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Comparing deliantra/server/lib/cf.pm (file contents):
Revision 1.35 by root, Thu Aug 24 13:35:48 2006 UTC vs.
Revision 1.105 by root, Sun Dec 31 17:17:23 2006 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;
5	use Storable;	8	use Storable;
6	use Opcode;	9	use Opcode;
7	use Safe;	10	use Safe;
8	use Safe::Hole;	11	use Safe::Hole;
9		12
		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;
		19
		20	use Fcntl;
		21	use IO::AIO 2.31 ();
		22	use YAML::Syck ();
10	use Time::HiRes;	23	use Time::HiRes;
11	use Event;	24
12	$Event::Eval = 1; # no idea why this is required, but it is	25	use Event; $Event::Eval = 1; # no idea why this is required, but it is
13		26
14	use strict;	27	# work around bug in YAML::Syck - bad news for perl6, will it be as broken wrt. unicode?
		28	$YAML::Syck::ImplicitUnicode = 1;
15		29
16	our %COMMAND;	30	$Coro::main->prio (2); # run main coroutine ("the server") with very high priority
		31
		32	sub WF_AUTOCANCEL () { 1 } # automatically cancel this watcher on reload
		33
		34	our %COMMAND = ();
		35	our %COMMAND_TIME = ();
		36	our %EXTCMD = ();
		37
17	our @EVENT;	38	our @EVENT;
18	our %PROP_TYPE;	39	our $LIBDIR = datadir . "/ext";
19	our %PROP_IDX;
20	our $LIBDIR = maps_directory "perl";
21		40
22	our $TICK = MAX_TIME * 1e-6;	41	our $TICK = MAX_TIME * 1e-6;
23	our $TICK_WATCHER;	42	our $TICK_WATCHER;
24	our $NEXT_TICK;	43	our $NEXT_TICK;
		44	our $NOW;
		45
		46	our %CFG;
		47
		48	our $UPTIME; $UPTIME ||= time;
		49	our $RUNTIME;
		50
		51	our %MAP; # all maps
		52	our $LINK_MAP; # the special {link} map
		53	our $FREEZE;
		54
		55	binmode STDOUT;
		56	binmode STDERR;
		57
		58	# read virtual server time, if available
		59	unless ($RUNTIME || !-e cf::localdir . "/runtime") {
		60	open my $fh, "<", cf::localdir . "/runtime"
		61	or die "unable to read runtime file: $!";
		62	$RUNTIME = <$fh> + 0.;
		63	}
		64
		65	mkdir cf::localdir;
		66	mkdir cf::localdir . "/" . cf::playerdir;
		67	mkdir cf::localdir . "/" . cf::tmpdir;
		68	mkdir cf::localdir . "/" . cf::uniquedir;
		69
		70	our %EXT_CORO;
		71
		72	#############################################################################
		73
		74	=head2 GLOBAL VARIABLES
		75
		76	=over 4
		77
		78	=item $cf::UPTIME
		79
		80	The timestamp of the server start (so not actually an uptime).
		81
		82	=item $cf::RUNTIME
		83
		84	The time this server has run, starts at 0 and is increased by $cf::TICK on
		85	every server tick.
		86
		87	=item $cf::LIBDIR
		88
		89	The perl library directory, where extensions and cf-specific modules can
		90	be found. It will be added to C<@INC> automatically.
		91
		92	=item $cf::NOW
		93
		94	The time of the last (current) server tick.
		95
		96	=item $cf::TICK
		97
		98	The interval between server ticks, in seconds.
		99
		100	=item %cf::CFG
		101
		102	Configuration for the server, loaded from C</etc/crossfire/config>, or
		103	from wherever your confdir points to.
		104
		105	=back
		106
		107	=cut
25		108
26	BEGIN {	109	BEGIN {
27	@EVENT = map lc, @EVENT;
28
29	*CORE::GLOBAL::warn = sub {	110	*CORE::GLOBAL::warn = sub {
30	my $msg = join "", @_;	111	my $msg = join "", @_;
		112	utf8::encode $msg;
		113
31	$msg .= "\n"	114	$msg .= "\n"
32	unless $msg =~ /\n$/;	115	unless $msg =~ /\n$/;
33		116
34	print STDERR "cfperl: $msg";
35	LOG llevError, "cfperl: $msg";	117	LOG llevError, "cfperl: $msg";
36	};	118	};
37	}	119	}
38		120
39	my %ignore_set = (MAP_PROP_PATH => 1); # I hate the plug-in api. Deeply!	121	@safe::cf::global::ISA = @cf::global::ISA = 'cf::attachable';
		122	@safe::cf::object::ISA = @cf::object::ISA = 'cf::attachable';
		123	@safe::cf::player::ISA = @cf::player::ISA = 'cf::attachable';
		124	@safe::cf::client::ISA = @cf::client::ISA = 'cf::attachable';
		125	@safe::cf::map::ISA = @cf::map::ISA = 'cf::attachable';
		126	@safe::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object';
40		127
41	# generate property mutators	128	# we bless all objects into (empty) derived classes to force a method lookup
42	sub prop_gen {	129	# within the Safe compartment.
43	my ($prefix, $class) = @_;	130	for my $pkg (qw(
44		131	cf::global cf::attachable
		132	cf::object cf::object::player
		133	cf::client cf::player
		134	cf::arch cf::living
		135	cf::map cf::party cf::region
		136	)) {
45	no strict 'refs';	137	no strict 'refs';
46
47	for my $prop (keys %PROP_TYPE) {
48	$prop =~ /^\Q$prefix\E_(.*$)/ or next;
49	my $sub = lc $1;
50
51	my $type = $PROP_TYPE{$prop};
52	my $idx = $PROP_IDX {$prop};
53
54	*{"$class\::get_$sub"} = *{"$class\::$sub"} = sub {
55	$_[0]->get_property ($type, $idx)
56	};
57
58	*{"$class\::set_$sub"} = sub {
59	$_[0]->set_property ($type, $idx, $_[1]);
60	} unless $ignore_set{$prop};
61	}
62	}
63
64	# auto-generate most of the API
65
66	prop_gen OBJECT_PROP => "cf::object";
67	# CFAPI_OBJECT_ANIMATION?
68	prop_gen PLAYER_PROP => "cf::object::player";
69
70	prop_gen MAP_PROP => "cf::map";
71	prop_gen ARCH_PROP => "cf::arch";
72
73	# guessed hierarchies
74
75	@ext::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object';
76	@ext::cf::object::map::ISA = @cf::object::map::ISA = 'cf::object';
77
78	# we bless all objects into derived classes to force a method lookup
79	# within the Safe compartment.
