1171 lines
37 KiB
Perl
1171 lines
37 KiB
Perl
|
###########################################################################
|
||
|
|
|
||
|
|
=head1 NAME
|
||
|
|
|
||
|
|
Danga::Socket - Event loop and event-driven async socket base class
|
||
|
|
|
||
|
|
=head1 SYNOPSIS
|
||
|
|
|
||
|
|
package My::Socket
|
||
|
|
use Danga::Socket;
|
||
|
|
use base ('Danga::Socket');
|
||
|
|
use fields ('my_attribute');
|
||
|
|
|
||
|
|
sub new {
|
||
|
|
my My::Socket $self = shift;
|
||
|
|
$self = fields::new($self) unless ref $self;
|
||
|
|
$self->SUPER::new( @_ );
|
||
|
|
|
||
|
|
$self->{my_attribute} = 1234;
|
||
|
|
return $self;
|
||
|
|
}
|
||
|
|
|
||
|
|
sub event_err { ... }
|
||
|
|
sub event_hup { ... }
|
||
|
|
sub event_write { ... }
|
||
|
|
sub event_read { ... }
|
||
|
|
sub close { ... }
|
||
|
|
|
||
|
|
$my_sock->tcp_cork($bool);
|
||
|
|
|
||
|
|
# write returns 1 if all writes have gone through, or 0 if there
|
||
|
|
# are writes in queue
|
||
|
|
$my_sock->write($scalar);
|
||
|
|
$my_sock->write($scalarref);
|
||
|
|
$my_sock->write(sub { ... }); # run when previous data written
|
||
|
|
$my_sock->write(undef); # kick-starts
|
||
|
|
|
||
|
|
# read max $bytecount bytes, or undef on connection closed
|
||
|
|
$scalar_ref = $my_sock->read($bytecount);
|
||
|
|
|
||
|
|
# watch for writability. not needed with ->write(). write()
|
||
|
|
# will automatically turn on watch_write when you wrote too much
|
||
|
|
# and turn it off when done
|
||
|
|
$my_sock->watch_write($bool);
|
||
|
|
|
||
|
|
# watch for readability
|
||
|
|
$my_sock->watch_read($bool);
|
||
|
|
|
||
|
|
# if you read too much and want to push some back on
|
||
|
|
# readable queue. (not incredibly well-tested)
|
||
|
|
$my_sock->push_back_read($buf); # scalar or scalar ref
|
||
|
|
|
||
|
|
Danga::Socket->AddOtherFds(..);
|
||
|
|
Danga::Socket->SetLoopTimeout($millisecs);
|
||
|
|
Danga::Socket->DescriptorMap();
|
||
|
|
Danga::Socket->WatchedSockets(); # count of DescriptorMap keys
|
||
|
|
Danga::Socket->SetPostLoopCallback($code);
|
||
|
|
Danga::Socket->EventLoop();
|
||
|
|
|
||
|
|
=head1 DESCRIPTION
|
||
|
|
|
||
|
|
This is an abstract base class for objects backed by a socket which
|
||
|
|
provides the basic framework for event-driven asynchronous IO,
|
||
|
|
designed to be fast. Danga::Socket is both a base class for objects,
|
||
|
|
and an event loop.
|
||
|
|
|
||
|
|
Callers subclass Danga::Socket. Danga::Socket's constructor registers
|
||
|
|
itself with the Danga::Socket event loop, and invokes callbacks on the
|
||
|
|
object for readability, writability, errors, and other conditions.
|
||
|
|
|
||
|
|
Because Danga::Socket uses the "fields" module, your subclasses must
|
||
|
|
too.
|
||
|
|
|
||
|
|
=head1 MORE INFO
|
||
|
|
|
||
|
|
For now, see servers using Danga::Socket for guidance. For example:
|
||
|
|
perlbal, mogilefsd, or ddlockd.
