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Comparing deliantra/server/lib/cf.pm (file contents):
Revision 1.80 by root, Tue Nov 7 16:30:55 2006 UTC vs.
Revision 1.263 by root, Sat May 5 05:40:27 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 Socket;
5	use Storable;	9	use Storable;
		10	use Event;
6	use Opcode;	11	use Opcode;
7	use Safe;	12	use Safe;
8	use Safe::Hole;	13	use Safe::Hole;
9		14
10	use IO::AIO ();	15	use Coro 3.61 ();
		16	use Coro::State;
		17	use Coro::Handle;
		18	use Coro::Event;
		19	use Coro::Timer;
		20	use Coro::Signal;
		21	use Coro::Semaphore;
		22	use Coro::AIO;
		23	use Coro::Storable;
		24
		25	use BDB ();
		26	use Data::Dumper;
		27	use Digest::MD5;
		28	use Fcntl;
11	use YAML::Syck ();	29	use YAML::Syck ();
		30	use IO::AIO 2.32 ();
12	use Time::HiRes;	31	use Time::HiRes;
13	use Event;	32	use Compress::LZF;
		33
		34	# configure various modules to our taste
		35	#
		36	$Storable::canonical = 1; # reduce rsync transfers
		37	Coro::State::cctx_stacksize 256000; # 1-2MB stack, for deep recursions in maze generator
		38	Compress::LZF::sfreeze_cr { }; # prime Compress::LZF so it does not use require later
		39
14	$Event::Eval = 1; # no idea why this is required, but it is	40	$Event::Eval = 1; # no idea why this is required, but it is
15		41
16	# work around bug in YAML::Syck - bad news for perl6, will it be as broken wrt. unicode?	42	# work around bug in YAML::Syck - bad news for perl6, will it be as broken wrt. unicode?
17	$YAML::Syck::ImplicitUnicode = 1;	43	$YAML::Syck::ImplicitUnicode = 1;
18		44
19	use strict;	45	$Coro::main->prio (Coro::PRIO_MAX); # run main coroutine ("the server") with very high priority
20		46
21	_init_vars;	47	sub WF_AUTOCANCEL () { 1 } # automatically cancel this watcher on reload
22		48
23	our %COMMAND = ();	49	our %COMMAND = ();
		50	our %COMMAND_TIME = ();
		51
		52	our @EXTS = (); # list of extension package names
		53	our %EXTCMD = ();
		54	our %EXT_CORO = (); # coroutines bound to extensions
		55	our %EXT_MAP = (); # pluggable maps
		56
		57	our $RELOAD; # number of reloads so far
24	our @EVENT;	58	our @EVENT;
25	our $LIBDIR = maps_directory "perl";
26		59
27	our $TICK = MAX_TIME * 1e-6;	60	our $CONFDIR = confdir;
		61	our $DATADIR = datadir;
		62	our $LIBDIR = "$DATADIR/ext";
		63	our $PODDIR = "$DATADIR/pod";
		64	our $MAPDIR = "$DATADIR/" . mapdir;
		65	our $LOCALDIR = localdir;
		66	our $TMPDIR = "$LOCALDIR/" . tmpdir;
		67	our $UNIQUEDIR = "$LOCALDIR/" . uniquedir;
		68	our $PLAYERDIR = "$LOCALDIR/" . playerdir;
		69	our $RANDOMDIR = "$LOCALDIR/random";
		70	our $BDBDIR = "$LOCALDIR/db";
		71
		72	our $TICK = MAX_TIME * 1e-6; # this is a CONSTANT(!)
28	our $TICK_WATCHER;	73	our $TICK_WATCHER;
		74	our $AIO_POLL_WATCHER;
		75	our $NEXT_RUNTIME_WRITE; # when should the runtime file be written
29	our $NEXT_TICK;	76	our $NEXT_TICK;
		77	our $NOW;
		78	our $USE_FSYNC = 1; # use fsync to write maps - default off
		79
		80	our $BDB_POLL_WATCHER;
		81	our $DB_ENV;
30		82
31	our %CFG;	83	our %CFG;
32		84
33	our $uptime;	85	our $UPTIME; $UPTIME ||= time;
		86	our $RUNTIME;
34		87
35	$uptime ||= time;	88	our %PLAYER; # all users
		89	our %MAP; # all maps
		90	our $LINK_MAP; # the special {link} map, which is always available
		91
		92	# used to convert map paths into valid unix filenames by replacing / by ∕
		93	our $PATH_SEP = "∕"; # U+2215, chosen purely for visual reasons
		94
		95	binmode STDOUT;
		96	binmode STDERR;
		97
		98	# read virtual server time, if available
		99	unless ($RUNTIME || !-e "$LOCALDIR/runtime") {
		100	open my $fh, "<", "$LOCALDIR/runtime"
		101	or die "unable to read runtime file: $!";
		102	$RUNTIME = <$fh> + 0.;
		103	}
		104
		105	mkdir $_
		106	for $LOCALDIR, $TMPDIR, $UNIQUEDIR, $PLAYERDIR, $RANDOMDIR, $BDBDIR;
		107
		108	our $EMERGENCY_POSITION;
		109
		110	sub cf::map::normalise;
36		111
37	#############################################################################	112	#############################################################################
38		113
39	=head2 GLOBAL VARIABLES	114	=head2 GLOBAL VARIABLES
40		115
41	=over 4	116	=over 4
42		117
43	=item $cf::LIBDIR	118	=item $cf::UPTIME
44		119
45	The perl library directory, where extensions and cf-specific modules can	120	The timestamp of the server start (so not actually an uptime).
46	be found. It will be added to C<@INC> automatically.	121
		122	=item $cf::RUNTIME
		123
		124	The time this server has run, starts at 0 and is increased by $cf::TICK on
		125	every server tick.
		126
		127	=item $cf::CONFDIR $cf::DATADIR $cf::LIBDIR $cf::PODDIR
		128	$cf::MAPDIR $cf::LOCALDIR $cf::TMPDIR $cf::UNIQUEDIR
		129	$cf::PLAYERDIR $cf::RANDOMDIR $cf::BDBDIR
		130
		131	Various directories - "/etc", read-only install directory, perl-library
		132	directory, pod-directory, read-only maps directory, "/var", "/var/tmp",
		133	unique-items directory, player file directory, random maps directory and
		134	database environment.
		135
		136	=item $cf::NOW
		137
		138	The time of the last (current) server tick.
47		139
48	=item $cf::TICK	140	=item $cf::TICK
49		141
50	The interval between server ticks, in seconds.	142	The interval between server ticks, in seconds.
51		143
52	=item %cf::CFG	144	=item %cf::CFG
53		145
54	Configuration for the server, loaded from C</etc/crossfire/config>, or	146	Configuration for the server, loaded from C</etc/crossfire/config>, or
55	from wherever your confdir points to.	147	from wherever your confdir points to.
		148
		149	=item cf::wait_for_tick, cf::wait_for_tick_begin
		150
		151	These are functions that inhibit the current coroutine one tick. cf::wait_for_tick_begin only
		152	returns directly I<after> the tick processing (and consequently, can only wake one process
		153	per tick), while cf::wait_for_tick wakes up all waiters after tick processing.
56		154
57	=back	155	=back
58		156
59	=cut	157	=cut
60		158
61	BEGIN {	159	BEGIN {
62	*CORE::GLOBAL::warn = sub {	160	*CORE::GLOBAL::warn = sub {
63	my $msg = join "", @_;	161	my $msg = join "", @_;
		162
64	$msg .= "\n"	163	$msg .= "\n"
65	unless $msg =~ /\n$/;	164	unless $msg =~ /\n$/;
66		165
67	print STDERR "cfperl: $msg";	166	$msg =~ s/([\x00-\x08\x0b-\x1f])/sprintf "\\x%02x", ord $1/ge;
		167
		168	utf8::encode $msg;
68	LOG llevError, "cfperl: $msg";	169	LOG llevError, $msg;
69	};	170	};
70	}	171	}
71		172
		173	@safe::cf::global::ISA = @cf::global::ISA = 'cf::attachable';
		174	@safe::cf::object::ISA = @cf::object::ISA = 'cf::attachable';
		175	@safe::cf::player::ISA = @cf::player::ISA = 'cf::attachable';
		176	@safe::cf::client::ISA = @cf::client::ISA = 'cf::attachable';
		177	@safe::cf::map::ISA = @cf::map::ISA = 'cf::attachable';
72	@safe::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object';	178	@safe::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object';
73		179
74	# we bless all objects into (empty) derived classes to force a method lookup	180	# we bless all objects into (empty) derived classes to force a method lookup
75	# within the Safe compartment.	181	# within the Safe compartment.
76	for my $pkg (qw(cf::object cf::object::player cf::player cf::map cf::party cf::region cf::arch cf::living)) {	182	for my $pkg (qw(
		183	cf::global cf::attachable
		184	cf::object cf::object::player
		185	cf::client cf::player
		186	cf::arch cf::living
		187	cf::map cf::party cf::region
		188	)) {
77	no strict 'refs';	189	no strict 'refs';
78	@{"safe::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;	190	@{"safe::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;
79	}	191	}
80		192
81	$Event::DIED = sub {	193	$Event::DIED = sub {
82	warn "error in event callback: @_";	194	warn "error in event callback: @_";
83	};	195	};
84		196
85	my %ext_pkg;
86	my @exts;
87	my @hook;
88	my %command;
89	my %extcmd;
90
91	=head2 UTILITY FUNCTIONS	197	=head2 UTILITY FUNCTIONS
92		198
93	=over 4	199	=over 4
94		200
95	=cut	201	=item dumpval $ref
96		202
		203	=cut
		204
		205	sub dumpval {
		206	eval {
		207	local $SIG{__DIE__};
		208	my $d;
		209	if (1) {
		210	$d = new Data::Dumper([$_[0]], ["*var"]);
		211	$d->Terse(1);
		212	$d->Indent(2);
		213	$d->Quotekeys(0);
		214	$d->Useqq(1);
		215	#$d->Bless(...);
		216	$d->Seen($_[1]) if @_ > 1;
		217	$d = $d->Dump();
		218	}
		219	$d =~ s/([\x00-\x07\x09\x0b\x0c\x0e-\x1f])/sprintf "\\x%02x", ord($1)/ge;
		220	$d
		221	} || "[unable to dump $_[0]: '$@']";
		222	}
		223
97	use JSON::Syck (); # TODO# replace by JSON::PC once working	224	use JSON::XS qw(to_json from_json); # TODO# replace by JSON::PC once working
98		225
99	=item $ref = cf::from_json $json	226	=item $ref = cf::from_json $json
100		227
101	Converts a JSON string into the corresponding perl data structure.	228	Converts a JSON string into the corresponding perl data structure.