80	for my $pkg (qw(cf::object cf::object::map cf::object::player cf::player cf::map cf::party cf::region cf::arch)) {
81	no strict 'refs';
82	@{"ext::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;	138	@{"safe::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;
83	}	139	}
84		140
85	$Event::DIED = sub {	141	$Event::DIED = sub {
86	warn "error in event callback: @_";	142	warn "error in event callback: @_";
87	};	143	};
88		144
89	my %ext_pkg;	145	my %ext_pkg;
90	my @exts;	146	my @exts;
91	my @hook;	147	my @hook;
92	my %command;
93	my %extcmd;
94		148
95	sub inject_event {	149	=head2 UTILITY FUNCTIONS
96	my $extension = shift;	150
		151	=over 4
		152
		153	=cut
		154
		155	use JSON::Syck (); # TODO# replace by JSON::PC once working
		156
		157	=item $ref = cf::from_json $json
		158
		159	Converts a JSON string into the corresponding perl data structure.
		160
		161	=cut
		162
		163	sub from_json($) {
		164	$JSON::Syck::ImplicitUnicode = 1; # work around JSON::Syck bugs
		165	JSON::Syck::Load $_[0]
		166	}
		167
		168	=item $json = cf::to_json $ref
		169
		170	Converts a perl data structure into its JSON representation.
		171
		172	=cut
		173
		174	sub to_json($) {
		175	$JSON::Syck::ImplicitUnicode = 0; # work around JSON::Syck bugs
		176	JSON::Syck::Dump $_[0]
		177	}
		178
		179	# main coro must never ever "block" except in Event
		180	# sync_job ensures this by running the job in a coroutine
		181	# and waiting in Event while the server is otherwise frozen
		182	sub sync_job(&) {
		183	my ($job) = @_;
		184
		185	my $busy = 1;
		186	my @res;
		187
		188	local $FREEZE = 1;
		189
		190	my $coro = Coro::async {
		191	@res = eval { $job->() };
		192	warn $@ if $@;
		193	undef $busy;
		194	};
		195
		196	if ($Coro::current == $Coro::main) {
		197	$coro->prio (Coro::PRIO_MAX);
		198	while ($busy) {
		199	Coro::cede_notself;
		200	Event::one_event unless Coro::nready;
		201	}
		202	} else {
		203	$coro->join;
		204	}
		205
		206	wantarray ? @res : $res[0]
		207	}
		208
		209	=item $coro = cf::coro { BLOCK }
		210
		211	Creates and returns a new coro. This coro is automcatially being canceled
		212	when the extension calling this is being unloaded.
		213
		214	=cut
		215
		216	sub coro(&) {
		217	my $cb = shift;
		218
		219	my $coro; $coro = async {
		220	eval {
		221	$cb->();
		222	};
		223	warn $@ if $@;
		224	};
		225
		226	$coro->on_destroy (sub {
		227	delete $EXT_CORO{$coro+0};
		228	});
		229	$EXT_CORO{$coro+0} = $coro;
		230
		231	$coro
		232	}
		233
		234	=back
		235
		236	=cut
		237
		238	#############################################################################
		239
		240	=head2 ATTACHABLE OBJECTS
		241
		242	Many objects in crossfire are so-called attachable objects. That means you can
		243	attach callbacks/event handlers (a collection of which is called an "attachment")
		244	to it. All such attachable objects support the following methods.
		245
		246	In the following description, CLASS can be any of C<global>, C<object>
		247	C<player>, C<client> or C<map> (i.e. the attachable objects in
		248	crossfire+).
		249
		250	=over 4
		251
		252	=item $attachable->attach ($attachment, key => $value...)
		253
		254	=item $attachable->detach ($attachment)
		255
		256	Attach/detach a pre-registered attachment to a specific object and give it
		257	the specified key/value pairs as arguments.
		258
		259	Example, attach a minesweeper attachment to the given object, making it a
		260	10x10 minesweeper game:
		261
		262	$obj->attach (minesweeper => width => 10, height => 10);
		263
		264	=item $bool = $attachable->attached ($name)
		265
		266	Checks wether the named attachment is currently attached to the object.
		267
		268	=item cf::CLASS->attach ...
		269
		270	=item cf::CLASS->detach ...
		271
		272	Define an anonymous attachment and attach it to all objects of the given
		273	CLASS. See the next function for an explanation of its arguments.
		274
		275	You can attach to global events by using the C<cf::global> class.
		276
		277	Example, log all player logins:
		278
		279	cf::player->attach (
		280	on_login => sub {
		281	my ($pl) = @_;
		282	...
		283	},
		284	);
		285
		286	Example, attach to the jeweler skill:
		287
		288	cf::object->attach (
		289	type => cf::SKILL,
		290	subtype => cf::SK_JEWELER,
		291	on_use_skill => sub {
		292	my ($sk, $ob, $part, $dir, $msg) = @_;
		293	...
		294	},
		295	);
		296
		297	=item cf::CLASS::attachment $name, ...
		298
		299	Register an attachment by C<$name> through which attachable objects of the
		300	given CLASS can refer to this attachment.
		301
		302	Some classes such as crossfire maps and objects can specify attachments
		303	that are attached at load/instantiate time, thus the need for a name.
		304
		305	These calls expect any number of the following handler/hook descriptions:
		306
		307	=over 4
		308
		309	=item prio => $number
		310
		311	Set the priority for all following handlers/hooks (unless overwritten
		312	by another C<prio> setting). Lower priority handlers get executed
		313	earlier. The default priority is C<0>, and many built-in handlers are
		314	registered at priority C<-1000>, so lower priorities should not be used
		315	unless you know what you are doing.
		316
		317	=item type => $type
		318
		319	(Only for C<< cf::object->attach >> calls), limits the attachment to the
		320	given type of objects only (the additional parameter C<subtype> can be
		321	used to further limit to the given subtype).
		322
		323	=item on_I<event> => \&cb
		324
		325	Call the given code reference whenever the named event happens (event is
		326	something like C<instantiate>, C<apply>, C<use_skill> and so on, and which
		327	handlers are recognised generally depends on the type of object these
		328	handlers attach to).
		329
		330	See F<include/eventinc.h> for the full list of events supported, and their
		331	class.
		332
		333	=item package => package::
		334
		335	Look for sub functions of the name C<< on_I<event> >> in the given
		336	package and register them. Only handlers for eevents supported by the
		337	object/class are recognised.
		338
		339	=back
		340
		341	Example, define an attachment called "sockpuppet" that calls the given
		342	event handler when a monster attacks:
		343
		344	cf::object::attachment sockpuppet =>
		345	on_skill_attack => sub {
		346	my ($self, $victim) = @_;
		347	...
		348	}
		349	}
		350
		351	=item $attachable->valid
		352
		353	Just because you have a perl object does not mean that the corresponding
		354	C-level object still exists. If you try to access an object that has no
		355	valid C counterpart anymore you get an exception at runtime. This method
		356	can be used to test for existence of the C object part without causing an
		357	exception.
		358
		359	=cut
		360
		361	# the following variables are defined in .xs and must not be re-created
		362	our @CB_GLOBAL = (); # registry for all global events
		363	our @CB_ATTACHABLE = (); # registry for all attachables
		364	our @CB_OBJECT = (); # all objects (should not be used except in emergency)
		365	our @CB_PLAYER = ();
		366	our @CB_CLIENT = ();
		367	our @CB_TYPE = (); # registry for type (cf-object class) based events
		368	our @CB_MAP = ();
		369
		370	my %attachment;
		371
		372	sub _attach_cb($$$$) {
		373	my ($registry, $event, $prio, $cb) = @_;
		374
		375	use sort 'stable';
		376
		377	$cb = [$prio, $cb];
		378
		379	@{$registry->[$event]} = sort
		380	{ $a->[0] cmp $b->[0] }
		381	@{$registry->[$event] || []}, $cb;
		382	}
		383
		384	# hack
		385	my %attachable_klass = map +($_ => 1), KLASS_OBJECT, KLASS_CLIENT, KLASS_PLAYER, KLASS_MAP;
		386
		387	# attach handles attaching event callbacks
		388	# the only thing the caller has to do is pass the correct
		389	# registry (== where the callback attaches to).
