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Comparing deliantra/server/lib/cf.pm (file contents):
Revision 1.5 by root, Wed Feb 8 03:46:15 2006 UTC vs.
Revision 1.166 by root, Sat Jan 13 23:06:13 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 3.3 ();
		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 $NEXT_TICK;
		50	our $NOW;
		51
		52	our %CFG;
		53
		54	our $UPTIME; $UPTIME ||= time;
		55	our $RUNTIME;
		56
		57	our %PLAYER; # all users
		58	our %MAP; # all maps
		59	our $LINK_MAP; # the special {link} map, which is always available
		60	our $RANDOM_MAPS = cf::localdir . "/random";
		61
		62	our $WAIT_FOR_TICK; $WAIT_FOR_TICK ||= new Coro::Signal;
		63	our $WAIT_FOR_TICK_ONE; $WAIT_FOR_TICK_ONE ||= new Coro::Signal;
		64
		65	# used to convert map paths into valid unix filenames by replacing / by ∕
		66	our $PATH_SEP = "∕"; # U+2215, chosen purely for visual reasons
		67
		68	binmode STDOUT;
		69	binmode STDERR;
		70
		71	# read virtual server time, if available
		72	unless ($RUNTIME || !-e cf::localdir . "/runtime") {
		73	open my $fh, "<", cf::localdir . "/runtime"
		74	or die "unable to read runtime file: $!";
		75	$RUNTIME = <$fh> + 0.;
		76	}
		77
		78	mkdir cf::localdir;
		79	mkdir cf::localdir . "/" . cf::playerdir;
		80	mkdir cf::localdir . "/" . cf::tmpdir;
		81	mkdir cf::localdir . "/" . cf::uniquedir;
		82	mkdir $RANDOM_MAPS;
		83
		84	our $EMERGENCY_POSITION;
		85
		86	#############################################################################
		87
		88	=head2 GLOBAL VARIABLES
		89
		90	=over 4
		91
		92	=item $cf::UPTIME
		93
		94	The timestamp of the server start (so not actually an uptime).
		95
		96	=item $cf::RUNTIME
		97
		98	The time this server has run, starts at 0 and is increased by $cf::TICK on
		99	every server tick.
		100
		101	=item $cf::LIBDIR
		102
		103	The perl library directory, where extensions and cf-specific modules can
		104	be found. It will be added to C<@INC> automatically.
		105
		106	=item $cf::NOW
		107
		108	The time of the last (current) server tick.
		109
		110	=item $cf::TICK
		111
		112	The interval between server ticks, in seconds.
		113
		114	=item %cf::CFG
		115
		116	Configuration for the server, loaded from C</etc/crossfire/config>, or
		117	from wherever your confdir points to.
		118
		119	=item $cf::WAIT_FOR_TICK, $cf::WAIT_FOR_TICK_ONE
		120
		121	These are Coro::Signal objects that are C<< ->broadcast >> (WAIT_FOR_TICK)
		122	or C<< ->send >> (WAIT_FOR_TICK_ONE) on after normal server tick
		123	processing has been done. Call C<< ->wait >> on them to maximise the
		124	window of cpu time available, or simply to synchronise to the server tick.
		125
		126	=back
		127
		128	=cut
12		129
13	BEGIN {	130	BEGIN {
14	@EVENT = map lc, @EVENT;
15
16	*CORE::GLOBAL::warn = sub {	131	*CORE::GLOBAL::warn = sub {
17	my $msg = join "", @_;	132	my $msg = join "", @_;
		133	utf8::encode $msg;
		134
18	$msg .= "\n"	135	$msg .= "\n"
19	unless $msg =~ /\n$/;	136	unless $msg =~ /\n$/;
20		137
21	print STDERR "cfperl: $msg";
22	LOG llevError, "cfperl: $msg";	138	LOG llevError, $msg;
23	};	139	};
24	}	140	}
25		141
26	# generate property mutators	142	@safe::cf::global::ISA = @cf::global::ISA = 'cf::attachable';
27	sub prop_gen {	143	@safe::cf::object::ISA = @cf::object::ISA = 'cf::attachable';
28	my ($prefix, $class) = @_;	144	@safe::cf::player::ISA = @cf::player::ISA = 'cf::attachable';
		145	@safe::cf::client::ISA = @cf::client::ISA = 'cf::attachable';
		146	@safe::cf::map::ISA = @cf::map::ISA = 'cf::attachable';
		147	@safe::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object';
29		148
		149	# we bless all objects into (empty) derived classes to force a method lookup
		150	# within the Safe compartment.
		151	for my $pkg (qw(
		152	cf::global cf::attachable
		153	cf::object cf::object::player
		154	cf::client cf::player
		155	cf::arch cf::living
		156	cf::map cf::party cf::region
		157	)) {
30	no strict 'refs';	158	no strict 'refs';
		159	@{"safe::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;
		160	}
31		161
32	for my $prop (keys %PROP_TYPE) {	162	$Event::DIED = sub {
33	$prop =~ /^\Q$prefix\E_(.*$)/ or next;	163	warn "error in event callback: @_";
34	my $sub = lc $1;	164	};
35		165
36	my $type = $PROP_TYPE{$prop};	166	=head2 UTILITY FUNCTIONS
37	my $idx = $PROP_IDX {$prop};
38		167
39	*{"$class\::get_$sub"} = *{"$class\::$sub"} = sub {	168	=over 4
40	$_[0]->get_property ($type, $idx)	169
		170	=item dumpval $ref
		171
		172	=cut
		173
		174	sub dumpval {
		175	eval {
		176	local $SIG{__DIE__};
		177	my $d;
		178	if (1) {
		179	$d = new Data::Dumper([$_[0]], ["*var"]);
		180	$d->Terse(1);
		181	$d->Indent(2);
		182	$d->Quotekeys(0);
		183	$d->Useqq(1);
		184	#$d->Bless(...);
		185	$d->Seen($_[1]) if @_ > 1;
		186	$d = $d->Dump();
41	};	187	}
		188	$d =~ s/([\x00-\x07\x09\x0b\x0c\x0e-\x1f])/sprintf "\\x%02x", ord($1)/ge;
		189	$d
		190	} || "[unable to dump $_[0]: '$@']";
		191	}
42		192
43	*{"$class\::set_$sub"} = sub {	193	use JSON::Syck (); # TODO# replace by JSON::PC once working
44	$_[0]->set_property ($type, $idx, $_[1]);	194
		195	=item $ref = cf::from_json $json
		196
		197	Converts a JSON string into the corresponding perl data structure.
		198
		199	=cut
		200
		201	sub from_json($) {
		202	$JSON::Syck::ImplicitUnicode = 1; # work around JSON::Syck bugs
		203	JSON::Syck::Load $_[0]
		204	}
		205
		206	=item $json = cf::to_json $ref
		207
		208	Converts a perl data structure into its JSON representation.
		209
		210	=cut
		211
		212	sub to_json($) {
		213	$JSON::Syck::ImplicitUnicode = 0; # work around JSON::Syck bugs
		214	JSON::Syck::Dump $_[0]
		215	}
		216
		217	=item cf::lock_wait $string
		218
		219	Wait until the given lock is available. See cf::lock_acquire.
		220
		221	=item my $lock = cf::lock_acquire $string
		222
		223	Wait until the given lock is available and then acquires it and returns
		224	a Coro::guard object. If the guard object gets destroyed (goes out of scope,
		225	for example when the coroutine gets canceled), the lock is automatically
		226	returned.
		227
		228	Lock names should begin with a unique identifier (for example, cf::map::find
		229	uses map_find and cf::map::load uses map_load).
		230
		231	=cut
		232
		233	our %LOCK;
		234
		235	sub lock_wait($) {
		236	my ($key) = @_;
		237
		238	# wait for lock, if any
		239	while ($LOCK{$key}) {
		240	push @{ $LOCK{$key} }, $Coro::current;
		241	Coro::schedule;
		242	}
		243	}
		244
		245	sub lock_acquire($) {
		246	my ($key) = @_;
		247
		248	# wait, to be sure we are not locked
		249	lock_wait $key;
		250
		251	$LOCK{$key} = [];
		252
		253	Coro::guard {
		254	# wake up all waiters, to be on the safe side
		255	$_->ready for @{ delete $LOCK{$key} };
		256	}
		257	}
		258
		259	sub freeze_mainloop {
		260	return unless $TICK_WATCHER->is_active;
		261
		262	my $guard = Coro::guard { $TICK_WATCHER->start };
		263	$TICK_WATCHER->stop;
		264	$guard
		265	}
		266
		267	=item cf::async { BLOCK }
		268
		269	Currently the same as Coro::async_pool, meaning you cannot use
		270	C<on_destroy>, C<join> or other gimmicks on these coroutines. The only
		271	thing you are allowed to do is call C<prio> on it.
		272
		273	=cut
		274
		275	BEGIN { *async = \&Coro::async_pool }
		276
		277	=item cf::sync_job { BLOCK }
		278
		279	The design of crossfire+ requires that the main coro ($Coro::main) is
		280	always able to handle events or runnable, as crossfire+ is only partly
		281	reentrant. Thus "blocking" it by e.g. waiting for I/O is not acceptable.
		282
		283	If it must be done, put the blocking parts into C<sync_job>. This will run
		284	the given BLOCK in another coroutine while waiting for the result. The
		285	server will be frozen during this time, so the block should either finish
		286	fast or be very important.
		287
		288	=cut
		289
		290	sub sync_job(&) {
		291	my ($job) = @_;
		292
		293	if ($Coro::current == $Coro::main) {
		294	# this is the main coro, too bad, we have to block
		295	# till the operation succeeds, freezing the server :/
		296
		297	# TODO: use suspend/resume instead
		298	# (but this is cancel-safe)
		299	my $freeze_guard = freeze_mainloop;
		300
		301	my $busy = 1;
		302	my @res;
		303
		304	(async {
		305	@res = eval { $job->() };
		306	warn $@ if $@;
		307	undef $busy;
		308	})->prio (Coro::PRIO_MAX);
		309
		310	while ($busy) {
		311	Coro::cede or Event::one_event;
45	};	312	}
		313
		314	wantarray ? @res : $res[0]
		315	} else {
		316	# we are in another coroutine, how wonderful, everything just works
		317
		318	$job->()
		319	}
		320	}
		321
		322	=item $coro = cf::async_ext { BLOCK }
		323
		324	Like async, but this coro is automatically being canceled when the
		325	extension calling this is being unloaded.
