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Comparing deliantra/server/lib/cf.pm (file contents):
Revision 1.4 by root, Tue Feb 7 01:03:44 2006 UTC vs.
Revision 1.178 by root, Thu Jan 18 00:06:55 2007 UTC

1	package cf;	1	package cf;
		2
		3	use utf8;
		4	use strict;
2		5
3	use Symbol;	6	use Symbol;
4	use List::Util;	7	use List::Util;
		8	use Storable;
		9	use Opcode;
		10	use Safe;
		11	use Safe::Hole;
5		12
6	use strict;	13	use Coro 3.4 ();
		14	use Coro::Event;
		15	use Coro::Timer;
		16	use Coro::Signal;
		17	use Coro::Semaphore;
		18	use Coro::AIO;
7		19
8	our %COMMAND;	20	use Data::Dumper;
		21	use Digest::MD5;
		22	use Fcntl;
		23	use IO::AIO 2.32 ();
		24	use YAML::Syck ();
		25	use Time::HiRes;
		26
		27	use Event; $Event::Eval = 1; # no idea why this is required, but it is
		28
		29	sub WF_AUTOCANCEL () { 1 } # automatically cancel this watcher on reload
		30
		31	# work around bug in YAML::Syck - bad news for perl6, will it be as broken wrt. unicode?
		32	$YAML::Syck::ImplicitUnicode = 1;
		33
		34	$Coro::main->prio (Coro::PRIO_MAX); # run main coroutine ("the server") with very high priority
		35
		36	our %COMMAND = ();
		37	our %COMMAND_TIME = ();
		38
		39	our @EXTS = (); # list of extension package names
		40	our %EXTCMD = ();
		41	our %EXT_CORO = (); # coroutines bound to extensions
		42	our %EXT_MAP = (); # pluggable maps
		43
9	our @EVENT;	44	our @EVENT;
10	our %PROP_TYPE;	45	our $LIBDIR = datadir . "/ext";
11	our %PROP_IDX;	46
		47	our $TICK = MAX_TIME * 1e-6;
		48	our $TICK_WATCHER;
		49	our $AIO_POLL_WATCHER;
		50	our $WRITE_RUNTIME_WATCHER;
		51	our $NEXT_TICK;
		52	our $NOW;
		53
		54	our %CFG;
		55
		56	our $UPTIME; $UPTIME ||= time;
		57	our $RUNTIME;
		58
		59	our %PLAYER; # all users
		60	our %MAP; # all maps
		61	our $LINK_MAP; # the special {link} map, which is always available
		62	our $RANDOM_MAPS = cf::localdir . "/random";
		63
		64	our $WAIT_FOR_TICK; $WAIT_FOR_TICK ||= new Coro::Signal;
		65	our $WAIT_FOR_TICK_ONE; $WAIT_FOR_TICK_ONE ||= new Coro::Signal;
		66
		67	# used to convert map paths into valid unix filenames by replacing / by ∕
		68	our $PATH_SEP = "∕"; # U+2215, chosen purely for visual reasons
		69
		70	binmode STDOUT;
		71	binmode STDERR;
		72
		73	# read virtual server time, if available
		74	unless ($RUNTIME || !-e cf::localdir . "/runtime") {
		75	open my $fh, "<", cf::localdir . "/runtime"
		76	or die "unable to read runtime file: $!";
		77	$RUNTIME = <$fh> + 0.;
		78	}
		79
		80	mkdir cf::localdir;
		81	mkdir cf::localdir . "/" . cf::playerdir;
		82	mkdir cf::localdir . "/" . cf::tmpdir;
		83	mkdir cf::localdir . "/" . cf::uniquedir;
		84	mkdir $RANDOM_MAPS;
		85
		86	our $EMERGENCY_POSITION;
		87
		88	#############################################################################
		89
		90	=head2 GLOBAL VARIABLES
		91
		92	=over 4
		93
		94	=item $cf::UPTIME
		95
		96	The timestamp of the server start (so not actually an uptime).
		97
		98	=item $cf::RUNTIME
		99
		100	The time this server has run, starts at 0 and is increased by $cf::TICK on
		101	every server tick.
		102
		103	=item $cf::LIBDIR
		104
		105	The perl library directory, where extensions and cf-specific modules can
		106	be found. It will be added to C<@INC> automatically.
		107
		108	=item $cf::NOW
		109
		110	The time of the last (current) server tick.
		111
		112	=item $cf::TICK
		113
		114	The interval between server ticks, in seconds.
		115
		116	=item %cf::CFG
		117
		118	Configuration for the server, loaded from C</etc/crossfire/config>, or
		119	from wherever your confdir points to.
		120
		121	=item $cf::WAIT_FOR_TICK, $cf::WAIT_FOR_TICK_ONE
		122
		123	These are Coro::Signal objects that are C<< ->broadcast >> (WAIT_FOR_TICK)
		124	or C<< ->send >> (WAIT_FOR_TICK_ONE) on after normal server tick
		125	processing has been done. Call C<< ->wait >> on them to maximise the
		126	window of cpu time available, or simply to synchronise to the server tick.
		127
		128	=back
		129
		130	=cut
12		131
13	BEGIN {	132	BEGIN {
14	@EVENT = map lc, @EVENT;
15
16	*CORE::GLOBAL::warn = sub {	133	*CORE::GLOBAL::warn = sub {
17	my $msg = join "", @_;	134	my $msg = join "", @_;
		135	utf8::encode $msg;
		136
18	$msg .= "\n"	137	$msg .= "\n"
19	unless $msg =~ /\n$/;	138	unless $msg =~ /\n$/;
20		139
21	print STDERR "cfperl: $msg";
22	LOG llevError, "cfperl: $msg";	140	LOG llevError, $msg;
23	};	141	};
24	}	142	}
25		143
26	# generate property mutators	144	@safe::cf::global::ISA = @cf::global::ISA = 'cf::attachable';
27	sub prop_gen {	145	@safe::cf::object::ISA = @cf::object::ISA = 'cf::attachable';
28	my ($prefix, $class) = @_;	146	@safe::cf::player::ISA = @cf::player::ISA = 'cf::attachable';
		147	@safe::cf::client::ISA = @cf::client::ISA = 'cf::attachable';
		148	@safe::cf::map::ISA = @cf::map::ISA = 'cf::attachable';
		149	@safe::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object';
29		150
		151	# we bless all objects into (empty) derived classes to force a method lookup
		152	# within the Safe compartment.
		153	for my $pkg (qw(
		154	cf::global cf::attachable
		155	cf::object cf::object::player
		156	cf::client cf::player
		157	cf::arch cf::living
		158	cf::map cf::party cf::region
		159	)) {
30	no strict 'refs';	160	no strict 'refs';
		161	@{"safe::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;
		162	}
31		163
32	for my $prop (keys %PROP_TYPE) {	164	$Event::DIED = sub {
33	$prop =~ /^\Q$prefix\E_(.*$)/ or next;	165	warn "error in event callback: @_";
34	my $sub = lc $1;	166	};
35		167
36	my $type = $PROP_TYPE{$prop};	168	=head2 UTILITY FUNCTIONS
37	my $idx = $PROP_IDX {$prop};
38		169
39	*{"$class\::get_$sub"} = *{"$class\::$sub"} = sub {	170	=over 4
40	$_[0]->get_property ($type, $idx)	171
		172	=item dumpval $ref
		173
		174	=cut
		175
		176	sub dumpval {
		177	eval {
		178	local $SIG{__DIE__};
		179	my $d;
		180	if (1) {
		181	$d = new Data::Dumper([$_[0]], ["*var"]);
		182	$d->Terse(1);
		183	$d->Indent(2);
		184	$d->Quotekeys(0);
		185	$d->Useqq(1);
		186	#$d->Bless(...);
		187	$d->Seen($_[1]) if @_ > 1;
		188	$d = $d->Dump();
41	};	189	}
		190	$d =~ s/([\x00-\x07\x09\x0b\x0c\x0e-\x1f])/sprintf "\\x%02x", ord($1)/ge;
		191	$d
		192	} || "[unable to dump $_[0]: '$@']";
		193	}
42		194
43	*{"$class\::set_$sub"} = sub {	195	use JSON::Syck (); # TODO# replace by JSON::PC once working
44	$_[0]->set_property ($type, $idx, $_[1]);	196
		197	=item $ref = cf::from_json $json
		198
		199	Converts a JSON string into the corresponding perl data structure.
		200
		201	=cut
		202
		203	sub from_json($) {
		204	$JSON::Syck::ImplicitUnicode = 1; # work around JSON::Syck bugs
		205	JSON::Syck::Load $_[0]
		206	}
		207
		208	=item $json = cf::to_json $ref
		209
		210	Converts a perl data structure into its JSON representation.
		211
		212	=cut
		213
		214	sub to_json($) {
		215	$JSON::Syck::ImplicitUnicode = 0; # work around JSON::Syck bugs
		216	JSON::Syck::Dump $_[0]
		217	}
		218
		219	=item cf::lock_wait $string
		220
		221	Wait until the given lock is available. See cf::lock_acquire.
		222
		223	=item my $lock = cf::lock_acquire $string
		224
		225	Wait until the given lock is available and then acquires it and returns
		226	a Coro::guard object. If the guard object gets destroyed (goes out of scope,
		227	for example when the coroutine gets canceled), the lock is automatically
		228	returned.
		229
		230	Lock names should begin with a unique identifier (for example, cf::map::find
		231	uses map_find and cf::map::load uses map_load).
		232
		233	=cut
		234
		235	our %LOCK;
		236
		237	sub lock_wait($) {
		238	my ($key) = @_;
		239
		240	# wait for lock, if any
		241	while ($LOCK{$key}) {
		242	push @{ $LOCK{$key} }, $Coro::current;
		243	Coro::schedule;
		244	}
		245	}
		246
		247	sub lock_acquire($) {
		248	my ($key) = @_;
		249
		250	# wait, to be sure we are not locked
		251	lock_wait $key;
		252
		253	$LOCK{$key} = [];
		254
		255	Coro::guard {
		256	# wake up all waiters, to be on the safe side
		257	$_->ready for @{ delete $LOCK{$key} };
		258	}
		259	}
		260
		261	sub freeze_mainloop {
		262	return unless $TICK_WATCHER->is_active;
		263
		264	my $guard = Coro::guard {
		265	$TICK_WATCHER->start;
		266	$WRITE_RUNTIME_WATCHER->start;
		267	};
		268	$WRITE_RUNTIME_WATCHER->stop;
		269	$TICK_WATCHER->stop;
		270	$guard
		271	}
		272
		273	=item cf::async { BLOCK }
		274
		275	Currently the same as Coro::async_pool, meaning you cannot use
		276	C<on_destroy>, C<join> or other gimmicks on these coroutines. The only
		277	thing you are allowed to do is call C<prio> on it.