|
||
|
|
|
||
|
|
=head1 AUTHORS
|
||
|
|
|
||
|
|
Brad Fitzpatrick <brad@danga.com> - author
|
||
|
|
|
||
|
|
Michael Granger <ged@danga.com> - docs, testing
|
||
|
|
|
||
|
|
Mark Smith <junior@danga.com> - contributor, heavy user, testing
|
||
|
|
|
||
|
|
Matt Sergeant <matt@sergeant.org> - kqueue support
|
||
|
|
|
||
|
|
=head1 BUGS
|
||
|
|
|
||
|
|
Not documented enough.
|
||
|
|
|
||
|
|
epoll is only used on Linux when the arch is one of x86, x86_64, ia64,
|
||
|
|
ppc, and ppc64. Mail me if you want to use this module with epoll
|
||
|
|
mode on something else. (ideally with a patch)
|
||
|
|
|
||
|
|
=head1 LICENSE
|
||
|
|
|
||
|
|
License is granted to use and distribute this module under the same
|
||
|
|
terms as Perl itself.
|
||
|
|
|
||
|
|
=cut
|
||
|
|
|
||
|
|
###########################################################################
|
||
|
|
|
||
|
|
package Danga::Socket;
|
||
|
|
use strict;
|
||
|
|
use POSIX ();
|
||
|
|
|
||
|
|
my $opt_bsd_resource = eval "use BSD::Resource; 1;";
|
||
|
|
|
||
|
|
use vars qw{$VERSION};
|
||
|
|
$VERSION = "1.43";
|
||
|
|
|
||
|
|
use fields ('sock', # underlying socket
|
||
|
|
'fd', # numeric file descriptor
|
||
|
|
'write_buf', # arrayref of scalars, scalarrefs, or coderefs to write
|
||
|
|
'write_buf_offset', # offset into first array of write_buf to start writing at
|
||
|
|
'write_buf_size', # total length of data in all write_buf items
|
||
|
|
'read_push_back', # arrayref of "pushed-back" read data the application didn't want
|
||
|
|
'closed', # bool: socket is closed
|
||
|
|
'corked', # bool: socket is corked
|
||
|
|
'event_watch', # bitmask of events the client is interested in (POLLIN,OUT,etc.)
|
||
|
|
);
|
||
|
|
|
||
|
|
use Errno qw(EINPROGRESS EWOULDBLOCK EISCONN ENOTSOCK
|
||
|
|
EPIPE EAGAIN EBADF ECONNRESET ENOPROTOOPT);
|
||
|
|
|
||
|
|
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;
|
||
|
|
|
||
|
|
# 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;
|
||
|
|
|
||
|
|
our $HAVE_KQUEUE = eval { require IO::KQueue; 1 };
|
||
|
|
|
||
|
|
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
|
||
|
|
$LoopTimeout, # timeout of event loop in milliseconds
|
||
|
|
$DoProfile, # if on, enable profiling
|
||
|
|
%Profiling, # what => [ utime, stime, calls ]
|
||
|
|
$TryEpoll, # whether epoll should be attempted to be used.
|
||
|
|
$DoneInit, # if we've done the one-time module init yet
|
||
|
|
);
|
||
|
|
|
||
|
|
Reset();
|
||
|
|
|
||
|
|
#####################################################################
|
||
|
|
### C L A S S M E T H O D S
|
||
|
|
#####################################################################
|
||
|
|
|
||
|
|
# (CLASS) method: reset all state
|
||
|
|
sub Reset {
|
||
|
|
%DescriptorMap = ();
|
||
|
|
%PushBackSet = ();
|
||
|
|
@ToClose = ();
|
||
|
|
%OtherFds = ();
|
||
|
|
$PostLoopCallback = undef;
|
||
|
|
$LoopTimeout = -1; # no timeout by default
|
||
|
|
$DoProfile = 0;
|
||
|
|
%Profiling = ();