		326
		327	=cut
		328
		329	sub async_ext(&) {
		330	my $cb = shift;
		331
		332	my $coro = &Coro::async ($cb);
		333
		334	$coro->on_destroy (sub {
		335	delete $EXT_CORO{$coro+0};
46	}	336	});
47	}	337	$EXT_CORO{$coro+0} = $coro;
48		338
49	# auto-generate most of the API	339	$coro
		340	}
50		341
51	prop_gen OBJECT_PROP => "cf::object";	342	sub write_runtime {
52	# CFAPI_OBJECT_ANIMATION?	343	return unless $TICK_WATCHER->is_active;
53	prop_gen PLAYER_PROP => "cf::object::player";
54		344
55	prop_gen MAP_PROP => "cf::map";	345	my $runtime = cf::localdir . "/runtime";
56	prop_gen ARCH_PROP => "cf::arch";
57		346
58	# guessed hierarchies	347	my $fh = aio_open "$runtime~", O_WRONLY | O_CREAT, 0644
59
60	@cf::object::player::ISA = 'cf::object';
61	@cf::object::map::ISA = 'cf::object';
62
63	my %ext_pkg;
64	my @exts;
65	my @hook;
66	my %command;
67
68	sub inject_event {
69	my ($data) = @_;
70
71	my $cb = $hook[$data->{event_code}]{$data->{extension}}
72	or return;	348	or return;
73		349
74	$cb->($data)	350	my $value = $cf::RUNTIME + 1 + 10; # 10 is the runtime save interval, for a monotonic clock
75	}	351	(aio_write $fh, 0, (length $value), $value, 0) <= 0
		352	and return;
76		353
77	sub inject_global_event {	354	aio_fsync $fh
78	my ($data) = @_;	355	and return;
79		356
80	my $cb = $hook[$data->{event_code}]	357	close $fh
81	or return;	358	or return;
82		359
83	$_->($data) for values %$cb;	360	aio_rename "$runtime~", $runtime
		361	and return;
84		362
85	()
86	}
87
88	sub inject_command {
89	my ($name, $obj, $params) = @_;
90
91	for my $cmd (@{ $command{$name} }) {
92	$cmd->[1]->($obj, $params);
93	}
94
95	-1	363	1
96	}	364	}
		365
		366	=back
		367
		368	=cut
		369
		370	#############################################################################
		371
		372	=head2 ATTACHABLE OBJECTS
		373
		374	Many objects in crossfire are so-called attachable objects. That means you can
		375	attach callbacks/event handlers (a collection of which is called an "attachment")
		376	to it. All such attachable objects support the following methods.
		377
		378	In the following description, CLASS can be any of C<global>, C<object>
		379	C<player>, C<client> or C<map> (i.e. the attachable objects in
		380	crossfire+).
		381
		382	=over 4
		383
		384	=item $attachable->attach ($attachment, key => $value...)
		385
		386	=item $attachable->detach ($attachment)
		387
		388	Attach/detach a pre-registered attachment to a specific object and give it
		389	the specified key/value pairs as arguments.
		390
		391	Example, attach a minesweeper attachment to the given object, making it a
		392	10x10 minesweeper game:
		393
		394	$obj->attach (minesweeper => width => 10, height => 10);
		395
		396	=item $bool = $attachable->attached ($name)
		397
		398	Checks wether the named attachment is currently attached to the object.
		399
		400	=item cf::CLASS->attach ...
		401
		402	=item cf::CLASS->detach ...
		403
		404	Define an anonymous attachment and attach it to all objects of the given
		405	CLASS. See the next function for an explanation of its arguments.
		406
		407	You can attach to global events by using the C<cf::global> class.
		408
		409	Example, log all player logins:
		410
		411	cf::player->attach (
		412	on_login => sub {
		413	my ($pl) = @_;
		414	...
		415	},
		416	);
		417
		418	Example, attach to the jeweler skill:
		419
		420	cf::object->attach (
		421	type => cf::SKILL,
		422	subtype => cf::SK_JEWELER,
		423	on_use_skill => sub {
		424	my ($sk, $ob, $part, $dir, $msg) = @_;
		425	...
		426	},
		427	);
		428
		429	=item cf::CLASS::attachment $name, ...
		430
		431	Register an attachment by C<$name> through which attachable objects of the
		432	given CLASS can refer to this attachment.
		433
		434	Some classes such as crossfire maps and objects can specify attachments
		435	that are attached at load/instantiate time, thus the need for a name.
		436
		437	These calls expect any number of the following handler/hook descriptions:
		438
		439	=over 4
		440
		441	=item prio => $number
		442
		443	Set the priority for all following handlers/hooks (unless overwritten
		444	by another C<prio> setting). Lower priority handlers get executed
		445	earlier. The default priority is C<0>, and many built-in handlers are
		446	registered at priority C<-1000>, so lower priorities should not be used
		447	unless you know what you are doing.
		448
		449	=item type => $type
		450
		451	(Only for C<< cf::object->attach >> calls), limits the attachment to the
		452	given type of objects only (the additional parameter C<subtype> can be
		453	used to further limit to the given subtype).
		454
		455	=item on_I<event> => \&cb
		456
		457	Call the given code reference whenever the named event happens (event is
		458	something like C<instantiate>, C<apply>, C<use_skill> and so on, and which
		459	handlers are recognised generally depends on the type of object these
		460	handlers attach to).
		461
		462	See F<include/eventinc.h> for the full list of events supported, and their
		463	class.
		464
		465	=item package => package::
		466
		467	Look for sub functions of the name C<< on_I<event> >> in the given
		468	package and register them. Only handlers for eevents supported by the
		469	object/class are recognised.
		470
		471	=back
		472
		473	Example, define an attachment called "sockpuppet" that calls the given
		474	event handler when a monster attacks:
		475
		476	cf::object::attachment sockpuppet =>
		477	on_skill_attack => sub {
		478	my ($self, $victim) = @_;
		479	...
		480	}
		481	}
		482
		483	=item $attachable->valid
		484
		485	Just because you have a perl object does not mean that the corresponding
		486	C-level object still exists. If you try to access an object that has no
		487	valid C counterpart anymore you get an exception at runtime. This method
		488	can be used to test for existence of the C object part without causing an
		489	exception.
		490
		491	=cut
		492
		493	# the following variables are defined in .xs and must not be re-created
		494	our @CB_GLOBAL = (); # registry for all global events
		495	our @CB_ATTACHABLE = (); # registry for all attachables
		496	our @CB_OBJECT = (); # all objects (should not be used except in emergency)
		497	our @CB_PLAYER = ();
		498	our @CB_CLIENT = ();
		499	our @CB_TYPE = (); # registry for type (cf-object class) based events
		500	our @CB_MAP = ();
		501
		502	my %attachment;
		503
		504	sub _attach_cb($$$$) {
		505	my ($registry, $event, $prio, $cb) = @_;
		506
		507	use sort 'stable';
		508
		509	$cb = [$prio, $cb];
		510
		511	@{$registry->[$event]} = sort
		512	{ $a->[0] cmp $b->[0] }
		513	@{$registry->[$event] || []}, $cb;
		514	}
		515
		516	# hack
		517	my %attachable_klass = map +($_ => 1), KLASS_OBJECT, KLASS_CLIENT, KLASS_PLAYER, KLASS_MAP;
		518
		519	# attach handles attaching event callbacks
		520	# the only thing the caller has to do is pass the correct
		521	# registry (== where the callback attaches to).
		522	sub _attach {
		523	my ($registry, $klass, @arg) = @_;
		524
		525	my $object_type;
		526	my $prio = 0;
		527	my %cb_id = map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == $klass, 0 .. $#EVENT;
		528
		529	#TODO: get rid of this hack
		530	if ($attachable_klass{$klass}) {
		531	%cb_id = (%cb_id, map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == KLASS_ATTACHABLE, 0 .. $#EVENT);
		532	}
		533
		534	while (@arg) {
		535	my $type = shift @arg;
		536
		537	if ($type eq "prio") {
		538	$prio = shift @arg;
		539
		540	} elsif ($type eq "type") {
		541	$object_type = shift @arg;
		542	$registry = $CB_TYPE[$object_type] ||= [];
		543
		544	} elsif ($type eq "subtype") {
		545	defined $object_type or Carp::croak "subtype specified without type";
		546	my $object_subtype = shift @arg;
		547	$registry = $CB_TYPE[$object_type + $object_subtype * NUM_SUBTYPES] ||= [];
		548
		549	} elsif ($type eq "package") {
		550	my $pkg = shift @arg;
		551
		552	while (my ($name, $id) = each %cb_id) {
		553	if (my $cb = $pkg->can ($name)) {
		554	_attach_cb $registry, $id, $prio, $cb;
		555	}
		556	}
		557
		558	} elsif (exists $cb_id{$type}) {
		559	_attach_cb $registry, $cb_id{$type}, $prio, shift @arg;
		560
		561	} elsif (ref $type) {
		562	warn "attaching objects not supported, ignoring.\n";
		563
		564	} else {
		565	shift @arg;
		566	warn "attach argument '$type' not supported, ignoring.\n";
		567	}
		568	}
		569	}
		570
		571	sub _object_attach {
		572	my ($obj, $name, %arg) = @_;
		573
		574	return if exists $obj->{_attachment}{$name};
		575
		576	if (my $attach = $attachment{$name}) {
		577	my $registry = $obj->registry;
		578
		579	for (@$attach) {
		580	my ($klass, @attach) = @$_;
		581	_attach $registry, $klass, @attach;
		582	}
		583
		584	$obj->{$name} = \%arg;
		585	} else {
		586	warn "object uses attachment '$name' that is not available, postponing.\n";
		587	}
		588
		589	$obj->{_attachment}{$name} = undef;
		590	}
		591
		592	sub cf::attachable::attach {
		593	if (ref $_[0]) {
		594	_object_attach @_;
		595	} else {
		596	_attach shift->_attach_registry, @_;
		597	}
		598	};
		599
		600	# all those should be optimised
		601	sub cf::attachable::detach {
		602	my ($obj, $name) = @_;
		603
		604	if (ref $obj) {
		605	delete $obj->{_attachment}{$name};
		606	reattach ($obj);
		607	} else {
		608	Carp::croak "cannot, currently, detach class attachments";
		609	}
		610	};
		611
		612	sub cf::attachable::attached {
		613	my ($obj, $name) = @_;
		614
		615	exists $obj->{_attachment}{$name}
		616	}
		617
		618	for my $klass (qw(ATTACHABLE GLOBAL OBJECT PLAYER CLIENT MAP)) {
		619	eval "#line " . __LINE__ . " 'cf.pm'
		620	sub cf::\L$klass\E::_attach_registry {
		621	(\\\@CB_$klass, KLASS_$klass)
		622	}
		623
		624	sub cf::\L$klass\E::attachment {
		625	my \$name = shift;
		626
		627	\$attachment{\$name} = [[KLASS_$klass, \@_]];
		628	}
		629	";
		630	die if $@;
		631	}
		632
		633	our $override;
		634	our @invoke_results = (); # referenced from .xs code. TODO: play tricks with reify and mortals?