102		229
103	=cut
104
105	sub from_json($) {
106	$JSON::Syck::ImplicitUnicode = 1; # work around JSON::Syck bugs
107	JSON::Syck::Load $_[0]
108	}
109
110	=item $json = cf::to_json $ref	230	=item $json = cf::to_json $ref
111		231
112	Converts a perl data structure into its JSON representation.	232	Converts a perl data structure into its JSON representation.
113		233
114	=cut	234	=item cf::lock_wait $string
115		235
116	sub to_json($) {	236	Wait until the given lock is available. See cf::lock_acquire.
117	$JSON::Syck::ImplicitUnicode = 0; # work around JSON::Syck bugs	237
118	JSON::Syck::Dump $_[0]	238	=item my $lock = cf::lock_acquire $string
		239
		240	Wait until the given lock is available and then acquires it and returns
		241	a Coro::guard object. If the guard object gets destroyed (goes out of scope,
		242	for example when the coroutine gets canceled), the lock is automatically
		243	returned.
		244
		245	Lock names should begin with a unique identifier (for example, cf::map::find
		246	uses map_find and cf::map::load uses map_load).
		247
		248	=item $locked = cf::lock_active $string
		249
		250	Return true if the lock is currently active, i.e. somebody has locked it.
		251
		252	=cut
		253
		254	our %LOCK;
		255
		256	sub lock_wait($) {
		257	my ($key) = @_;
		258
		259	# wait for lock, if any
		260	while ($LOCK{$key}) {
		261	push @{ $LOCK{$key} }, $Coro::current;
		262	Coro::schedule;
		263	}
		264	}
		265
		266	sub lock_acquire($) {
		267	my ($key) = @_;
		268
		269	# wait, to be sure we are not locked
		270	lock_wait $key;
		271
		272	$LOCK{$key} = [];
		273
		274	Coro::guard {
		275	# wake up all waiters, to be on the safe side
		276	$_->ready for @{ delete $LOCK{$key} };
		277	}
		278	}
		279
		280	sub lock_active($) {
		281	my ($key) = @_;
		282
		283	! ! $LOCK{$key}
		284	}
		285
		286	sub freeze_mainloop {
		287	return unless $TICK_WATCHER->is_active;
		288
		289	my $guard = Coro::guard {
		290	$TICK_WATCHER->start;
		291	};
		292	$TICK_WATCHER->stop;
		293	$guard
		294	}
		295
		296	=item cf::async { BLOCK }
		297
		298	Currently the same as Coro::async_pool, meaning you cannot use
		299	C<on_destroy>, C<join> or other gimmicks on these coroutines. The only
		300	thing you are allowed to do is call C<prio> on it.
		301
		302	=cut
		303
		304	BEGIN { *async = \&Coro::async_pool }
		305
		306	=item cf::sync_job { BLOCK }
		307
		308	The design of crossfire+ requires that the main coro ($Coro::main) is
		309	always able to handle events or runnable, as crossfire+ is only partly
		310	reentrant. Thus "blocking" it by e.g. waiting for I/O is not acceptable.
		311
		312	If it must be done, put the blocking parts into C<sync_job>. This will run
		313	the given BLOCK in another coroutine while waiting for the result. The
		314	server will be frozen during this time, so the block should either finish
		315	fast or be very important.
		316
		317	=cut
		318
		319	sub sync_job(&) {
		320	my ($job) = @_;
		321
		322	if ($Coro::current == $Coro::main) {
		323	# this is the main coro, too bad, we have to block
		324	# till the operation succeeds, freezing the server :/
		325
		326	# TODO: use suspend/resume instead
		327	# (but this is cancel-safe)
		328	my $freeze_guard = freeze_mainloop;
		329
		330	my $busy = 1;
		331	my @res;
		332
		333	(async {
		334	@res = eval { $job->() };
		335	warn $@ if $@;
		336	undef $busy;
		337	})->prio (Coro::PRIO_MAX);
		338
		339	while ($busy) {
		340	Coro::cede or Event::one_event;
		341	}
		342
		343	wantarray ? @res : $res[0]
		344	} else {
		345	# we are in another coroutine, how wonderful, everything just works
		346
		347	$job->()
		348	}
		349	}
		350
		351	=item $coro = cf::async_ext { BLOCK }
		352
		353	Like async, but this coro is automatically being canceled when the
		354	extension calling this is being unloaded.
		355
		356	=cut
		357
		358	sub async_ext(&) {
		359	my $cb = shift;
		360
		361	my $coro = &Coro::async ($cb);
		362
		363	$coro->on_destroy (sub {
		364	delete $EXT_CORO{$coro+0};
		365	});
		366	$EXT_CORO{$coro+0} = $coro;
		367
		368	$coro
		369	}
		370
		371	sub write_runtime {
		372	my $guard = cf::lock_acquire "write_runtime";
		373
		374	my $runtime = "$LOCALDIR/runtime";
		375
		376	warn "starting to write runtime...\n";#d#
		377	my $fh = aio_open "$runtime~", O_WRONLY | O_CREAT, 0644
		378	or return;
		379
		380	my $value = $cf::RUNTIME + 90 + 10;
		381	# 10 is the runtime save interval, for a monotonic clock
		382	# 60 allows for the watchdog to kill the server.
		383
		384	(aio_write $fh, 0, (length $value), $value, 0) <= 0
		385	and return;
		386
		387	# always fsync - this file is important
		388	aio_fsync $fh
		389	and return;
		390
		391	close $fh
		392	or return;
		393
		394	aio_rename "$runtime~", $runtime
		395	and return;
		396
		397	warn "... done writing runtime.\n";#d#
		398
		399	1
		400	}
		401
		402	=item cf::datalog type => key => value, ...
		403
		404	Log a datalog packet of the given type with the given key-value pairs.
		405
		406	=cut
		407
		408	sub datalog($@) {
		409	my ($type, %kv) = @_;
		410	warn "DATALOG ", JSON::XS->new->ascii->encode ({ %kv, type => $type });
119	}	411	}
120		412
121	=back	413	=back
122		414
123	=cut	415	=cut
124		416
125	#############################################################################	417	#############################################################################
126		418
127	=head2 EVENTS AND OBJECT ATTACHMENTS	419	=head2 ATTACHABLE OBJECTS
		420
		421	Many objects in crossfire are so-called attachable objects. That means you can
		422	attach callbacks/event handlers (a collection of which is called an "attachment")
		423	to it. All such attachable objects support the following methods.
		424
		425	In the following description, CLASS can be any of C<global>, C<object>
		426	C<player>, C<client> or C<map> (i.e. the attachable objects in
		427	crossfire+).
128		428
129	=over 4	429	=over 4
130		430
131	=item $object->attach ($attachment, key => $value...)
132
133	=item $object->detach ($attachment)
134
135	Attach/detach a pre-registered attachment to an object.
136
137	=item $player->attach ($attachment, key => $value...)
138
139	=item $player->detach ($attachment)
140
141	Attach/detach a pre-registered attachment to a player.
142
143	=item $map->attach ($attachment, key => $value...)	431	=item $attachable->attach ($attachment, key => $value...)
144		432
145	=item $map->detach ($attachment)	433	=item $attachable->detach ($attachment)
146		434
147	Attach/detach a pre-registered attachment to a map.	435	Attach/detach a pre-registered attachment to a specific object and give it
		436	the specified key/value pairs as arguments.
148		437
149	=item $bool = $object->attached ($name)	438	Example, attach a minesweeper attachment to the given object, making it a
		439	10x10 minesweeper game:
150		440
151	=item $bool = $player->attached ($name)	441	$obj->attach (minesweeper => width => 10, height => 10);
152		442
153	=item $bool = $map->attached ($name)	443	=item $bool = $attachable->attached ($name)
154		444
155	Checks wether the named attachment is currently attached to the object.	445	Checks wether the named attachment is currently attached to the object.
156		446
157	=item cf::attach_global ...	447	=item cf::CLASS->attach ...
158		448
159	Attach handlers for global events.	449	=item cf::CLASS->detach ...
160		450
161	This and all following C<attach_*>-functions expect any number of the	451	Define an anonymous attachment and attach it to all objects of the given
162	following handler/hook descriptions:	452	CLASS. See the next function for an explanation of its arguments.
		453
		454	You can attach to global events by using the C<cf::global> class.
		455
		456	Example, log all player logins:
		457
		458	cf::player->attach (
		459	on_login => sub {
		460	my ($pl) = @_;
		461	...
		462	},
		463	);
		464
		465	Example, attach to the jeweler skill:
		466
		467	cf::object->attach (
		468	type => cf::SKILL,
		469	subtype => cf::SK_JEWELER,
		470	on_use_skill => sub {
		471	my ($sk, $ob, $part, $dir, $msg) = @_;
		472	...
		473	},
		474	);
		475
		476	=item cf::CLASS::attachment $name, ...
		477
		478	Register an attachment by C<$name> through which attachable objects of the
		479	given CLASS can refer to this attachment.
		480
		481	Some classes such as crossfire maps and objects can specify attachments
		482	that are attached at load/instantiate time, thus the need for a name.
		483
		484	These calls expect any number of the following handler/hook descriptions:
163		485
164	=over 4	486	=over 4
165		487
166	=item prio => $number	488	=item prio => $number
167		489
…		…
169	by another C<prio> setting). Lower priority handlers get executed	491	by another C<prio> setting). Lower priority handlers get executed
170	earlier. The default priority is C<0>, and many built-in handlers are	492	earlier. The default priority is C<0>, and many built-in handlers are
171	registered at priority C<-1000>, so lower priorities should not be used	493	registered at priority C<-1000>, so lower priorities should not be used
172	unless you know what you are doing.	494	unless you know what you are doing.
173		495
		496	=item type => $type
		497
		498	(Only for C<< cf::object->attach >> calls), limits the attachment to the
		499	given type of objects only (the additional parameter C<subtype> can be
		500	used to further limit to the given subtype).
		501
174	=item on_I<event> => \&cb	502	=item on_I<event> => \&cb
175		503
176	Call the given code reference whenever the named event happens (event is	504	Call the given code reference whenever the named event happens (event is
177	something like C<instantiate>, C<apply>, C<use_skill> and so on, and which	505	something like C<instantiate>, C<apply>, C<use_skill> and so on, and which
178	handlers are recognised generally depends on the type of object these	506	handlers are recognised generally depends on the type of object these
…		…
187	package and register them. Only handlers for eevents supported by the	515	package and register them. Only handlers for eevents supported by the
188	object/class are recognised.	516	object/class are recognised.