|
||
|
|
}
|
||
|
|
|
||
|
|
### (CLASS) METHOD: HaveEpoll()
|
||
|
|
### Returns a true value if this class will use IO::Epoll for async IO.
|
||
|
|
sub HaveEpoll { $HaveEpoll };
|
||
|
|
|
||
|
|
### (CLASS) METHOD: WatchedSockets()
|
||
|
|
### Returns the number of file descriptors which are registered with the global
|
||
|
|
### poll object.
|
||
|
|
sub WatchedSockets {
|
||
|
|
return scalar keys %DescriptorMap;
|
||
|
|
}
|
||
|
|
*watched_sockets = *WatchedSockets;
|
||
|
|
|
||
|
|
### (CLASS) METHOD: EnableProfiling()
|
||
|
|
### Turns profiling on, clearing current profiling data.
|
||
|
|
sub EnableProfiling {
|
||
|
|
if ($opt_bsd_resource) {
|
||
|
|
%Profiling = ();
|
||
|
|
$DoProfile = 1;
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
### (CLASS) METHOD: DisableProfiling()
|
||
|
|
### Turns off profiling, but retains data up to this point
|
||
|
|
sub DisableProfiling {
|
||
|
|
$DoProfile = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
### (CLASS) METHOD: ProfilingData()
|
||
|
|
### Returns reference to a hash of data in format above (see %Profiling)
|
||
|
|
sub ProfilingData {
|
||
|
|
return \%Profiling;
|
||
|
|
}
|
||
|
|
|
||
|
|
### (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;
|
||
|
|
}
|
||
|
|
|
||
|
|
### (CLASS) METHOD: AddOtherFds( [%fdmap] )
|
||
|
|
### Add fds to the OtherFds hash for processing.
|
||
|
|
sub AddOtherFds {
|
||
|
|
my $class = shift;
|
||
|
|
%OtherFds = ( %OtherFds, @_ ); # FIXME investigate what happens on dupe fds
|
||
|
|
return wantarray ? %OtherFds : \%OtherFds;
|
||
|
|
}
|
||
|
|
|
||
|
|
### (CLASS) METHOD: SetLoopTimeout( $timeout )
|
||
|
|
### Set the loop timeout for the event loop to some value in milliseconds.
|
||
|
|
sub SetLoopTimeout {
|
||
|
|
return $LoopTimeout = $_[1] + 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
### (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 $DoneInit;
|
||
|
|
$DoneInit = 1;
|
||
|
|
|
||
|
|
if ($HAVE_KQUEUE) {
|
||
|
|
$KQueue = IO::KQueue->new();
|
||
|
|
$HaveKQueue = $KQueue >= 0;
|
||
|
|
if ($HaveKQueue) {
|
||
|
|
*EventLoop = *KQueueEventLoop;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
elsif ($TryEpoll) {
|
||
|
|
$Epoll = eval { epoll_create(1024); };
|
||
|
|
$HaveEpoll = defined $Epoll && $Epoll >= 0;
|
||
|
|
if ($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($class);
|
||
|
|
} elsif ($HaveKQueue) {
|
||
|
|
KQueueEventLoop($class);
|
||
|
|
} else {
|
||
|
|
PollEventLoop($class);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
## profiling-related data/functions
|
||
|
|
our ($Prof_utime0, $Prof_stime0);
|
||
|
|
sub _pre_profile {
|
||
|
|
($Prof_utime0, $Prof_stime0) = getrusage();
|
||
|
|
}
|
||
|
|
|
||
|
|
sub _post_profile {
|
||
|
|
# get post information
|
||
|
|
my ($autime, $astime) = getrusage();
|
||
|
|
|
||
|
|
# calculate differences
|
||
|
|
my $utime = $autime - $Prof_utime0;
|
||
|
|
my $stime = $astime - $Prof_stime0;
|
||
|
|
|
||
|
|
foreach my $k (@_) {
|
||
|
|
$Profiling{$k} ||= [ 0.0, 0.0, 0 ];
|
||
|
|
$Profiling{$k}->[0] += $utime;
|
||
|
|
$Profiling{$k}->[1] += $stime;