		635
		636	sub override {
		637	$override = 1;
		638	@invoke_results = ();
		639	}
		640
		641	sub do_invoke {
		642	my $event = shift;
		643	my $callbacks = shift;
		644
		645	@invoke_results = ();
		646
		647	local $override;
		648
		649	for (@$callbacks) {
		650	eval { &{$_->[1]} };
		651
		652	if ($@) {
		653	warn "$@";
		654	warn "... while processing $EVENT[$event][0](@_) event, skipping processing altogether.\n";
		655	override;
		656	}
		657
		658	return 1 if $override;
		659	}
		660
		661	0
		662	}
		663
		664	=item $bool = cf::global::invoke (EVENT_CLASS_XXX, ...)
		665
		666	=item $bool = $attachable->invoke (EVENT_CLASS_XXX, ...)
		667
		668	Generate an object-specific event with the given arguments.
		669
		670	This API is preliminary (most likely, the EVENT_CLASS_xxx prefix will be
		671	removed in future versions), and there is no public API to access override
		672	results (if you must, access C<@cf::invoke_results> directly).
		673
		674	=back
		675
		676	=cut
		677
		678	#############################################################################
		679	# object support
		680
		681	sub reattach {
		682	# basically do the same as instantiate, without calling instantiate
		683	my ($obj) = @_;
		684
		685	my $registry = $obj->registry;
		686
		687	@$registry = ();
		688
		689	delete $obj->{_attachment} unless scalar keys %{ $obj->{_attachment} || {} };
		690
		691	for my $name (keys %{ $obj->{_attachment} || {} }) {
		692	if (my $attach = $attachment{$name}) {
		693	for (@$attach) {
		694	my ($klass, @attach) = @$_;
		695	_attach $registry, $klass, @attach;
		696	}
		697	} else {
		698	warn "object uses attachment '$name' that is not available, postponing.\n";
		699	}
		700	}
		701	}
		702
		703	cf::attachable->attach (
		704	prio => -1000000,
		705	on_instantiate => sub {
		706	my ($obj, $data) = @_;
		707
		708	$data = from_json $data;
		709
		710	for (@$data) {
		711	my ($name, $args) = @$_;
		712
		713	$obj->attach ($name, %{$args || {} });
		714	}
		715	},
		716	on_reattach => \&reattach,
		717	on_clone => sub {
		718	my ($src, $dst) = @_;
		719
		720	@{$dst->registry} = @{$src->registry};
		721
		722	%$dst = %$src;
		723
		724	%{$dst->{_attachment}} = %{$src->{_attachment}}
		725	if exists $src->{_attachment};
		726	},
		727	);
		728
		729	sub object_freezer_save {
		730	my ($filename, $rdata, $objs) = @_;
		731
		732	sync_job {
		733	if (length $$rdata) {
		734	warn sprintf "saving %s (%d,%d)\n",
		735	$filename, length $$rdata, scalar @$objs;
		736
		737	if (my $fh = aio_open "$filename~", O_WRONLY | O_CREAT, 0600) {
		738	chmod SAVE_MODE, $fh;
		739	aio_write $fh, 0, (length $$rdata), $$rdata, 0;
		740	aio_fsync $fh;
		741	close $fh;
		742
		743	if (@$objs) {
		744	if (my $fh = aio_open "$filename.pst~", O_WRONLY | O_CREAT, 0600) {
		745	chmod SAVE_MODE, $fh;
		746	my $data = Storable::nfreeze { version => 1, objs => $objs };
		747	aio_write $fh, 0, (length $data), $data, 0;
		748	aio_fsync $fh;
		749	close $fh;
		750	aio_rename "$filename.pst~", "$filename.pst";
		751	}
		752	} else {
		753	aio_unlink "$filename.pst";
		754	}
		755
		756	aio_rename "$filename~", $filename;
		757	} else {
		758	warn "FATAL: $filename~: $!\n";
		759	}
		760	} else {
		761	aio_unlink $filename;
		762	aio_unlink "$filename.pst";
		763	}
		764	}
		765	}
		766
		767	sub object_freezer_as_string {
		768	my ($rdata, $objs) = @_;
		769
		770	use Data::Dumper;
		771
		772	$$rdata . Dumper $objs
		773	}
		774
		775	sub object_thawer_load {
		776	my ($filename) = @_;
		777
		778	my ($data, $av);
		779
		780	(aio_load $filename, $data) >= 0
		781	or return;
		782
		783	unless (aio_stat "$filename.pst") {
		784	(aio_load "$filename.pst", $av) >= 0
		785	or return;
		786	$av = eval { (Storable::thaw $av)->{objs} };
		787	}
		788
		789	warn sprintf "loading %s (%d)\n",
		790	$filename, length $data, scalar @{$av || []};#d#
		791	return ($data, $av);
		792	}
		793
		794	#############################################################################
		795	# command handling &c
		796
		797	=item cf::register_command $name => \&callback($ob,$args);
		798
		799	Register a callback for execution when the client sends the user command
		800	$name.
		801
		802	=cut
97		803
98	sub register_command {	804	sub register_command {
99	my ($name, $time, $cb) = @_;	805	my ($name, $cb) = @_;
100		806
101	my $caller = caller;	807	my $caller = caller;
102
103	warn "registering command '$name/$time' to '$caller'";	808	#warn "registering command '$name/$time' to '$caller'";
104		809
105	push @{ $command{$name} }, [$time, $cb, $caller];	810	push @{ $COMMAND{$name} }, [$caller, $cb];
106	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @{ $command{$name} };
107	}	811	}
		812
		813	=item cf::register_extcmd $name => \&callback($pl,$packet);
		814
		815	Register a callbackf ro execution when the client sends an extcmd packet.
		816
		817	If the callback returns something, it is sent back as if reply was being
		818	called.
		819
		820	=cut
		821
		822	sub register_extcmd {
		823	my ($name, $cb) = @_;
		824
		825	$EXTCMD{$name} = $cb;
		826	}
		827
		828	cf::player->attach (
		829	on_command => sub {
		830	my ($pl, $name, $params) = @_;
		831
		832	my $cb = $COMMAND{$name}
		833	or return;
		834
		835	for my $cmd (@$cb) {
		836	$cmd->[1]->($pl->ob, $params);
		837	}
		838
		839	cf::override;
		840	},
		841	on_extcmd => sub {
		842	my ($pl, $buf) = @_;
		843
		844	my $msg = eval { from_json $buf };
		845
		846	if (ref $msg) {
		847	if (my $cb = $EXTCMD{$msg->{msgtype}}) {
		848	if (my %reply = $cb->($pl, $msg)) {
		849	$pl->ext_reply ($msg->{msgid}, %reply);
		850	}
		851	}
		852	} else {
		853	warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";
		854	}
		855
		856	cf::override;
		857	},
		858	);
108		859
109	sub load_extension {	860	sub load_extension {
110	my ($path) = @_;	861	my ($path) = @_;
111		862
112	$path =~ /([^\/\\]+)\.ext$/ or die "$path";	863	$path =~ /([^\/\\]+)\.ext$/ or die "$path";
113	my $base = $1;	864	my $base = $1;
114	my $pkg = $1;	865	my $pkg = $1;
115	$pkg =~ s/[^[:word:]]/_/g;	866	$pkg =~ s/[^[:word:]]/_/g;
116	$pkg = "cf::ext::$pkg";	867	$pkg = "ext::$pkg";
117		868
118	warn "loading '$path' into '$pkg'\n";	869	warn "... loading '$path' into '$pkg'\n";
119		870
120	open my $fh, "<:utf8", $path	871	open my $fh, "<:utf8", $path
121	or die "$path: $!";	872	or die "$path: $!";
122		873
123	my $source =	874	my $source =
124	"package $pkg; use strict; use utf8;\n"	875	"package $pkg; use strict; use utf8;\n"
125	. "#line 1 \"$path\"\n{\n"	876	. "#line 1 \"$path\"\n{\n"
126	. (do { local $/; <$fh> })	877	. (do { local $/; <$fh> })
127	. "\n};\n1";	878	. "\n};\n1";
128		879
129	eval $source	880	unless (eval $source) {
130	or die "$path: $@";	881	my $msg = $@ ? "$path: $@\n"
		882	: "extension disabled.\n";
		883	if ($source =~ /^#!.*perl.*#.*MANDATORY/m) { # ugly match
		884	warn $@;
		885	warn "mandatory extension failed to load, exiting.\n";
		886	exit 1;
		887	}
		888	die $@;
		889	}
131		890
132	push @exts, $pkg;	891	push @EXTS, $pkg;
133	$ext_pkg{$base} = $pkg;
134
135	no strict 'refs';
136
137	# @{"$pkg\::ISA"} = cf::ext::;
138
139	for my $idx (0 .. $#EVENT) {
140	if (my $ref = $pkg->can ("on_$EVENT[$idx]")) {
141	warn "registering $EVENT[$idx] hook\n";
142	$hook[$idx]{$base} = $ref;
143	}
144	}
145	}
146
147	sub unload_extension {
148	my ($pkg) = @_;
149
150	warn "removing extension $pkg\n";
151
152	# remove hooks
153	for my $idx (0 .. $#EVENT) {
154	delete $hook[$idx]{$pkg};
155	}
156
157	# remove commands
158	for my $name (keys %command) {
159	my @cb = grep $_->[2] ne $pkg, @{ $command{$name} };
160
161	if (@cb) {
162	$command{$name} = \@cb;
163	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @cb;
164	} else {
165	delete $command{$name};
166	delete $COMMAND{"$name\000"};
167	}
168	}
169
170	Symbol::delete_package $pkg;
171	}	892	}
172		893
173	sub load_extensions {	894	sub load_extensions {
174	my $LIBDIR = maps_directory "perl";
175
176	for my $ext (<$LIBDIR/*.ext>) {	895	for my $ext (<$LIBDIR/*.ext>) {
177	next unless -r $ext;	896	next unless -r $ext;
178	eval {	897	eval {
179	load_extension $ext;	898	load_extension $ext;
180	1	899	1
181	} or warn "$ext not loaded: $@";	900	} or warn "$ext not loaded: $@";
182	}	901	}
183	}	902	}
184		903
185	register_command "perl-reload", 0, sub {	904	#############################################################################
		905	# load/save/clean perl data associated with a map
		906
		907	*cf::mapsupport::on_clean = sub {
		908	my ($map) = @_;
		909
		910	my $path = $map->tmpname;
		911	defined $path or return;
		912
		913	unlink "$path.pst";
		914	};
		915
		916	cf::map->attach (prio => -10000, package => cf::mapsupport::);
		917
		918	#############################################################################