		390	sub _attach {
		391	my ($registry, $klass, @arg) = @_;
		392
		393	my $object_type;
		394	my $prio = 0;
		395	my %cb_id = map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == $klass, 0 .. $#EVENT;
		396
		397	#TODO: get rid of this hack
		398	if ($attachable_klass{$klass}) {
		399	%cb_id = (%cb_id, map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == KLASS_ATTACHABLE, 0 .. $#EVENT);
		400	}
		401
		402	while (@arg) {
		403	my $type = shift @arg;
		404
		405	if ($type eq "prio") {
		406	$prio = shift @arg;
		407
		408	} elsif ($type eq "type") {
		409	$object_type = shift @arg;
		410	$registry = $CB_TYPE[$object_type] ||= [];
		411
		412	} elsif ($type eq "subtype") {
		413	defined $object_type or Carp::croak "subtype specified without type";
		414	my $object_subtype = shift @arg;
		415	$registry = $CB_TYPE[$object_type + $object_subtype * NUM_SUBTYPES] ||= [];
		416
		417	} elsif ($type eq "package") {
		418	my $pkg = shift @arg;
		419
		420	while (my ($name, $id) = each %cb_id) {
		421	if (my $cb = $pkg->can ($name)) {
		422	_attach_cb $registry, $id, $prio, $cb;
		423	}
		424	}
		425
		426	} elsif (exists $cb_id{$type}) {
		427	_attach_cb $registry, $cb_id{$type}, $prio, shift @arg;
		428
		429	} elsif (ref $type) {
		430	warn "attaching objects not supported, ignoring.\n";
		431
		432	} else {
		433	shift @arg;
		434	warn "attach argument '$type' not supported, ignoring.\n";
		435	}
		436	}
		437	}
		438
		439	sub _object_attach {
		440	my ($obj, $name, %arg) = @_;
		441
		442	return if exists $obj->{_attachment}{$name};
		443
		444	if (my $attach = $attachment{$name}) {
		445	my $registry = $obj->registry;
		446
		447	for (@$attach) {
		448	my ($klass, @attach) = @$_;
		449	_attach $registry, $klass, @attach;
		450	}
		451
		452	$obj->{$name} = \%arg;
		453	} else {
		454	warn "object uses attachment '$name' that is not available, postponing.\n";
		455	}
		456
		457	$obj->{_attachment}{$name} = undef;
		458	}
		459
		460	sub cf::attachable::attach {
		461	if (ref $_[0]) {
		462	_object_attach @_;
		463	} else {
		464	_attach shift->_attach_registry, @_;
		465	}
		466	};
		467
		468	# all those should be optimised
		469	sub cf::attachable::detach {
		470	my ($obj, $name) = @_;
		471
		472	if (ref $obj) {
		473	delete $obj->{_attachment}{$name};
		474	reattach ($obj);
		475	} else {
		476	Carp::croak "cannot, currently, detach class attachments";
		477	}
		478	};
		479
		480	sub cf::attachable::attached {
		481	my ($obj, $name) = @_;
		482
		483	exists $obj->{_attachment}{$name}
		484	}
		485
		486	for my $klass (qw(ATTACHABLE GLOBAL OBJECT PLAYER CLIENT MAP)) {
		487	eval "#line " . __LINE__ . " 'cf.pm'
		488	sub cf::\L$klass\E::_attach_registry {
		489	(\\\@CB_$klass, KLASS_$klass)
		490	}
		491
		492	sub cf::\L$klass\E::attachment {
		493	my \$name = shift;
		494
		495	\$attachment{\$name} = [[KLASS_$klass, \@_]];
		496	}
		497	";
		498	die if $@;
		499	}
		500
		501	our $override;
		502	our @invoke_results = (); # referenced from .xs code. TODO: play tricks with reify and mortals?
		503
		504	sub override {
		505	$override = 1;
		506	@invoke_results = ();
		507	}
		508
		509	sub do_invoke {
97	my $event_code = shift;	510	my $event = shift;
		511	my $callbacks = shift;
98		512
99	my $cb = $hook[$event_code]{$extension}	513	@invoke_results = ();
		514
		515	local $override;
		516
		517	for (@$callbacks) {
		518	eval { &{$_->[1]} };
		519
		520	if ($@) {
		521	warn "$@";
		522	warn "... while processing $EVENT[$event][0](@_) event, skipping processing altogether.\n";
		523	override;
		524	}
		525
		526	return 1 if $override;
		527	}
		528
		529	0
		530	}
		531
		532	=item $bool = cf::global::invoke (EVENT_CLASS_XXX, ...)
		533
		534	=item $bool = $attachable->invoke (EVENT_CLASS_XXX, ...)
		535
		536	Generate an object-specific event with the given arguments.
		537
		538	This API is preliminary (most likely, the EVENT_CLASS_xxx prefix will be
		539	removed in future versions), and there is no public API to access override
		540	results (if you must, access C<@cf::invoke_results> directly).