		278
		279	=cut
		280
		281	BEGIN { *async = \&Coro::async_pool }
		282
		283	=item cf::sync_job { BLOCK }
		284
		285	The design of crossfire+ requires that the main coro ($Coro::main) is
		286	always able to handle events or runnable, as crossfire+ is only partly
		287	reentrant. Thus "blocking" it by e.g. waiting for I/O is not acceptable.
		288
		289	If it must be done, put the blocking parts into C<sync_job>. This will run
		290	the given BLOCK in another coroutine while waiting for the result. The
		291	server will be frozen during this time, so the block should either finish
		292	fast or be very important.
		293
		294	=cut
		295
		296	sub sync_job(&) {
		297	my ($job) = @_;
		298
		299	if ($Coro::current == $Coro::main) {
		300	# this is the main coro, too bad, we have to block
		301	# till the operation succeeds, freezing the server :/
		302
		303	# TODO: use suspend/resume instead
		304	# (but this is cancel-safe)
		305	my $freeze_guard = freeze_mainloop;
		306
		307	my $busy = 1;
		308	my @res;
		309
		310	(async {
		311	@res = eval { $job->() };
		312	warn $@ if $@;
		313	undef $busy;
		314	})->prio (Coro::PRIO_MAX);
		315
		316	while ($busy) {
		317	Coro::cede or Event::one_event;
45	};	318	}
		319
		320	wantarray ? @res : $res[0]
		321	} else {
		322	# we are in another coroutine, how wonderful, everything just works
		323
		324	$job->()
		325	}
		326	}
		327
		328	=item $coro = cf::async_ext { BLOCK }
		329
		330	Like async, but this coro is automatically being canceled when the
		331	extension calling this is being unloaded.
		332
		333	=cut
		334
		335	sub async_ext(&) {
		336	my $cb = shift;
		337
		338	my $coro = &Coro::async ($cb);
		339
		340	$coro->on_destroy (sub {
		341	delete $EXT_CORO{$coro+0};
46	}	342	});
47	}	343	$EXT_CORO{$coro+0} = $coro;
48		344
49	# auto-generate most of the API	345	$coro
		346	}
50		347
51	prop_gen OBJECT_PROP => "cf::object";	348	sub write_runtime {
52	# CFAPI_OBJECT_ANIMATION?	349	my $runtime = cf::localdir . "/runtime";
53	prop_gen PLAYER_PROP => "cf::object::player";
54		350
55	prop_gen MAP_PROP => "cf::map";	351	my $fh = aio_open "$runtime~", O_WRONLY | O_CREAT, 0644
56	prop_gen ARCH_PROP => "cf::arch";
57
58	# guessed hierarchies
59
60	@cf::object::player::ISA = 'cf::object';
61	@cf::object::map::ISA = 'cf::object';
62
63	my @exts;
64	my @hook;
65	my %command;
66
67	sub inject_event {
68	my ($data) = @_;
69
70	my $cb = $hook[$data->{event_code}]
71	or return;	352	or return;
72		353
73	$_->($data) for values %$cb;	354	my $value = $cf::RUNTIME + 1 + 10; # 10 is the runtime save interval, for a monotonic clock
		355	(aio_write $fh, 0, (length $value), $value, 0) <= 0
		356	and return;
74		357
75	()	358	aio_fsync $fh
76	}	359	and return;
77		360
78	sub inject_command {	361	close $fh
79	my ($name, $obj, $params) = @_;	362	or return;
80		363
81	for my $cmd (@{ $command{$name} }) {	364	aio_rename "$runtime~", $runtime
82	$cmd->[1]->($obj, $params);	365	and return;
83	}
84		366
85	-1	367	1
86	}	368	}
		369
		370	=back
		371
		372	=cut
		373
		374	#############################################################################
		375
		376	=head2 ATTACHABLE OBJECTS
		377
		378	Many objects in crossfire are so-called attachable objects. That means you can
		379	attach callbacks/event handlers (a collection of which is called an "attachment")
		380	to it. All such attachable objects support the following methods.
		381
		382	In the following description, CLASS can be any of C<global>, C<object>
		383	C<player>, C<client> or C<map> (i.e. the attachable objects in
		384	crossfire+).
		385
		386	=over 4
		387
		388	=item $attachable->attach ($attachment, key => $value...)
		389
		390	=item $attachable->detach ($attachment)
		391
		392	Attach/detach a pre-registered attachment to a specific object and give it
		393	the specified key/value pairs as arguments.
		394
		395	Example, attach a minesweeper attachment to the given object, making it a
		396	10x10 minesweeper game:
		397
		398	$obj->attach (minesweeper => width => 10, height => 10);
		399
		400	=item $bool = $attachable->attached ($name)
		401
		402	Checks wether the named attachment is currently attached to the object.
		403
		404	=item cf::CLASS->attach ...
		405
		406	=item cf::CLASS->detach ...
		407
		408	Define an anonymous attachment and attach it to all objects of the given
		409	CLASS. See the next function for an explanation of its arguments.
		410
		411	You can attach to global events by using the C<cf::global> class.
		412
		413	Example, log all player logins:
		414
		415	cf::player->attach (
		416	on_login => sub {
		417	my ($pl) = @_;
		418	...
		419	},
		420	);
		421
		422	Example, attach to the jeweler skill:
		423
		424	cf::object->attach (
		425	type => cf::SKILL,
		426	subtype => cf::SK_JEWELER,
		427	on_use_skill => sub {
		428	my ($sk, $ob, $part, $dir, $msg) = @_;
		429	...
		430	},
		431	);
		432
		433	=item cf::CLASS::attachment $name, ...
		434
		435	Register an attachment by C<$name> through which attachable objects of the
		436	given CLASS can refer to this attachment.
		437
		438	Some classes such as crossfire maps and objects can specify attachments
		439	that are attached at load/instantiate time, thus the need for a name.
		440
		441	These calls expect any number of the following handler/hook descriptions:
		442
		443	=over 4
		444
		445	=item prio => $number
		446
		447	Set the priority for all following handlers/hooks (unless overwritten
		448	by another C<prio> setting). Lower priority handlers get executed
		449	earlier. The default priority is C<0>, and many built-in handlers are
		450	registered at priority C<-1000>, so lower priorities should not be used
		451	unless you know what you are doing.
		452
		453	=item type => $type
		454
		455	(Only for C<< cf::object->attach >> calls), limits the attachment to the
		456	given type of objects only (the additional parameter C<subtype> can be
		457	used to further limit to the given subtype).
		458
		459	=item on_I<event> => \&cb
		460
		461	Call the given code reference whenever the named event happens (event is
		462	something like C<instantiate>, C<apply>, C<use_skill> and so on, and which
		463	handlers are recognised generally depends on the type of object these
		464	handlers attach to).
		465
		466	See F<include/eventinc.h> for the full list of events supported, and their
		467	class.
		468
		469	=item package => package::
		470
		471	Look for sub functions of the name C<< on_I<event> >> in the given
		472	package and register them. Only handlers for eevents supported by the
		473	object/class are recognised.
		474
		475	=back
		476
		477	Example, define an attachment called "sockpuppet" that calls the given
		478	event handler when a monster attacks:
		479
		480	cf::object::attachment sockpuppet =>
		481	on_skill_attack => sub {
		482	my ($self, $victim) = @_;
		483	...
		484	}
		485	}
		486
		487	=item $attachable->valid
		488
		489	Just because you have a perl object does not mean that the corresponding
		490	C-level object still exists. If you try to access an object that has no
		491	valid C counterpart anymore you get an exception at runtime. This method
		492	can be used to test for existence of the C object part without causing an
		493	exception.
		494
		495	=cut
		496
		497	# the following variables are defined in .xs and must not be re-created
		498	our @CB_GLOBAL = (); # registry for all global events
		499	our @CB_ATTACHABLE = (); # registry for all attachables
		500	our @CB_OBJECT = (); # all objects (should not be used except in emergency)
		501	our @CB_PLAYER = ();
		502	our @CB_CLIENT = ();
		503	our @CB_TYPE = (); # registry for type (cf-object class) based events
		504	our @CB_MAP = ();
		505
		506	my %attachment;
		507
		508	sub cf::attachable::thawer_merge {
		509	# simply override everything except _meta
		510	local $_[0]{_meta};
		511	%{$_[0]} = %{$_[1]};
		512	}
		513
		514	sub _attach_cb($$$$) {
		515	my ($registry, $event, $prio, $cb) = @_;
		516
		517	use sort 'stable';
		518
		519	$cb = [$prio, $cb];
		520
		521	@{$registry->[$event]} = sort
		522	{ $a->[0] cmp $b->[0] }
		523	@{$registry->[$event] || []}, $cb;
		524	}
		525
		526	# hack
		527	my %attachable_klass = map +($_ => 1), KLASS_OBJECT, KLASS_CLIENT, KLASS_PLAYER, KLASS_MAP;
		528
		529	# attach handles attaching event callbacks
		530	# the only thing the caller has to do is pass the correct
		531	# registry (== where the callback attaches to).