		919
		920	=head2 CORE EXTENSIONS
		921
		922	Functions and methods that extend core crossfire objects.
		923
		924	=cut
		925
		926	package cf::player;
		927
		928	use Coro::AIO;
		929
		930	=head3 cf::player
		931
		932	=over 4
		933
		934	=item cf::player::find $login
		935
		936	Returns the given player object, loading it if necessary (might block).
		937
		938	=cut
		939
		940	sub playerdir($) {
		941	cf::localdir
		942	. "/"
		943	. cf::playerdir
		944	. "/"
		945	. (ref $_[0] ? $_[0]->ob->name : $_[0])
		946	}
		947
		948	sub path($) {
		949	my $login = ref $_[0] ? $_[0]->ob->name : $_[0];
		950
		951	(playerdir $login) . "/$login.pl"
		952	}
		953
		954	sub find_active($) {
		955	$cf::PLAYER{$_[0]}
		956	and $cf::PLAYER{$_[0]}->active
		957	and $cf::PLAYER{$_[0]}
		958	}
		959
		960	sub exists($) {
		961	my ($login) = @_;
		962
		963	$cf::PLAYER{$login}
		964	or cf::sync_job { !aio_stat $login }
		965	}
		966
		967	sub find($) {
		968	return $cf::PLAYER{$_[0]} || do {
		969	my $login = $_[0];
		970
		971	my $guard = cf::lock_acquire "user_find:$login";
		972
		973	$cf::PLAYER{$_[0]} || do {
		974	my $pl = load_pl path $login
		975	or return;
		976	$cf::PLAYER{$login} = $pl
		977	}
		978	}
		979	}
		980
		981	sub save($) {
		982	my ($pl) = @_;
		983
		984	return if $pl->{deny_save};
		985
		986	my $path = path $pl;
		987	my $guard = cf::lock_acquire "user_save:$path";
		988
		989	return if $pl->{deny_save};
		990
		991	aio_mkdir playerdir $pl, 0770;
		992	$pl->{last_save} = $cf::RUNTIME;
		993
		994	$pl->save_pl ($path);
		995	Coro::cede;
		996	}
		997
		998	sub new($) {
		999	my ($login) = @_;
		1000
		1001	my $self = create;
		1002
		1003	$self->ob->name ($login);
		1004	$self->{deny_save} = 1;
		1005
		1006	$cf::PLAYER{$login} = $self;
		1007
		1008	$self
		1009	}
		1010
		1011	=item $pl->quit_character
		1012
		1013	Nukes the player without looking back. If logged in, the connection will
		1014	be destroyed. May block for a long time.
		1015
		1016	=cut
		1017
		1018	sub quit_character {
		1019	my ($pl) = @_;
		1020
		1021	$pl->{deny_save} = 1;
		1022	$pl->password ("*"); # this should lock out the player until we nuked the dir
		1023
		1024	$pl->invoke (cf::EVENT_PLAYER_LOGOUT, 1) if $pl->active;
		1025	$pl->deactivate;
		1026	$pl->invoke (cf::EVENT_PLAYER_QUIT);
		1027	$pl->ns->destroy if $pl->ns;
		1028
		1029	my $path = playerdir $pl;
		1030	my $temp = "$path~$cf::RUNTIME~deleting~";
		1031	aio_rename $path, $temp;
		1032	delete $cf::PLAYER{$pl->ob->name};
		1033	$pl->destroy;
		1034	IO::AIO::aio_rmtree $temp;
		1035	}
		1036
		1037	=item cf::player::list_logins
		1038
		1039	Returns am arrayref of all valid playernames in the system, can take a
		1040	while and may block, so not sync_job-capable, ever.
		1041
		1042	=cut
		1043
		1044	sub list_logins {
		1045	my $dirs = aio_readdir cf::localdir . "/" . cf::playerdir
		1046	or return [];
		1047
		1048	my @logins;
		1049
		1050	for my $login (@$dirs) {
		1051	my $fh = aio_open path $login, Fcntl::O_RDONLY, 0 or next;
		1052	aio_read $fh, 0, 512, my $buf, 0 or next;
		1053	$buf !~ /^password -------------$/m or next; # official not-valid tag
		1054
		1055	utf8::decode $login;
		1056	push @logins, $login;
		1057	}
		1058
		1059	\@logins
		1060	}
		1061
		1062	=item $player->maps
		1063
		1064	Returns an arrayref of map paths that are private for this
		1065	player. May block.
		1066
		1067	=cut
		1068
		1069	sub maps($) {
		1070	my ($pl) = @_;
		1071
		1072	my $files = aio_readdir playerdir $pl
		1073	or return;
		1074
		1075	my @paths;
		1076
		1077	for (@$files) {
		1078	utf8::decode $_;
		1079	next if /\.(?:pl|pst)$/;
		1080	next unless /^$PATH_SEP/o;
		1081
		1082	push @paths, "~" . $pl->ob->name . "/" . $_;
		1083	}
		1084
		1085	\@paths
		1086	}
		1087
		1088	=item $player->ext_reply ($msgid, $msgtype, %msg)
		1089
		1090	Sends an ext reply to the player.
		1091
		1092	=cut
		1093
		1094	sub ext_reply($$$%) {
		1095	my ($self, $id, %msg) = @_;
		1096
		1097	$msg{msgid} = $id;
		1098
		1099	$self->send ("ext " . cf::to_json \%msg);
		1100	}
		1101
		1102	package cf;
		1103
		1104	=back
		1105
		1106
		1107	=head3 cf::map
		1108
		1109	=over 4
		1110
		1111	=cut
		1112
		1113	package cf::map;
		1114
		1115	use Fcntl;
		1116	use Coro::AIO;
		1117
		1118	use overload
		1119	'""' => \&as_string;
		1120
		1121	our $MAX_RESET = 3600;
		1122	our $DEFAULT_RESET = 3000;
		1123
		1124	sub generate_random_map {
		1125	my ($self, $rmp) = @_;
		1126
		1127	# mit "rum" bekleckern, nicht
		1128	$self->_create_random_map (
		1129	$rmp->{wallstyle}, $rmp->{wall_name}, $rmp->{floorstyle}, $rmp->{monsterstyle},
		1130	$rmp->{treasurestyle}, $rmp->{layoutstyle}, $rmp->{doorstyle}, $rmp->{decorstyle},
		1131	$rmp->{origin_map}, $rmp->{final_map}, $rmp->{exitstyle}, $rmp->{this_map},
		1132	$rmp->{exit_on_final_map},
		1133	$rmp->{xsize}, $rmp->{ysize},
		1134	$rmp->{expand2x}, $rmp->{layoutoptions1}, $rmp->{layoutoptions2}, $rmp->{layoutoptions3},
		1135	$rmp->{symmetry}, $rmp->{difficulty}, $rmp->{difficulty_given}, $rmp->{difficulty_increase},
		1136	$rmp->{dungeon_level}, $rmp->{dungeon_depth}, $rmp->{decoroptions}, $rmp->{orientation},
		1137	$rmp->{origin_y}, $rmp->{origin_x}, $rmp->{random_seed}, $rmp->{total_map_hp},
		1138	$rmp->{map_layout_style}, $rmp->{treasureoptions}, $rmp->{symmetry_used},
		1139	(cf::region::find $rmp->{region}), $rmp->{custom}
		1140	)
		1141	}
		1142
		1143	sub register {
		1144	my (undef, $regex) = @_;
		1145	my $pkg = caller;
		1146
		1147	no strict;
		1148	push @{"$pkg\::ISA"}, __PACKAGE__;
		1149
		1150	$EXT_MAP{$pkg} = qr<$regex>;
		1151	}
		1152
		1153	# also paths starting with '/'
		1154	$EXT_MAP{"cf::map"} = qr{^(?=/)};
		1155
		1156	sub normalise {
186	my ($who, $arg) = @_;	1157	my ($path, $base) = @_;
187		1158
188	if ($who->flag (FLAG_WIZ)) {	1159	# map plan:
189	$who->message ("reloading...");	1160	#
		1161	# /! non-realised random map exit (special hack!)
		1162	# {... are special paths that are not being touched
		1163	# ?xxx/... are special absolute paths
		1164	# ?random/... random maps
		1165	# /... normal maps
		1166	# ~user/... per-player map of a specific user
190		1167
191	warn "reloading...\n";	1168	$path =~ s/$PATH_SEP/\//go;
		1169
		1170	# treat it as relative path if it starts with
		1171	# something that looks reasonable
		1172	if ($path =~ m{^(?:\./|\.\./|\w)}) {
		1173	$base or Carp::carp "normalise called with relative path and no base: '$path'";
		1174
		1175	$base =~ s{[^/]+/?$}{};
		1176	$path = "$base/$path";
		1177	}
		1178
		1179	for ($path) {
		1180	redo if s{//}{/};
		1181	redo if s{/\.?/}{/};
		1182	redo if s{/[^/]+/\.\./}{/};
		1183	}
		1184
		1185	$path
		1186	}
		1187
		1188	sub new_from_path {
		1189	my (undef, $path, $base) = @_;
		1190
		1191	return $path if UNIVERSAL::isa $path, "cf::map"; # already a map object
		1192
		1193	$path = normalise $path, $base;
		1194
		1195	for my $pkg (keys %EXT_MAP) {
		1196	if ($path =~ $EXT_MAP{$pkg}) {
		1197	my $self = bless cf::map::new, $pkg;
		1198	$self->{path} = $path; $self->path ($path);
		1199	$self->init; # pass $1 etc.