		541
		542	=back
		543
		544	=cut
		545
		546	#############################################################################
		547	# object support
		548
		549	sub reattach {
		550	# basically do the same as instantiate, without calling instantiate
		551	my ($obj) = @_;
		552
		553	my $registry = $obj->registry;
		554
		555	@$registry = ();
		556
		557	delete $obj->{_attachment} unless scalar keys %{ $obj->{_attachment} || {} };
		558
		559	for my $name (keys %{ $obj->{_attachment} || {} }) {
		560	if (my $attach = $attachment{$name}) {
		561	for (@$attach) {
		562	my ($klass, @attach) = @$_;
		563	_attach $registry, $klass, @attach;
		564	}
		565	} else {
		566	warn "object uses attachment '$name' that is not available, postponing.\n";
		567	}
		568	}
		569	}
		570
		571	cf::attachable->attach (
		572	prio => -1000000,
		573	on_instantiate => sub {
		574	my ($obj, $data) = @_;
		575
		576	$data = from_json $data;
		577
		578	for (@$data) {
		579	my ($name, $args) = @$_;
		580
		581	$obj->attach ($name, %{$args || {} });
		582	}
		583	},
		584	on_reattach => \&reattach,
		585	on_clone => sub {
		586	my ($src, $dst) = @_;
		587
		588	@{$dst->registry} = @{$src->registry};
		589
		590	%$dst = %$src;
		591
		592	%{$dst->{_attachment}} = %{$src->{_attachment}}
		593	if exists $src->{_attachment};
		594	},
		595	);
		596
		597	sub object_freezer_save {
		598	my ($filename, $rdata, $objs) = @_;
		599
		600	sync_job {
		601	if (length $$rdata) {
		602	warn sprintf "saving %s (%d,%d)\n",
		603	$filename, length $$rdata, scalar @$objs;
		604
		605	if (my $fh = aio_open "$filename~", O_WRONLY | O_CREAT, 0600) {
		606	chmod SAVE_MODE, $fh;
		607	aio_write $fh, 0, (length $$rdata), $$rdata, 0;
		608	aio_fsync $fh;
		609	close $fh;
		610
		611	if (@$objs) {
		612	if (my $fh = aio_open "$filename.pst~", O_WRONLY | O_CREAT, 0600) {
		613	chmod SAVE_MODE, $fh;
		614	my $data = Storable::nfreeze { version => 1, objs => $objs };
		615	aio_write $fh, 0, (length $data), $data, 0;
		616	aio_fsync $fh;
		617	close $fh;
		618	aio_rename "$filename.pst~", "$filename.pst";
		619	}
		620	} else {
		621	aio_unlink "$filename.pst";
		622	}
		623
		624	aio_rename "$filename~", $filename;
		625	} else {
		626	warn "FATAL: $filename~: $!\n";
		627	}
		628	} else {
		629	aio_unlink $filename;
		630	aio_unlink "$filename.pst";
		631	}
		632	}
		633	}
		634
		635	sub object_freezer_as_string {
		636	my ($rdata, $objs) = @_;
		637
		638	use Data::Dumper;
		639
		640	$$rdata . Dumper $objs
		641	}
		642
		643	sub object_thawer_load {
		644	my ($filename) = @_;
		645
		646	my ($data, $av);
		647
		648	(aio_load $filename, $data) >= 0
100	or return;	649	or return;
101		650
102	&$cb	651	unless (aio_stat "$filename.pst") {
103	}	652	(aio_load "$filename.pst", $av) >= 0
104
105	sub inject_global_event {
106	my $event = shift;
107
108	my $cb = $hook[$event]
109	or return;	653	or return;
110		654	$av = eval { (Storable::thaw <$av>)->{objs} };
111	List::Util::max map &$_, values %$cb
112	}
113
114	sub inject_command {
115	my ($name, $obj, $params) = @_;
116
117	for my $cmd (@{ $command{$name} }) {
118	$cmd->[1]->($obj, $params);
119	}	655	}
120		656
121	-1	657	return ($data, $av);
122	}	658	}
		659
		660	#############################################################################
		661	# command handling &c
		662
		663	=item cf::register_command $name => \&callback($ob,$args);
		664
		665	Register a callback for execution when the client sends the user command
		666	$name.
		667
		668	=cut
123		669
124	sub register_command {	670	sub register_command {
125	my ($name, $time, $cb) = @_;	671	my ($name, $cb) = @_;
126		672
127	my $caller = caller;	673	my $caller = caller;
128	#warn "registering command '$name/$time' to '$caller'";	674	#warn "registering command '$name/$time' to '$caller'";
129		675
130	push @{ $command{$name} }, [$time, $cb, $caller];	676	push @{ $COMMAND{$name} }, [$caller, $cb];
131	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @{ $command{$name} };
132	}	677	}
		678
		679	=item cf::register_extcmd $name => \&callback($pl,$packet);
		680
		681	Register a callbackf ro execution when the client sends an extcmd packet.
		682
		683	If the callback returns something, it is sent back as if reply was being
		684	called.
		685
		686	=cut
133		687
134	sub register_extcmd {	688	sub register_extcmd {
135	my ($name, $cb) = @_;	689	my ($name, $cb) = @_;
136		690
137	my $caller = caller;	691	my $caller = caller;
138	#warn "registering extcmd '$name' to '$caller'";	692	#warn "registering extcmd '$name' to '$caller'";
139		693
140	$extcmd{$name} = [$cb, $caller];	694	$EXTCMD{$name} = [$cb, $caller];
141	}	695	}
		696
		697	cf::player->attach (
		698	on_command => sub {
		699	my ($pl, $name, $params) = @_;
		700
		701	my $cb = $COMMAND{$name}
		702	or return;
		703
		704	for my $cmd (@$cb) {
		705	$cmd->[1]->($pl->ob, $params);
		706	}
		707
		708	cf::override;
		709	},
		710	on_extcmd => sub {
		711	my ($pl, $buf) = @_;
		712
		713	my $msg = eval { from_json $buf };
		714
		715	if (ref $msg) {
		716	if (my $cb = $EXTCMD{$msg->{msgtype}}) {
		717	if (my %reply = $cb->[0]->($pl, $msg)) {
		718	$pl->ext_reply ($msg->{msgid}, %reply);
		719	}
		720	}
		721	} else {
		722	warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";
		723	}
		724
		725	cf::override;
		726	},
		727	);
142		728
143	sub register {	729	sub register {
144	my ($base, $pkg) = @_;	730	my ($base, $pkg) = @_;
145		731
146	for my $idx (0 .. $#EVENT) {	732	#TODO
147	if (my $ref = $pkg->can ("on_$EVENT[$idx]")) {
148	#warn "registering $EVENT[$idx] hook to '$pkg'\n";
149	$hook[$idx]{$base} = $ref;
150	}
151	}
152	}	733	}
153		734
154	sub load_extension {	735	sub load_extension {
155	my ($path) = @_;	736	my ($path) = @_;
156		737
157	$path =~ /([^\/\\]+)\.ext$/ or die "$path";	738	$path =~ /([^\/\\]+)\.ext$/ or die "$path";
158	my $base = $1;	739	my $base = $1;
159	my $pkg = $1;	740	my $pkg = $1;
160	$pkg =~ s/[^[:word:]]/_/g;	741	$pkg =~ s/[^[:word:]]/_/g;
161	$pkg = "cf::ext::$pkg";	742	$pkg = "ext::$pkg";
162		743
163	warn "loading '$path' into '$pkg'\n";	744	warn "loading '$path' into '$pkg'\n";
164		745
165	open my $fh, "<:utf8", $path	746	open my $fh, "<:utf8", $path
166	or die "$path: $!";	747	or die "$path: $!";
…		…
170	. "#line 1 \"$path\"\n{\n"	751	. "#line 1 \"$path\"\n{\n"
171	. (do { local $/; <$fh> })	752	. (do { local $/; <$fh> })
172	. "\n};\n1";	753	. "\n};\n1";
173		754
174	eval $source	755	eval $source
175	or die "$path: $@";	756	or die $@ ? "$path: $@\n"
		757	: "extension disabled.\n";
176		758
177	push @exts, $pkg;	759	push @exts, $pkg;
178	$ext_pkg{$base} = $pkg;	760	$ext_pkg{$base} = $pkg;
179		761
180	# no strict 'refs';	762	# no strict 'refs';
…		…
187	my ($pkg) = @_;	769	my ($pkg) = @_;
188		770
189	warn "removing extension $pkg\n";	771	warn "removing extension $pkg\n";
190		772
191	# remove hooks	773	# remove hooks
		774	#TODO
192	for my $idx (0 .. $#EVENT) {	775	# for my $idx (0 .. $#PLUGIN_EVENT) {