189		517
190	=back	518	=back
191		519
192	=item cf::attach_to_type $object_type, $subtype, ...	520	Example, define an attachment called "sockpuppet" that calls the given
		521	event handler when a monster attacks:
193		522
194	Attach handlers for a specific object type (e.g. TRANSPORT) and	523	cf::object::attachment sockpuppet =>
195	subtype. If C<$subtype> is zero or undef, matches all objects of the given	524	on_skill_attack => sub {
196	type.	525	my ($self, $victim) = @_;
197		526	...
198	=item cf::attach_to_objects ...
199
200	Attach handlers to all objects. Do not use this except for debugging or
201	very rare events, as handlers are (obviously) called for I<all> objects in
202	the game.
203
204	=item cf::attach_to_players ...
205
206	Attach handlers to all players.
207
208	=item cf::attach_to_maps ...
209
210	Attach handlers to all maps.
211
212	=item cf:register_attachment $name, ...
213
214	Register an attachment by name through which objects can refer to this
215	attachment.
216
217	=item cf:register_player_attachment $name, ...
218
219	Register an attachment by name through which players can refer to this
220	attachment.
221
222	=item cf:register_map_attachment $name, ...
223
224	Register an attachment by name through which maps can refer to this
225	attachment.
226
227	=cut
228
229	# the following variables are defined in .xs and must not be re-created
230	our @CB_GLOBAL = (); # registry for all global events
231	our @CB_OBJECT = (); # all objects (should not be used except in emergency)
232	our @CB_PLAYER = ();
233	our @CB_TYPE = (); # registry for type (cf-object class) based events
234	our @CB_MAP = ();
235
236	my %attachment;
237
238	sub _attach_cb($\%$$$) {
239	my ($registry, $undo, $event, $prio, $cb) = @_;
240
241	use sort 'stable';
242
243	$cb = [$prio, $cb];
244
245	@{$registry->[$event]} = sort
246	{ $a->[0] cmp $b->[0] }
247	@{$registry->[$event] || []}, $cb;
248
249	push @{$undo->{cb}}, [$event, $cb];
250	}
251
252	# attach handles attaching event callbacks
253	# the only thing the caller has to do is pass the correct
254	# registry (== where the callback attaches to).
255	sub _attach(\@$@) {
256	my ($registry, $klass, @arg) = @_;
257
258	my $prio = 0;
259
260	my %undo = (
261	registry => $registry,
262	cb => [],
263	);
264
265	my %cb_id = map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == $klass, 0 .. $#EVENT;
266
267	while (@arg) {
268	my $type = shift @arg;
269
270	if ($type eq "prio") {
271	$prio = shift @arg;
272
273	} elsif ($type eq "package") {
274	my $pkg = shift @arg;
275
276	while (my ($name, $id) = each %cb_id) {
277	if (my $cb = $pkg->can ($name)) {
278	_attach_cb $registry, %undo, $id, $prio, $cb;
279	}
280	}	527	}
281
282	} elsif (exists $cb_id{$type}) {
283	_attach_cb $registry, %undo, $cb_id{$type}, $prio, shift @arg;
284
285	} elsif (ref $type) {
286	warn "attaching objects not supported, ignoring.\n";
287
288	} else {
289	shift @arg;
290	warn "attach argument '$type' not supported, ignoring.\n";
291	}
292	}
293
294	\%undo
295	}
296
297	sub _attach_attachment {
298	my ($obj, $name, %arg) = @_;
299
300	return if exists $obj->{_attachment}{$name};
301
302	my $res;
303
304	if (my $attach = $attachment{$name}) {
305	my $registry = $obj->registry;
306
307	for (@$attach) {
308	my ($klass, @attach) = @$_;
309	$res = _attach @$registry, $klass, @attach;
310	}
311
312	$obj->{$name} = \%arg;
313	} else {
314	warn "object uses attachment '$name' that is not available, postponing.\n";
315	}
316
317	$obj->{_attachment}{$name} = undef;
318
319	$res->{attachment} = $name;
320	$res
321	}
322
323	*cf::object::attach =
324	*cf::player::attach =
325	*cf::map::attach = sub {
326	my ($obj, $name, %arg) = @_;
327
328	_attach_attachment $obj, $name, %arg;
329	};
330
331	# all those should be optimised
332	*cf::object::detach =
333	*cf::player::detach =
334	*cf::map::detach = sub {
335	my ($obj, $name) = @_;
336
337	delete $obj->{_attachment}{$name};
338	reattach ($obj);
339	};
340
341	*cf::object::attached =
342	*cf::player::attached =
343	*cf::map::attached = sub {
344	my ($obj, $name) = @_;
345
346	exists $obj->{_attachment}{$name}
347	};
348
349	sub attach_global {
350	_attach @CB_GLOBAL, KLASS_GLOBAL, @_
351	}
352
353	sub attach_to_type {
354	my $type = shift;
355	my $subtype = shift;
356
357	_attach @{$CB_TYPE[$type + $subtype * NUM_SUBTYPES]}, KLASS_OBJECT, @_
358	}
359
360	sub attach_to_objects {
361	_attach @CB_OBJECT, KLASS_OBJECT, @_
362	}
363
364	sub attach_to_players {
365	_attach @CB_PLAYER, KLASS_PLAYER, @_
366	}
367
368	sub attach_to_maps {
369	_attach @CB_MAP, KLASS_MAP, @_
370	}
371
372	sub register_attachment {
373	my $name = shift;
374
375	$attachment{$name} = [[KLASS_OBJECT, @_]];
376	}
377
378	sub register_player_attachment {
379	my $name = shift;
380
381	$attachment{$name} = [[KLASS_PLAYER, @_]];
382	}
383
384	sub register_map_attachment {
385	my $name = shift;
386
387	$attachment{$name} = [[KLASS_MAP, @_]];
388	}
389
390	our $override;
391	our @invoke_results = (); # referenced from .xs code. TODO: play tricks with reify and mortals?
392
393	sub override {
394	$override = 1;
395	@invoke_results = ();
396	}
397
398	sub do_invoke {
399	my $event = shift;
400	my $callbacks = shift;
401
402	@invoke_results = ();
403
404	local $override;
405
406	for (@$callbacks) {
407	eval { &{$_->[1]} };
408
409	if ($@) {
410	warn "$@";
411	warn "... while processing $EVENT[$event][0](@_) event, skipping processing altogether.\n";
412	override;
413	}
414
415	return 1 if $override;
416	}
417
418	0	528	}
419	}
420		529
421	=item $bool = cf::invoke EVENT_GLOBAL_XXX, ...	530	=item $attachable->valid
422
423	=item $bool = $object->invoke (EVENT_OBJECT_XXX, ...)
424
425	=item $bool = $player->invoke (EVENT_PLAYER_XXX, ...)
426
427	=item $bool = $map->invoke (EVENT_MAP_XXX, ...)
428
429	Generate a global/object/player/map-specific event with the given arguments.
430
431	This API is preliminary (most likely, the EVENT_KLASS_xxx prefix will be
432	removed in future versions), and there is no public API to access override
433	results (if you must, access C<@cf::invoke_results> directly).
434
435	=back
436
437	=cut
438
439	#############################################################################
440
441	=head2 METHODS VALID FOR ALL CORE OBJECTS
442
443	=over 4
444
445	=item $object->valid, $player->valid, $map->valid
446		531
447	Just because you have a perl object does not mean that the corresponding	532	Just because you have a perl object does not mean that the corresponding
448	C-level object still exists. If you try to access an object that has no	533	C-level object still exists. If you try to access an object that has no
449	valid C counterpart anymore you get an exception at runtime. This method	534	valid C counterpart anymore you get an exception at runtime. This method
450	can be used to test for existence of the C object part without causing an	535	can be used to test for existence of the C object part without causing an
451	exception.	536	exception.
452		537
		538	=cut
		539
		540	# the following variables are defined in .xs and must not be re-created
		541	our @CB_GLOBAL = (); # registry for all global events
		542	our @CB_ATTACHABLE = (); # registry for all attachables
		543	our @CB_OBJECT = (); # all objects (should not be used except in emergency)
		544	our @CB_PLAYER = ();
		545	our @CB_CLIENT = ();
		546	our @CB_TYPE = (); # registry for type (cf-object class) based events
		547	our @CB_MAP = ();
		548
		549	my %attachment;
		550
		551	sub cf::attachable::thawer_merge {
		552	# simply override everything except _meta
		553	local $_[0]{_meta};
		554	%{$_[0]} = %{$_[1]};
		555	}
		556
		557	sub _attach_cb($$$$) {
		558	my ($registry, $event, $prio, $cb) = @_;
		559
		560	use sort 'stable';
		561
		562	$cb = [$prio, $cb];
		563
		564	@{$registry->[$event]} = sort
		565	{ $a->[0] cmp $b->[0] }
		566	@{$registry->[$event] || []}, $cb;
		567	}
		568
		569	# hack
		570	my %attachable_klass = map +($_ => 1), KLASS_OBJECT, KLASS_CLIENT, KLASS_PLAYER, KLASS_MAP;
		571
		572	# attach handles attaching event callbacks
		573	# the only thing the caller has to do is pass the correct
		574	# registry (== where the callback attaches to).