		532	sub _attach {
		533	my ($registry, $klass, @arg) = @_;
		534
		535	my $object_type;
		536	my $prio = 0;
		537	my %cb_id = map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == $klass, 0 .. $#EVENT;
		538
		539	#TODO: get rid of this hack
		540	if ($attachable_klass{$klass}) {
		541	%cb_id = (%cb_id, map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == KLASS_ATTACHABLE, 0 .. $#EVENT);
		542	}
		543
		544	while (@arg) {
		545	my $type = shift @arg;
		546
		547	if ($type eq "prio") {
		548	$prio = shift @arg;
		549
		550	} elsif ($type eq "type") {
		551	$object_type = shift @arg;
		552	$registry = $CB_TYPE[$object_type] ||= [];
		553
		554	} elsif ($type eq "subtype") {
		555	defined $object_type or Carp::croak "subtype specified without type";
		556	my $object_subtype = shift @arg;
		557	$registry = $CB_TYPE[$object_type + $object_subtype * NUM_SUBTYPES] ||= [];
		558
		559	} elsif ($type eq "package") {
		560	my $pkg = shift @arg;
		561
		562	while (my ($name, $id) = each %cb_id) {
		563	if (my $cb = $pkg->can ($name)) {
		564	_attach_cb $registry, $id, $prio, $cb;
		565	}
		566	}
		567
		568	} elsif (exists $cb_id{$type}) {
		569	_attach_cb $registry, $cb_id{$type}, $prio, shift @arg;
		570
		571	} elsif (ref $type) {
		572	warn "attaching objects not supported, ignoring.\n";
		573
		574	} else {
		575	shift @arg;
		576	warn "attach argument '$type' not supported, ignoring.\n";
		577	}
		578	}
		579	}
		580
		581	sub _object_attach {
		582	my ($obj, $name, %arg) = @_;
		583
		584	return if exists $obj->{_attachment}{$name};
		585
		586	if (my $attach = $attachment{$name}) {
		587	my $registry = $obj->registry;
		588
		589	for (@$attach) {
		590	my ($klass, @attach) = @$_;
		591	_attach $registry, $klass, @attach;
		592	}
		593
		594	$obj->{$name} = \%arg;
		595	} else {
		596	warn "object uses attachment '$name' that is not available, postponing.\n";
		597	}
		598
		599	$obj->{_attachment}{$name} = undef;
		600	}
		601
		602	sub cf::attachable::attach {
		603	if (ref $_[0]) {
		604	_object_attach @_;
		605	} else {
		606	_attach shift->_attach_registry, @_;
		607	}
		608	};
		609
		610	# all those should be optimised
		611	sub cf::attachable::detach {
		612	my ($obj, $name) = @_;
		613
		614	if (ref $obj) {
		615	delete $obj->{_attachment}{$name};
		616	reattach ($obj);
		617	} else {
		618	Carp::croak "cannot, currently, detach class attachments";
		619	}
		620	};
		621
		622	sub cf::attachable::attached {
		623	my ($obj, $name) = @_;
		624
		625	exists $obj->{_attachment}{$name}
		626	}
		627
		628	for my $klass (qw(ATTACHABLE GLOBAL OBJECT PLAYER CLIENT MAP)) {
		629	eval "#line " . __LINE__ . " 'cf.pm'
		630	sub cf::\L$klass\E::_attach_registry {
		631	(\\\@CB_$klass, KLASS_$klass)
		632	}
		633
		634	sub cf::\L$klass\E::attachment {
		635	my \$name = shift;
		636
		637	\$attachment{\$name} = [[KLASS_$klass, \@_]];
		638	}
		639	";
		640	die if $@;
		641	}
		642
		643	our $override;
		644	our @invoke_results = (); # referenced from .xs code. TODO: play tricks with reify and mortals?
		645
		646	sub override {
		647	$override = 1;
		648	@invoke_results = ();
		649	}
		650
		651	sub do_invoke {
		652	my $event = shift;
		653	my $callbacks = shift;
		654
		655	@invoke_results = ();
		656
		657	local $override;
		658
		659	for (@$callbacks) {
		660	eval { &{$_->[1]} };
		661
		662	if ($@) {
		663	warn "$@";
		664	warn "... while processing $EVENT[$event][0](@_) event, skipping processing altogether.\n";
		665	override;
		666	}
		667
		668	return 1 if $override;
		669	}
		670
		671	0
		672	}
		673
		674	=item $bool = cf::global::invoke (EVENT_CLASS_XXX, ...)
		675
		676	=item $bool = $attachable->invoke (EVENT_CLASS_XXX, ...)
		677
		678	Generate an object-specific event with the given arguments.
		679
		680	This API is preliminary (most likely, the EVENT_CLASS_xxx prefix will be
		681	removed in future versions), and there is no public API to access override
		682	results (if you must, access C<@cf::invoke_results> directly).
		683
		684	=back
		685
		686	=cut
		687
		688	#############################################################################
		689	# object support
		690
		691	sub reattach {
		692	# basically do the same as instantiate, without calling instantiate
		693	my ($obj) = @_;
		694
		695	bless $obj, ref $obj; # re-bless in case extensions have been reloaded
		696
		697	my $registry = $obj->registry;
		698
		699	@$registry = ();
		700
		701	delete $obj->{_attachment} unless scalar keys %{ $obj->{_attachment} || {} };
		702
		703	for my $name (keys %{ $obj->{_attachment} || {} }) {
		704	if (my $attach = $attachment{$name}) {
		705	for (@$attach) {
		706	my ($klass, @attach) = @$_;
		707	_attach $registry, $klass, @attach;
		708	}
		709	} else {
		710	warn "object uses attachment '$name' that is not available, postponing.\n";
		711	}
		712	}
		713	}
		714
		715	cf::attachable->attach (
		716	prio => -1000000,
		717	on_instantiate => sub {
		718	my ($obj, $data) = @_;
		719
		720	$data = from_json $data;
		721
		722	for (@$data) {
		723	my ($name, $args) = @$_;
		724
		725	$obj->attach ($name, %{$args || {} });
		726	}
		727	},
		728	on_reattach => \&reattach,
		729	on_clone => sub {
		730	my ($src, $dst) = @_;
		731
		732	@{$dst->registry} = @{$src->registry};
		733
		734	%$dst = %$src;
		735
		736	%{$dst->{_attachment}} = %{$src->{_attachment}}
		737	if exists $src->{_attachment};
		738	},
		739	);
		740
		741	sub object_freezer_save {
		742	my ($filename, $rdata, $objs) = @_;
		743
		744	sync_job {
		745	if (length $$rdata) {
		746	warn sprintf "saving %s (%d,%d)\n",
		747	$filename, length $$rdata, scalar @$objs;
		748
		749	if (my $fh = aio_open "$filename~", O_WRONLY | O_CREAT, 0600) {
		750	chmod SAVE_MODE, $fh;
		751	aio_write $fh, 0, (length $$rdata), $$rdata, 0;
		752	aio_fsync $fh;
		753	close $fh;
		754
		755	if (@$objs) {
		756	if (my $fh = aio_open "$filename.pst~", O_WRONLY | O_CREAT, 0600) {
		757	chmod SAVE_MODE, $fh;
		758	my $data = Storable::nfreeze { version => 1, objs => $objs };
		759	aio_write $fh, 0, (length $data), $data, 0;
		760	aio_fsync $fh;
		761	close $fh;
		762	aio_rename "$filename.pst~", "$filename.pst";
		763	}
		764	} else {
		765	aio_unlink "$filename.pst";
		766	}
		767
		768	aio_rename "$filename~", $filename;
		769	} else {
		770	warn "FATAL: $filename~: $!\n";
		771	}
		772	} else {
		773	aio_unlink $filename;
		774	aio_unlink "$filename.pst";
		775	}
		776	}
		777	}
		778
		779	sub object_freezer_as_string {
		780	my ($rdata, $objs) = @_;
		781
		782	use Data::Dumper;
		783
		784	$$rdata . Dumper $objs
		785	}
		786
		787	sub object_thawer_load {
		788	my ($filename) = @_;
		789
		790	my ($data, $av);
		791
		792	(aio_load $filename, $data) >= 0
		793	or return;
		794
		795	unless (aio_stat "$filename.pst") {
		796	(aio_load "$filename.pst", $av) >= 0
		797	or return;
		798	$av = eval { (Storable::thaw $av)->{objs} };
		799	}
		800
		801	warn sprintf "loading %s (%d)\n",
		802	$filename, length $data, scalar @{$av || []};#d#
		803	return ($data, $av);
		804	}
		805
		806	#############################################################################
		807	# command handling &c
		808
		809	=item cf::register_command $name => \&callback($ob,$args);
		810
		811	Register a callback for execution when the client sends the user command
		812	$name.
		813
		814	=cut
87		815
88	sub register_command {	816	sub register_command {
89	my ($name, $time, $cb) = @_;	817	my ($name, $cb) = @_;
90		818
91	my $caller = caller;	819	my $caller = caller;
92
93	warn "registering command '$name/$time' to '$caller'";	820	#warn "registering command '$name/$time' to '$caller'";
94		821
95	push @{ $command{$name} }, [$time, $cb, $caller];	822	push @{ $COMMAND{$name} }, [$caller, $cb];
96	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @{ $command{$name} };
97	}	823	}
		824
		825	=item cf::register_extcmd $name => \&callback($pl,$packet);
		826
		827	Register a callbackf ro execution when the client sends an extcmd packet.
		828
		829	If the callback returns something, it is sent back as if reply was being
		830	called.
		831
		832	=cut
		833
		834	sub register_extcmd {
		835	my ($name, $cb) = @_;
		836
		837	$EXTCMD{$name} = $cb;
		838	}
		839
		840	cf::player->attach (
		841	on_command => sub {
		842	my ($pl, $name, $params) = @_;
		843
		844	my $cb = $COMMAND{$name}
		845	or return;
		846
		847	for my $cmd (@$cb) {
		848	$cmd->[1]->($pl->ob, $params);
		849	}
		850
		851	cf::override;
		852	},
		853	on_extcmd => sub {
		854	my ($pl, $buf) = @_;
		855
		856	my $msg = eval { from_json $buf };
		857
		858	if (ref $msg) {
		859	if (my $cb = $EXTCMD{$msg->{msgtype}}) {
		860	if (my %reply = $cb->($pl, $msg)) {
		861	$pl->ext_reply ($msg->{msgid}, %reply);
		862	}
		863	}
		864	} else {
		865	warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";
		866	}
		867
		868	cf::override;
		869	},
		870	);
98		871
99	sub load_extension {	872	sub load_extension {
100	my ($path) = @_;	873	my ($path) = @_;
101		874
102	$path =~ /([^\/\\]+)\.ext$/ or die "$path";	875	$path =~ /([^\/\\]+)\.ext$/ or die "$path";
		876	my $base = $1;
103	my $pkg = $1;	877	my $pkg = $1;
104	$pkg =~ s/[^[:word:]]/_/g;	878	$pkg =~ s/[^[:word:]]/_/g;
105	$pkg = "cf::ext::$pkg";	879	$pkg = "ext::$pkg";
106		880
107	warn "loading '$path' into '$pkg'\n";	881	warn "... loading '$path' into '$pkg'\n";
108		882
109	open my $fh, "<:utf8", $path	883	open my $fh, "<:utf8", $path
110	or die "$path: $!";	884	or die "$path: $!";
111		885
112	my $source =	886	my $source =
113	"package $pkg; use strict; use utf8;\n"	887	"package $pkg; use strict; use utf8;\n"
114	. "#line 1 \"$path\"\n{\n"	888	. "#line 1 \"$path\"\n{\n"
115	. (do { local $/; <$fh> })	889	. (do { local $/; <$fh> })
116	. "\n};\n1";	890	. "\n};\n1";
117		891
118	eval $source	892	unless (eval $source) {
119	or die "$path: $@";	893	my $msg = $@ ? "$path: $@\n"
		894	: "extension disabled.\n";
		895	if ($source =~ /^#!.*perl.*#.*MANDATORY/m) { # ugly match
		896	warn $@;
		897	warn "mandatory extension failed to load, exiting.\n";
		898	exit 1;
		899	}
		900	die $@;
		901	}
120		902
121	push @exts, $pkg;	903	push @EXTS, $pkg;
122
123	no strict 'refs';
124
125	# @{"$pkg\::ISA"} = cf::ext::;
126
127	for my $idx (0 .. $#EVENT) {
128	if (my $ref = $pkg->can ("on_$EVENT[$idx]")) {
129	warn "registering $EVENT[$idx] hook\n";
130	$hook[$idx]{$pkg} = $ref;
131	}
132	}
133	}
134
135	sub unload_extension {
136	my ($pkg) = @_;
137
138	warn "removing extension $pkg\n";
139
140	# remove hooks
141	for my $idx (0 .. $#EVENT) {
142	delete $hook[$idx]{$pkg};
143	}
144
145	# remove commands
146	for my $name (keys %command) {
147	my @cb = grep $_->[2] ne $pkg, @{ $command{$name} };
148
149	if (@cb) {
150	$command{$name} = \@cb;
151	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @cb;
152	} else {
153	delete $command{$name};
154	delete $COMMAND{"$name\000"};
155	}
156	}
157
158	Symbol::delete_package $pkg;
159	}	904	}
160		905
161	sub load_extensions {	906	sub load_extensions {
162	my $LIBDIR = maps_directory "perl";
163
164	for my $ext (<$LIBDIR/*.ext>) {	907	for my $ext (<$LIBDIR/*.ext>) {
165	next unless -r $ext;	908	next unless -r $ext;
166	eval {	909	eval {
167	load_extension $ext;	910	load_extension $ext;
168	1	911	1
169	} or warn "$ext not loaded: $@";	912	} or warn "$ext not loaded: $@";
170	}	913	}
171	}	914	}
172		915
173	register_command "perl-reload", 0, sub {	916	#############################################################################