|
||
|
|
$Profiling{$k}->[2]++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
### The epoll-based event loop. Gets installed as EventLoop if IO::Epoll loads
|
||
|
|
### okay.
|
||
|
|
sub EpollEventLoop {
|
||
|
|
my $class = shift;
|
||
|
|
|
||
|
|
foreach my $fd ( keys %OtherFds ) {
|
||
|
|
if (epoll_ctl($Epoll, EPOLL_CTL_ADD, $fd, EPOLLIN) == -1) {
|
||
|
|
print STDERR "epoll_ctl(): failure adding fd=$fd; $! (", $!+0, ")\n";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
while (1) {
|
||
|
|
my @events;
|
||
|
|
my $i;
|
||
|
|
my $evcount;
|
||
|
|
# get up to 1000 events, class default timeout value
|
||
|
|
while (($evcount = epoll_wait($Epoll, 1000, $LoopTimeout, \@events)) >= 0) {
|
||
|
|
EVENT:
|
||
|
|
for ($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), $ev->[1], time);
|
||
|
|
|
||
|
|
if ($DoProfile) {
|
||
|
|
my $class = ref $pob;
|
||
|
|
|
||
|
|
# call profiling action on things that need to be done
|
||
|
|
if ($state & EPOLLIN && ! $pob->{closed}) {
|
||
|
|
_pre_profile();
|
||
|
|
$pob->event_read;
|
||
|
|
_post_profile("$class-read");
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($state & EPOLLOUT && ! $pob->{closed}) {
|
||
|
|
_pre_profile();
|
||
|
|
$pob->event_write;
|
||
|
|
_post_profile("$class-write");
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($state & (EPOLLERR|EPOLLHUP)) {
|
||
|
|
if ($state & EPOLLERR && ! $pob->{closed}) {
|
||
|
|
_pre_profile();
|
||
|
|
$pob->event_err;
|
||
|
|
_post_profile("$class-err");
|
||
|
|
}
|
||
|
|
if ($state & EPOLLHUP && ! $pob->{closed}) {
|
||
|
|
_pre_profile();
|
||
|
|
$pob->event_hup;
|
||
|
|
_post_profile("$class-hup");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
next;
|
||
|
|
}
|
||
|
|
|
||
|
|
# standard non-profiling codepat
|
||
|
|
$pob->event_read if $state & EPOLLIN && ! $pob->{closed};
|
||
|
|
$pob->event_write if $state & EPOLLOUT && ! $pob->{closed};
|
||
|
|
if ($state & (EPOLLERR|EPOLLHUP)) {
|
||
|
|
$pob->event_err if $state & EPOLLERR && ! $pob->{closed};
|
||
|
|
$pob->event_hup if $state & EPOLLHUP && ! $pob->{closed};
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return unless PostEventLoop();
|
||
|
|
|
||
|
|
}
|
||
|
|
print STDERR "Event loop ending; restarting.\n";
|
||
|
|
}
|
||
|
|
exit 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
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)
|
||
|
|
$_->close while ($_ = shift @ToClose);
|
||
|
|
|
||
|
|
# now we're at the very end, call callback if defined
|
||
|
|
if (defined $PostLoopCallback) {
|
||
|
|
return $PostLoopCallback->(\%DescriptorMap, \%OtherFds);
|
||
|
|
}
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
### 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 $pob;
|
||
|
|
|
||
|
|
while (1) {
|
||
|
|
# the following sets up @poll as a series of ($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, $fd, POLLIN;
|
||
|
|
}
|
||
|
|
while ( my ($fd, $sock) = each %DescriptorMap ) {
|
||
|
|
push @poll, $fd, $sock->{event_watch};
|
||
|
|
}
|
||
|
|
|
||
|
|
# if nothing to poll, either end immediately (if no timeout)
|
||
|
|
# or just keep calling the callback
|
||
|
|
unless (@poll) {
|
||
|
|
my $timeout = $LoopTimeout > 0 ? $LoopTimeout : 1000;