		575	sub _attach {
		576	my ($registry, $klass, @arg) = @_;
		577
		578	my $object_type;
		579	my $prio = 0;
		580	my %cb_id = map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == $klass, 0 .. $#EVENT;
		581
		582	#TODO: get rid of this hack
		583	if ($attachable_klass{$klass}) {
		584	%cb_id = (%cb_id, map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == KLASS_ATTACHABLE, 0 .. $#EVENT);
		585	}
		586
		587	while (@arg) {
		588	my $type = shift @arg;
		589
		590	if ($type eq "prio") {
		591	$prio = shift @arg;
		592
		593	} elsif ($type eq "type") {
		594	$object_type = shift @arg;
		595	$registry = $CB_TYPE[$object_type] ||= [];
		596
		597	} elsif ($type eq "subtype") {
		598	defined $object_type or Carp::croak "subtype specified without type";
		599	my $object_subtype = shift @arg;
		600	$registry = $CB_TYPE[$object_type + $object_subtype * NUM_SUBTYPES] ||= [];
		601
		602	} elsif ($type eq "package") {
		603	my $pkg = shift @arg;
		604
		605	while (my ($name, $id) = each %cb_id) {
		606	if (my $cb = $pkg->can ($name)) {
		607	_attach_cb $registry, $id, $prio, $cb;
		608	}
		609	}
		610
		611	} elsif (exists $cb_id{$type}) {
		612	_attach_cb $registry, $cb_id{$type}, $prio, shift @arg;
		613
		614	} elsif (ref $type) {
		615	warn "attaching objects not supported, ignoring.\n";
		616
		617	} else {
		618	shift @arg;
		619	warn "attach argument '$type' not supported, ignoring.\n";
		620	}
		621	}
		622	}
		623
		624	sub _object_attach {
		625	my ($obj, $name, %arg) = @_;
		626
		627	return if exists $obj->{_attachment}{$name};
		628
		629	if (my $attach = $attachment{$name}) {
		630	my $registry = $obj->registry;
		631
		632	for (@$attach) {
		633	my ($klass, @attach) = @$_;
		634	_attach $registry, $klass, @attach;
		635	}
		636
		637	$obj->{$name} = \%arg;
		638	} else {
		639	warn "object uses attachment '$name' that is not available, postponing.\n";
		640	}
		641
		642	$obj->{_attachment}{$name} = undef;
		643	}
		644
		645	sub cf::attachable::attach {
		646	if (ref $_[0]) {
		647	_object_attach @_;
		648	} else {
		649	_attach shift->_attach_registry, @_;
		650	}
		651	};
		652
		653	# all those should be optimised
		654	sub cf::attachable::detach {
		655	my ($obj, $name) = @_;
		656
		657	if (ref $obj) {
		658	delete $obj->{_attachment}{$name};
		659	reattach ($obj);
		660	} else {
		661	Carp::croak "cannot, currently, detach class attachments";
		662	}
		663	};
		664
		665	sub cf::attachable::attached {
		666	my ($obj, $name) = @_;
		667
		668	exists $obj->{_attachment}{$name}
		669	}
		670
		671	for my $klass (qw(ATTACHABLE GLOBAL OBJECT PLAYER CLIENT MAP)) {
		672	eval "#line " . __LINE__ . " 'cf.pm'
		673	sub cf::\L$klass\E::_attach_registry {
		674	(\\\@CB_$klass, KLASS_$klass)
		675	}
		676
		677	sub cf::\L$klass\E::attachment {
		678	my \$name = shift;
		679
		680	\$attachment{\$name} = [[KLASS_$klass, \@_]];
		681	}
		682	";
		683	die if $@;
		684	}
		685
		686	our $override;
		687	our @invoke_results = (); # referenced from .xs code. TODO: play tricks with reify and mortals?
		688
		689	sub override {
		690	$override = 1;
		691	@invoke_results = ();
		692	}
		693
		694	sub do_invoke {
		695	my $event = shift;
		696	my $callbacks = shift;
		697
		698	@invoke_results = ();
		699
		700	local $override;
		701
		702	for (@$callbacks) {
		703	eval { &{$_->[1]} };
		704
		705	if ($@) {
		706	warn "$@";
		707	warn "... while processing $EVENT[$event][0](@_) event, skipping processing altogether.\n";
		708	override;
		709	}
		710
		711	return 1 if $override;
		712	}
		713
		714	0
		715	}
		716
		717	=item $bool = cf::global::invoke (EVENT_CLASS_XXX, ...)
		718
		719	=item $bool = $attachable->invoke (EVENT_CLASS_XXX, ...)
		720
		721	Generate an object-specific event with the given arguments.
		722
		723	This API is preliminary (most likely, the EVENT_CLASS_xxx prefix will be
		724	removed in future versions), and there is no public API to access override
		725	results (if you must, access C<@cf::invoke_results> directly).
		726
453	=back	727	=back
454		728
455	=cut	729	=cut
456
457	*cf::object::valid =
458	*cf::player::valid =
459	*cf::map::valid = \&cf::_valid;
460		730
461	#############################################################################	731	#############################################################################
462	# object support	732	# object support
463		733
464	sub instantiate {
465	my ($obj, $data) = @_;
466
467	$data = from_json $data;
468
469	for (@$data) {
470	my ($name, $args) = @$_;
471
472	$obj->attach ($name, %{$args || {} });
473	}
474	}
475
476	# basically do the same as instantiate, without calling instantiate
477	sub reattach {	734	sub reattach {
		735	# basically do the same as instantiate, without calling instantiate
478	my ($obj) = @_;	736	my ($obj) = @_;
		737
		738	bless $obj, ref $obj; # re-bless in case extensions have been reloaded
		739
479	my $registry = $obj->registry;	740	my $registry = $obj->registry;
480		741
481	@$registry = ();	742	@$registry = ();
482		743
483	delete $obj->{_attachment} unless scalar keys %{ $obj->{_attachment} || {} };	744	delete $obj->{_attachment} unless scalar keys %{ $obj->{_attachment} || {} };
484		745
485	for my $name (keys %{ $obj->{_attachment} || {} }) {	746	for my $name (keys %{ $obj->{_attachment} || {} }) {
486	if (my $attach = $attachment{$name}) {	747	if (my $attach = $attachment{$name}) {
487	for (@$attach) {	748	for (@$attach) {
488	my ($klass, @attach) = @$_;	749	my ($klass, @attach) = @$_;
489	_attach @$registry, $klass, @attach;	750	_attach $registry, $klass, @attach;
490	}	751	}
491	} else {	752	} else {
492	warn "object uses attachment '$name' that is not available, postponing.\n";	753	warn "object uses attachment '$name' that is not available, postponing.\n";
493	}	754	}
494	}	755	}
495	}	756	}
496		757
497	sub object_freezer_save {	758	cf::attachable->attach (
498	my ($filename, $rdata, $objs) = @_;
499
500	if (length $$rdata) {
501	warn sprintf "saving %s (%d,%d)\n",
502	$filename, length $$rdata, scalar @$objs;
503
504	if (open my $fh, ">:raw", "$filename~") {
505	chmod SAVE_MODE, $fh;
506	syswrite $fh, $$rdata;
507	close $fh;
508
509	if (@$objs && open my $fh, ">:raw", "$filename.pst~") {
510	chmod SAVE_MODE, $fh;
511	syswrite $fh, Storable::nfreeze { version => 1, objs => $objs };
512	close $fh;
513	rename "$filename.pst~", "$filename.pst";
514	} else {
515	unlink "$filename.pst";
516	}
517
518	rename "$filename~", $filename;
519	} else {
520	warn "FATAL: $filename~: $!\n";
521	}
522	} else {
523	unlink $filename;
524	unlink "$filename.pst";
525	}
526	}
527
528	sub object_freezer_as_string {
529	my ($rdata, $objs) = @_;
530
531	use Data::Dumper;
532
533	"$$rdata\n" . Dumper $objs
534	}
535
536	sub object_thawer_load {
537	my ($filename) = @_;
538
539	local $/;
540
541	my $av;
542
543	#TODO: use sysread etc.
544	if (open my $data, "<:raw:perlio", $filename) {
545	$data = <$data>;
546	if (open my $pst, "<:raw:perlio", "$filename.pst") {
547	$av = eval { (Storable::thaw <$pst>)->{objs} };
548	}
549	return ($data, $av);
550	}
551
552	()
553	}
554
555	attach_to_objects
556	prio => -1000000,	759	prio => -1000000,
		760	on_instantiate => sub {
		761	my ($obj, $data) = @_;
		762
		763	$data = from_json $data;
		764
		765	for (@$data) {
		766	my ($name, $args) = @$_;
		767
		768	$obj->attach ($name, %{$args || {} });
		769	}
		770	},
		771	on_reattach => \&reattach,
557	on_clone => sub {	772	on_clone => sub {
558	my ($src, $dst) = @_;	773	my ($src, $dst) = @_;
559		774
560	@{$dst->registry} = @{$src->registry};	775	@{$dst->registry} = @{$src->registry};
561		776
562	%$dst = %$src;	777	%$dst = %$src;
563		778
564	%{$dst->{_attachment}} = %{$src->{_attachment}}	779	%{$dst->{_attachment}} = %{$src->{_attachment}}
565	if exists $src->{_attachment};	780	if exists $src->{_attachment};
566	},	781	},
567	;	782	);
		783
		784	sub object_freezer_save {
		785	my ($filename, $rdata, $objs) = @_;
		786
		787	sync_job {
		788	if (length $$rdata) {
		789	warn sprintf "saving %s (%d,%d)\n",
		790	$filename, length $$rdata, scalar @$objs;
		791
		792	if (my $fh = aio_open "$filename~", O_WRONLY | O_CREAT, 0600) {
		793	chmod SAVE_MODE, $fh;
		794	aio_write $fh, 0, (length $$rdata), $$rdata, 0;
		795	aio_fsync $fh if $cf::USE_FSYNC;
		796	close $fh;
		797
		798	if (@$objs) {
		799	if (my $fh = aio_open "$filename.pst~", O_WRONLY | O_CREAT, 0600) {
		800	chmod SAVE_MODE, $fh;
		801	my $data = Storable::nfreeze { version => 1, objs => $objs };
		802	aio_write $fh, 0, (length $data), $data, 0;
		803	aio_fsync $fh if $cf::USE_FSYNC;
		804	close $fh;
		805	aio_rename "$filename.pst~", "$filename.pst";
		806	}
		807	} else {
		808	aio_unlink "$filename.pst";
		809	}
		810
		811	aio_rename "$filename~", $filename;
		812	} else {
		813	warn "FATAL: $filename~: $!\n";
		814	}
		815	} else {
		816	aio_unlink $filename;
		817	aio_unlink "$filename.pst";
		818	}
		819	}
		820	}
		821
		822	sub object_freezer_as_string {
		823	my ($rdata, $objs) = @_;
		824
		825	use Data::Dumper;
		826
		827	$$rdata . Dumper $objs
		828	}
		829
		830	sub object_thawer_load {
		831	my ($filename) = @_;
		832
		833	my ($data, $av);
		834
		835	(aio_load $filename, $data) >= 0
		836	or return;
		837
		838	unless (aio_stat "$filename.pst") {
		839	(aio_load "$filename.pst", $av) >= 0
		840	or return;
		841	$av = eval { (Storable::thaw $av)->{objs} };
		842	}
		843
		844	warn sprintf "loading %s (%d)\n",
		845	$filename, length $data, scalar @{$av || []};#d#
		846	return ($data, $av);
		847	}
568		848
569	#############################################################################	849	#############################################################################
570	# old plug-in events	850	# command handling &c
571		851
572	sub inject_event {	852	=item cf::register_command $name => \&callback($ob,$args);
573	my $extension = shift;
574	my $event_code = shift;
575		853
576	my $cb = $hook[$event_code]{$extension}	854	Register a callback for execution when the client sends the user command
577	or return;	855	$name.
