scalar ref, code ref (to run when there), or undef just to kick-start.
+### Returns 1 if writes all went through, or 0 if there are writes in queue. If
+### it returns 1, caller should stop waiting for 'writable' events)
+sub write {
+ my Danga::Socket $self;
+ my $data;
+ ($self, $data) = @_;
+
+ # nobody should be writing to closed sockets, but caller code can
+ # do two writes within an event, have the first fail and
+ # disconnect the other side (whose destructor then closes the
+ # calling object, but it's still in a method), and then the
+ # now-dead object does its second write. that is this case. we
+ # just lie and say it worked. it'll be dead soon and won't be
+ # hurt by this lie.
+ return 1 if $self->{closed};
+
+ my $bref;
+
+ # just queue data if there's already a wait
+ my $need_queue;
+
+ if (defined $data) {
+ $bref = ref $data ? $data : \$data;
+ if ($self->{write_buf_size}) {
+ push @{$self->{write_buf}}, $bref;
+ $self->{write_buf_size} += ref $bref eq "SCALAR" ? length($$bref)
: 1;
+ return 0;
+ }
+
+ # this flag says we're bypassing the queue system, knowing we're the
+ # only outstanding write, and hoping we don't ever need to use it.
+ # if so later, though, we'll need to queue
+ $need_queue = 1;
+ }
+
+ WRITE:
+ while (1) {
+ return 1 unless $bref ||= $self->{write_buf}[0];
+
+ my $len;
+ eval {
+ $len = length($$bref); # this will die if $bref is a code ref,
caught below
+ };
+ if ($@) {
+ if (ref $bref eq "CODE") {
+ unless ($need_queue) {
+ $self->{write_buf_size}--; # code refs are worth 1
+ shift @{$self->{write_buf}};
+ }
+ $bref->();
+ undef $bref;
+ next WRITE;
+ }
+ die "Write error: $@ <$bref>";
+ }
+
+ my $to_write = $len - $self->{write_buf_offset};
+ my $written = syswrite($self->{sock}, $$bref, $to_write,
$self->{write_buf_offset});
+
+ if (! defined $written) {
+ if ($! == EPIPE) {
+ return $self->close("EPIPE");
+ } elsif ($! == EAGAIN) {
+ # since connection has stuff to write, it should now be
+ # interested in pending writes:
+ if ($need_queue) {
+ push @{$self->{write_buf}}, $bref;
+ $self->{write_buf_size} += $len;
+ }
+ $self->watch_write(1);
+ return 0;
+ } elsif ($! == ECONNRESET) {
+ return $self->close("ECONNRESET");
+ }
+
+ DebugLevel >= 1 && $self->debugmsg("Closing connection ($self) due
to write error: $!\n");
+
+ return $self->close("write_error");
+ } elsif ($written != $to_write) {
+ DebugLevel >= 2 && $self->debugmsg("Wrote PARTIAL %d bytes to %d",
+ $written, $self->{fd});
+ if ($need_queue) {
+ push @{$self->{write_buf}}, $bref;
+ $self->{write_buf_size} += $len;
+ }
+ # since connection has stuff to write, it should now be
+ # interested in pending writes:
+ $self->{write_buf_offset} += $written;
+ $self->{write_buf_size} -= $written;
+ $self->watch_write(1);
+ return 0;
+ } elsif ($written == $to_write) {
+ DebugLevel >= 2 && $self->debugmsg("Wrote ALL %d bytes to %d
(nq=%d)",
+ $written, $self->{fd},
$need_queue);
+ $self->{write_buf_offset} = 0;
+
+ # this was our only write, so we can return immediately
+ # since we avoided incrementing the buffer size or
+ # putting it in the buffer. we also know there
+ # can't be anything else to write.