|
||
|
|
select undef, undef, undef, ($timeout / 1000);
|
||
|
|
return unless PostEventLoop();
|
||
|
|
next;
|
||
|
|
}
|
||
|
|
|
||
|
|
my $count = IO::Poll::_poll($LoopTimeout, @poll);
|
||
|
|
unless ($count) {
|
||
|
|
return unless PostEventLoop();
|
||
|
|
next;
|
||
|
|
}
|
||
|
|
|
||
|
|
# Fetch handles with read events
|
||
|
|
while (@poll) {
|
||
|
|
my ($fd, $state) = splice(@poll, 0, 2);
|
||
|
|
next unless $state;
|
||
|
|
|
||
|
|
$pob = $DescriptorMap{$fd};
|
||
|
|
|
||
|
|
if (!$pob) {
|
||
|
|
if (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;
|
||
|
|
}
|
||
|
|
|
||
|
|
### 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 @ret = $KQueue->kevent($LoopTimeout);
|
||
|
|
if (!@ret) {
|
||
|
|
foreach my $fd ( keys %DescriptorMap ) {
|
||
|
|
my Danga::Socket $sock = $DescriptorMap{$fd};
|
||
|
|
if ($sock->can('ticker')) {
|
||
|
|
$sock->ticker;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
foreach my $kev (@ret) {
|
||
|
|
my ($fd, $filter, $flags, $fflags) = @$kev;
|
||
|
|
my Danga::Socket $pob = $DescriptorMap{$fd};
|
||
|
|
if (!$pob) {
|
||
|
|
if (my $code = $OtherFds{$fd}) {
|
||
|
|
$code->($filter);
|
||
|
|
}
|
||
|
|
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);
|
||
|
|
}
|
||
|
|
|
||
|
|
### (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->{corked} = 0;
|
||
|
|
$self->{read_push_back} = [];
|
||
|
|
|
||
|
|
$self->{event_watch} = POLLERR|POLLHUP|POLLNVAL;
|
||
|
|
|
||
|
|
init_poller();
|
||
|
|
|
||
|
|
if ($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 = $_[0];
|
||
|
|
my $val = $_[1];
|
||
|
|
|
||
|
|
# make sure we have a socket
|
||
|
|
return unless $self->{sock};
|
||
|
|
return if $val == $self->{corked};
|
||
|
|
|
||
|
|
# FIXME: Linux-specific.
|
||
|
|
my $rv = setsockopt($self->{sock}, IPPROTO_TCP, TCP_CORK,
|
||
|
|
pack("l", $val ? 1 : 0));
|
||
|
|
|
||
|
|
# if we failed, close (if we're not already) and warn about the error
|
||
|
|
if ($rv) {
|
||
|
|
$self->{corked} = $val;
|
||
|
|
} else {
|
||
|
|
if ($! == EBADF || $! == ENOTSOCK) {
|
||
|
|
# internal state is probably corrupted; warn and then close if
|
||
|
|
# we're not closed already
|
||
|
|
warn "setsockopt: $!";
|
||
|
|
$self->close('tcp_cork_failed');
|
||
|
|
} elsif ($! == ENOPROTOOPT) {
|
||
|
|
# TCP implementation doesn't support corking, so just ignore it
|
||
|
|
} else {
|
||
|
|
# some other error; we should never hit here, but if we do, die
|
||
|
|
die "setsockopt: $!";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
### METHOD: steal_socket
|
||
|
|
### Basically returns our socket and makes it so that we don't try to close it,
|
||
|
|
### but we do remove it from epoll handlers. THIS CLOSES $self. It is the same
|
||
|
|
### thing as calling close, except it gives you the socket to use.
|
||
|
|
sub steal_socket {
|
||
|
|
my Danga::Socket $self = $_[0];
|
||
|
|
return if $self->{closed};
|
||
|
|
|
||
|
|
# cleanup does most of the work of closing this socket
|
||
|
|
$self->_cleanup();
|
||
|
|
|
||
|
|
# now undef our internal sock and fd structures so we don't use them
|
||
|
|
my $sock = $self->{sock};
|
||
|
|
$self->{sock} = undef;
|
||
|
|
return $sock;