		1200	return $self;
		1201	}
		1202	}
		1203
		1204	Carp::carp "unable to resolve path '$path'.";
		1205	()
		1206	}
		1207
		1208	sub init {
		1209	my ($self) = @_;
		1210
		1211	$self
		1212	}
		1213
		1214	sub as_string {
		1215	my ($self) = @_;
		1216
		1217	"$self->{path}"
		1218	}
		1219
		1220	# the displayed name, this is a one way mapping
		1221	sub visible_name {
		1222	&as_string
		1223	}
		1224
		1225	# escape the /'s in the path
		1226	sub _escaped_path {
		1227	(my $path = $_[0]{path}) =~ s/\//$PATH_SEP/g;
		1228
		1229	$path
		1230	}
		1231
		1232	# the original (read-only) location
		1233	sub load_path {
		1234	my ($self) = @_;
		1235
		1236	sprintf "%s/%s/%s", cf::datadir, cf::mapdir, $self->{path}
		1237	}
		1238
		1239	# the temporary/swap location
		1240	sub save_path {
		1241	my ($self) = @_;
		1242
		1243	sprintf "%s/%s/%s.map", cf::localdir, cf::tmpdir, $self->_escaped_path
		1244	}
		1245
		1246	# the unique path, undef == no special unique path
		1247	sub uniq_path {
		1248	my ($self) = @_;
		1249
		1250	sprintf "%s/%s/%s", cf::localdir, cf::uniquedir, $self->_escaped_path
		1251	}
		1252
		1253	# and all this just because we cannot iterate over
		1254	# all maps in C++...
		1255	sub change_all_map_light {
		1256	my ($change) = @_;
		1257
		1258	$_->change_map_light ($change)
		1259	for grep $_->outdoor, values %cf::MAP;
		1260	}
		1261
		1262	sub unlink_save {
		1263	my ($self) = @_;
		1264
		1265	utf8::encode (my $save = $self->save_path);
		1266	IO::AIO::aioreq_pri 4; IO::AIO::aio_unlink $save;
		1267	IO::AIO::aioreq_pri 4; IO::AIO::aio_unlink "$save.pst";
		1268	}
		1269
		1270	sub load_header_from($) {
		1271	my ($self, $path) = @_;
		1272
		1273	utf8::encode $path;
		1274	aio_open $path, O_RDONLY, 0
		1275	or return;
		1276
		1277	$self->_load_header ($path)
		1278	or return;
		1279
		1280	$self->{load_path} = $path;
		1281
		1282	1
		1283	}
		1284
		1285	sub load_orig {
		1286	my ($self) = @_;
		1287
		1288	$self->load_header_from ($self->load_path)
		1289	}
		1290
		1291	sub load_temp {
		1292	my ($self) = @_;
		1293
		1294	$self->load_header_from ($self->save_path)
		1295	}
		1296
		1297	sub load_header {
		1298	my ($self) = @_;
		1299
		1300	if ($self->load_temp) {
		1301	$self->last_access ((delete $self->{last_access})
		1302	|| $cf::RUNTIME); #d#
		1303	# safety
		1304	$self->{instantiate_time} = $cf::RUNTIME
		1305	if $self->{instantiate_time} > $cf::RUNTIME;
		1306	} else {
		1307	$self->load_orig
		1308	or return;
		1309
		1310	$self->{load_original} = 1;
		1311	$self->{instantiate_time} = $cf::RUNTIME;
		1312	$self->last_access ($cf::RUNTIME);
		1313	$self->instantiate;
		1314	}
		1315
		1316	1
		1317	}
		1318
		1319	sub find;
		1320	sub find {
		1321	my ($path, $origin) = @_;
		1322
		1323	$path = normalise $path, $origin && $origin->path;
		1324
		1325	cf::lock_wait "map_find:$path";
		1326
		1327	$cf::MAP{$path} || do {
		1328	my $guard = cf::lock_acquire "map_find:$path";
		1329	my $map = new_from_path cf::map $path
		1330	or return;
		1331
		1332	$map->{last_save} = $cf::RUNTIME;
		1333
		1334	$map->load_header
		1335	or return;
		1336
		1337	if ($map->should_reset) {
		1338	$map->reset;
		1339	undef $guard;
		1340	$map = find $path
		1341	or return;
		1342	}
		1343
		1344	$cf::MAP{$path} = $map
		1345	}
		1346	}
		1347
		1348	sub load {
		1349	my ($self) = @_;
		1350
		1351	my $path = $self->{path};
		1352	my $guard = cf::lock_acquire "map_load:$path";
		1353
		1354	return if $self->in_memory != cf::MAP_SWAPPED;
		1355
		1356	$self->in_memory (cf::MAP_LOADING);
		1357
		1358	$self->alloc;
		1359	$self->_load_objects ($self->{load_path}, 1)
		1360	or return;
		1361
		1362	$self->set_object_flag (cf::FLAG_OBJ_ORIGINAL, 1)
		1363	if delete $self->{load_original};
		1364
		1365	if (my $uniq = $self->uniq_path) {
		1366	utf8::encode $uniq;
		1367	if (aio_open $uniq, O_RDONLY, 0) {
		1368	$self->clear_unique_items;
		1369	$self->_load_objects ($uniq, 0);
		1370	}
		1371	}
		1372
		1373	Coro::cede;
		1374
		1375	# now do the right thing for maps
		1376	$self->link_multipart_objects;
		1377
		1378	unless ($self->{deny_activate}) {
		1379	$self->decay_objects;
		1380	$self->fix_auto_apply;
		1381	$self->update_buttons;
		1382	Coro::cede;
		1383	$self->set_darkness_map;
		1384	$self->difficulty ($self->estimate_difficulty)
		1385	unless $self->difficulty;
		1386	Coro::cede;
		1387	$self->activate;
		1388	}
		1389
		1390	$self->in_memory (cf::MAP_IN_MEMORY);
		1391	}
		1392
		1393	sub customise_for {
		1394	my ($self, $ob) = @_;
		1395
		1396	return find "~" . $ob->name . "/" . $self->{path}
		1397	if $self->per_player;
		1398
		1399	$self
		1400	}
		1401
		1402	# find and load all maps in the 3x3 area around a map
		1403	sub load_diag {
		1404	my ($map) = @_;
		1405
		1406	my @diag; # diagonal neighbours
		1407
		1408	for (0 .. 3) {
		1409	my $neigh = $map->tile_path ($_)
		1410	or next;
		1411	$neigh = find $neigh, $map
		1412	or next;
		1413	$neigh->load;
		1414
		1415	push @diag, [$neigh->tile_path (($_ + 3) % 4), $neigh],
		1416	[$neigh->tile_path (($_ + 1) % 4), $neigh];
		1417	}
		1418
		1419	for (@diag) {
		1420	my $neigh = find @$_
		1421	or next;
		1422	$neigh->load;
		1423	}
		1424	}
		1425
		1426	sub find_sync {
		1427	my ($path, $origin) = @_;
		1428
		1429	cf::sync_job { find $path, $origin }
		1430	}
		1431
		1432	sub do_load_sync {
		1433	my ($map) = @_;
		1434
		1435	cf::sync_job { $map->load };
		1436	}
		1437
		1438	our %MAP_PREFETCH;
		1439	our $MAP_PREFETCHER = Coro::async {
		1440	while () {
		1441	for my $path (keys %MAP_PREFETCH) {
		1442	my $map = find $path
		1443	or next;
		1444	$map->load;
		1445
		1446	delete $MAP_PREFETCH{$path};
		1447	}
		1448	Coro::schedule;
		1449	}
		1450	};
		1451
		1452	sub find_async {
		1453	my ($path, $origin) = @_;
		1454
		1455	$path = normalise $path, $origin && $origin->{path};
		1456
		1457	if (my $map = $cf::MAP{$path}) {
		1458	return $map if $map->in_memory == cf::MAP_IN_MEMORY;
		1459	}
		1460
		1461	$MAP_PREFETCH{$path} = 0;
		1462	$MAP_PREFETCHER->ready;
		1463
		1464	()
		1465	}
		1466
		1467	sub save {
		1468	my ($self) = @_;
		1469
		1470	my $lock = cf::lock_acquire "map_data:" . $self->path;
		1471
		1472	$self->{last_save} = $cf::RUNTIME;
		1473
		1474	return unless $self->dirty;
		1475
		1476	my $save = $self->save_path; utf8::encode $save;
		1477	my $uniq = $self->uniq_path; utf8::encode $uniq;
		1478
		1479	$self->{load_path} = $save;
		1480
		1481	return if $self->{deny_save};
		1482
		1483	local $self->{last_access} = $self->last_access;#d#
		1484
		1485	cf::async {
		1486	$_->contr->save for $self->players;
		1487	};
		1488
		1489	if ($uniq) {
		1490	$self->_save_objects ($save, cf::IO_HEADER | cf::IO_OBJECTS);
		1491	$self->_save_objects ($uniq, cf::IO_UNIQUES);
		1492	} else {
		1493	$self->_save_objects ($save, cf::IO_HEADER | cf::IO_OBJECTS | cf::IO_UNIQUES);
		1494	}
		1495	}
		1496
		1497	sub swap_out {
		1498	my ($self) = @_;
		1499
		1500	# save first because save cedes
		1501	$self->save;
		1502
		1503	my $lock = cf::lock_acquire "map_data:" . $self->path;
		1504
		1505	return if $self->players;
		1506	return if $self->in_memory != cf::MAP_IN_MEMORY;
		1507	return if $self->{deny_save};
		1508
		1509	$self->clear;
		1510	$self->in_memory (cf::MAP_SWAPPED);
		1511	}
		1512
		1513	sub reset_at {
		1514	my ($self) = @_;
		1515
		1516	# TODO: safety, remove and allow resettable per-player maps
		1517	return 1e99 if $self->isa ("ext::map_per_player");
		1518	return 1e99 if $self->{deny_reset};
		1519
		1520	my $time = $self->fixed_resettime ? $self->{instantiate_time} : $self->last_access;
		1521	my $to = List::Util::min $MAX_RESET, $self->reset_timeout || $DEFAULT_RESET;
		1522
		1523	$time + $to
		1524	}
		1525
		1526	sub should_reset {
		1527	my ($self) = @_;
		1528
		1529	$self->reset_at <= $cf::RUNTIME
		1530	}
		1531
		1532	sub rename {
		1533	my ($self, $new_path) = @_;
		1534
		1535	normalise $new_path;
		1536
		1537	$self->unlink_save;
		1538
		1539	delete $cf::MAP{$self->path};
		1540	$self->{path} = $new_path; $self->path ($self->{path});
		1541	$cf::MAP{$self->path} = $self;
		1542
		1543	$self->save;
		1544	}
		1545
		1546	sub reset {
		1547	my ($self) = @_;
		1548
		1549	my $lock = cf::lock_acquire "map_data:" . $self->path;
		1550
		1551	return if $self->players;
		1552	return if $self->isa ("ext::map_per_player");#d#
		1553
		1554	warn "resetting map ", $self->path;#d#
		1555
		1556	delete $cf::MAP{$self->path};
		1557
		1558	$_->clear_links_to ($self) for values %cf::MAP;
		1559
		1560	$self->unlink_save;
		1561	$self->destroy;
		1562	}
		1563
		1564	my $nuke_counter = "aaaa";
		1565
		1566	sub nuke {
		1567	my ($self) = @_;
		1568
		1569	$self->{deny_save} = 1;
		1570	$self->reset_timeout (1);
		1571	$self->rename ("{nuke}/" . ($nuke_counter++));
		1572	$self->reset; # polite request, might not happen
		1573	}
		1574
		1575	=item cf::map::unique_maps
		1576
		1577	Returns an arrayref of paths of all shared maps that have
		1578	instantiated unique items. May block.