193	delete $hook[$idx]{$pkg};	776	# delete $hook[$idx]{$pkg};
194	}	777	# }
195		778
196	# remove commands	779	# remove commands
197	for my $name (keys %command) {	780	for my $name (keys %COMMAND) {
198	my @cb = grep $_->[2] ne $pkg, @{ $command{$name} };	781	my @cb = grep $_->[0] ne $pkg, @{ $COMMAND{$name} };
199		782
200	if (@cb) {	783	if (@cb) {
201	$command{$name} = \@cb;	784	$COMMAND{$name} = \@cb;
202	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @cb;
203	} else {	785	} else {
204	delete $command{$name};
205	delete $COMMAND{"$name\000"};	786	delete $COMMAND{$name};
206	}	787	}
207	}	788	}
208		789
209	# remove extcmds	790	# remove extcmds
210	for my $name (grep $extcmd{$_}[1] eq $pkg, keys %extcmd) {	791	for my $name (grep $EXTCMD{$_}[1] eq $pkg, keys %EXTCMD) {
211	delete $extcmd{$name};	792	delete $EXTCMD{$name};
212	}	793	}
213		794
214	if (my $cb = $pkg->can ("on_unload")) {	795	if (my $cb = $pkg->can ("unload")) {
215	eval {	796	eval {
216	$cb->($pkg);	797	$cb->($pkg);
217	1	798	1
218	} or warn "$pkg unloaded, but with errors: $@";	799	} or warn "$pkg unloaded, but with errors: $@";
219	}	800	}
220		801
221	Symbol::delete_package $pkg;	802	Symbol::delete_package $pkg;
222	}	803	}
223		804
224	sub load_extensions {	805	sub load_extensions {
225	my $LIBDIR = maps_directory "perl";
226
227	for my $ext (<$LIBDIR/*.ext>) {	806	for my $ext (<$LIBDIR/*.ext>) {
228	next unless -r $ext;	807	next unless -r $ext;
229	eval {	808	eval {
230	load_extension $ext;	809	load_extension $ext;
231	1	810	1
232	} or warn "$ext not loaded: $@";	811	} or warn "$ext not loaded: $@";
233	}	812	}
234	}	813	}
235		814
236	register_command "perl-reload", 0, sub {
237	my ($who, $arg) = @_;
238
239	if ($who->flag (FLAG_WIZ)) {
240	$who->message ("reloading...");
241
242	warn "reloading...\n";
243	eval {
244	# 1. cancel all watchers
245	$_->cancel for Event::all_watchers;
246
247	# 2. unload all extensions
248	for (@exts) {
249	$who->message ("unloading <$_>");
250	unload_extension $_;
251	}
252
253	# 3. unload all modules loaded from $LIBDIR
254	while (my ($k, $v) = each %INC) {
255	next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;
256
257	$who->message ("removing <$k>");
258	delete $INC{$k};
259
260	$k =~ s/\.pm$//;
261	$k =~ s/\//::/g;
262
263	if (my $cb = $k->can ("unload_module")) {
264	$cb->();
265	}
266
267	Symbol::delete_package $k;
268	}
269
270	# 4. get rid of ext::, as good as possible
271	Symbol::delete_package "ext::$_"
272	for qw(cf::object cf::object::map cf::object::player cf::player cf::map cf::party cf::region);
273
274	# 5. remove register_script_function callbacks
275	# TODO
276
277	# 6. unload cf.pm "a bit"
278	delete $INC{"cf.pm"};
279
280	# don't, removes xs symbols, too
281	#Symbol::delete_package __PACKAGE__;
282
283	# 7. reload cf.pm
284	$who->message ("reloading cf.pm");
285	require cf;
286	};
287	warn $@ if $@;
288	$who->message ($@) if $@;
289	warn "reloaded\n";
290
291	$who->message ("reloaded");
292	} else {
293	$who->message ("Intruder Alert!");
294	}
295	};
296
297	#############################################################################
298	# utility functions
299
300	use JSON::Syck (); # TODO# replace by JSON::PC once working
301
302	sub from_json($) {
303	$JSON::Syck::ImplicitUnicode = 1; # work around JSON::Syck bugs
304	JSON::Syck::Load $_[0]
305	}
306
307	sub to_json($) {
308	$JSON::Syck::ImplicitUnicode = 0; # work around JSON::Syck bugs
309	JSON::Syck::Dump $_[0]
310	}
311
312	#############################################################################
313	# extcmd framework, basically convert ext <msg>
314	# into pkg::->on_extcmd_arg1 (...) while shortcutting a few
315
316	sub on_extcmd {
317	my ($pl, $buf) = @_;
318
319	my $msg = eval { from_json $buf };
320
321	if (ref $msg) {
322	if (my $cb = $extcmd{$msg->{msgtype}}) {
323	if (my %reply = $cb->[0]->($pl, $msg)) {
324	$pl->ext_reply ($msg->{msgid}, %reply);
325	}
326	}
327	} else {
328	warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";
329	}
330
331	1
332	}
333
334	#############################################################################	815	#############################################################################
335	# load/save/clean perl data associated with a map	816	# load/save/clean perl data associated with a map
336		817
337	*on_mapclean = sub {	818	*cf::mapsupport::on_clean = sub {
338	my ($map) = @_;	819	my ($map) = @_;
339		820
340	my $path = $map->tmpname;	821	my $path = $map->tmpname;
341	defined $path or return;	822	defined $path or return;
342		823
343	unlink "$path.cfperl";	824	unlink "$path.pst";
344	};	825	};
345		826
346	*on_mapin =	827	cf::map->attach (prio => -10000, package => cf::mapsupport::);
347	*on_mapload = sub {
348	my ($map) = @_;
349
350	my $path = $map->tmpname;
351	$path = $map->path unless defined $path;
352
353	open my $fh, "<:raw", "$path.cfperl"
354	or return; # no perl data
355
356	my $data = Storable::thaw do { local $/; <$fh> };
357
358	$data->{version} <= 1
359	or return; # too new
360
361	$map->_set_obs ($data->{obs});
362	};
363
364	*on_mapout = sub {
365	my ($map) = @_;
366
367	my $path = $map->tmpname;
368	$path = $map->path unless defined $path;
369
370	my $obs = $map->_get_obs;
371
372	if (defined $obs) {
373	open my $fh, ">:raw", "$path.cfperl"
374	or die "$path.cfperl: $!";
375
376	stat $path;
377
378	print $fh Storable::nfreeze {
379	size => (stat _)[7],
380	time => (stat _)[9],
381	version => 1,
382	obs => $obs,
383	};
384
385	chmod SAVE_MODE, "$path.cfperl"; # very racy, but cf-compatible *g*
386	} else {
387	unlink "$path.cfperl";
388	}
389	};
390		828
391	#############################################################################	829	#############################################################################
392	# load/save perl data associated with player->ob objects	830	# load/save perl data associated with player->ob objects
393		831
394	sub all_objects(@) {	832	sub all_objects(@) {
395	@_, map all_objects ($_->inv), @_	833	@_, map all_objects ($_->inv), @_
396	}	834	}
397		835
398	*on_player_load = sub {	836	# TODO: compatibility cruft, remove when no longer needed
		837	cf::player->attach (
		838	on_load => sub {
399	my ($ob, $path) = @_;	839	my ($pl, $path) = @_;
400		840
401	for my $o (all_objects $ob) {	841	for my $o (all_objects $pl->ob) {
402	if (my $value = $o->get_ob_key_value ("_perl_data")) {	842	if (my $value = $o->get_ob_key_value ("_perl_data")) {
403	$o->set_ob_key_value ("_perl_data");	843	$o->set_ob_key_value ("_perl_data");
404		844
405	%$o = %{ Storable::thaw pack "H*", $value };	845	%$o = %{ Storable::thaw pack "H*", $value };
406	}	846	}
		847	}
407	}	848	},
408	};	849	);
409
410	*on_player_save = sub {
411	my ($ob, $path) = @_;
412
413	$_->set_ob_key_value (_perl_data => unpack "H*", Storable::nfreeze $_)
414	for grep %$_, all_objects $ob;
415	};
416		850
417	#############################################################################	851	#############################################################################