		917
		918	=head2 CORE EXTENSIONS
		919
		920	Functions and methods that extend core crossfire objects.
		921
		922	=cut
		923
		924	package cf::player;
		925
		926	use Coro::AIO;
		927
		928	=head3 cf::player
		929
		930	=over 4
		931
		932	=item cf::player::find $login
		933
		934	Returns the given player object, loading it if necessary (might block).
		935
		936	=cut
		937
		938	sub playerdir($) {
		939	cf::localdir
		940	. "/"
		941	. cf::playerdir
		942	. "/"
		943	. (ref $_[0] ? $_[0]->ob->name : $_[0])
		944	}
		945
		946	sub path($) {
		947	my $login = ref $_[0] ? $_[0]->ob->name : $_[0];
		948
		949	(playerdir $login) . "/$login.pl"
		950	}
		951
		952	sub find_active($) {
		953	$cf::PLAYER{$_[0]}
		954	and $cf::PLAYER{$_[0]}->active
		955	and $cf::PLAYER{$_[0]}
		956	}
		957
		958	sub exists($) {
		959	my ($login) = @_;
		960
		961	$cf::PLAYER{$login}
		962	or cf::sync_job { !aio_stat $login }
		963	}
		964
		965	sub find($) {
		966	return $cf::PLAYER{$_[0]} || do {
		967	my $login = $_[0];
		968
		969	my $guard = cf::lock_acquire "user_find:$login";
		970
		971	$cf::PLAYER{$_[0]} || do {
		972	my $pl = load_pl path $login
		973	or return;
		974	$cf::PLAYER{$login} = $pl
		975	}
		976	}
		977	}
		978
		979	sub save($) {
		980	my ($pl) = @_;
		981
		982	return if $pl->{deny_save};
		983
		984	my $path = path $pl;
		985	my $guard = cf::lock_acquire "user_save:$path";
		986
		987	return if $pl->{deny_save};
		988
		989	aio_mkdir playerdir $pl, 0770;
		990	$pl->{last_save} = $cf::RUNTIME;
		991
		992	$pl->save_pl ($path);
		993	Coro::cede;
		994	}
		995
		996	sub new($) {
		997	my ($login) = @_;
		998
		999	my $self = create;
		1000
		1001	$self->ob->name ($login);
		1002	$self->{deny_save} = 1;
		1003
		1004	$cf::PLAYER{$login} = $self;
		1005
		1006	$self
		1007	}
		1008
		1009	=item $pl->quit_character
		1010
		1011	Nukes the player without looking back. If logged in, the connection will
		1012	be destroyed. May block for a long time.
		1013
		1014	=cut
		1015
		1016	sub quit_character {
		1017	my ($pl) = @_;
		1018
		1019	$pl->{deny_save} = 1;
		1020	$pl->password ("*"); # this should lock out the player until we nuked the dir
		1021
		1022	$pl->invoke (cf::EVENT_PLAYER_LOGOUT, 1) if $pl->active;
		1023	$pl->deactivate;
		1024	$pl->invoke (cf::EVENT_PLAYER_QUIT);
		1025	$pl->ns->destroy if $pl->ns;
		1026
		1027	my $path = playerdir $pl;
		1028	my $temp = "$path~$cf::RUNTIME~deleting~";
		1029	aio_rename $path, $temp;
		1030	delete $cf::PLAYER{$pl->ob->name};
		1031	$pl->destroy;
		1032	IO::AIO::aio_rmtree $temp;
		1033	}
		1034
		1035	=item cf::player::list_logins
		1036
		1037	Returns am arrayref of all valid playernames in the system, can take a
		1038	while and may block, so not sync_job-capable, ever.
		1039
		1040	=cut
		1041
		1042	sub list_logins {
		1043	my $dirs = aio_readdir cf::localdir . "/" . cf::playerdir
		1044	or return [];
		1045
		1046	my @logins;
		1047
		1048	for my $login (@$dirs) {
		1049	my $fh = aio_open path $login, Fcntl::O_RDONLY, 0 or next;
		1050	aio_read $fh, 0, 512, my $buf, 0 or next;
		1051	$buf !~ /^password -------------$/m or next; # official not-valid tag
		1052
		1053	utf8::decode $login;
		1054	push @logins, $login;
		1055	}
		1056
		1057	\@logins
		1058	}
		1059
		1060	=item $player->maps
		1061
		1062	Returns an arrayref of map paths that are private for this
		1063	player. May block.
		1064
		1065	=cut
		1066
		1067	sub maps($) {
		1068	my ($pl) = @_;
		1069
		1070	my $files = aio_readdir playerdir $pl
		1071	or return;
		1072
		1073	my @paths;
		1074
		1075	for (@$files) {
		1076	utf8::decode $_;
		1077	next if /\.(?:pl|pst)$/;
		1078	next unless /^$PATH_SEP/o;
		1079
		1080	s/\.map$//;
		1081	push @paths, "~" . $pl->ob->name . "/" . $_;
		1082	}
		1083
		1084	\@paths
		1085	}
		1086
		1087	=item $player->ext_reply ($msgid, $msgtype, %msg)
		1088
		1089	Sends an ext reply to the player.
		1090
		1091	=cut
		1092
		1093	sub ext_reply($$$%) {
		1094	my ($self, $id, %msg) = @_;
		1095
		1096	$msg{msgid} = $id;
		1097
		1098	$self->send ("ext " . cf::to_json \%msg);
		1099	}
		1100
		1101	package cf;
		1102
		1103	=back
		1104
		1105
		1106	=head3 cf::map
		1107
		1108	=over 4
		1109
		1110	=cut
		1111
		1112	package cf::map;
		1113
		1114	use Fcntl;
		1115	use Coro::AIO;
		1116
		1117	use overload
		1118	'""' => \&as_string,
		1119	fallback => 1;
		1120
		1121	our $MAX_RESET = 3600;
		1122	our $DEFAULT_RESET = 3000;
		1123
		1124	sub generate_random_map {
		1125	my ($self, $rmp) = @_;
		1126	# mit "rum" bekleckern, nicht
		1127	$self->_create_random_map (
		1128	$rmp->{wallstyle}, $rmp->{wall_name}, $rmp->{floorstyle}, $rmp->{monsterstyle},
		1129	$rmp->{treasurestyle}, $rmp->{layoutstyle}, $rmp->{doorstyle}, $rmp->{decorstyle},
		1130	$rmp->{origin_map}, $rmp->{final_map}, $rmp->{exitstyle}, $rmp->{this_map},
		1131	$rmp->{exit_on_final_map},
		1132	$rmp->{xsize}, $rmp->{ysize},
		1133	$rmp->{expand2x}, $rmp->{layoutoptions1}, $rmp->{layoutoptions2}, $rmp->{layoutoptions3},
		1134	$rmp->{symmetry}, $rmp->{difficulty}, $rmp->{difficulty_given}, $rmp->{difficulty_increase},
		1135	$rmp->{dungeon_level}, $rmp->{dungeon_depth}, $rmp->{decoroptions}, $rmp->{orientation},
		1136	$rmp->{origin_y}, $rmp->{origin_x}, $rmp->{random_seed}, $rmp->{total_map_hp},
		1137	$rmp->{map_layout_style}, $rmp->{treasureoptions}, $rmp->{symmetry_used},
		1138	(cf::region::find $rmp->{region}), $rmp->{custom}
		1139	)
		1140	}
		1141
		1142	sub register {
		1143	my (undef, $regex) = @_;
		1144	my $pkg = caller;
		1145
		1146	no strict;
		1147	push @{"$pkg\::ISA"}, __PACKAGE__;
		1148
		1149	$EXT_MAP{$pkg} = qr<$regex>;
		1150	}
		1151
		1152	# also paths starting with '/'
		1153	$EXT_MAP{"cf::map"} = qr{^(?=/)};
		1154
		1155	sub thawer_merge {
		1156	my ($self, $merge) = @_;
		1157
		1158	# we have to keep some variables in memory intact
		1159	local $self->{path};
		1160	local $self->{load_path};
		1161	local $self->{deny_save};
		1162	local $self->{deny_reset};
		1163
		1164	$self->SUPER::thawer_merge ($merge);
		1165	}
		1166
		1167	sub normalise {
174	my ($who, $arg) = @_;	1168	my ($path, $base) = @_;
175		1169
176	if ($who->flag (FLAG_WIZ)) {	1170	# map plan:
177	$who->message ("reloading...");	1171	#
		1172	# /! non-realised random map exit (special hack!)