		1579
		1580	=cut
		1581
		1582	sub unique_maps() {
		1583	my $files = aio_readdir cf::localdir . "/" . cf::uniquedir
		1584	or return;
		1585
		1586	my @paths;
		1587
		1588	for (@$files) {
		1589	utf8::decode $_;
		1590	next if /\.pst$/;
		1591	next unless /^$PATH_SEP/o;
		1592
		1593	push @paths, $_;
		1594	}
		1595
		1596	\@paths
		1597	}
		1598
		1599	package cf;
		1600
		1601	=back
		1602
		1603	=head3 cf::object
		1604
		1605	=cut
		1606
		1607	package cf::object;
		1608
		1609	=over 4
		1610
		1611	=item $ob->inv_recursive
		1612
		1613	Returns the inventory of the object _and_ their inventories, recursively.
		1614
		1615	=cut
		1616
		1617	sub inv_recursive_;
		1618	sub inv_recursive_ {
		1619	map { $_, inv_recursive_ $_->inv } @_
		1620	}
		1621
		1622	sub inv_recursive {
		1623	inv_recursive_ inv $_[0]
		1624	}
		1625
		1626	package cf;
		1627
		1628	=back
		1629
		1630	=head3 cf::object::player
		1631
		1632	=over 4
		1633
		1634	=item $player_object->reply ($npc, $msg[, $flags])
		1635
		1636	Sends a message to the player, as if the npc C<$npc> replied. C<$npc>
		1637	can be C<undef>. Does the right thing when the player is currently in a
		1638	dialogue with the given NPC character.
		1639
		1640	=cut
		1641
		1642	# rough implementation of a future "reply" method that works
		1643	# with dialog boxes.
		1644	#TODO: the first argument must go, split into a $npc->reply_to ( method
		1645	sub cf::object::player::reply($$$;$) {
		1646	my ($self, $npc, $msg, $flags) = @_;
		1647
		1648	$flags = cf::NDI_BROWN | cf::NDI_UNIQUE unless @_ >= 4;
		1649
		1650	if ($self->{record_replies}) {
		1651	push @{ $self->{record_replies} }, [$npc, $msg, $flags];
		1652	} else {
		1653	$msg = $npc->name . " says: $msg" if $npc;
		1654	$self->message ($msg, $flags);
		1655	}
		1656	}
		1657
		1658	=item $player_object->may ("access")
		1659
		1660	Returns wether the given player is authorized to access resource "access"
		1661	(e.g. "command_wizcast").
		1662
		1663	=cut
		1664
		1665	sub cf::object::player::may {
		1666	my ($self, $access) = @_;
		1667
		1668	$self->flag (cf::FLAG_WIZ) ||
		1669	(ref $cf::CFG{"may_$access"}
		1670	? scalar grep $self->name eq $_, @{$cf::CFG{"may_$access"}}
		1671	: $cf::CFG{"may_$access"})
		1672	}
		1673
		1674	=item $player_object->enter_link
		1675
		1676	Freezes the player and moves him/her to a special map (C<{link}>).
		1677
		1678	The player should be reasonably safe there for short amounts of time. You
		1679	I<MUST> call C<leave_link> as soon as possible, though.
		1680
		1681	Will never block.
		1682
		1683	=item $player_object->leave_link ($map, $x, $y)
		1684
		1685	Moves the player out of the special C<{link}> map onto the specified
		1686	map. If the map is not valid (or omitted), the player will be moved back
		1687	to the location he/she was before the call to C<enter_link>, or, if that
		1688	fails, to the emergency map position.
		1689
		1690	Might block.
		1691
		1692	=cut
		1693
		1694	sub link_map {
		1695	unless ($LINK_MAP) {
		1696	$LINK_MAP = cf::map::find "{link}"
		1697	or do { warn "FATAL: unable to provide {link} map, exiting."; exit 1 };
		1698	$LINK_MAP->load;
		1699	}
		1700
		1701	$LINK_MAP
		1702	}
		1703
		1704	sub cf::object::player::enter_link {
		1705	my ($self) = @_;
		1706
		1707	$self->deactivate_recursive;
		1708
		1709	return if UNIVERSAL::isa $self->map, "ext::map_link";
		1710
		1711	$self->{_link_pos} ||= [$self->map->{path}, $self->x, $self->y]
		1712	if $self->map;
		1713
		1714	$self->enter_map ($LINK_MAP || link_map, 20, 20);
		1715	}
		1716
		1717	sub cf::object::player::leave_link {
		1718	my ($self, $map, $x, $y) = @_;
		1719
		1720	my $link_pos = delete $self->{_link_pos};
		1721
		1722	unless ($map) {
		1723	# restore original map position
		1724	($map, $x, $y) = @{ $link_pos || [] };
		1725	$map = cf::map::find $map;
		1726
		1727	unless ($map) {
		1728	($map, $x, $y) = @$EMERGENCY_POSITION;
		1729	$map = cf::map::find $map
		1730	or die "FATAL: cannot load emergency map\n";
		1731	}
		1732	}
		1733
		1734	($x, $y) = (-1, -1)
		1735	unless (defined $x) && (defined $y);
		1736
		1737	# use -1 or undef as default coordinates, not 0, 0
		1738	($x, $y) = ($map->enter_x, $map->enter_y)
		1739	if $x <=0 && $y <= 0;
		1740
		1741	$map->load;
		1742	$map->load_diag;
		1743
		1744	return unless $self->contr->active;
		1745	$self->activate_recursive;
		1746	$self->enter_map ($map, $x, $y);
		1747	}
		1748
		1749	cf::player->attach (
		1750	on_logout => sub {
		1751	my ($pl) = @_;
		1752
		1753	# abort map switching before logout
		1754	if ($pl->ob->{_link_pos}) {
		1755	cf::sync_job {
		1756	$pl->ob->leave_link
		1757	};
		1758	}
		1759	},
		1760	on_login => sub {
		1761	my ($pl) = @_;
		1762
		1763	# try to abort aborted map switching on player login :)
		1764	# should happen only on crashes
		1765	if ($pl->ob->{_link_pos}) {
		1766	$pl->ob->enter_link;
		1767	(async {
		1768	# we need this sleep as the login has a concurrent enter_exit running
		1769	# and this sleep increases chances of the player not ending up in scorn
		1770	$pl->ob->reply (undef,
		1771	"There was an internal problem at your last logout, "
		1772	. "the server will try to bring you to your intended destination in a second.",
		1773	cf::NDI_RED);
		1774	Coro::Timer::sleep 1;
		1775	$pl->ob->leave_link;
		1776	})->prio (2);
		1777	}
		1778	},
		1779	);
		1780
		1781	=item $player_object->goto ($path, $x, $y)
		1782
		1783	=cut
		1784
		1785	sub cf::object::player::goto {
		1786	my ($self, $path, $x, $y) = @_;
		1787
		1788	$self->enter_link;
		1789
		1790	(async {
		1791	my $map = cf::map::find $path;
		1792	$map = $map->customise_for ($self) if $map;
		1793
		1794	# warn "entering ", $map->path, " at ($x, $y)\n"
		1795	# if $map;
		1796
		1797	$map or $self->message ("The exit to '" . ($path->visible_name) . "' is closed", cf::NDI_UNIQUE | cf::NDI_RED);
		1798
		1799	$self->leave_link ($map, $x, $y);
		1800	})->prio (1);
		1801	}
		1802
		1803	=item $player_object->enter_exit ($exit_object)
		1804
		1805	=cut
		1806
		1807	sub parse_random_map_params {
		1808	my ($spec) = @_;
		1809
		1810	my $rmp = { # defaults
		1811	xsize => 10,
		1812	ysize => 10,
		1813	};
		1814
		1815	for (split /\n/, $spec) {
		1816	my ($k, $v) = split /\s+/, $_, 2;
		1817
		1818	$rmp->{lc $k} = $v if (length $k) && (length $v);
		1819	}
		1820
		1821	$rmp
		1822	}
		1823
		1824	sub prepare_random_map {
		1825	my ($exit) = @_;
		1826
		1827	# all this does is basically replace the /! path by
		1828	# a new random map path (?random/...) with a seed
		1829	# that depends on the exit object
		1830
		1831	my $rmp = parse_random_map_params $exit->msg;
		1832
		1833	if ($exit->map) {
		1834	$rmp->{region} = $exit->map->region_name;
		1835	$rmp->{origin_map} = $exit->map->path;
		1836	$rmp->{origin_x} = $exit->x;
		1837	$rmp->{origin_y} = $exit->y;
		1838	}
		1839
		1840	$rmp->{random_seed} ||= $exit->random_seed;
		1841
		1842	my $data = cf::to_json $rmp;
		1843	my $md5 = Digest::MD5::md5_hex $data;
		1844
		1845	if (my $fh = aio_open "$cf::RANDOM_MAPS/$md5.meta", O_WRONLY | O_CREAT, 0666) {
		1846	aio_write $fh, 0, (length $data), $data, 0;
		1847
		1848	$exit->slaying ("?random/$md5");
		1849	$exit->msg (undef);
		1850	}
		1851	}
		1852
		1853	sub cf::object::player::enter_exit {
		1854	my ($self, $exit) = @_;
		1855
		1856	return unless $self->type == cf::PLAYER;
		1857
		1858	$self->enter_link;
		1859
		1860	(async {
		1861	$self->deactivate_recursive; # just to be sure
		1862	unless (eval {
		1863	prepare_random_map $exit
		1864	if $exit->slaying eq "/!";
		1865
		1866	my $path = new_from_path cf::map $exit->slaying, $exit->map && $exit->map->path;
		1867	$self->goto ($path, $exit->stats->hp, $exit->stats->sp);
		1868
		1869	1;
		1870	}) {
		1871	$self->message ("Something went wrong deep within the crossfire server. "
		1872	. "I'll try to bring you back to the map you were before. "
		1873	. "Please report this to the dungeon master!",
		1874	cf::NDI_UNIQUE | cf::NDI_RED);
		1875
		1876	warn "ERROR in enter_exit: $@";
		1877	$self->leave_link;
		1878	}
		1879	})->prio (1);
		1880	}
		1881
		1882	=head3 cf::client
		1883
		1884	=over 4
		1885
		1886	=item $client->send_drawinfo ($text, $flags)
		1887
		1888	Sends a drawinfo packet to the client. Circumvents output buffering so
		1889	should not be used under normal circumstances.