578		856
579	&$cb	857	=cut
580	}
581
582	sub inject_global_event {
583	my $event = shift;
584
585	my $cb = $hook[$event]
586	or return;
587
588	List::Util::max map &$_, values %$cb
589	}
590
591	sub inject_command {
592	my ($name, $obj, $params) = @_;
593
594	for my $cmd (@{ $command{$name} }) {
595	$cmd->[1]->($obj, $params);
596	}
597
598	-1
599	}
600		858
601	sub register_command {	859	sub register_command {
602	my ($name, $time, $cb) = @_;	860	my ($name, $cb) = @_;
603		861
604	my $caller = caller;	862	my $caller = caller;
605	#warn "registering command '$name/$time' to '$caller'";	863	#warn "registering command '$name/$time' to '$caller'";
606		864
607	push @{ $command{$name} }, [$time, $cb, $caller];	865	push @{ $COMMAND{$name} }, [$caller, $cb];
608	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @{ $command{$name} };
609	}	866	}
		867
		868	=item cf::register_extcmd $name => \&callback($pl,$packet);
		869
		870	Register a callbackf ro execution when the client sends an extcmd packet.
		871
		872	If the callback returns something, it is sent back as if reply was being
		873	called.
		874
		875	=cut
610		876
611	sub register_extcmd {	877	sub register_extcmd {
612	my ($name, $cb) = @_;	878	my ($name, $cb) = @_;
613		879
614	my $caller = caller;	880	$EXTCMD{$name} = $cb;
615	#warn "registering extcmd '$name' to '$caller'";
616
617	$extcmd{$name} = [$cb, $caller];
618	}	881	}
619		882
620	sub register {	883	cf::player->attach (
621	my ($base, $pkg) = @_;	884	on_command => sub {
		885	my ($pl, $name, $params) = @_;
622		886
623	#TODO	887	my $cb = $COMMAND{$name}
624	}	888	or return;
		889
		890	for my $cmd (@$cb) {
		891	$cmd->[1]->($pl->ob, $params);
		892	}
		893
		894	cf::override;
		895	},
		896	on_extcmd => sub {
		897	my ($pl, $buf) = @_;
		898
		899	my $msg = eval { from_json $buf };
		900
		901	if (ref $msg) {
		902	if (my $cb = $EXTCMD{$msg->{msgtype}}) {
		903	if (my %reply = $cb->($pl, $msg)) {
		904	$pl->ext_reply ($msg->{msgid}, %reply);
		905	}
		906	}
		907	} else {
		908	warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";
		909	}
		910
		911	cf::override;
		912	},
		913	);
625		914
626	sub load_extension {	915	sub load_extension {
627	my ($path) = @_;	916	my ($path) = @_;
628		917
629	$path =~ /([^\/\\]+)\.ext$/ or die "$path";	918	$path =~ /([^\/\\]+)\.ext$/ or die "$path";
630	my $base = $1;	919	my $base = $1;
631	my $pkg = $1;	920	my $pkg = $1;
632	$pkg =~ s/[^[:word:]]/_/g;	921	$pkg =~ s/[^[:word:]]/_/g;
633	$pkg = "ext::$pkg";	922	$pkg = "ext::$pkg";
634		923
635	warn "loading '$path' into '$pkg'\n";	924	warn "... loading '$path' into '$pkg'\n";
636		925
637	open my $fh, "<:utf8", $path	926	open my $fh, "<:utf8", $path
638	or die "$path: $!";	927	or die "$path: $!";
639		928
640	my $source =	929	my $source =
641	"package $pkg; use strict; use utf8;\n"	930	"package $pkg; use strict; use utf8;\n"
642	. "#line 1 \"$path\"\n{\n"	931	. "#line 1 \"$path\"\n{\n"
643	. (do { local $/; <$fh> })	932	. (do { local $/; <$fh> })
644	. "\n};\n1";	933	. "\n};\n1";
645		934
646	eval $source	935	unless (eval $source) {
647	or die "$path: $@";	936	my $msg = $@ ? "$path: $@\n"
648		937	: "extension disabled.\n";
649	push @exts, $pkg;	938	if ($source =~ /^#!.*perl.*#.*MANDATORY/m) { # ugly match
650	$ext_pkg{$base} = $pkg;	939	warn $@;
651		940	warn "mandatory extension failed to load, exiting.\n";
652	# no strict 'refs';	941	exit 1;
653	# @{"$pkg\::ISA"} = ext::;	942	}
654		943	die $@;
655	register $base, $pkg;
656	}
657
658	sub unload_extension {
659	my ($pkg) = @_;
660
661	warn "removing extension $pkg\n";
662
663	# remove hooks
664	#TODO
665	# for my $idx (0 .. $#PLUGIN_EVENT) {
666	# delete $hook[$idx]{$pkg};
667	# }	944	}
668		945
669	# remove commands	946	push @EXTS, $pkg;
670	for my $name (keys %command) {
671	my @cb = grep $_->[2] ne $pkg, @{ $command{$name} };
672
673	if (@cb) {
674	$command{$name} = \@cb;
675	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @cb;
676	} else {
677	delete $command{$name};
678	delete $COMMAND{"$name\000"};
679	}
680	}
681
682	# remove extcmds
683	for my $name (grep $extcmd{$_}[1] eq $pkg, keys %extcmd) {
684	delete $extcmd{$name};
685	}
686
687	if (my $cb = $pkg->can ("unload")) {
688	eval {
689	$cb->($pkg);
690	1
691	} or warn "$pkg unloaded, but with errors: $@";
692	}
693
694	Symbol::delete_package $pkg;
695	}	947	}
696		948
697	sub load_extensions {	949	sub load_extensions {
698	my $LIBDIR = maps_directory "perl";
699
700	for my $ext (<$LIBDIR/*.ext>) {	950	for my $ext (<$LIBDIR/*.ext>) {
701	next unless -r $ext;	951	next unless -r $ext;
702	eval {	952	eval {
703	load_extension $ext;	953	load_extension $ext;
704	1	954	1
705	} or warn "$ext not loaded: $@";	955	} or warn "$ext not loaded: $@";
706	}	956	}
707	}	957	}
708		958
709	#############################################################################	959	#############################################################################
710	# extcmd framework, basically convert ext <msg>
711	# into pkg::->on_extcmd_arg1 (...) while shortcutting a few
712		960
713	attach_to_players	961	=head2 CORE EXTENSIONS
714	on_extcmd => sub {	962
		963	Functions and methods that extend core crossfire objects.
		964
		965	=cut
		966
		967	package cf::player;
		968
		969	use Coro::AIO;
		970
		971	=head3 cf::player
		972
		973	=over 4
		974
		975	=item cf::player::find $login
		976
		977	Returns the given player object, loading it if necessary (might block).
		978
		979	=cut
		980
		981	sub playerdir($) {
		982	"$PLAYERDIR/"
		983	. (ref $_[0] ? $_[0]->ob->name : $_[0])
		984	}
		985
		986	sub path($) {
		987	my $login = ref $_[0] ? $_[0]->ob->name : $_[0];
		988
		989	(playerdir $login) . "/playerdata"
		990	}
		991
		992	sub find_active($) {
		993	$cf::PLAYER{$_[0]}
		994	and $cf::PLAYER{$_[0]}->active
		995	and $cf::PLAYER{$_[0]}
		996	}
		997
		998	sub exists($) {
		999	my ($login) = @_;
		1000
		1001	$cf::PLAYER{$login}
		1002	or cf::sync_job { !aio_stat path $login }
		1003	}
		1004
		1005	sub find($) {
		1006	return $cf::PLAYER{$_[0]} || do {
		1007	my $login = $_[0];
		1008
		1009	my $guard = cf::lock_acquire "user_find:$login";
		1010
		1011	$cf::PLAYER{$_[0]} || do {
		1012	# rename old playerfiles to new ones
		1013	#TODO: remove when no longer required
		1014	aio_link +(playerdir $login) . "/$login.pl.pst", (playerdir $login) . "/playerdata.pst";
		1015	aio_link +(playerdir $login) . "/$login.pl" , (playerdir $login) . "/playerdata";
		1016	aio_unlink +(playerdir $login) . "/$login.pl.pst";
		1017	aio_unlink +(playerdir $login) . "/$login.pl";
		1018
		1019	my $pl = load_pl path $login
		1020	or return;
		1021	$cf::PLAYER{$login} = $pl
		1022	}
		1023	}
		1024	}
		1025
		1026	sub save($) {
715	my ($pl, $buf) = @_;	1027	my ($pl) = @_;
716		1028
717	my $msg = eval { from_json $buf };	1029	return if $pl->{deny_save};
718		1030
719	if (ref $msg) {	1031	my $path = path $pl;
720	if (my $cb = $extcmd{$msg->{msgtype}}) {	1032	my $guard = cf::lock_acquire "user_save:$path";
721	if (my %reply = $cb->[0]->($pl, $msg)) {	1033
722	$pl->ext_reply ($msg->{msgid}, %reply);	1034	return if $pl->{deny_save};
723	}	1035
		1036	aio_mkdir playerdir $pl, 0770;
		1037	$pl->{last_save} = $cf::RUNTIME;
		1038
		1039	$pl->save_pl ($path);
		1040	Coro::cede;
		1041	}
		1042
		1043	sub new($) {
		1044	my ($login) = @_;
		1045
		1046	my $self = create;
		1047
		1048	$self->ob->name ($login);
		1049	$self->{deny_save} = 1;
		1050
		1051	$cf::PLAYER{$login} = $self;
		1052
		1053	$self
		1054	}
		1055
		1056	=item $pl->quit_character
		1057
		1058	Nukes the player without looking back. If logged in, the connection will
		1059	be destroyed. May block for a long time.