		1173	# {... are special paths that are not being touched
		1174	# ?xxx/... are special absolute paths
		1175	# ?random/... random maps
		1176	# /... normal maps
		1177	# ~user/... per-player map of a specific user
178		1178
179	warn "reloading...\n";	1179	$path =~ s/$PATH_SEP/\//go;
		1180
		1181	# treat it as relative path if it starts with
		1182	# something that looks reasonable
		1183	if ($path =~ m{^(?:\./|\.\./|\w)}) {
		1184	$base or Carp::carp "normalise called with relative path and no base: '$path'";
		1185
		1186	$base =~ s{[^/]+/?$}{};
		1187	$path = "$base/$path";
		1188	}
		1189
		1190	for ($path) {
		1191	redo if s{//}{/};
		1192	redo if s{/\.?/}{/};
		1193	redo if s{/[^/]+/\.\./}{/};
		1194	}
		1195
		1196	$path
		1197	}
		1198
		1199	sub new_from_path {
		1200	my (undef, $path, $base) = @_;
		1201
		1202	return $path if UNIVERSAL::isa $path, "cf::map"; # already a map object
		1203
		1204	$path = normalise $path, $base;
		1205
		1206	for my $pkg (keys %EXT_MAP) {
		1207	if ($path =~ $EXT_MAP{$pkg}) {
		1208	my $self = bless cf::map::new, $pkg;
		1209	$self->{path} = $path; $self->path ($path);
		1210	$self->init; # pass $1 etc.
		1211	return $self;
		1212	}
		1213	}
		1214
		1215	Carp::carp "unable to resolve path '$path'.";
		1216	()
		1217	}
		1218
		1219	sub init {
		1220	my ($self) = @_;
		1221
		1222	$self
		1223	}
		1224
		1225	sub as_string {
		1226	my ($self) = @_;
		1227
		1228	"$self->{path}"
		1229	}
		1230
		1231	# the displayed name, this is a one way mapping
		1232	sub visible_name {
		1233	&as_string
		1234	}
		1235
		1236	# the original (read-only) location
		1237	sub load_path {
		1238	my ($self) = @_;
		1239
		1240	sprintf "%s/%s/%s", cf::datadir, cf::mapdir, $self->{path}
		1241	}
		1242
		1243	# the temporary/swap location
		1244	sub save_path {
		1245	my ($self) = @_;
		1246
		1247	(my $path = $_[0]{path}) =~ s/\//$PATH_SEP/g;
		1248	sprintf "%s/%s/%s", cf::localdir, cf::tmpdir, $path
		1249	}
		1250
		1251	# the unique path, undef == no special unique path
		1252	sub uniq_path {
		1253	my ($self) = @_;
		1254
		1255	(my $path = $_[0]{path}) =~ s/\//$PATH_SEP/g;
		1256	sprintf "%s/%s/%s", cf::localdir, cf::uniquedir, $path
		1257	}
		1258
		1259	# and all this just because we cannot iterate over
		1260	# all maps in C++...
		1261	sub change_all_map_light {
		1262	my ($change) = @_;
		1263
		1264	$_->change_map_light ($change)
		1265	for grep $_->outdoor, values %cf::MAP;
		1266	}
		1267
		1268	sub unlink_save {
		1269	my ($self) = @_;
		1270
		1271	utf8::encode (my $save = $self->save_path);
		1272	IO::AIO::aioreq_pri 4; Coro::AIO::aio_unlink $save;
		1273	IO::AIO::aioreq_pri 4; Coro::AIO::aio_unlink "$save.pst";
		1274	}
		1275
		1276	sub load_header_from($) {
		1277	my ($self, $path) = @_;
		1278
		1279	utf8::encode $path;
		1280	aio_open $path, O_RDONLY, 0
		1281	or return;
		1282
		1283	$self->_load_header ($path)
		1284	or return;
		1285
		1286	$self->{load_path} = $path;
		1287
		1288	1
		1289	}
		1290
		1291	sub load_orig {
		1292	my ($self) = @_;
		1293
		1294	$self->load_header_from ($self->load_path)
		1295	}
		1296
		1297	sub load_temp {
		1298	my ($self) = @_;
		1299
		1300	$self->load_header_from ($self->save_path)
		1301	}
		1302
		1303	sub load_header {
		1304	my ($self) = @_;
		1305
		1306	if ($self->load_temp) {
		1307	$self->last_access ((delete $self->{last_access})
		1308	|| $cf::RUNTIME); #d#
		1309	# safety
		1310	$self->{instantiate_time} = $cf::RUNTIME
		1311	if $self->{instantiate_time} > $cf::RUNTIME;
		1312	} else {
		1313	$self->load_orig
		1314	or return;
		1315
		1316	$self->{load_original} = 1;
		1317	$self->{instantiate_time} = $cf::RUNTIME;
		1318	$self->last_access ($cf::RUNTIME);
		1319	$self->instantiate;
		1320	}
		1321
		1322	1
		1323	}
		1324
		1325	sub find;
		1326	sub find {
		1327	my ($path, $origin) = @_;
		1328
		1329	$path = normalise $path, $origin && $origin->path;
		1330
		1331	cf::lock_wait "map_find:$path";
		1332
		1333	$cf::MAP{$path} || do {
		1334	my $guard = cf::lock_acquire "map_find:$path";
		1335	my $map = new_from_path cf::map $path
		1336	or return;
		1337
		1338	$map->{last_save} = $cf::RUNTIME;
		1339
		1340	$map->load_header
		1341	or return;
		1342
		1343	if ($map->should_reset) {
		1344	$cf::WAIT_FOR_TICK->wait;
		1345	$map->reset;
		1346	undef $guard;
		1347	$map = find $path
		1348	or return;
		1349	}
		1350
		1351	$cf::MAP{$path} = $map
		1352	}
		1353	}
		1354
		1355	sub load {
		1356	my ($self) = @_;
		1357
		1358	my $path = $self->{path};
		1359	my $guard = cf::lock_acquire "map_load:$path";
		1360
		1361	return if $self->in_memory != cf::MAP_SWAPPED;
		1362
		1363	$self->in_memory (cf::MAP_LOADING);
		1364
		1365	$self->alloc;
		1366	$self->_load_objects ($self->{load_path}, 1)
		1367	or return;
		1368
		1369	$self->set_object_flag (cf::FLAG_OBJ_ORIGINAL, 1)
		1370	if delete $self->{load_original};
		1371
		1372	if (my $uniq = $self->uniq_path) {
		1373	utf8::encode $uniq;
		1374	if (aio_open $uniq, O_RDONLY, 0) {
		1375	$self->clear_unique_items;
		1376	$self->_load_objects ($uniq, 0);
		1377	}
		1378	}
		1379
		1380	Coro::cede;
		1381
		1382	# now do the right thing for maps
		1383	$self->link_multipart_objects;
		1384
		1385	unless ($self->{deny_activate}) {
		1386	$self->decay_objects;
		1387	$self->fix_auto_apply;
		1388	$self->update_buttons;
		1389	Coro::cede;
		1390	$self->set_darkness_map;
		1391	$self->difficulty ($self->estimate_difficulty)
		1392	unless $self->difficulty;
		1393	Coro::cede;
		1394	$self->activate;
		1395	}
		1396
		1397	$self->in_memory (cf::MAP_IN_MEMORY);
		1398	}
		1399
		1400	sub customise_for {
		1401	my ($self, $ob) = @_;
		1402
		1403	return find "~" . $ob->name . "/" . $self->{path}
		1404	if $self->per_player;
		1405
		1406	$self
		1407	}
		1408
		1409	# find and load all maps in the 3x3 area around a map
		1410	sub load_diag {
		1411	my ($map) = @_;
		1412
		1413	my @diag; # diagonal neighbours
		1414
		1415	for (0 .. 3) {
		1416	my $neigh = $map->tile_path ($_)
		1417	or next;
		1418	$neigh = find $neigh, $map
		1419	or next;
		1420	$neigh->load;
		1421
		1422	push @diag, [$neigh->tile_path (($_ + 3) % 4), $neigh],
		1423	[$neigh->tile_path (($_ + 1) % 4), $neigh];
		1424	}
		1425
		1426	for (@diag) {
		1427	my $neigh = find @$_
		1428	or next;
		1429	$neigh->load;
		1430	}
		1431	}
		1432
		1433	sub find_sync {
		1434	my ($path, $origin) = @_;
		1435
		1436	cf::sync_job { find $path, $origin }
		1437	}
		1438
		1439	sub do_load_sync {
		1440	my ($map) = @_;
		1441
		1442	cf::sync_job { $map->load };
		1443	}
		1444
		1445	our %MAP_PREFETCH;
		1446	our $MAP_PREFETCHER = Coro::async {
		1447	while () {
		1448	for my $path (keys %MAP_PREFETCH) {
		1449	my $map = find $path
		1450	or next;
		1451	$map->load;
		1452
		1453	delete $MAP_PREFETCH{$path};
		1454	}
		1455	Coro::schedule;
		1456	}
		1457	};
		1458
		1459	sub find_async {
		1460	my ($path, $origin) = @_;
		1461
		1462	$path = normalise $path, $origin && $origin->{path};
		1463
		1464	if (my $map = $cf::MAP{$path}) {
		1465	return $map if $map->in_memory == cf::MAP_IN_MEMORY;
		1466	}
		1467
		1468	$MAP_PREFETCH{$path} = 0;
		1469	$MAP_PREFETCHER->ready;
		1470
		1471	()
		1472	}
		1473
		1474	sub save {
		1475	my ($self) = @_;
		1476
		1477	my $lock = cf::lock_acquire "map_data:" . $self->path;
		1478
		1479	$self->{last_save} = $cf::RUNTIME;
		1480
		1481	return unless $self->dirty;
		1482
		1483	my $save = $self->save_path; utf8::encode $save;
		1484	my $uniq = $self->uniq_path; utf8::encode $uniq;
		1485
		1486	$self->{load_path} = $save;
		1487
		1488	return if $self->{deny_save};
		1489
		1490	local $self->{last_access} = $self->last_access;#d#
		1491
		1492	cf::async {
		1493	$_->contr->save for $self->players;
		1494	};
		1495
		1496	if ($uniq) {
		1497	$self->_save_objects ($save, cf::IO_HEADER | cf::IO_OBJECTS);
		1498	$self->_save_objects ($uniq, cf::IO_UNIQUES);
		1499	} else {
		1500	$self->_save_objects ($save, cf::IO_HEADER | cf::IO_OBJECTS | cf::IO_UNIQUES);
		1501	}
		1502	}
		1503
		1504	sub swap_out {
		1505	my ($self) = @_;
		1506
		1507	# save first because save cedes
		1508	$self->save;
		1509
		1510	my $lock = cf::lock_acquire "map_data:" . $self->path;
		1511
		1512	return if $self->players;
		1513	return if $self->in_memory != cf::MAP_IN_MEMORY;
		1514	return if $self->{deny_save};
		1515
		1516	$self->clear;
		1517	$self->in_memory (cf::MAP_SWAPPED);
		1518	}
		1519
		1520	sub reset_at {
		1521	my ($self) = @_;
		1522
		1523	# TODO: safety, remove and allow resettable per-player maps
		1524	return 1e99 if $self->isa ("ext::map_per_player");#d#
		1525	return 1e99 if $self->{deny_reset};
		1526
		1527	my $time = $self->fixed_resettime ? $self->{instantiate_time} : $self->last_access;
		1528	my $to = List::Util::min $MAX_RESET, $self->reset_timeout || $DEFAULT_RESET;
		1529
		1530	$time + $to
		1531	}
		1532
		1533	sub should_reset {
		1534	my ($self) = @_;
		1535
		1536	$self->reset_at <= $cf::RUNTIME
		1537	}
		1538
		1539	sub reset {
		1540	my ($self) = @_;
		1541
		1542	my $lock = cf::lock_acquire "map_data:$self->{path}";
		1543
		1544	return if $self->players;
		1545	return if $self->isa ("ext::map_per_player");#d#
		1546
		1547	warn "resetting map ", $self->path;#d#
		1548
		1549	delete $cf::MAP{$self->path};
		1550
		1551	$self->in_memory (cf::MAP_SWAPPED);
		1552	$self->clear;
		1553
		1554	$_->clear_links_to ($self) for values %cf::MAP;
		1555
		1556	$self->unlink_save;
		1557	$self->destroy;
		1558	}
		1559
		1560	my $nuke_counter = "aaaa";
		1561
		1562	sub nuke {
		1563	my ($self) = @_;
		1564
		1565	delete $cf::MAP{$self->path};
		1566
		1567	$self->unlink_save;
		1568
		1569	bless $self, "cf::map";
		1570	delete $self->{deny_reset};
		1571	$self->{deny_save} = 1;
		1572	$self->reset_timeout (1);
		1573	$self->path ($self->{path} = "{nuke}/" . ($nuke_counter++));
		1574
		1575	$cf::MAP{$self->path} = $self;
		1576
		1577	$self->reset; # polite request, might not happen
		1578	}
		1579
		1580	=item cf::map::unique_maps
		1581
		1582	Returns an arrayref of paths of all shared maps that have
		1583	instantiated unique items. May block.