+ return 1 if $need_queue;
+
+ $self->{write_buf_size} -= $written;
+ shift @{$self->{write_buf}};
+ undef $bref;
+ next WRITE;
+ }
+ }
+}
+
+### METHOD: push_back_read( $buf )
+### Push back I<buf> (a scalar or scalarref) into the read stream
+sub push_back_read {
+ my Danga::Socket $self = shift;
+ my $buf = shift;
+ push @{$self->{read_push_back}}, ref $buf ? $buf : \$buf;
+ $PushBackSet{$self->{fd}} = $self;
+}
+
+### METHOD: shift_back_read( $buf )
+### Shift back I<buf> (a scalar or scalarref) into the read stream
+### Use this instead of push_back_read() when you need to unread
+### something you just read.
+sub shift_back_read {
+ my Danga::Socket $self = shift;
+ my $buf = shift;
+ unshift @{$self->{read_push_back}}, ref $buf ? $buf : \$buf;
+ $PushBackSet{$self->{fd}} = $self;
+}
+
+### METHOD: read( $bytecount )
+### Read at most I<bytecount> bytes from the underlying handle; returns scalar
+### ref on read, or undef on connection closed.
+sub read {
+ my Danga::Socket $self = shift;
+ my $bytes = shift;
+ my $buf;
+ my $sock = $self->{sock};
+
+ if (@{$self->{read_push_back}}) {
+ $buf = shift @{$self->{read_push_back}};
+ my $len = length($$buf);
+ if ($len <= $buf) {
+ unless (@{$self->{read_push_back}}) {
+ delete $PushBackSet{$self->{fd}};
+ }
+ return $buf;
+ } else {
+ # if the pushed back read is too big, we have to split it
+ my $overflow = substr($$buf, $bytes);
+ $buf = substr($$buf, 0, $bytes);
+ unshift @{$self->{read_push_back}}, \$overflow,
+ return \$buf;
+ }
+ }
+
+ my $res = sysread($sock, $buf, $bytes, 0);
+ DebugLevel >= 2 && $self->debugmsg("sysread = %d; \$! = %d", $res, $!);
+
+ if (! $res && $! != EWOULDBLOCK) {
+ # catches 0=conn closed or undef=error
+ DebugLevel >= 2 && $self->debugmsg("Fd \#%d read hit the end of the
road.", $self->{fd});
+ return undef;
+ }
+
+ return \$buf;
+}
+
+
+### (VIRTUAL) METHOD: event_read()
+### Readable event handler. Concrete deriviatives of Danga::Socket should
+### provide an implementation of this. The default implementation will die if
+### called.
+sub event_read { die "Base class event_read called for $_[0]\n"; }
+
+
+### (VIRTUAL) METHOD: event_err()
+### Error event handler. Concrete deriviatives of Danga::Socket should
+### provide an implementation of this. The default implementation will die if
+### called.
+sub event_err { die "Base class event_err called for $_[0]\n"; }
+
+
+### (VIRTUAL) METHOD: event_hup()
+### 'Hangup' event handler. Concrete deriviatives of Danga::Socket should
+### provide an implementation of this. The default implementation will die if
+### called.
+sub event_hup { die "Base class event_hup called for $_[0]\n"; }
+
+
+### METHOD: event_write()
+### Writable event handler. Concrete deriviatives of Danga::Socket may wish to
+### provide an implementation of this. The default implementation calls
+### C<write()> with an C<undef>.
+sub event_write {
+ my $self = shift;
+ $self->write(undef);
+}
+
+
+### METHOD: watch_read( $boolean )
+### Turn 'readable' event notification on or off.
+sub watch_read {
+ my Danga::Socket $self = shift;
+ return if $self->{closed};
+
+ my $val = shift;
+ my $event = $self->{event_watch};
+
+ $event &= ~POLLIN if ! $val;
+ $event |= POLLIN if $val;
+
+ # If it changed, set it
+ if ($event != $self->{event_watch}) {
+ if ($HaveKQueue) {
+ $KQueue->EV_SET($self->{fd}, IO::KQueue::EVFILT_READ(),
+ $val ? IO::KQueue::EV_ENABLE() :
IO::KQueue::EV_DISABLE());
+ }
+ elsif ($HaveEpoll) {
+ epoll_ctl($Epoll, EPOLL_CTL_MOD, $self->{fd}, $event)
+ and print STDERR "couldn't modify epoll settings for
$self->{fd} " .