		1890
		1891	=cut
		1892
		1893	sub cf::client::send_drawinfo {
		1894	my ($self, $text, $flags) = @_;
		1895
		1896	utf8::encode $text;
		1897	$self->send_packet (sprintf "drawinfo %d %s", $flags, $text);
		1898	}
		1899
		1900
		1901	=item $success = $client->query ($flags, "text", \&cb)
		1902
		1903	Queues a query to the client, calling the given callback with
		1904	the reply text on a reply. flags can be C<cf::CS_QUERY_YESNO>,
		1905	C<cf::CS_QUERY_SINGLECHAR> or C<cf::CS_QUERY_HIDEINPUT> or C<0>.
		1906
		1907	Queries can fail, so check the return code. Or don't, as queries will become
		1908	reliable at some point in the future.
		1909
		1910	=cut
		1911
		1912	sub cf::client::query {
		1913	my ($self, $flags, $text, $cb) = @_;
		1914
		1915	return unless $self->state == ST_PLAYING
		1916	|| $self->state == ST_SETUP
		1917	|| $self->state == ST_CUSTOM;
		1918
		1919	$self->state (ST_CUSTOM);
		1920
		1921	utf8::encode $text;
		1922	push @{ $self->{query_queue} }, [(sprintf "query %d %s", $flags, $text), $cb];
		1923
		1924	$self->send_packet ($self->{query_queue}[0][0])
		1925	if @{ $self->{query_queue} } == 1;
		1926	}
		1927
		1928	cf::client->attach (
		1929	on_reply => sub {
		1930	my ($ns, $msg) = @_;
		1931
		1932	# this weird shuffling is so that direct followup queries
		1933	# get handled first
		1934	my $queue = delete $ns->{query_queue}
		1935	or return; # be conservative, not sure how that can happen, but we saw a crash here
		1936
		1937	(shift @$queue)->[1]->($msg);
		1938
		1939	push @{ $ns->{query_queue} }, @$queue;
		1940
		1941	if (@{ $ns->{query_queue} } == @$queue) {
		1942	if (@$queue) {
		1943	$ns->send_packet ($ns->{query_queue}[0][0]);
		1944	} else {
		1945	$ns->state (ST_PLAYING) if $ns->state == ST_CUSTOM;
		1946	}
		1947	}
		1948	},
		1949	);
		1950
		1951	=item $client->async (\&cb)
		1952
		1953	Create a new coroutine, running the specified callback. The coroutine will
		1954	be automatically cancelled when the client gets destroyed (e.g. on logout,
		1955	or loss of connection).
		1956
		1957	=cut
		1958
		1959	sub cf::client::async {
		1960	my ($self, $cb) = @_;
		1961
		1962	my $coro = &Coro::async ($cb);
		1963
		1964	$coro->on_destroy (sub {
		1965	delete $self->{_coro}{$coro+0};
		1966	});
		1967
		1968	$self->{_coro}{$coro+0} = $coro;
		1969
		1970	$coro
		1971	}
		1972
		1973	cf::client->attach (
		1974	on_destroy => sub {
		1975	my ($ns) = @_;
		1976
		1977	$_->cancel for values %{ (delete $ns->{_coro}) || {} };
		1978	},
		1979	);
		1980
		1981	=back
		1982
		1983
		1984	=head2 SAFE SCRIPTING
		1985
		1986	Functions that provide a safe environment to compile and execute
		1987	snippets of perl code without them endangering the safety of the server
		1988	itself. Looping constructs, I/O operators and other built-in functionality
		1989	is not available in the safe scripting environment, and the number of
		1990	functions and methods that can be called is greatly reduced.
		1991
		1992	=cut
		1993
		1994	our $safe = new Safe "safe";
		1995	our $safe_hole = new Safe::Hole;
		1996
		1997	$SIG{FPE} = 'IGNORE';
		1998
		1999	$safe->permit_only (Opcode::opset qw(:base_core :base_mem :base_orig :base_math sort time));
		2000
		2001	# here we export the classes and methods available to script code
		2002
		2003	=pod
		2004
		2005	The following fucntions and emthods are available within a safe environment:
		2006
		2007	cf::object contr pay_amount pay_player map
		2008	cf::object::player player
		2009	cf::player peaceful
		2010	cf::map trigger
		2011
		2012	=cut
		2013
		2014	for (
		2015	["cf::object" => qw(contr pay_amount pay_player map)],
		2016	["cf::object::player" => qw(player)],
		2017	["cf::player" => qw(peaceful)],
		2018	["cf::map" => qw(trigger)],
		2019	) {
		2020	no strict 'refs';
		2021	my ($pkg, @funs) = @$_;
		2022	*{"safe::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})
		2023	for @funs;
		2024	}
		2025
		2026	=over 4
		2027
		2028	=item @retval = safe_eval $code, [var => value, ...]
		2029
		2030	Compiled and executes the given perl code snippet. additional var/value
		2031	pairs result in temporary local (my) scalar variables of the given name
		2032	that are available in the code snippet. Example:
		2033
		2034	my $five = safe_eval '$first + $second', first => 1, second => 4;
		2035
		2036	=cut
		2037
		2038	sub safe_eval($;@) {
		2039	my ($code, %vars) = @_;
		2040
		2041	my $qcode = $code;
		2042	$qcode =~ s/"/‟/g; # not allowed in #line filenames
		2043	$qcode =~ s/\n/\\n/g;
		2044
		2045	local $_;
		2046	local @safe::cf::_safe_eval_args = values %vars;
		2047
		2048	my $eval =
		2049	"do {\n"
		2050	. "my (" . (join ",", map "\$$_", keys %vars) . ") = \@cf::_safe_eval_args;\n"
		2051	. "#line 0 \"{$qcode}\"\n"
		2052	. $code
		2053	. "\n}"
		2054	;
		2055
		2056	sub_generation_inc;
		2057	my @res = wantarray ? $safe->reval ($eval) : scalar $safe->reval ($eval);
		2058	sub_generation_inc;
		2059
		2060	if ($@) {
		2061	warn "$@";
		2062	warn "while executing safe code '$code'\n";
		2063	warn "with arguments " . (join " ", %vars) . "\n";
		2064	}
		2065
		2066	wantarray ? @res : $res[0]
		2067	}
		2068
		2069	=item cf::register_script_function $function => $cb
		2070
		2071	Register a function that can be called from within map/npc scripts. The
		2072	function should be reasonably secure and should be put into a package name
		2073	like the extension.
		2074
		2075	Example: register a function that gets called whenever a map script calls
		2076	C<rent::overview>, as used by the C<rent> extension.
		2077
		2078	cf::register_script_function "rent::overview" => sub {
		2079	...
		2080	};
		2081
		2082	=cut
		2083
		2084	sub register_script_function {
		2085	my ($fun, $cb) = @_;
		2086
		2087	no strict 'refs';
		2088	*{"safe::$fun"} = $safe_hole->wrap ($cb);
		2089	}
		2090
		2091	=back
		2092
		2093	=cut
		2094
		2095	#############################################################################
		2096
		2097	=head2 EXTENSION DATABASE SUPPORT
		2098
		2099	Crossfire maintains a very simple database for extension use. It can
		2100	currently store anything that can be serialised using Storable, which
		2101	excludes objects.
		2102
		2103	The parameter C<$family> should best start with the name of the extension
		2104	using it, it should be unique.
		2105
		2106	=over 4
		2107
		2108	=item $hashref = cf::db_get $family
		2109
		2110	Return a hashref for use by the extension C<$family>, which can be
		2111	modified. After modifications, you have to call C<cf::db_dirty> or
		2112	C<cf::db_sync>.
		2113
		2114	=item $value = cf::db_get $family => $key
		2115
		2116	Returns a single value from the database
		2117
		2118	=item cf::db_put $family => $hashref
		2119
		2120	Stores the given family hashref into the database. Updates are delayed, if
		2121	you want the data to be synced to disk immediately, use C<cf::db_sync>.
		2122
		2123	=item cf::db_put $family => $key => $value
		2124
		2125	Stores the given C<$value> in the family hash. Updates are delayed, if you
		2126	want the data to be synced to disk immediately, use C<cf::db_sync>.