		1584
		1585	=cut
		1586
		1587	sub unique_maps() {
		1588	my $files = aio_readdir cf::localdir . "/" . cf::uniquedir
		1589	or return;
		1590
		1591	my @paths;
		1592
		1593	for (@$files) {
		1594	utf8::decode $_;
		1595	next if /\.pst$/;
		1596	next unless /^$PATH_SEP/o;
		1597
		1598	s/\.map$//;
		1599	push @paths, $_;
		1600	}
		1601
		1602	\@paths
		1603	}
		1604
		1605	package cf;
		1606
		1607	=back
		1608
		1609	=head3 cf::object
		1610
		1611	=cut
		1612
		1613	package cf::object;
		1614
		1615	=over 4
		1616
		1617	=item $ob->inv_recursive
		1618
		1619	Returns the inventory of the object _and_ their inventories, recursively.
		1620
		1621	=cut
		1622
		1623	sub inv_recursive_;
		1624	sub inv_recursive_ {
		1625	map { $_, inv_recursive_ $_->inv } @_
		1626	}
		1627
		1628	sub inv_recursive {
		1629	inv_recursive_ inv $_[0]
		1630	}
		1631
		1632	package cf;
		1633
		1634	=back
		1635
		1636	=head3 cf::object::player
		1637
		1638	=over 4
		1639
		1640	=item $player_object->reply ($npc, $msg[, $flags])
		1641
		1642	Sends a message to the player, as if the npc C<$npc> replied. C<$npc>
		1643	can be C<undef>. Does the right thing when the player is currently in a
		1644	dialogue with the given NPC character.
		1645
		1646	=cut
		1647
		1648	# rough implementation of a future "reply" method that works
		1649	# with dialog boxes.
		1650	#TODO: the first argument must go, split into a $npc->reply_to ( method
		1651	sub cf::object::player::reply($$$;$) {
		1652	my ($self, $npc, $msg, $flags) = @_;
		1653
		1654	$flags = cf::NDI_BROWN | cf::NDI_UNIQUE unless @_ >= 4;
		1655
		1656	if ($self->{record_replies}) {
		1657	push @{ $self->{record_replies} }, [$npc, $msg, $flags];
		1658	} else {
		1659	$msg = $npc->name . " says: $msg" if $npc;
		1660	$self->message ($msg, $flags);
		1661	}
		1662	}
		1663
		1664	=item $player_object->may ("access")
		1665
		1666	Returns wether the given player is authorized to access resource "access"
		1667	(e.g. "command_wizcast").
		1668
		1669	=cut
		1670
		1671	sub cf::object::player::may {
		1672	my ($self, $access) = @_;
		1673
		1674	$self->flag (cf::FLAG_WIZ) ||
		1675	(ref $cf::CFG{"may_$access"}
		1676	? scalar grep $self->name eq $_, @{$cf::CFG{"may_$access"}}
		1677	: $cf::CFG{"may_$access"})
		1678	}
		1679
		1680	=item $player_object->enter_link
		1681
		1682	Freezes the player and moves him/her to a special map (C<{link}>).
		1683
		1684	The player should be reasonably safe there for short amounts of time. You
		1685	I<MUST> call C<leave_link> as soon as possible, though.
		1686
		1687	Will never block.
		1688
		1689	=item $player_object->leave_link ($map, $x, $y)
		1690
		1691	Moves the player out of the special C<{link}> map onto the specified
		1692	map. If the map is not valid (or omitted), the player will be moved back
		1693	to the location he/she was before the call to C<enter_link>, or, if that
		1694	fails, to the emergency map position.
		1695
		1696	Might block.
		1697
		1698	=cut
		1699
		1700	sub link_map {
		1701	unless ($LINK_MAP) {
		1702	$LINK_MAP = cf::map::find "{link}"
		1703	or do { warn "FATAL: unable to provide {link} map, exiting."; exit 1 };
		1704	$LINK_MAP->load;
		1705	}
		1706
		1707	$LINK_MAP
		1708	}
		1709
		1710	sub cf::object::player::enter_link {
		1711	my ($self) = @_;
		1712
		1713	$self->deactivate_recursive;
		1714
		1715	return if UNIVERSAL::isa $self->map, "ext::map_link";
		1716
		1717	$self->{_link_pos} ||= [$self->map->{path}, $self->x, $self->y]
		1718	if $self->map;
		1719
		1720	$self->enter_map ($LINK_MAP || link_map, 20, 20);
		1721	}
		1722
		1723	sub cf::object::player::leave_link {
		1724	my ($self, $map, $x, $y) = @_;
		1725
		1726	my $link_pos = delete $self->{_link_pos};
		1727
		1728	unless ($map) {
		1729	# restore original map position
		1730	($map, $x, $y) = @{ $link_pos || [] };
		1731	$map = cf::map::find $map;
		1732
		1733	unless ($map) {
		1734	($map, $x, $y) = @$EMERGENCY_POSITION;
		1735	$map = cf::map::find $map
		1736	or die "FATAL: cannot load emergency map\n";
		1737	}
		1738	}
		1739
		1740	($x, $y) = (-1, -1)
		1741	unless (defined $x) && (defined $y);
		1742
		1743	# use -1 or undef as default coordinates, not 0, 0
		1744	($x, $y) = ($map->enter_x, $map->enter_y)
		1745	if $x <=0 && $y <= 0;
		1746
		1747	$map->load;
		1748	$map->load_diag;
		1749
		1750	return unless $self->contr->active;
		1751	$self->activate_recursive;
		1752	$self->enter_map ($map, $x, $y);
		1753	}
		1754
		1755	cf::player->attach (
		1756	on_logout => sub {
		1757	my ($pl) = @_;
		1758
		1759	# abort map switching before logout
		1760	if ($pl->ob->{_link_pos}) {
		1761	cf::sync_job {
		1762	$pl->ob->leave_link
		1763	};
		1764	}
		1765	},
		1766	on_login => sub {
		1767	my ($pl) = @_;
		1768
		1769	# try to abort aborted map switching on player login :)
		1770	# should happen only on crashes
		1771	if ($pl->ob->{_link_pos}) {
		1772	$pl->ob->enter_link;
		1773	(async {
		1774	# we need this sleep as the login has a concurrent enter_exit running
		1775	# and this sleep increases chances of the player not ending up in scorn
		1776	$pl->ob->reply (undef,
		1777	"There was an internal problem at your last logout, "
		1778	. "the server will try to bring you to your intended destination in a second.",
		1779	cf::NDI_RED);
		1780	Coro::Timer::sleep 1;
		1781	$pl->ob->leave_link;
		1782	})->prio (2);
		1783	}
		1784	},
		1785	);
		1786
		1787	=item $player_object->goto ($path, $x, $y)
		1788
		1789	=cut
		1790
		1791	sub cf::object::player::goto {
		1792	my ($self, $path, $x, $y) = @_;
		1793
		1794	$self->enter_link;
		1795
		1796	(async {
		1797	my $map = cf::map::find $path;
		1798	$map = $map->customise_for ($self) if $map;
		1799
		1800	# warn "entering ", $map->path, " at ($x, $y)\n"
		1801	# if $map;
		1802
		1803	$map or $self->message ("The exit to '" . ($path->visible_name) . "' is closed", cf::NDI_UNIQUE | cf::NDI_RED);
		1804
		1805	$self->leave_link ($map, $x, $y);
		1806	})->prio (1);
		1807	}
		1808
		1809	=item $player_object->enter_exit ($exit_object)
		1810
		1811	=cut
		1812
		1813	sub parse_random_map_params {
		1814	my ($spec) = @_;
		1815
		1816	my $rmp = { # defaults
		1817	xsize => -1,
		1818	ysize => -1,
		1819	};
		1820
		1821	for (split /\n/, $spec) {
		1822	my ($k, $v) = split /\s+/, $_, 2;
		1823
		1824	$rmp->{lc $k} = $v if (length $k) && (length $v);
		1825	}
		1826
		1827	$rmp
		1828	}
		1829
		1830	sub prepare_random_map {
		1831	my ($exit) = @_;
		1832
		1833	# all this does is basically replace the /! path by
		1834	# a new random map path (?random/...) with a seed
		1835	# that depends on the exit object
		1836
		1837	my $rmp = parse_random_map_params $exit->msg;
		1838
		1839	if ($exit->map) {
		1840	$rmp->{region} = $exit->map->region_name;
		1841	$rmp->{origin_map} = $exit->map->path;
		1842	$rmp->{origin_x} = $exit->x;
		1843	$rmp->{origin_y} = $exit->y;
		1844	}
		1845
		1846	$rmp->{random_seed} ||= $exit->random_seed;
		1847
		1848	my $data = cf::to_json $rmp;
		1849	my $md5 = Digest::MD5::md5_hex $data;
		1850	my $meta = "$cf::RANDOM_MAPS/$md5.meta";
		1851
		1852	if (my $fh = aio_open "$meta~", O_WRONLY | O_CREAT, 0666) {
		1853	aio_write $fh, 0, (length $data), $data, 0;
		1854	undef $fh;
		1855	aio_rename "$meta~", $meta;
		1856
		1857	$exit->slaying ("?random/$md5");
		1858	$exit->msg (undef);
		1859	}
		1860	}
		1861
		1862	sub cf::object::player::enter_exit {
		1863	my ($self, $exit) = @_;
		1864
		1865	return unless $self->type == cf::PLAYER;
		1866
		1867	$self->enter_link;
		1868
		1869	(async {
		1870	$self->deactivate_recursive; # just to be sure
		1871	unless (eval {
		1872	prepare_random_map $exit
		1873	if $exit->slaying eq "/!";
		1874
		1875	my $path = new_from_path cf::map $exit->slaying, $exit->map && $exit->map->path;
		1876	$self->goto ($path, $exit->stats->hp, $exit->stats->sp);
		1877
		1878	1;
		1879	}) {
		1880	$self->message ("Something went wrong deep within the crossfire server. "
		1881	. "I'll try to bring you back to the map you were before. "
		1882	. "Please report this to the dungeon master!",
		1883	cf::NDI_UNIQUE | cf::NDI_RED);
		1884
		1885	warn "ERROR in enter_exit: $@";
		1886	$self->leave_link;
		1887	}
		1888	})->prio (1);
		1889	}
		1890
		1891	=head3 cf::client
		1892
		1893	=over 4
		1894
		1895	=item $client->send_drawinfo ($text, $flags)
		1896
		1897	Sends a drawinfo packet to the client. Circumvents output buffering so
		1898	should not be used under normal circumstances.