418	# core extensions - in perl	852
		853	=head2 CORE EXTENSIONS
		854
		855	Functions and methods that extend core crossfire objects.
		856
		857	=head3 cf::player
		858
		859	=over 4
419		860
420	=item cf::player::exists $login	861	=item cf::player::exists $login
421		862
422	Returns true when the given account exists.	863	Returns true when the given account exists.
423		864
…		…
426	sub cf::player::exists($) {	867	sub cf::player::exists($) {
427	cf::player::find $_[0]	868	cf::player::find $_[0]
428	or -f sprintf "%s/%s/%s/%s.pl", cf::localdir, cf::playerdir, ($_[0]) x 2;	869	or -f sprintf "%s/%s/%s/%s.pl", cf::localdir, cf::playerdir, ($_[0]) x 2;
429	}	870	}
430		871
		872	=item $player->ext_reply ($msgid, $msgtype, %msg)
		873
		874	Sends an ext reply to the player.
		875
		876	=cut
		877
		878	sub cf::player::ext_reply($$$%) {
		879	my ($self, $id, %msg) = @_;
		880
		881	$msg{msgid} = $id;
		882
		883	$self->send ("ext " . to_json \%msg);
		884	}
		885
		886	=back
		887
		888	=head3 cf::object::player
		889
		890	=over 4
		891
431	=item $player->reply ($npc, $msg[, $flags])	892	=item $player_object->reply ($npc, $msg[, $flags])
432		893
433	Sends a message to the player, as if the npc C<$npc> replied. C<$npc>	894	Sends a message to the player, as if the npc C<$npc> replied. C<$npc>
434	can be C<undef>. Does the right thing when the player is currently in a	895	can be C<undef>. Does the right thing when the player is currently in a
435	dialogue with the given NPC character.	896	dialogue with the given NPC character.
436		897
437	=cut	898	=cut
438		899
439	# rough implementation of a future "reply" method that works	900	# rough implementation of a future "reply" method that works
440	# with dialog boxes.	901	# with dialog boxes.
		902	#TODO: the first argument must go, split into a $npc->reply_to ( method
441	sub cf::object::player::reply($$$;$) {	903	sub cf::object::player::reply($$$;$) {
442	my ($self, $npc, $msg, $flags) = @_;	904	my ($self, $npc, $msg, $flags) = @_;
443		905
444	$flags = cf::NDI_BROWN | cf::NDI_UNIQUE unless @_ >= 4;	906	$flags = cf::NDI_BROWN | cf::NDI_UNIQUE unless @_ >= 4;
445		907
…		…
449	$msg = $npc->name . " says: $msg" if $npc;	911	$msg = $npc->name . " says: $msg" if $npc;
450	$self->message ($msg, $flags);	912	$self->message ($msg, $flags);
451	}	913	}
452	}	914	}
453		915
454	=item $player->ext_reply ($msgid, $msgtype, %msg)	916	=item $player_object->may ("access")
455		917
456	Sends an ext reply to the player.	918	Returns wether the given player is authorized to access resource "access"
		919	(e.g. "command_wizcast").
457		920
458	=cut	921	=cut
459		922
460	sub cf::player::ext_reply($$$%) {	923	sub cf::object::player::may {
		924	my ($self, $access) = @_;
		925
		926	$self->flag (cf::FLAG_WIZ) ||
		927	(ref $cf::CFG{"may_$access"}
		928	? scalar grep $self->name eq $_, @{$cf::CFG{"may_$access"}}
		929	: $cf::CFG{"may_$access"})
		930	}
		931
		932	=head3 cf::client
		933
		934	=over 4
		935
		936	=item $client->send_drawinfo ($text, $flags)
		937
		938	Sends a drawinfo packet to the client. Circumvents output buffering so
		939	should not be used under normal circumstances.
		940
		941	=cut
		942
		943	sub cf::client::send_drawinfo {
		944	my ($self, $text, $flags) = @_;
		945
		946	utf8::encode $text;
		947	$self->send_packet (sprintf "drawinfo %d %s", $flags, $text);
		948	}
		949
		950
		951	=item $success = $client->query ($flags, "text", \&cb)
		952
		953	Queues a query to the client, calling the given callback with
		954	the reply text on a reply. flags can be C<cf::CS_QUERY_YESNO>,
		955	C<cf::CS_QUERY_SINGLECHAR> or C<cf::CS_QUERY_HIDEINPUT> or C<0>.
		956
		957	Queries can fail, so check the return code. Or don't, as queries will become
		958	reliable at some point in the future.
		959
		960	=cut
		961
		962	sub cf::client::query {
		963	my ($self, $flags, $text, $cb) = @_;
		964
		965	return unless $self->state == ST_PLAYING
		966	|| $self->state == ST_SETUP
		967	|| $self->state == ST_CUSTOM;
		968
		969	$self->state (ST_CUSTOM);
		970
		971	utf8::encode $text;
		972	push @{ $self->{query_queue} }, [(sprintf "query %d %s", $flags, $text), $cb];
		973
		974	$self->send_packet ($self->{query_queue}[0][0])
		975	if @{ $self->{query_queue} } == 1;
		976	}
		977
		978	cf::client->attach (
		979	on_reply => sub {
		980	my ($ns, $msg) = @_;
		981
		982	# this weird shuffling is so that direct followup queries
		983	# get handled first
		984	my $queue = delete $ns->{query_queue};
		985
		986	(shift @$queue)->[1]->($msg);
		987
		988	push @{ $ns->{query_queue} }, @$queue;
		989
		990	if (@{ $ns->{query_queue} } == @$queue) {
		991	if (@$queue) {
		992	$ns->send_packet ($ns->{query_queue}[0][0]);
		993	} else {
		994	$ns->state (ST_PLAYING) if $ns->state == ST_CUSTOM;
		995	}
		996	}
		997	},
		998	);
		999
		1000	=item $client->coro (\&cb)
		1001
		1002	Create a new coroutine, running the specified callback. The coroutine will
		1003	be automatically cancelled when the client gets destroyed (e.g. on logout,
		1004	or loss of connection).
		1005
		1006	=cut
		1007
		1008	sub cf::client::coro {
461	my ($self, $id, %msg) = @_;	1009	my ($self, $cb) = @_;
462		1010
463	$msg{msgid} = $id;	1011	my $coro; $coro = async {
		1012	eval {
		1013	$cb->();
		1014	};
		1015	warn $@ if $@;
		1016	};
464		1017
465	$self->send ("ext " . to_json \%msg);	1018	$coro->on_destroy (sub {
466	}	1019	delete $self->{_coro}{$coro+0};
		1020	});
467		1021
468	#############################################################################	1022	$self->{_coro}{$coro+0} = $coro;
469	# map scripting support
470		1023
		1024	$coro
		1025	}
		1026
		1027	cf::client->attach (
		1028	on_destroy => sub {
		1029	my ($ns) = @_;
		1030
		1031	$_->cancel for values %{ (delete $ns->{_coro}) || {} };
		1032	},
		1033	);
		1034
		1035	=back
		1036
		1037
		1038	=head2 SAFE SCRIPTING
		1039
		1040	Functions that provide a safe environment to compile and execute
		1041	snippets of perl code without them endangering the safety of the server
		1042	itself. Looping constructs, I/O operators and other built-in functionality
		1043	is not available in the safe scripting environment, and the number of
		1044	functions and methods that can be called is greatly reduced.