		2127
		2128	=item cf::db_dirty
		2129
		2130	Marks the database as dirty, to be updated at a later time.
		2131
		2132	=item cf::db_sync
		2133
		2134	Immediately write the database to disk I<if it is dirty>.
		2135
		2136	=cut
		2137
		2138	our $DB;
		2139
		2140	{
		2141	my $path = cf::localdir . "/database.pst";
		2142
		2143	sub db_load() {
		2144	$DB = stat $path ? Storable::retrieve $path : { };
		2145	}
		2146
		2147	my $pid;
		2148
		2149	sub db_save() {
		2150	waitpid $pid, 0 if $pid;
		2151	if (0 == ($pid = fork)) {
		2152	$DB->{_meta}{version} = 1;
		2153	Storable::nstore $DB, "$path~";
		2154	rename "$path~", $path;
		2155	cf::_exit 0 if defined $pid;
		2156	}
		2157	}
		2158
		2159	my $dirty;
		2160
		2161	sub db_sync() {
		2162	db_save if $dirty;
		2163	undef $dirty;
		2164	}
		2165
		2166	my $idle = Event->idle (min => $TICK * 2.8, max => 10, repeat => 0, data => WF_AUTOCANCEL, cb => sub {
		2167	db_sync;
		2168	});
		2169
		2170	sub db_dirty() {
		2171	$dirty = 1;
		2172	$idle->start;
		2173	}
		2174
		2175	sub db_get($;$) {
		2176	@_ >= 2
		2177	? $DB->{$_[0]}{$_[1]}
		2178	: ($DB->{$_[0]} ||= { })
		2179	}
		2180
		2181	sub db_put($$;$) {
		2182	if (@_ >= 3) {
		2183	$DB->{$_[0]}{$_[1]} = $_[2];
		2184	} else {
		2185	$DB->{$_[0]} = $_[1];
		2186	}
		2187	db_dirty;
		2188	}
		2189
		2190	cf::global->attach (
		2191	prio => 10000,
		2192	on_cleanup => sub {
		2193	db_sync;
		2194	},
		2195	);
		2196	}
		2197
		2198	#############################################################################
		2199	# the server's main()
		2200
		2201	sub cfg_load {
		2202	open my $fh, "<:utf8", cf::confdir . "/config"
		2203	or return;
		2204
		2205	local $/;
		2206	*CFG = YAML::Syck::Load <$fh>;
		2207
		2208	$EMERGENCY_POSITION = $CFG{emergency_position} || ["/world/world_105_115", 5, 37];
		2209
		2210	$cf::map::MAX_RESET = $CFG{map_max_reset} if exists $CFG{map_max_reset};
		2211	$cf::map::DEFAULT_RESET = $CFG{map_default_reset} if exists $CFG{map_default_reset};
		2212
		2213	if (exists $CFG{mlockall}) {
192	eval {	2214	eval {
193	unload_extension $_ for @exts;	2215	$CFG{mlockall} ? eval "mlockall()" : eval "munlockall()"
194	delete $INC{"cf.pm"};	2216	and die "WARNING: m(un)lockall failed: $!\n";
195
196	# don't, removes xs symbols, too
197	#Symbol::delete_package $pkg;
198
199	require cf;
200	};	2217	};
201	warn $@ if $@;	2218	warn $@ if $@;
202	$who->message ($@) if $@;	2219	}
203	warn "reloaded\n";	2220	}
204		2221
205	$who->message ("reloaded");	2222	sub main {
206	} else {	2223	# we must not ever block the main coroutine
207	$who->message ("Intruder Alert!");	2224	local $Coro::idle = sub {
		2225	Carp::cluck "FATAL: Coro::idle was called, major BUG, use cf::sync_job!\n";#d#
		2226	async { Event::one_event };
208	}	2227	};
		2228
		2229	cfg_load;
		2230	db_load;
		2231	load_extensions;
		2232	Event::loop;
		2233	}
		2234
		2235	#############################################################################
		2236	# initialisation and cleanup
		2237
		2238	# install some emergency cleanup handlers
		2239	BEGIN {
		2240	for my $signal (qw(INT HUP TERM)) {
		2241	Event->signal (
		2242	data => WF_AUTOCANCEL,
		2243	signal => $signal,
		2244	cb => sub {
		2245	cf::cleanup "SIG$signal";
		2246	},
		2247	);
		2248	}
		2249	}
		2250
		2251	sub emergency_save() {
		2252	my $freeze_guard = cf::freeze_mainloop;
		2253
		2254	warn "enter emergency perl save\n";
		2255
		2256	cf::sync_job {
		2257	# use a peculiar iteration method to avoid tripping on perl
		2258	# refcount bugs in for. also avoids problems with players
		2259	# and maps saved/Destroyed asynchronously.
		2260	warn "begin emergency player save\n";
		2261	for my $login (keys %cf::PLAYER) {
		2262	my $pl = $cf::PLAYER{$login} or next;
		2263	$pl->valid or next;
		2264	$pl->save;
		2265	}
		2266	warn "end emergency player save\n";
		2267
		2268	warn "begin emergency map save\n";
		2269	for my $path (keys %cf::MAP) {
		2270	my $map = $cf::MAP{$path} or next;
		2271	$map->valid or next;
		2272	$map->save;
		2273	}
		2274	warn "end emergency map save\n";
		2275	};
		2276
		2277	warn "leave emergency perl save\n";
		2278	}
		2279
		2280	sub reload() {
		2281	# can/must only be called in main
		2282	if ($Coro::current != $Coro::main) {
		2283	warn "can only reload from main coroutine\n";
		2284	return;
		2285	}
		2286
		2287	warn "reloading...";
		2288
		2289	warn "freezing server";
		2290	my $guard = freeze_mainloop;
		2291	cf::emergency_save;
		2292
		2293	warn "sync database to disk";
		2294	cf::db_sync;
		2295	IO::AIO::flush;
		2296
		2297	eval {
		2298	# if anything goes wrong in here, we should simply crash as we already saved
		2299
		2300	warn "cancel all watchers";
		2301	for (Event::all_watchers) {
		2302	$_->cancel if $_->data & WF_AUTOCANCEL;
		2303	}
		2304
		2305	warn "cancel all extension coros";
		2306	$_->cancel for values %EXT_CORO;
		2307	%EXT_CORO = ();
		2308
		2309	warn "remove commands";
		2310	%COMMAND = ();
		2311
		2312	warn "remove ext commands";
		2313	%EXTCMD = ();
		2314
		2315	warn "unload/nuke all extensions";
		2316	for my $pkg (@EXTS) {
		2317	warn "... unloading $pkg";
		2318
		2319	if (my $cb = $pkg->can ("unload")) {
		2320	eval {
		2321	$cb->($pkg);
		2322	1
		2323	} or warn "$pkg unloaded, but with errors: $@";
		2324	}
		2325
		2326	warn "... nuking $pkg";
		2327	Symbol::delete_package $pkg;
		2328	}
		2329
		2330	warn "unload all perl modules loaded from $LIBDIR";
		2331	while (my ($k, $v) = each %INC) {
		2332	next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;
		2333
		2334	warn "removing <$k>";
		2335	delete $INC{$k};
		2336
		2337	$k =~ s/\.pm$//;
		2338	$k =~ s/\//::/g;
		2339
		2340	if (my $cb = $k->can ("unload_module")) {
		2341	$cb->();
		2342	}
		2343
		2344	Symbol::delete_package $k;
		2345	}
		2346
		2347	warn "get rid of safe::, as good as possible";
		2348	Symbol::delete_package "safe::$_"
		2349	for qw(cf::attachable cf::object cf::object::player cf::client cf::player cf::map cf::party cf::region);
		2350
		2351	warn "unload cf.pm \"a bit\"";
		2352	delete $INC{"cf.pm"};
		2353
		2354	# don't, removes xs symbols, too,
		2355	# and global variables created in xs
		2356	#Symbol::delete_package __PACKAGE__;
		2357
		2358	warn "reloading cf.pm";
		2359	require cf;
		2360	cf::_connect_to_perl; # nominally unnecessary, but cannot hurt
		2361
		2362	warn "load config and database again";
		2363	cf::cfg_load;
		2364	cf::db_load;
		2365
		2366	warn "load extensions";
		2367	cf::load_extensions;
		2368
		2369	warn "reattach attachments to objects/players";
		2370	_global_reattach;
		2371	warn "reattach attachments to maps";
		2372	reattach $_ for values %MAP;
		2373	};
		2374
		2375	if ($@) {
		2376	warn $@;
		2377	warn "error while reloading, exiting.";
		2378	exit 1;
		2379	}
		2380
		2381	warn "reloaded";
209	};	2382	};
210		2383
211	load_extensions;	2384	register_command "reload" => sub {
		2385	my ($who, $arg) = @_;
		2386
		2387	if ($who->flag (FLAG_WIZ)) {
		2388	$who->message ("start of reload.");
		2389	reload;
		2390	$who->message ("end of reload.");
		2391	}
		2392	};
		2393
		2394	unshift @INC, $LIBDIR;
		2395
		2396	$TICK_WATCHER = Event->timer (
		2397	reentrant => 0,
		2398	prio => 0,
		2399	at => $NEXT_TICK || $TICK,
		2400	data => WF_AUTOCANCEL,
		2401	cb => sub {
		2402	$NOW = Event::time;
		2403
		2404	cf::server_tick; # one server iteration
		2405	$RUNTIME += $TICK;
		2406	$NEXT_TICK += $TICK;
		2407
		2408	$WAIT_FOR_TICK->broadcast;
		2409	$WAIT_FOR_TICK_ONE->send if $WAIT_FOR_TICK_ONE->awaited;
		2410
		2411	# if we are delayed by four ticks or more, skip them all
		2412	$NEXT_TICK = Event::time if Event::time >= $NEXT_TICK + $TICK * 4;
		2413
		2414	$TICK_WATCHER->at ($NEXT_TICK);
		2415	$TICK_WATCHER->start;
		2416	},
		2417	);
		2418
		2419	IO::AIO::max_poll_time $TICK * 0.2;
		2420
		2421	Event->io (
		2422	fd => IO::AIO::poll_fileno,
		2423	poll => 'r',
		2424	prio => 5,
		2425	data => WF_AUTOCANCEL,
		2426	cb => \&IO::AIO::poll_cb,
		2427	);
		2428
		2429	Event->timer (
		2430	data => WF_AUTOCANCEL,
		2431	after => 0,
		2432	interval => 10,
		2433	cb => sub {
		2434	(Coro::unblock_sub {
		2435	write_runtime
		2436	or warn "ERROR: unable to write runtime file: $!";
		2437	})->();
		2438	},
		2439	);
		2440
		2441	END { cf::emergency_save }
212		2442
213	1	2443	1
214		2444

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