		1060
		1061	=cut
		1062
		1063	sub quit_character {
		1064	my ($pl) = @_;
		1065
		1066	my $name = $pl->ob->name;
		1067
		1068	$pl->{deny_save} = 1;
		1069	$pl->password ("*"); # this should lock out the player until we nuked the dir
		1070
		1071	$pl->invoke (cf::EVENT_PLAYER_LOGOUT, 1) if $pl->active;
		1072	$pl->deactivate;
		1073	$pl->invoke (cf::EVENT_PLAYER_QUIT);
		1074	$pl->ns->destroy if $pl->ns;
		1075
		1076	my $path = playerdir $pl;
		1077	my $temp = "$path~$cf::RUNTIME~deleting~";
		1078	aio_rename $path, $temp;
		1079	delete $cf::PLAYER{$pl->ob->name};
		1080	$pl->destroy;
		1081
		1082	my $prefix = qr<^~\Q$name\E/>;
		1083
		1084	# nuke player maps
		1085	$cf::MAP{$_}->nuke for grep /$prefix/, keys %cf::MAP;
		1086
		1087	IO::AIO::aio_rmtree $temp;
		1088	}
		1089
		1090	=item $pl->kick
		1091
		1092	Kicks a player out of the game. This destroys the connection.
		1093
		1094	=cut
		1095
		1096	sub kick {
		1097	my ($pl, $kicker) = @_;
		1098
		1099	$pl->invoke (cf::EVENT_PLAYER_KICK, $kicker);
		1100	$pl->killer ("kicked");
		1101	$pl->ns->destroy;
		1102	}
		1103
		1104	=item cf::player::list_logins
		1105
		1106	Returns am arrayref of all valid playernames in the system, can take a
		1107	while and may block, so not sync_job-capable, ever.
		1108
		1109	=cut
		1110
		1111	sub list_logins {
		1112	my $dirs = aio_readdir $PLAYERDIR
		1113	or return [];
		1114
		1115	my @logins;
		1116
		1117	for my $login (@$dirs) {
		1118	my $fh = aio_open path $login, Fcntl::O_RDONLY, 0 or next;
		1119	aio_read $fh, 0, 512, my $buf, 0 or next;
		1120	$buf !~ /^password -------------$/m or next; # official not-valid tag
		1121
		1122	utf8::decode $login;
		1123	push @logins, $login;
		1124	}
		1125
		1126	\@logins
		1127	}
		1128
		1129	=item $player->maps
		1130
		1131	Returns an arrayref of map paths that are private for this
		1132	player. May block.
		1133
		1134	=cut
		1135
		1136	sub maps($) {
		1137	my ($pl) = @_;
		1138
		1139	$pl = ref $pl ? $pl->ob->name : $pl;
		1140
		1141	my $files = aio_readdir playerdir $pl
		1142	or return;
		1143
		1144	my @paths;
		1145
		1146	for (@$files) {
		1147	utf8::decode $_;
		1148	next if /\.(?:pl|pst)$/;
		1149	next unless /^$PATH_SEP/o;
		1150
		1151	push @paths, cf::map::normalise "~$pl/$_";
		1152	}
		1153
		1154	\@paths
		1155	}
		1156
		1157	=item $player->ext_reply ($msgid, %msg)
		1158
		1159	Sends an ext reply to the player.
		1160
		1161	=cut
		1162
		1163	sub ext_reply($$%) {
		1164	my ($self, $id, %msg) = @_;
		1165
		1166	$msg{msgid} = $id;
		1167
		1168	$self->send ("ext " . cf::to_json \%msg);
		1169	}
		1170
		1171	=item $player->ext_event ($type, %msg)
		1172
		1173	Sends an ext event to the client.
		1174
		1175	=cut
		1176
		1177	sub ext_event($$%) {
		1178	my ($self, $type, %msg) = @_;
		1179
		1180	$self->ns->ext_event ($type, %msg);
		1181	}
		1182
		1183	=head3 cf::region
		1184
		1185	=over 4
		1186
		1187	=cut
		1188
		1189	package cf::region;
		1190
		1191	=item cf::region::find_by_path $path
		1192
		1193	Tries to decuce the probable region for a map knowing only its path.
		1194
		1195	=cut
		1196
		1197	sub find_by_path($) {
		1198	my ($path) = @_;
		1199
		1200	my ($match, $specificity);
		1201
		1202	for my $region (list) {
		1203	if ($region->match && $path =~ $region->match) {
		1204	($match, $specificity) = ($region, $region->specificity)
		1205	if $region->specificity > $specificity;
		1206	}
		1207	}
		1208
		1209	$match
		1210	}
		1211
		1212	=back
		1213
		1214	=head3 cf::map
		1215
		1216	=over 4
		1217
		1218	=cut
		1219
		1220	package cf::map;
		1221
		1222	use Fcntl;
		1223	use Coro::AIO;
		1224
		1225	use overload
		1226	'""' => \&as_string,
		1227	fallback => 1;
		1228
		1229	our $MAX_RESET = 3600;
		1230	our $DEFAULT_RESET = 3000;
		1231
		1232	sub generate_random_map {
		1233	my ($self, $rmp) = @_;
		1234	# mit "rum" bekleckern, nicht
		1235	$self->_create_random_map (
		1236	$rmp->{wallstyle}, $rmp->{wall_name}, $rmp->{floorstyle}, $rmp->{monsterstyle},
		1237	$rmp->{treasurestyle}, $rmp->{layoutstyle}, $rmp->{doorstyle}, $rmp->{decorstyle},
		1238	$rmp->{origin_map}, $rmp->{final_map}, $rmp->{exitstyle}, $rmp->{this_map},
		1239	$rmp->{exit_on_final_map},
		1240	$rmp->{xsize}, $rmp->{ysize},
		1241	$rmp->{expand2x}, $rmp->{layoutoptions1}, $rmp->{layoutoptions2}, $rmp->{layoutoptions3},
		1242	$rmp->{symmetry}, $rmp->{difficulty}, $rmp->{difficulty_given}, $rmp->{difficulty_increase},
		1243	$rmp->{dungeon_level}, $rmp->{dungeon_depth}, $rmp->{decoroptions}, $rmp->{orientation},
		1244	$rmp->{origin_y}, $rmp->{origin_x}, $rmp->{random_seed}, $rmp->{total_map_hp},
		1245	$rmp->{map_layout_style}, $rmp->{treasureoptions}, $rmp->{symmetry_used},
		1246	(cf::region::find $rmp->{region}), $rmp->{custom}
		1247	)
		1248	}
		1249
		1250	=item cf::map->register ($regex, $prio)
		1251
		1252	Register a handler for the map path matching the given regex at the
		1253	givne priority (higher is better, built-in handlers have priority 0, the
		1254	default).
		1255
		1256	=cut
		1257
		1258	sub register {
		1259	my (undef, $regex, $prio) = @_;
		1260	my $pkg = caller;
		1261
		1262	no strict;
		1263	push @{"$pkg\::ISA"}, __PACKAGE__;
		1264
		1265	$EXT_MAP{$pkg} = [$prio, qr<$regex>];
		1266	}
		1267
		1268	# also paths starting with '/'
		1269	$EXT_MAP{"cf::map"} = [0, qr{^(?=/)}];
		1270
		1271	sub thawer_merge {
		1272	my ($self, $merge) = @_;
		1273
		1274	# we have to keep some variables in memory intact
		1275	local $self->{path};
		1276	local $self->{load_path};
		1277	local $self->{deny_save};
		1278	local $self->{deny_reset};
		1279
		1280	$self->SUPER::thawer_merge ($merge);
		1281	}
		1282
		1283	sub normalise {
		1284	my ($path, $base) = @_;
		1285
		1286	$path = "$path"; # make sure its a string
		1287
		1288	$path =~ s/\.map$//;
		1289
		1290	# map plan:
		1291	#
		1292	# /! non-realised random map exit (special hack!)
		1293	# {... are special paths that are not being touched
		1294	# ?xxx/... are special absolute paths
		1295	# ?random/... random maps
		1296	# /... normal maps
		1297	# ~user/... per-player map of a specific user
		1298
		1299	$path =~ s/$PATH_SEP/\//go;
		1300
		1301	# treat it as relative path if it starts with
		1302	# something that looks reasonable
		1303	if ($path =~ m{^(?:\./|\.\./|\w)}) {
		1304	$base or Carp::carp "normalise called with relative path and no base: '$path'";
		1305
		1306	$base =~ s{[^/]+/?$}{};
		1307	$path = "$base/$path";
		1308	}
		1309
		1310	for ($path) {
		1311	redo if s{//}{/};
		1312	redo if s{/\.?/}{/};
		1313	redo if s{/[^/]+/\.\./}{/};
		1314	}
		1315
		1316	$path
		1317	}
		1318
		1319	sub new_from_path {
		1320	my (undef, $path, $base) = @_;
		1321
		1322	return $path if UNIVERSAL::isa $path, "cf::map"; # already a map object
		1323
		1324	$path = normalise $path, $base;
		1325
		1326	for my $pkg (sort { $EXT_MAP{$b}[0] <=> $EXT_MAP{$a}[0] } keys %EXT_MAP) {
		1327	if ($path =~ $EXT_MAP{$pkg}[1]) {
		1328	my $self = bless cf::map::new, $pkg;
		1329	$self->{path} = $path; $self->path ($path);
		1330	$self->init; # pass $1 etc.
		1331	return $self;
		1332	}
		1333	}
		1334
		1335	Carp::carp "unable to resolve path '$path' (base '$base').";
		1336	()
		1337	}
		1338
		1339	sub init {
		1340	my ($self) = @_;
		1341
		1342	$self
		1343	}
		1344
		1345	sub as_string {
		1346	my ($self) = @_;
		1347
		1348	"$self->{path}"
		1349	}
		1350
		1351	# the displayed name, this is a one way mapping
		1352	sub visible_name {
		1353	&as_string
		1354	}
		1355
		1356	# the original (read-only) location
		1357	sub load_path {
		1358	my ($self) = @_;
		1359
		1360	"$MAPDIR/$self->{path}.map"
		1361	}
		1362
		1363	# the temporary/swap location
		1364	sub save_path {
		1365	my ($self) = @_;
		1366
		1367	(my $path = $_[0]{path}) =~ s/\//$PATH_SEP/g;
		1368	"$TMPDIR/$path.map"
		1369	}
		1370
		1371	# the unique path, undef == no special unique path
		1372	sub uniq_path {
		1373	my ($self) = @_;
		1374
		1375	(my $path = $_[0]{path}) =~ s/\//$PATH_SEP/g;
		1376	"$UNIQUEDIR/$path"
		1377	}
		1378
		1379	# and all this just because we cannot iterate over
		1380	# all maps in C++...