		1045
		1046	=cut
		1047
471	our $safe = new Safe "ext";	1048	our $safe = new Safe "safe";
472	our $safe_hole = new Safe::Hole;	1049	our $safe_hole = new Safe::Hole;
473		1050
474	$SIG{FPE} = 'IGNORE';	1051	$SIG{FPE} = 'IGNORE';
475		1052
476	$safe->permit_only (Opcode::opset qw(:base_core :base_mem :base_orig :base_math sort time));	1053	$safe->permit_only (Opcode::opset qw(:base_core :base_mem :base_orig :base_math sort time));
477		1054
478	# here we export the classes and methods available to script code	1055	# here we export the classes and methods available to script code
479		1056
		1057	=pod
		1058
		1059	The following fucntions and emthods are available within a safe environment:
		1060
		1061	cf::object contr pay_amount pay_player map
		1062	cf::object::player player
		1063	cf::player peaceful
		1064	cf::map trigger
		1065
		1066	=cut
		1067
480	for (	1068	for (
481	["cf::object" => qw(contr pay_amount pay_player)],	1069	["cf::object" => qw(contr pay_amount pay_player map)],
482	["cf::object::player" => qw(player)],	1070	["cf::object::player" => qw(player)],
483	["cf::player" => qw(peaceful)],	1071	["cf::player" => qw(peaceful)],
		1072	["cf::map" => qw(trigger)],
484	) {	1073	) {
485	no strict 'refs';	1074	no strict 'refs';
486	my ($pkg, @funs) = @$_;	1075	my ($pkg, @funs) = @$_;
487	*{"ext::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})	1076	*{"safe::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})
488	for @funs;	1077	for @funs;
489	}	1078	}
		1079
		1080	=over 4
		1081
		1082	=item @retval = safe_eval $code, [var => value, ...]
		1083
		1084	Compiled and executes the given perl code snippet. additional var/value
		1085	pairs result in temporary local (my) scalar variables of the given name
		1086	that are available in the code snippet. Example:
		1087
		1088	my $five = safe_eval '$first + $second', first => 1, second => 4;
		1089
		1090	=cut
490		1091
491	sub safe_eval($;@) {	1092	sub safe_eval($;@) {
492	my ($code, %vars) = @_;	1093	my ($code, %vars) = @_;
493		1094
494	my $qcode = $code;	1095	my $qcode = $code;
495	$qcode =~ s/"/‟/g; # not allowed in #line filenames	1096	$qcode =~ s/"/‟/g; # not allowed in #line filenames
496	$qcode =~ s/\n/\\n/g;	1097	$qcode =~ s/\n/\\n/g;
497		1098
498	local $_;	1099	local $_;
499	local @ext::cf::_safe_eval_args = values %vars;	1100	local @safe::cf::_safe_eval_args = values %vars;
500		1101
501	$code =	1102	my $eval =
502	"do {\n"	1103	"do {\n"
503	. "my (" . (join ",", map "\$$_", keys %vars) . ") = \@cf::_safe_eval_args;\n"	1104	. "my (" . (join ",", map "\$$_", keys %vars) . ") = \@cf::_safe_eval_args;\n"
504	. "#line 0 \"{$qcode}\"\n"	1105	. "#line 0 \"{$qcode}\"\n"
505	. $code	1106	. $code
506	. "\n}"	1107	. "\n}"
507	;	1108	;
508		1109
509	sub_generation_inc;	1110	sub_generation_inc;
510	my @res = wantarray ? $safe->reval ($code) : scalar $safe->reval ($code);	1111	my @res = wantarray ? $safe->reval ($eval) : scalar $safe->reval ($eval);
511	sub_generation_inc;	1112	sub_generation_inc;
512		1113
		1114	if ($@) {
		1115	warn "$@";
		1116	warn "while executing safe code '$code'\n";
		1117	warn "with arguments " . (join " ", %vars) . "\n";
		1118	}
		1119
513	wantarray ? @res : $res[0]	1120	wantarray ? @res : $res[0]
514	}	1121	}
		1122
		1123	=item cf::register_script_function $function => $cb
		1124
		1125	Register a function that can be called from within map/npc scripts. The
		1126	function should be reasonably secure and should be put into a package name
		1127	like the extension.
		1128
		1129	Example: register a function that gets called whenever a map script calls
		1130	C<rent::overview>, as used by the C<rent> extension.
		1131
		1132	cf::register_script_function "rent::overview" => sub {
		1133	...
		1134	};
		1135
		1136	=cut
515		1137
516	sub register_script_function {	1138	sub register_script_function {
517	my ($fun, $cb) = @_;	1139	my ($fun, $cb) = @_;
518		1140
519	no strict 'refs';	1141	no strict 'refs';
520	*{"ext::$fun"} = $safe_hole->wrap ($cb);	1142	*{"safe::$fun"} = $safe_hole->wrap ($cb);
		1143	}
		1144
		1145	=back
		1146
		1147	=cut
		1148
		1149	#############################################################################
		1150
		1151	=head2 EXTENSION DATABASE SUPPORT
		1152
		1153	Crossfire maintains a very simple database for extension use. It can
		1154	currently store anything that can be serialised using Storable, which
		1155	excludes objects.
		1156
		1157	The parameter C<$family> should best start with the name of the extension
		1158	using it, it should be unique.
		1159
		1160	=over 4
		1161
		1162	=item $hashref = cf::db_get $family
		1163
		1164	Return a hashref for use by the extension C<$family>, which can be
		1165	modified. After modifications, you have to call C<cf::db_dirty> or
		1166	C<cf::db_sync>.
		1167
		1168	=item $value = cf::db_get $family => $key
		1169
		1170	Returns a single value from the database
		1171
		1172	=item cf::db_put $family => $hashref
		1173
		1174	Stores the given family hashref into the database. Updates are delayed, if
		1175	you want the data to be synced to disk immediately, use C<cf::db_sync>.
		1176
		1177	=item cf::db_put $family => $key => $value
		1178
		1179	Stores the given C<$value> in the family hash. Updates are delayed, if you
		1180	want the data to be synced to disk immediately, use C<cf::db_sync>.