		1899
		1900	=cut
		1901
		1902	sub cf::client::send_drawinfo {
		1903	my ($self, $text, $flags) = @_;
		1904
		1905	utf8::encode $text;
		1906	$self->send_packet (sprintf "drawinfo %d %s", $flags, $text);
		1907	}
		1908
		1909
		1910	=item $success = $client->query ($flags, "text", \&cb)
		1911
		1912	Queues a query to the client, calling the given callback with
		1913	the reply text on a reply. flags can be C<cf::CS_QUERY_YESNO>,
		1914	C<cf::CS_QUERY_SINGLECHAR> or C<cf::CS_QUERY_HIDEINPUT> or C<0>.
		1915
		1916	Queries can fail, so check the return code. Or don't, as queries will become
		1917	reliable at some point in the future.
		1918
		1919	=cut
		1920
		1921	sub cf::client::query {
		1922	my ($self, $flags, $text, $cb) = @_;
		1923
		1924	return unless $self->state == ST_PLAYING
		1925	|| $self->state == ST_SETUP
		1926	|| $self->state == ST_CUSTOM;
		1927
		1928	$self->state (ST_CUSTOM);
		1929
		1930	utf8::encode $text;
		1931	push @{ $self->{query_queue} }, [(sprintf "query %d %s", $flags, $text), $cb];
		1932
		1933	$self->send_packet ($self->{query_queue}[0][0])
		1934	if @{ $self->{query_queue} } == 1;
		1935	}
		1936
		1937	cf::client->attach (
		1938	on_reply => sub {
		1939	my ($ns, $msg) = @_;
		1940
		1941	# this weird shuffling is so that direct followup queries
		1942	# get handled first
		1943	my $queue = delete $ns->{query_queue}
		1944	or return; # be conservative, not sure how that can happen, but we saw a crash here
		1945
		1946	(shift @$queue)->[1]->($msg);
		1947
		1948	push @{ $ns->{query_queue} }, @$queue;
		1949
		1950	if (@{ $ns->{query_queue} } == @$queue) {
		1951	if (@$queue) {
		1952	$ns->send_packet ($ns->{query_queue}[0][0]);
		1953	} else {
		1954	$ns->state (ST_PLAYING) if $ns->state == ST_CUSTOM;
		1955	}
		1956	}
		1957	},
		1958	);
		1959
		1960	=item $client->async (\&cb)
		1961
		1962	Create a new coroutine, running the specified callback. The coroutine will
		1963	be automatically cancelled when the client gets destroyed (e.g. on logout,
		1964	or loss of connection).
		1965
		1966	=cut
		1967
		1968	sub cf::client::async {
		1969	my ($self, $cb) = @_;
		1970
		1971	my $coro = &Coro::async ($cb);
		1972
		1973	$coro->on_destroy (sub {
		1974	delete $self->{_coro}{$coro+0};
		1975	});
		1976
		1977	$self->{_coro}{$coro+0} = $coro;
		1978
		1979	$coro
		1980	}
		1981
		1982	cf::client->attach (
		1983	on_destroy => sub {
		1984	my ($ns) = @_;
		1985
		1986	$_->cancel for values %{ (delete $ns->{_coro}) || {} };
		1987	},
		1988	);
		1989
		1990	=back
		1991
		1992
		1993	=head2 SAFE SCRIPTING
		1994
		1995	Functions that provide a safe environment to compile and execute
		1996	snippets of perl code without them endangering the safety of the server
		1997	itself. Looping constructs, I/O operators and other built-in functionality
		1998	is not available in the safe scripting environment, and the number of
		1999	functions and methods that can be called is greatly reduced.
		2000
		2001	=cut
		2002
		2003	our $safe = new Safe "safe";
		2004	our $safe_hole = new Safe::Hole;
		2005
		2006	$SIG{FPE} = 'IGNORE';
		2007
		2008	$safe->permit_only (Opcode::opset qw(:base_core :base_mem :base_orig :base_math sort time));
		2009
		2010	# here we export the classes and methods available to script code
		2011
		2012	=pod
		2013
		2014	The following fucntions and emthods are available within a safe environment:
		2015
		2016	cf::object contr pay_amount pay_player map
		2017	cf::object::player player
		2018	cf::player peaceful
		2019	cf::map trigger
		2020
		2021	=cut
		2022
		2023	for (
		2024	["cf::object" => qw(contr pay_amount pay_player map)],
		2025	["cf::object::player" => qw(player)],
		2026	["cf::player" => qw(peaceful)],
		2027	["cf::map" => qw(trigger)],
		2028	) {
		2029	no strict 'refs';
		2030	my ($pkg, @funs) = @$_;
		2031	*{"safe::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})
		2032	for @funs;
		2033	}
		2034
		2035	=over 4
		2036
		2037	=item @retval = safe_eval $code, [var => value, ...]
		2038
		2039	Compiled and executes the given perl code snippet. additional var/value
		2040	pairs result in temporary local (my) scalar variables of the given name
		2041	that are available in the code snippet. Example:
		2042
		2043	my $five = safe_eval '$first + $second', first => 1, second => 4;
		2044
		2045	=cut
		2046
		2047	sub safe_eval($;@) {
		2048	my ($code, %vars) = @_;
		2049
		2050	my $qcode = $code;
		2051	$qcode =~ s/"/‟/g; # not allowed in #line filenames
		2052	$qcode =~ s/\n/\\n/g;
		2053
		2054	local $_;
		2055	local @safe::cf::_safe_eval_args = values %vars;
		2056
		2057	my $eval =
		2058	"do {\n"
		2059	. "my (" . (join ",", map "\$$_", keys %vars) . ") = \@cf::_safe_eval_args;\n"
		2060	. "#line 0 \"{$qcode}\"\n"
		2061	. $code
		2062	. "\n}"
		2063	;
		2064
		2065	sub_generation_inc;
		2066	my @res = wantarray ? $safe->reval ($eval) : scalar $safe->reval ($eval);
		2067	sub_generation_inc;
		2068
		2069	if ($@) {
		2070	warn "$@";
		2071	warn "while executing safe code '$code'\n";
		2072	warn "with arguments " . (join " ", %vars) . "\n";
		2073	}
		2074
		2075	wantarray ? @res : $res[0]
		2076	}
		2077
		2078	=item cf::register_script_function $function => $cb
		2079
		2080	Register a function that can be called from within map/npc scripts. The
		2081	function should be reasonably secure and should be put into a package name
		2082	like the extension.
		2083
		2084	Example: register a function that gets called whenever a map script calls
		2085	C<rent::overview>, as used by the C<rent> extension.
		2086
		2087	cf::register_script_function "rent::overview" => sub {
		2088	...
		2089	};
		2090
		2091	=cut
		2092
		2093	sub register_script_function {
		2094	my ($fun, $cb) = @_;
		2095
		2096	no strict 'refs';
		2097	*{"safe::$fun"} = $safe_hole->wrap ($cb);
		2098	}
		2099
		2100	=back
		2101
		2102	=cut
		2103
		2104	#############################################################################
		2105
		2106	=head2 EXTENSION DATABASE SUPPORT
		2107
		2108	Crossfire maintains a very simple database for extension use. It can
		2109	currently store anything that can be serialised using Storable, which
		2110	excludes objects.
		2111
		2112	The parameter C<$family> should best start with the name of the extension
		2113	using it, it should be unique.
		2114
		2115	=over 4
		2116
		2117	=item $hashref = cf::db_get $family
		2118
		2119	Return a hashref for use by the extension C<$family>, which can be
		2120	modified. After modifications, you have to call C<cf::db_dirty> or
		2121	C<cf::db_sync>.
		2122
		2123	=item $value = cf::db_get $family => $key
		2124
		2125	Returns a single value from the database
		2126
		2127	=item cf::db_put $family => $hashref
		2128
		2129	Stores the given family hashref into the database. Updates are delayed, if
		2130	you want the data to be synced to disk immediately, use C<cf::db_sync>.
		2131
		2132	=item cf::db_put $family => $key => $value
		2133
		2134	Stores the given C<$value> in the family hash. Updates are delayed, if you
		2135	want the data to be synced to disk immediately, use C<cf::db_sync>.