|
||
|
|
}
|
||
|
|
|
||
|
|
### METHOD: close( [$reason] )
|
||
|
|
### Close the socket. The I<reason> argument will be used in debugging messages.
|
||
|
|
sub close {
|
||
|
|
my Danga::Socket $self = $_[0];
|
||
|
|
return if $self->{closed};
|
||
|
|
|
||
|
|
# print out debugging info for this close
|
||
|
|
if (DebugLevel) {
|
||
|
|
my ($pkg, $filename, $line) = caller;
|
||
|
|
my $reason = $_[1] || "";
|
||
|
|
print STDERR "Closing \#$self->{fd} due to $pkg/$filename/$line ($reason)\n";
|
||
|
|
}
|
||
|
|
|
||
|
|
# this does most of the work of closing us
|
||
|
|
$self->_cleanup();
|
||
|
|
|
||
|
|
# defer closing the actual socket until the event loop is done
|
||
|
|
# processing this round of events. (otherwise we might reuse fds)
|
||
|
|
if ($self->{sock}) {
|
||
|
|
push @ToClose, $self->{sock};
|
||
|
|
$self->{sock} = undef;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
### METHOD: _cleanup()
|
||
|
|
### Called by our closers so we can clean internal data structures.
|
||
|
|
sub _cleanup {
|
||
|
|
my Danga::Socket $self = $_[0];
|
||
|
|
|
||
|
|
# we're effectively closed; we have no fd and sock when we leave here
|
||
|
|
$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} = [];
|
||
|
|
|
||
|
|
# uncork so any final data gets sent. only matters if the person closing
|
||
|
|
# us forgot to do it, but we do it to be safe.
|
||
|
|
$self->tcp_cork(0);
|
||
|
|
|
||
|
|
# if we're using epoll, we have to remove this from our epoll fd so we stop getting
|
||
|
|
# notifications about it
|
||
|
|
if ($HaveEpoll && $self->{fd}) {
|
||
|
|
if (epoll_ctl($Epoll, EPOLL_CTL_DEL, $self->{fd}, $self->{event_watch}) != 0) {
|
||
|
|
# dump_error prints a backtrace so we can try to figure out why this happened
|
||
|
|
$self->dump_error("epoll_ctl(): failure deleting fd=$self->{fd} during _cleanup(); $! (" . ($!+0) . ")");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# now delete from mappings. this fd no longer belongs to us, so we don't want
|
||
|
|
# to get alerts for it if it becomes writable/readable/etc.
|
||
|
|
delete $DescriptorMap{$self->{fd}};
|
||
|
|
delete $PushBackSet{$self->{fd}};
|
||
|
|
|
||
|
|
# and finally get rid of our fd so we can't use it anywhere else
|
||
|
|
$self->{fd} = undef;
|
||
|
|
}
|
||
|
|
|
||
|
|
### 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->();
|
||
|
|
|
||
|
|
# code refs are just run and never get reenqueued
|
||
|
|
# (they're one-shot), so turn off the flag indicating the
|
||
|
|
# outstanding data needs queueing.
|
||
|
|
$need_queue = 0;
|
||
|
|
|
||
|
|
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: 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 $self->{closed} || !$self->{sock};
|
||
|
|
|
||
|
|
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 $self->dump_error("couldn't modify epoll settings for $self->{fd} " .
|
||
|
|
"from $self->{event_watch} -> $event: $! (" . ($!+0) . ")");
|
||
|
|
}
|
||
|
|
$self->{event_watch} = $event;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
### METHOD: watch_write( $boolean )
|
||
|
|
### Turn 'writable' event notification on or off.
|
||
|
|
sub watch_write {
|
||
|
|
my Danga::Socket $self = shift;
|
||
|
|
return if $self->{closed} || !$self->{sock};
|
||
|
|
|
||
|
|
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 $self->dump_error("couldn't modify epoll settings for $self->{fd} " .