		1181
		1182	=item cf::db_dirty
		1183
		1184	Marks the database as dirty, to be updated at a later time.
		1185
		1186	=item cf::db_sync
		1187
		1188	Immediately write the database to disk I<if it is dirty>.
		1189
		1190	=cut
		1191
		1192	our $DB;
		1193
		1194	{
		1195	my $path = cf::localdir . "/database.pst";
		1196
		1197	sub db_load() {
		1198	warn "loading database $path\n";#d# remove later
		1199	$DB = stat $path ? Storable::retrieve $path : { };
		1200	}
		1201
		1202	my $pid;
		1203
		1204	sub db_save() {
		1205	warn "saving database $path\n";#d# remove later
		1206	waitpid $pid, 0 if $pid;
		1207	if (0 == ($pid = fork)) {
		1208	$DB->{_meta}{version} = 1;
		1209	Storable::nstore $DB, "$path~";
		1210	rename "$path~", $path;
		1211	cf::_exit 0 if defined $pid;
		1212	}
		1213	}
		1214
		1215	my $dirty;
		1216
		1217	sub db_sync() {
		1218	db_save if $dirty;
		1219	undef $dirty;
		1220	}
		1221
		1222	my $idle = Event->idle (min => $TICK * 2.8, max => 10, repeat => 0, data => WF_AUTOCANCEL, cb => sub {
		1223	db_sync;
		1224	});
		1225
		1226	sub db_dirty() {
		1227	$dirty = 1;
		1228	$idle->start;
		1229	}
		1230
		1231	sub db_get($;$) {
		1232	@_ >= 2
		1233	? $DB->{$_[0]}{$_[1]}
		1234	: ($DB->{$_[0]} ||= { })
		1235	}
		1236
		1237	sub db_put($$;$) {
		1238	if (@_ >= 3) {
		1239	$DB->{$_[0]}{$_[1]} = $_[2];
		1240	} else {
		1241	$DB->{$_[0]} = $_[1];
		1242	}
		1243	db_dirty;
		1244	}
		1245
		1246	cf::global->attach (
		1247	prio => 10000,
		1248	on_cleanup => sub {
		1249	db_sync;
		1250	},
		1251	);
521	}	1252	}
522		1253
523	#############################################################################	1254	#############################################################################
524	# the server's main()	1255	# the server's main()
525		1256
526	sub run {	1257	sub cfg_load {
		1258	open my $fh, "<:utf8", cf::confdir . "/config"
		1259	or return;
		1260
		1261	local $/;
		1262	*CFG = YAML::Syck::Load <$fh>;
		1263	}
		1264
		1265	sub main {
		1266	cfg_load;
		1267	db_load;
		1268	load_extensions;
527	Event::loop;	1269	Event::loop;
528	}	1270	}
529		1271
530	#############################################################################	1272	#############################################################################
531	# initialisation	1273	# initialisation
532		1274
		1275	sub _perl_reload() {
		1276	warn "reloading...";
		1277
		1278	eval {
		1279	local $FREEZE = 1;
		1280
		1281	cf::emergency_save;
		1282
		1283	# cancel all watchers
		1284	for (Event::all_watchers) {
		1285	$_->cancel if $_->data & WF_AUTOCANCEL;
		1286	}
		1287
		1288	# cancel all extension coros
		1289	$_->cancel for values %EXT_CORO;
		1290	%EXT_CORO = ();
		1291
		1292	# unload all extensions
		1293	for (@exts) {
		1294	warn "unloading <$_>";
		1295	unload_extension $_;
		1296	}
		1297
		1298	# unload all modules loaded from $LIBDIR
		1299	while (my ($k, $v) = each %INC) {
		1300	next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;
		1301
		1302	warn "removing <$k>";
		1303	delete $INC{$k};
		1304
		1305	$k =~ s/\.pm$//;
		1306	$k =~ s/\//::/g;
		1307
		1308	if (my $cb = $k->can ("unload_module")) {
		1309	$cb->();
		1310	}
		1311
		1312	Symbol::delete_package $k;
		1313	}
		1314
		1315	# sync database to disk
		1316	cf::db_sync;
		1317	IO::AIO::flush;
		1318
		1319	# get rid of safe::, as good as possible
		1320	Symbol::delete_package "safe::$_"
		1321	for qw(cf::attachable cf::object cf::object::player cf::client cf::player cf::map cf::party cf::region);
		1322
		1323	# remove register_script_function callbacks
		1324	# TODO
		1325
		1326	# unload cf.pm "a bit"
		1327	delete $INC{"cf.pm"};
		1328
		1329	# don't, removes xs symbols, too,
		1330	# and global variables created in xs
		1331	#Symbol::delete_package __PACKAGE__;
		1332
		1333	# reload cf.pm
		1334	warn "reloading cf.pm";
		1335	require cf;
		1336	cf::_connect_to_perl; # nominally unnecessary, but cannot hurt
		1337
		1338	# load config and database again
		1339	cf::cfg_load;
		1340	cf::db_load;
		1341
		1342	# load extensions
		1343	warn "load extensions";
		1344	cf::load_extensions;
		1345
		1346	# reattach attachments to objects
		1347	warn "reattach";
		1348	_global_reattach;
		1349	};
		1350	warn $@ if $@;
		1351
		1352	warn "reloaded";
		1353	};
		1354
		1355	sub perl_reload() {
		1356	_perl_reload;
		1357	}
		1358
533	register "<global>", __PACKAGE__;	1359	register "<global>", __PACKAGE__;
534		1360
		1361	register_command "perl-reload" => sub {
		1362	my ($who, $arg) = @_;
		1363
		1364	if ($who->flag (FLAG_WIZ)) {
		1365	$who->message ("reloading...");
		1366	_perl_reload;
		1367	}
		1368	};
		1369
535	unshift @INC, $LIBDIR;	1370	unshift @INC, $LIBDIR;
536		1371
537	load_extensions;
538
539	$TICK_WATCHER = Event->timer (	1372	$TICK_WATCHER = Event->timer (
		1373	reentrant => 0,
540	prio => 1,	1374	prio => 0,
541	at => $NEXT_TICK || 1,	1375	at => $NEXT_TICK || $TICK,
		1376	data => WF_AUTOCANCEL,
542	cb => sub {	1377	cb => sub {
		1378	unless ($FREEZE) {
543	cf::server_tick; # one server iteration	1379	cf::server_tick; # one server iteration
		1380	$RUNTIME += $TICK;
		1381	}
544		1382
545	my $NOW = Event::time;
546	$NEXT_TICK += $TICK;	1383	$NEXT_TICK += $TICK;
547		1384
548	# if we are delayed by > 0.25 second, skip ticks	1385	# if we are delayed by four ticks or more, skip them all
549	$NEXT_TICK = $NOW if $NOW >= $NEXT_TICK + .25;	1386	$NEXT_TICK = Event::time if Event::time >= $NEXT_TICK + $TICK * 4;
550		1387
551	$TICK_WATCHER->at ($NEXT_TICK);	1388	$TICK_WATCHER->at ($NEXT_TICK);
552	$TICK_WATCHER->start;	1389	$TICK_WATCHER->start;
553	},	1390	},
554	);	1391	);
555		1392
		1393	IO::AIO::max_poll_time $TICK * 0.2;
		1394
		1395	Event->io (fd => IO::AIO::poll_fileno,
		1396	poll => 'r',
		1397	prio => 5,
		1398	data => WF_AUTOCANCEL,
		1399	cb => \&IO::AIO::poll_cb);
		1400
		1401	# we must not ever block the main coroutine
		1402	$Coro::idle = sub {
		1403	#Carp::cluck "FATAL: Coro::idle was called, major BUG\n";#d#
		1404	warn "FATAL: Coro::idle was called, major BUG\n";
		1405	(Coro::unblock_sub {
		1406	Event::one_event;
		1407	})->();
		1408	};
		1409
556	1	1410	1
557		1411

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