		2136
		2137	=item cf::db_dirty
		2138
		2139	Marks the database as dirty, to be updated at a later time.
		2140
		2141	=item cf::db_sync
		2142
		2143	Immediately write the database to disk I<if it is dirty>.
		2144
		2145	=cut
		2146
		2147	our $DB;
		2148
		2149	{
		2150	my $path = cf::localdir . "/database.pst";
		2151
		2152	sub db_load() {
		2153	$DB = stat $path ? Storable::retrieve $path : { };
		2154	}
		2155
		2156	my $pid;
		2157
		2158	sub db_save() {
		2159	waitpid $pid, 0 if $pid;
		2160	if (0 == ($pid = fork)) {
		2161	$DB->{_meta}{version} = 1;
		2162	Storable::nstore $DB, "$path~";
		2163	rename "$path~", $path;
		2164	cf::_exit 0 if defined $pid;
		2165	}
		2166	}
		2167
		2168	my $dirty;
		2169
		2170	sub db_sync() {
		2171	db_save if $dirty;
		2172	undef $dirty;
		2173	}
		2174
		2175	my $idle = Event->idle (min => $TICK * 2.8, max => 10, repeat => 0, data => WF_AUTOCANCEL, cb => sub {
		2176	db_sync;
		2177	});
		2178
		2179	sub db_dirty() {
		2180	$dirty = 1;
		2181	$idle->start;
		2182	}
		2183
		2184	sub db_get($;$) {
		2185	@_ >= 2
		2186	? $DB->{$_[0]}{$_[1]}
		2187	: ($DB->{$_[0]} ||= { })
		2188	}
		2189
		2190	sub db_put($$;$) {
		2191	if (@_ >= 3) {
		2192	$DB->{$_[0]}{$_[1]} = $_[2];
		2193	} else {
		2194	$DB->{$_[0]} = $_[1];
		2195	}
		2196	db_dirty;
		2197	}
		2198
		2199	cf::global->attach (
		2200	prio => 10000,
		2201	on_cleanup => sub {
		2202	db_sync;
		2203	},
		2204	);
		2205	}
		2206
		2207	#############################################################################
		2208	# the server's main()
		2209
		2210	sub cfg_load {
		2211	open my $fh, "<:utf8", cf::confdir . "/config"
		2212	or return;
		2213
		2214	local $/;
		2215	*CFG = YAML::Syck::Load <$fh>;
		2216
		2217	$EMERGENCY_POSITION = $CFG{emergency_position} || ["/world/world_105_115", 5, 37];
		2218
		2219	$cf::map::MAX_RESET = $CFG{map_max_reset} if exists $CFG{map_max_reset};
		2220	$cf::map::DEFAULT_RESET = $CFG{map_default_reset} if exists $CFG{map_default_reset};
		2221
		2222	if (exists $CFG{mlockall}) {
180	eval {	2223	eval {
181	unload_extension $_ for @exts;	2224	$CFG{mlockall} ? eval "mlockall()" : eval "munlockall()"
182	delete $INC{"cf.pm"};	2225	and die "WARNING: m(un)lockall failed: $!\n";
183
184	# don't, removes xs symbols, too
185	#Symbol::delete_package $pkg;
186
187	require cf;
188	};	2226	};
189	warn $@ if $@;	2227	warn $@ if $@;
190	$who->message ($@) if $@;	2228	}
191	warn "reloaded\n";	2229	}
192		2230
193	$who->message ("reloaded");	2231	sub main {
194	} else {	2232	# we must not ever block the main coroutine
195	$who->message ("Intruder Alert!");	2233	local $Coro::idle = sub {
		2234	Carp::cluck "FATAL: Coro::idle was called, major BUG, use cf::sync_job!\n";#d#
		2235	(async {
		2236	Event::one_event;
		2237	})->prio (Coro::PRIO_MAX);
196	}	2238	};
		2239
		2240	cfg_load;
		2241	db_load;
		2242	load_extensions;
		2243	Event::loop;
		2244	}
		2245
		2246	#############################################################################
		2247	# initialisation and cleanup
		2248
		2249	# install some emergency cleanup handlers
		2250	BEGIN {
		2251	for my $signal (qw(INT HUP TERM)) {
		2252	Event->signal (
		2253	data => WF_AUTOCANCEL,
		2254	signal => $signal,
		2255	cb => sub {
		2256	cf::cleanup "SIG$signal";
		2257	},
		2258	);
		2259	}
		2260	}
		2261
		2262	sub emergency_save() {
		2263	my $freeze_guard = cf::freeze_mainloop;
		2264
		2265	warn "enter emergency perl save\n";
		2266
		2267	cf::sync_job {
		2268	# use a peculiar iteration method to avoid tripping on perl
		2269	# refcount bugs in for. also avoids problems with players
		2270	# and maps saved/destroyed asynchronously.
		2271	warn "begin emergency player save\n";
		2272	for my $login (keys %cf::PLAYER) {
		2273	my $pl = $cf::PLAYER{$login} or next;
		2274	$pl->valid or next;
		2275	$pl->save;
		2276	}
		2277	warn "end emergency player save\n";
		2278
		2279	warn "begin emergency map save\n";
		2280	for my $path (keys %cf::MAP) {
		2281	my $map = $cf::MAP{$path} or next;
		2282	$map->valid or next;
		2283	$map->save;
		2284	}
		2285	warn "end emergency map save\n";
		2286	};
		2287
		2288	warn "leave emergency perl save\n";
		2289	}
		2290
		2291	sub reload() {
		2292	# can/must only be called in main
		2293	if ($Coro::current != $Coro::main) {
		2294	warn "can only reload from main coroutine\n";
		2295	return;
		2296	}
		2297
		2298	warn "reloading...";
		2299
		2300	warn "freezing server";
		2301	my $guard = freeze_mainloop;
		2302	cf::emergency_save;
		2303
		2304	warn "sync database to disk";
		2305	cf::db_sync;
		2306	IO::AIO::flush;
		2307
		2308	eval {
		2309	# if anything goes wrong in here, we should simply crash as we already saved
		2310
		2311	warn "cancel all watchers";
		2312	for (Event::all_watchers) {
		2313	$_->cancel if $_->data & WF_AUTOCANCEL;
		2314	}
		2315
		2316	warn "cancel all extension coros";
		2317	$_->cancel for values %EXT_CORO;
		2318	%EXT_CORO = ();
		2319
		2320	warn "remove commands";
		2321	%COMMAND = ();
		2322
		2323	warn "remove ext commands";
		2324	%EXTCMD = ();
		2325
		2326	warn "unload/nuke all extensions";
		2327	for my $pkg (@EXTS) {
		2328	warn "... unloading $pkg";
		2329
		2330	if (my $cb = $pkg->can ("unload")) {
		2331	eval {
		2332	$cb->($pkg);
		2333	1
		2334	} or warn "$pkg unloaded, but with errors: $@";
		2335	}
		2336
		2337	warn "... nuking $pkg";
		2338	Symbol::delete_package $pkg;
		2339	}
		2340
		2341	warn "unload all perl modules loaded from $LIBDIR";
		2342	while (my ($k, $v) = each %INC) {
		2343	next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;
		2344
		2345	warn "removing <$k>";
		2346	delete $INC{$k};
		2347
		2348	$k =~ s/\.pm$//;
		2349	$k =~ s/\//::/g;
		2350
		2351	if (my $cb = $k->can ("unload_module")) {
		2352	$cb->();
		2353	}
		2354
		2355	Symbol::delete_package $k;
		2356	}
		2357
		2358	warn "get rid of safe::, as good as possible";
		2359	Symbol::delete_package "safe::$_"
		2360	for qw(cf::attachable cf::object cf::object::player cf::client cf::player cf::map cf::party cf::region);
		2361
		2362	warn "unload cf.pm \"a bit\"";
		2363	delete $INC{"cf.pm"};
		2364
		2365	# don't, removes xs symbols, too,
		2366	# and global variables created in xs
		2367	#Symbol::delete_package __PACKAGE__;
		2368
		2369	warn "reloading cf.pm";
		2370	require cf;
		2371	cf::_connect_to_perl; # nominally unnecessary, but cannot hurt
		2372
		2373	warn "load config and database again";
		2374	cf::cfg_load;
		2375	cf::db_load;
		2376
		2377	warn "load extensions";
		2378	cf::load_extensions;
		2379
		2380	warn "reattach attachments to objects/players";
		2381	_global_reattach;
		2382	warn "reattach attachments to maps";
		2383	reattach $_ for values %MAP;
		2384	};
		2385
		2386	if ($@) {
		2387	warn $@;
		2388	warn "error while reloading, exiting.";
		2389	exit 1;
		2390	}
		2391
		2392	warn "reloaded";
197	};	2393	};
198		2394
199	load_extensions;	2395	our $RELOAD_WATCHER; # used only during reload
		2396
		2397	register_command "reload" => sub {
		2398	my ($who, $arg) = @_;
		2399
		2400	if ($who->flag (FLAG_WIZ)) {
		2401	$who->message ("reloading server.");
		2402
		2403	# doing reload synchronously and two reloads happen back-to-back,
		2404	# coro crashes during coro_state_free->destroy here.
		2405
		2406	$RELOAD_WATCHER ||= Event->timer (after => 0, data => WF_AUTOCANCEL, cb => sub {
		2407	reload;
		2408	undef $RELOAD_WATCHER;
		2409	});
		2410	}
		2411	};
		2412
		2413	unshift @INC, $LIBDIR;
		2414
		2415	$TICK_WATCHER = Event->timer (
		2416	reentrant => 0,
		2417	prio => 0,
		2418	at => $NEXT_TICK || $TICK,
		2419	data => WF_AUTOCANCEL,
		2420	cb => sub {
		2421	$NOW = Event::time;
		2422
		2423	cf::server_tick; # one server iteration
		2424	$RUNTIME += $TICK;
		2425	$NEXT_TICK += $TICK;
		2426
		2427	$WAIT_FOR_TICK->broadcast;
		2428	$WAIT_FOR_TICK_ONE->send if $WAIT_FOR_TICK_ONE->awaited;
		2429
		2430	# if we are delayed by four ticks or more, skip them all
		2431	$NEXT_TICK = Event::time if Event::time >= $NEXT_TICK + $TICK * 4;
		2432
		2433	$TICK_WATCHER->at ($NEXT_TICK);
		2434	$TICK_WATCHER->start;
		2435	},
		2436	);
		2437
		2438	IO::AIO::max_poll_time $TICK * 0.2;
		2439
		2440	$AIO_POLL_WATCHER = Event->io (
		2441	fd => IO::AIO::poll_fileno,
		2442	poll => 'r',
		2443	prio => 5,
		2444	data => WF_AUTOCANCEL,
		2445	cb => \&IO::AIO::poll_cb,
		2446	);
		2447
		2448	$WRITE_RUNTIME_WATCHER = Event->timer (
		2449	data => WF_AUTOCANCEL,
		2450	after => 0,
		2451	interval => 10,
		2452	cb => sub {
		2453	(Coro::unblock_sub {
		2454	write_runtime
		2455	or warn "ERROR: unable to write runtime file: $!";
		2456	})->();
		2457	},
		2458	);
		2459
		2460	END { cf::emergency_save }
200		2461
201	1	2462	1
202		2463

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