|
||
|
|
"from $self->{event_watch} -> $event: $! (" . ($!+0) . ")");
|
||
|
|
}
|
||
|
|
$self->{event_watch} = $event;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# METHOD: dump_error( $message )
|
||
|
|
# Prints to STDERR a backtrace with information about this socket and what lead
|
||
|
|
# up to the dump_error call.
|
||
|
|
sub dump_error {
|
||
|
|
my $i = 0;
|
||
|
|
my @list;
|
||
|
|
while (my ($file, $line, $sub) = (caller($i++))[1..3]) {
|
||
|
|
push @list, "\t$file:$line called $sub\n";
|
||
|
|
}
|
||
|
|
|
||
|
|
print STDERR "ERROR: $_[1]\n" .
|
||
|
|
"\t$_[0] = " . $_[0]->as_string . "\n" .
|
||
|
|
join('', @list);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
### 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 undef unless $self->{sock};
|
||
|
|
my $pn = getpeername($self->{sock}) or return undef;
|
||
|
|
my ($port, $iaddr) = Socket::sockaddr_in($pn);
|
||
|
|
return Socket::inet_ntoa($iaddr);
|
||
|
|
}
|
||
|
|
|
||
|
|
### 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;
|
||
|
|
return undef unless $self->{sock};
|
||
|
|
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 $rw = "(" . ($self->{event_watch} & POLLIN ? 'R' : '') .
|
||
|
|
($self->{event_watch} & POLLOUT ? 'W' : '') . ")";
|
||
|
|
my $ret = ref($self) . "$rw: " . ($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) = @_;
|
||
|
|
$PostLoopCallback = (defined $ref && ref $ref eq 'CODE') ? $ref : undef;
|
||
|
|
}
|
||
|
|
|
||
|
|
#####################################################################
|
||
|
|
### U T I L I T Y F U N C T I O N S
|
||
|
|
#####################################################################
|
||
|
|
|
||
|
|
our ($SYS_epoll_create, $SYS_epoll_ctl, $SYS_epoll_wait);
|
||
|
|
|
||
|
|
if ($^O eq "linux") {
|
||
|
|
my ($sysname, $nodename, $release, $version, $machine) = POSIX::uname();
|
||
|
|
|
||
|
|
# whether the machine requires 64-bit numbers to be on 8-byte
|
||
|
|
# boundaries.
|
||
|
|
my $u64_mod_8 = 0;
|
||
|
|
|
||
|
|
if ($machine =~ m/^i[3456]86$/) {
|
||
|
|
$SYS_epoll_create = 254;
|
||
|
|
$SYS_epoll_ctl = 255;
|
||
|
|
$SYS_epoll_wait = 256;
|
||
|
|
} elsif ($machine eq "x86_64") {
|
||
|
|
$SYS_epoll_create = 213;
|
||
|
|
$SYS_epoll_ctl = 233;
|
||
|
|
$SYS_epoll_wait = 232;
|
||
|
|
} elsif ($machine eq "ppc64") {
|
||
|
|
$SYS_epoll_create = 236;
|
||
|
|
$SYS_epoll_ctl = 237;
|
||
|
|
$SYS_epoll_wait = 238;
|
||
|
|
$u64_mod_8 = 1;
|
||
|
|
} elsif ($machine eq "ppc") {
|
||
|
|
$SYS_epoll_create = 236;
|
||
|
|
$SYS_epoll_ctl = 237;
|
||
|
|
$SYS_epoll_wait = 238;
|
||
|
|
$u64_mod_8 = 1;
|
||
|
|
} elsif ($machine eq "ia64") {
|
||
|
|
$SYS_epoll_create = 1243;
|
||
|
|
$SYS_epoll_ctl = 1244;
|
||
|
|
$SYS_epoll_wait = 1245;
|
||
|
|
$u64_mod_8 = 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($u64_mod_8) {
|
||
|
|
*epoll_wait = \&epoll_wait_mod8;
|
||
|
|
*epoll_ctl = \&epoll_ctl_mod8;
|
||
|
|
} else {
|
||
|
|
*epoll_wait = \&epoll_wait_mod4;
|
||
|
|
*epoll_ctl = \&epoll_ctl_mod4;