+ "($self) from $self->{event_watch} -> $event\n";
+ }
+ $self->{event_watch} = $event;
+ }
+}
+
+### METHOD: watch_read( $boolean )
+### Turn 'writable' event notification on or off.
+sub watch_write {
+ my Danga::Socket $self = shift;
+ return if $self->{closed};
+
+ my $val = shift;
+ my $event = $self->{event_watch};
+
+ $event &= ~POLLOUT if ! $val;
+ $event |= POLLOUT if $val;
+
+ # If it changed, set it
+ if ($event != $self->{event_watch}) {
+ if ($HaveKQueue) {
+ $KQueue->EV_SET($self->{fd}, IO::KQueue::EVFILT_WRITE(),
+ $val ? IO::KQueue::EV_ENABLE() :
IO::KQueue::EV_DISABLE());
+ }
+ elsif ($HaveEpoll) {
+ epoll_ctl($Epoll, EPOLL_CTL_MOD, $self->{fd}, $event)
+ and print STDERR "couldn't modify epoll settings for
$self->{fd} " .
+ "($self) from $self->{event_watch} -> $event\n";
+ }
+ $self->{event_watch} = $event;
+ }
+}
+
+
+### METHOD: debugmsg( $format, @args )
+### Print the debugging message specified by the C<sprintf>-style I<format> and
+### I<args> if the object's C<debug_level> is greater than or equal to the
given
+### I<level>.
+sub debugmsg {
+ my ( $self, $fmt, @args ) = @_;
+ confess "Not an object" unless ref $self;
+
+ chomp $fmt;
+ printf STDERR ">>> $fmt\n", @args;
+}
+
+
+### METHOD: peer_ip_string()
+### Returns the string describing the peer's IP
+sub peer_ip_string {
+ my Danga::Socket $self = shift;
+ return $self->{peer_ip} if defined $self->{peer_ip};
+ my $pn = getpeername($self->{sock}) or return undef;
+ my ($port, $iaddr) = Socket::sockaddr_in($pn);
+ my $r = Socket::inet_ntoa($iaddr);
+ $self->{peer_ip} = $r;
+ return $r;
+}
+
+### METHOD: peer_addr_string()
+### Returns the string describing the peer for the socket which underlies this
+### object in form "ip:port"
+sub peer_addr_string {
+ my Danga::Socket $self = shift;
+ my $pn = getpeername($self->{sock}) or return undef;
+ my ($port, $iaddr) = Socket::sockaddr_in($pn);
+ return Socket::inet_ntoa($iaddr) . ":$port";
+}
+
+### METHOD: as_string()
+### Returns a string describing this socket.
+sub as_string {
+ my Danga::Socket $self = shift;
+ my $ret = ref($self) . ": " . ($self->{closed} ? "closed" : "open");
+ my $peer = $self->peer_addr_string;
+ if ($peer) {
+ $ret .= " to " . $self->peer_addr_string;
+ }
+ return $ret;
+}
+
+### CLASS METHOD: SetPostLoopCallback
+### Sets post loop callback function. Pass a subref and it will be
+### called every time the event loop finishes. Return 1 from the sub
+### to make the loop continue, else it will exit. The function will
+### be passed two parameters: \%DescriptorMap, \%OtherFds.