		1381	sub change_all_map_light {
		1382	my ($change) = @_;
		1383
		1384	$_->change_map_light ($change)
		1385	for grep $_->outdoor, values %cf::MAP;
		1386	}
		1387
		1388	sub unlink_save {
		1389	my ($self) = @_;
		1390
		1391	utf8::encode (my $save = $self->save_path);
		1392	IO::AIO::aioreq_pri 4; Coro::AIO::aio_unlink $save;
		1393	IO::AIO::aioreq_pri 4; Coro::AIO::aio_unlink "$save.pst";
		1394	}
		1395
		1396	sub load_header_from($) {
		1397	my ($self, $path) = @_;
		1398
		1399	utf8::encode $path;
		1400	#aio_open $path, O_RDONLY, 0
		1401	# or return;
		1402
		1403	$self->_load_header ($path)
		1404	or return;
		1405
		1406	$self->{load_path} = $path;
		1407
		1408	1
		1409	}
		1410
		1411	sub load_header_orig {
		1412	my ($self) = @_;
		1413
		1414	$self->load_header_from ($self->load_path)
		1415	}
		1416
		1417	sub load_header_temp {
		1418	my ($self) = @_;
		1419
		1420	$self->load_header_from ($self->save_path)
		1421	}
		1422
		1423	sub prepare_temp {
		1424	my ($self) = @_;
		1425
		1426	$self->last_access ((delete $self->{last_access})
		1427	|| $cf::RUNTIME); #d#
		1428	# safety
		1429	$self->{instantiate_time} = $cf::RUNTIME
		1430	if $self->{instantiate_time} > $cf::RUNTIME;
		1431	}
		1432
		1433	sub prepare_orig {
		1434	my ($self) = @_;
		1435
		1436	$self->{load_original} = 1;
		1437	$self->{instantiate_time} = $cf::RUNTIME;
		1438	$self->last_access ($cf::RUNTIME);
		1439	$self->instantiate;
		1440	}
		1441
		1442	sub load_header {
		1443	my ($self) = @_;
		1444
		1445	if ($self->load_header_temp) {
		1446	$self->prepare_temp;
		1447	} else {
		1448	$self->load_header_orig
		1449	or return;
		1450	$self->prepare_orig;
		1451	}
		1452
		1453	$self->default_region (cf::region::find_by_path $self->{path})
		1454	unless $self->default_region;
		1455
		1456	1
		1457	}
		1458
		1459	sub find;
		1460	sub find {
		1461	my ($path, $origin) = @_;
		1462
		1463	$path = normalise $path, $origin && $origin->path;
		1464
		1465	cf::lock_wait "map_find:$path";
		1466
		1467	$cf::MAP{$path} || do {
		1468	my $guard = cf::lock_acquire "map_find:$path";
		1469	my $map = new_from_path cf::map $path
		1470	or return;
		1471
		1472	$map->{last_save} = $cf::RUNTIME;
		1473
		1474	$map->load_header
		1475	or return;
		1476
		1477	if ($map->should_reset && 0) {#d#TODO# disabled, crashy (locking issue?)
		1478	# doing this can freeze the server in a sync job, obviously
		1479	#$cf::WAIT_FOR_TICK->wait;
		1480	$map->reset;
		1481	undef $guard;
		1482	return find $path;
		1483	}
		1484
		1485	$cf::MAP{$path} = $map
		1486	}
		1487	}
		1488
		1489	sub pre_load { }
		1490	sub post_load { }
		1491
		1492	sub load {
		1493	my ($self) = @_;
		1494
		1495	local $self->{deny_reset} = 1; # loading can take a long time
		1496
		1497	my $path = $self->{path};
		1498
		1499	{
		1500	my $guard = cf::lock_acquire "map_load:$path";
		1501
		1502	return if $self->in_memory != cf::MAP_SWAPPED;
		1503
		1504	$self->in_memory (cf::MAP_LOADING);
		1505
		1506	$self->alloc;
		1507
		1508	$self->pre_load;
		1509	Coro::cede;
		1510
		1511	$self->_load_objects ($self->{load_path}, 1)
		1512	or return;
		1513
		1514	$self->set_object_flag (cf::FLAG_OBJ_ORIGINAL, 1)
		1515	if delete $self->{load_original};
		1516
		1517	if (my $uniq = $self->uniq_path) {
		1518	utf8::encode $uniq;
		1519	if (aio_open $uniq, O_RDONLY, 0) {
		1520	$self->clear_unique_items;
		1521	$self->_load_objects ($uniq, 0);
724	}	1522	}
725	} else {
726	warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";
727	}	1523	}
728		1524
729	cf::override;	1525	Coro::cede;
		1526	# now do the right thing for maps
		1527	$self->link_multipart_objects;
		1528	$self->difficulty ($self->estimate_difficulty)
		1529	unless $self->difficulty;
		1530	Coro::cede;
		1531
		1532	unless ($self->{deny_activate}) {
		1533	$self->decay_objects;
		1534	$self->fix_auto_apply;
		1535	$self->update_buttons;
		1536	Coro::cede;
		1537	$self->set_darkness_map;
		1538	Coro::cede;
		1539	$self->activate;
		1540	}
		1541
		1542	$self->in_memory (cf::MAP_IN_MEMORY);
730	},	1543	}
731	;
732		1544
733	#############################################################################	1545	$self->post_load;
734	# load/save/clean perl data associated with a map	1546	}
735		1547
736	*cf::mapsupport::on_clean = sub {	1548	sub customise_for {
		1549	my ($self, $ob) = @_;
		1550
		1551	return find "~" . $ob->name . "/" . $self->{path}
		1552	if $self->per_player;
		1553
		1554	$self
		1555	}
		1556
		1557	# find and load all maps in the 3x3 area around a map
		1558	sub load_diag {
737	my ($map) = @_;	1559	my ($map) = @_;
738		1560
739	my $path = $map->tmpname;	1561	my @diag; # diagonal neighbours
740	defined $path or return;
741		1562
742	unlink "$path.pst";	1563	for (0 .. 3) {
743	};	1564	my $neigh = $map->tile_path ($_)
		1565	or next;
		1566	$neigh = find $neigh, $map
		1567	or next;
		1568	$neigh->load;
744		1569
745	attach_to_maps prio => -10000, package => cf::mapsupport::;	1570	push @diag, [$neigh->tile_path (($_ + 3) % 4), $neigh],
		1571	[$neigh->tile_path (($_ + 1) % 4), $neigh];
		1572	}
746		1573
747	#############################################################################	1574	for (@diag) {
748	# load/save perl data associated with player->ob objects	1575	my $neigh = find @$_
749		1576	or next;
750	sub all_objects(@) {	1577	$neigh->load;
751	@_, map all_objects ($_->inv), @_	1578	}
752	}	1579	}
753		1580
754	# TODO: compatibility cruft, remove when no longer needed	1581	sub find_sync {
755	attach_to_players	1582	my ($path, $origin) = @_;
756	on_load => sub {
757	my ($pl, $path) = @_;
758		1583
759	for my $o (all_objects $pl->ob) {	1584	cf::sync_job { find $path, $origin }
760	if (my $value = $o->get_ob_key_value ("_perl_data")) {	1585	}
761	$o->set_ob_key_value ("_perl_data");
762		1586
763	%$o = %{ Storable::thaw pack "H*", $value };	1587	sub do_load_sync {
		1588	my ($map) = @_;
		1589
		1590	cf::sync_job { $map->load };
		1591	}
		1592
		1593	our %MAP_PREFETCH;
		1594	our $MAP_PREFETCHER = undef;
		1595
		1596	sub find_async {
		1597	my ($path, $origin) = @_;
		1598
		1599	$path = normalise $path, $origin && $origin->{path};
		1600
		1601	if (my $map = $cf::MAP{$path}) {
		1602	return $map if $map->in_memory == cf::MAP_IN_MEMORY;
		1603	}
		1604
		1605	undef $MAP_PREFETCH{$path};
		1606	$MAP_PREFETCHER ||= cf::async {
		1607	while (%MAP_PREFETCH) {
		1608	for my $path (keys %MAP_PREFETCH) {
		1609	my $map = find $path
		1610	or next;
		1611	$map->load;
		1612
		1613	delete $MAP_PREFETCH{$path};
764	}	1614	}
765	}	1615	}
		1616	undef $MAP_PREFETCHER;
		1617	};
		1618	$MAP_PREFETCHER->prio (6);
		1619
		1620	()
		1621	}
		1622
		1623	sub save {
		1624	my ($self) = @_;
		1625
		1626	my $lock = cf::lock_acquire "map_data:" . $self->path;
		1627
		1628	$self->{last_save} = $cf::RUNTIME;
		1629
		1630	return unless $self->dirty;
		1631
		1632	my $save = $self->save_path; utf8::encode $save;
		1633	my $uniq = $self->uniq_path; utf8::encode $uniq;
		1634
		1635	$self->{load_path} = $save;
		1636
		1637	return if $self->{deny_save};
		1638
		1639	local $self->{last_access} = $self->last_access;#d#
		1640
		1641	cf::async {
		1642	$_->contr->save for $self->players;
		1643	};
		1644
		1645	if ($uniq) {
		1646	$self->_save_objects ($save, cf::IO_HEADER | cf::IO_OBJECTS);
		1647	$self->_save_objects ($uniq, cf::IO_UNIQUES);
		1648	} else {
		1649	$self->_save_objects ($save, cf::IO_HEADER | cf::IO_OBJECTS | cf::IO_UNIQUES);
766	},	1650	}
767	;	1651	}
768		1652
769	#############################################################################	1653	sub swap_out {
		1654	my ($self) = @_;
770		1655
771	=head2 CORE EXTENSIONS	1656	# save first because save cedes
		1657	$self->save;
772		1658
773	Functions and methods that extend core crossfire objects.	1659	my $lock = cf::lock_acquire "map_data:" . $self->path;
		1660
		1661	return if $self->players;
		1662	return if $self->in_memory != cf::MAP_IN_MEMORY;
		1663	return if $self->{deny_save};
		1664
		1665	$self->clear;
		1666	$self->in_memory (cf::MAP_SWAPPED);
		1667	}
		1668
		1669	sub reset_at {
		1670	my ($self) = @_;
		1671
		1672	# TODO: safety, remove and allow resettable per-player maps
		1673	return 1e99 if $self->isa ("ext::map_per_player");#d#
		1674	return 1e99 if $self->{deny_reset};
		1675
		1676	my $time = $self->fixed_resettime ? $self->{instantiate_time} : $self->last_access;
		1677	my $to = List::Util::min $MAX_RESET, $self->reset_timeout || $DEFAULT_RESET;
		1678
		1679	$time + $to
		1680	}
		1681
		1682	sub should_reset {
		1683	my ($self) = @_;
		1684
		1685	$self->reset_at <= $cf::RUNTIME
		1686	}
		1687
		1688	sub reset {
		1689	my ($self) = @_;
		1690
		1691	my $lock = cf::lock_acquire "map_data:$self->{path}";
		1692
		1693	return if $self->players;
		1694	return if $self->isa ("ext::map_per_player");#d#
		1695
		1696	warn "resetting map ", $self->path;#d#
		1697
		1698	$self->in_memory (cf::MAP_SWAPPED);
		1699
		1700	# need to save uniques path
		1701	unless ($self->{deny_save}) {
		1702	my $uniq = $self->uniq_path; utf8::encode $uniq;
		1703
		1704	$self->_save_objects ($uniq, cf::IO_UNIQUES)
		1705	if $uniq;
		1706	}
		1707
		1708	delete $cf::MAP{$self->path};
		1709
		1710	$self->clear;
		1711
		1712	$_->clear_links_to ($self) for values %cf::MAP;
		1713
		1714	$self->unlink_save;
		1715	$self->destroy;
		1716	}
		1717
		1718	my $nuke_counter = "aaaa";
		1719
		1720	sub nuke {
		1721	my ($self) = @_;
		1722
		1723	delete $cf::MAP{$self->path};
		1724
		1725	$self->unlink_save;
		1726
		1727	bless $self, "cf::map";
		1728	delete $self->{deny_reset};
		1729	$self->{deny_save} = 1;
		1730	$self->reset_timeout (1);
		1731	$self->path ($self->{path} = "{nuke}/" . ($nuke_counter++));
		1732
		1733	$cf::MAP{$self->path} = $self;
		1734
		1735	$self->reset; # polite request, might not happen
		1736	}
		1737
		1738	=item cf::map::unique_maps
		1739
		1740	Returns an arrayref of paths of all shared maps that have
		1741	instantiated unique items. May block.