|
||
|
|
}
|
||
|
|
|
||
|
|
# if syscall numbers have been defined (and this module has been
|
||
|
|
# tested on) the arch above, then try to use it. try means see if
|
||
|
|
# the syscall is implemented. it may well be that this is Linux
|
||
|
|
# 2.4 and we don't even have it available.
|
||
|
|
$TryEpoll = 1 if $SYS_epoll_create;
|
||
|
|
}
|
||
|
|
|
||
|
|
# epoll_create wrapper
|
||
|
|
# ARGS: (size)
|
||
|
|
sub epoll_create {
|
||
|
|
my $epfd = eval { syscall($SYS_epoll_create, $_[0]) };
|
||
|
|
return -1 if $@;
|
||
|
|
return $epfd;
|
||
|
|
}
|
||
|
|
|
||
|
|
# epoll_ctl wrapper
|
||
|
|
# ARGS: (epfd, op, fd, events_mask)
|
||
|
|
sub epoll_ctl_mod4 {
|
||
|
|
syscall($SYS_epoll_ctl, $_[0]+0, $_[1]+0, $_[2]+0, pack("LLL", $_[3], $_[2], 0));
|
||
|
|
}
|
||
|
|
sub epoll_ctl_mod8 {
|
||
|
|
syscall($SYS_epoll_ctl, $_[0]+0, $_[1]+0, $_[2]+0, pack("LLLL", $_[3], 0, $_[2], 0));
|
||
|
|
}
|
||
|
|
|
||
|
|
# epoll_wait wrapper
|
||
|
|
# ARGS: (epfd, maxevents, timeout (milliseconds), arrayref)
|
||
|
|
# arrayref: values modified to be [$fd, $event]
|
||
|
|
our $epoll_wait_events;
|
||
|
|
our $epoll_wait_size = 0;
|
||
|
|
sub epoll_wait_mod4 {
|
||
|
|
# resize our static buffer if requested size is bigger than we've ever done
|
||
|
|
if ($_[1] > $epoll_wait_size) {
|
||
|
|
$epoll_wait_size = $_[1];
|
||
|
|
$epoll_wait_events = "\0" x 12 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 $ct;
|
||
|
|
}
|
||
|
|
|
||
|
|
sub epoll_wait_mod8 {
|
||
|
|
# resize our static buffer if requested size is bigger than we've ever done
|
||
|
|
if ($_[1] > $epoll_wait_size) {
|
||
|
|
$epoll_wait_size = $_[1];
|
||
|
|
$epoll_wait_events = "\0" x 16 x $epoll_wait_size;
|
||
|
|
}
|
||
|
|
my $ct = syscall($SYS_epoll_wait, $_[0]+0, $epoll_wait_events, $_[1]+0, $_[2]+0);
|
||
|
|
for ($_ = 0; $_ < $ct; $_++) {
|
||
|
|
# 16 byte epoll_event structs, with format:
|
||
|
|
# 4 byte mask [idx 1]
|
||
|
|
# 4 byte padding (we put it into idx 2, useless)
|
||
|
|
# 8 byte data (first 4 bytes are fd, into idx 0)
|
||
|
|
@{$_[3]->[$_]}[1,2,0] = unpack("LLL", substr($epoll_wait_events, 16*$_, 12));
|
||
|
|
}
|
||
|
|
return $ct;
|
||
|
|
}
|
||
|
|
|
||
|
|
1;
|
||
|
|
|
||
|
|
|
||
|
|
# Local Variables:
|
||
|
|
# mode: perl
|
||
|
|
# c-basic-indent: 4
|
||
|
|
# indent-tabs-mode: nil
|
||
|
|
# End:
|