+sub SetPostLoopCallback {
+ my ($class, $ref) = @_;
+ if(ref $class) {
+ my Danga::Socket $self = $class;
+ if( defined $ref && ref $ref eq 'CODE' ) {
+ $PLCMap{$self->{fd}} = $ref;
+ }
+ else {
+ delete $PLCMap{$self->{fd}};
+ }
+ }
+ else {
+ $PostLoopCallback = (defined $ref && ref $ref eq 'CODE') ? $ref :
undef;
+ }
+}
+
+sub DESTROY {
+ my Danga::Socket $self = shift;
+ $self->close() if !$self->{closed};
+}
+
+#####################################################################
+### U T I L I T Y F U N C T I O N S
+#####################################################################
+
+our $SYS_epoll_create = eval { &SYS_epoll_create } || 254; # linux-ix86 default
+
+# epoll_create wrapper
+# ARGS: (size)
+sub epoll_create {
+ my $epfd = eval { syscall($SYS_epoll_create, $_[0]) };
+ return -1 if $@;
+ return $epfd;
+}
+
+# epoll_ctl wrapper
+# ARGS: (epfd, op, fd, events)
+our $SYS_epoll_ctl = eval { &SYS_epoll_ctl } || 255; # linux-ix86 default
+sub epoll_ctl {
+ syscall($SYS_epoll_ctl, $_[0]+0, $_[1]+0, $_[2]+0, pack("LLL", $_[3],
$_[2]));
+}
+
+# epoll_wait wrapper
+# ARGS: (epfd, maxevents, timeout, arrayref)
+# arrayref: values modified to be [$fd, $event]
+our $epoll_wait_events;
+our $epoll_wait_size = 0;
+our $SYS_epoll_wait = eval { &SYS_epoll_wait } || 256; # linux-ix86 default
+sub epoll_wait {
+ # resize our static buffer if requested size is bigger than we've ever done
+ if ($_[1] > $epoll_wait_size) {
+ $epoll_wait_size = $_[1];
+ $epoll_wait_events = pack("LLL") x $epoll_wait_size;
+ }
+ my $ct = syscall($SYS_epoll_wait, $_[0]+0, $epoll_wait_events, $_[1]+0,
$_[2]+0);
+ for ($_ = 0; $_ < $ct; $_++) {
+ @{$_[3]->[$_]}[1,0] = unpack("LL", substr($epoll_wait_events, 12*$_,
8));
+ }
+ return $ct;
+}
+
+
+
+1;
+
+
+# Local Variables:
+# mode: perl
+# c-basic-indent: 4
+# indent-tabs-mode: nil
+# End:
Added: trunk/lib/Danga/TimeoutSocket.pm
==============================================================================
--- (empty file)
+++ trunk/lib/Danga/TimeoutSocket.pm Mon Jul 11 12:11:11 2005
@@ -0,0 +1,62 @@
+# $Id: TimeoutSocket.pm,v 1.2 2005/02/02 20:44:35 msergeant Exp $
+
+package Danga::TimeoutSocket;
+
+use base 'Danga::Socket';
+use fields qw(alive_time create_time);
+
+our $last_cleanup = 0;
+
+Danga::Socket->AddTimer(15, \&_do_cleanup);
+
+sub new {
+ my Danga::TimeoutSocket $self = shift;
+ my $sock = shift;
+ $self = fields::new($self) unless ref($self);
+ $self->SUPER::new($sock);
+
+ my $now = time;
+ $self->{alive_time} = $self->{create_time} = $now;
+
+ return $self;
+}
+
+# overload these in a subclass
+sub max_idle_time { 0 }
+sub max_connect_time { 0 }
+
+sub _do_cleanup {
+ my $now = time;
+
+ Danga::Socket->AddTimer(15, \&_do_cleanup);
+
+ my $sf = __PACKAGE__->get_sock_ref;
+
+ my %max_age; # classname -> max age (0 means forever)
+ my %max_connect; # classname -> max connect time
+ my @to_close;
+ while (my $k = each %$sf) {
+ my Danga::TimeoutSocket $v = $sf->{$k};
+ my $ref = ref $v;
+ next unless $v->isa('Danga::TimeoutSocket');
+ unless (defined $max_age{$ref}) {
+ $max_age{$ref} = $ref->max_idle_time || 0;
+ $max_connect{$ref} = $ref->max_connect_time || 0;
+ }
+ if (my $t = $max_connect{$ref}) {
+ if ($v->{create_time} < $now - $t) {
+ push @to_close, $v;
+ next;
+ }
+ }
+ if (my $t = $max_age{$ref}) {
+ if ($v->{alive_time} < $now - $t) {
+ push @to_close, $v;
+ }
+ }
+ }
+
+ $_->close("Timeout") foreach @to_close;
+}
+
+1;