		1742
		1743	=cut
		1744
		1745	sub unique_maps() {
		1746	my $files = aio_readdir $UNIQUEDIR
		1747	or return;
		1748
		1749	my @paths;
		1750
		1751	for (@$files) {
		1752	utf8::decode $_;
		1753	next if /\.pst$/;
		1754	next unless /^$PATH_SEP/o;
		1755
		1756	push @paths, cf::map::normalise $_;
		1757	}
		1758
		1759	\@paths
		1760	}
		1761
		1762	package cf;
		1763
		1764	=back
		1765
		1766	=head3 cf::object
		1767
		1768	=cut
		1769
		1770	package cf::object;
774		1771
775	=over 4	1772	=over 4
776		1773
777	=item cf::player::exists $login	1774	=item $ob->inv_recursive
778		1775
779	Returns true when the given account exists.	1776	Returns the inventory of the object _and_ their inventories, recursively.
780		1777
781	=cut	1778	=cut
782		1779
783	sub cf::player::exists($) {	1780	sub inv_recursive_;
784	cf::player::find $_[0]	1781	sub inv_recursive_ {
785	or -f sprintf "%s/%s/%s/%s.pl", cf::localdir, cf::playerdir, ($_[0]) x 2;	1782	map { $_, inv_recursive_ $_->inv } @_
786	}	1783	}
		1784
		1785	sub inv_recursive {
		1786	inv_recursive_ inv $_[0]
		1787	}
		1788
		1789	package cf;
		1790
		1791	=back
		1792
		1793	=head3 cf::object::player
		1794
		1795	=over 4
787		1796
788	=item $player_object->reply ($npc, $msg[, $flags])	1797	=item $player_object->reply ($npc, $msg[, $flags])
789		1798
790	Sends a message to the player, as if the npc C<$npc> replied. C<$npc>	1799	Sends a message to the player, as if the npc C<$npc> replied. C<$npc>
791	can be C<undef>. Does the right thing when the player is currently in a	1800	can be C<undef>. Does the right thing when the player is currently in a
…		…
793		1802
794	=cut	1803	=cut
795		1804
796	# rough implementation of a future "reply" method that works	1805	# rough implementation of a future "reply" method that works
797	# with dialog boxes.	1806	# with dialog boxes.
		1807	#TODO: the first argument must go, split into a $npc->reply_to ( method
798	sub cf::object::player::reply($$$;$) {	1808	sub cf::object::player::reply($$$;$) {
799	my ($self, $npc, $msg, $flags) = @_;	1809	my ($self, $npc, $msg, $flags) = @_;
800		1810
801	$flags = cf::NDI_BROWN | cf::NDI_UNIQUE unless @_ >= 4;	1811	$flags = cf::NDI_BROWN | cf::NDI_UNIQUE unless @_ >= 4;
802		1812
…		…
806	$msg = $npc->name . " says: $msg" if $npc;	1816	$msg = $npc->name . " says: $msg" if $npc;
807	$self->message ($msg, $flags);	1817	$self->message ($msg, $flags);
808	}	1818	}
809	}	1819	}
810		1820
811	=item $player->ext_reply ($msgid, $msgtype, %msg)
812
813	Sends an ext reply to the player.
814
815	=cut
816
817	sub cf::player::ext_reply($$$%) {
818	my ($self, $id, %msg) = @_;
819
820	$msg{msgid} = $id;
821
822	$self->send ("ext " . to_json \%msg);
823	}
824
825	=item $player_object->may ("access")	1821	=item $player_object->may ("access")
826		1822
827	Returns wether the given player is authorized to access resource "access"	1823	Returns wether the given player is authorized to access resource "access"
828	(e.g. "command_wizcast").	1824	(e.g. "command_wizcast").
829		1825
…		…
836	(ref $cf::CFG{"may_$access"}	1832	(ref $cf::CFG{"may_$access"}
837	? scalar grep $self->name eq $_, @{$cf::CFG{"may_$access"}}	1833	? scalar grep $self->name eq $_, @{$cf::CFG{"may_$access"}}
838	: $cf::CFG{"may_$access"})	1834	: $cf::CFG{"may_$access"})
839	}	1835	}
840		1836
841	=cut	1837	=item $player_object->enter_link
842		1838
843	#############################################################################	1839	Freezes the player and moves him/her to a special map (C<{link}>).
		1840
		1841	The player should be reasonably safe there for short amounts of time. You
		1842	I<MUST> call C<leave_link> as soon as possible, though.
		1843
		1844	Will never block.
		1845
		1846	=item $player_object->leave_link ($map, $x, $y)
		1847
		1848	Moves the player out of the special C<{link}> map onto the specified
		1849	map. If the map is not valid (or omitted), the player will be moved back
		1850	to the location he/she was before the call to C<enter_link>, or, if that
		1851	fails, to the emergency map position.
		1852
		1853	Might block.
		1854
		1855	=cut
		1856
		1857	sub link_map {
		1858	unless ($LINK_MAP) {
		1859	$LINK_MAP = cf::map::find "{link}"
		1860	or cf::cleanup "FATAL: unable to provide {link} map, exiting.";
		1861	$LINK_MAP->load;
		1862	}
		1863
		1864	$LINK_MAP
		1865	}
		1866
		1867	sub cf::object::player::enter_link {
		1868	my ($self) = @_;
		1869
		1870	$self->deactivate_recursive;
		1871
		1872	return if UNIVERSAL::isa $self->map, "ext::map_link";
		1873
		1874	$self->{_link_pos} ||= [$self->map->{path}, $self->x, $self->y]
		1875	if $self->map;
		1876
		1877	$self->enter_map ($LINK_MAP || link_map, 10, 10);
		1878	}
		1879
		1880	sub cf::object::player::leave_link {
		1881	my ($self, $map, $x, $y) = @_;
		1882
		1883	my $link_pos = delete $self->{_link_pos};
		1884
		1885	unless ($map) {
		1886	# restore original map position
		1887	($map, $x, $y) = @{ $link_pos || [] };
		1888	$map = cf::map::find $map;
		1889
		1890	unless ($map) {
		1891	($map, $x, $y) = @$EMERGENCY_POSITION;
		1892	$map = cf::map::find $map
		1893	or die "FATAL: cannot load emergency map\n";
		1894	}
		1895	}
		1896
		1897	($x, $y) = (-1, -1)
		1898	unless (defined $x) && (defined $y);
		1899
		1900	# use -1 or undef as default coordinates, not 0, 0
		1901	($x, $y) = ($map->enter_x, $map->enter_y)
		1902	if $x <=0 && $y <= 0;
		1903
		1904	$map->load;
		1905	$map->load_diag;
		1906
		1907	return unless $self->contr->active;
		1908	$self->activate_recursive;
		1909
		1910	local $self->{_prev_pos} = $link_pos; # ugly hack for rent.ext
		1911	$self->enter_map ($map, $x, $y);
		1912	}
		1913
		1914	cf::player->attach (
		1915	on_logout => sub {
		1916	my ($pl) = @_;
		1917
		1918	# abort map switching before logout
		1919	if ($pl->ob->{_link_pos}) {
		1920	cf::sync_job {
		1921	$pl->ob->leave_link
		1922	};
		1923	}
		1924	},
		1925	on_login => sub {
		1926	my ($pl) = @_;
		1927
		1928	# try to abort aborted map switching on player login :)
		1929	# should happen only on crashes
		1930	if ($pl->ob->{_link_pos}) {
		1931	$pl->ob->enter_link;
		1932	(async {
		1933	$pl->ob->reply (undef,
		1934	"There was an internal problem at your last logout, "
		1935	. "the server will try to bring you to your intended destination in a second.",
		1936	cf::NDI_RED);
		1937	# we need this sleep as the login has a concurrent enter_exit running
		1938	# and this sleep increases chances of the player not ending up in scorn
		1939	Coro::Timer::sleep 1;
		1940	$pl->ob->leave_link;
		1941	})->prio (2);
		1942	}
		1943	},
		1944	);
		1945
		1946	=item $player_object->goto ($path, $x, $y)
		1947
		1948	=cut
		1949
		1950	sub cf::object::player::goto {
		1951	my ($self, $path, $x, $y) = @_;
		1952
		1953	$self->enter_link;
		1954
		1955	(async {
		1956	my $map = eval {
		1957	my $map = cf::map::find $path;
		1958	$map = $map->customise_for ($self) if $map;
		1959	$map
		1960	} or
		1961	$self->message ("The exit to '$path' is closed", cf::NDI_UNIQUE | cf::NDI_RED);
		1962
		1963	$self->leave_link ($map, $x, $y);
		1964	})->prio (1);
		1965	}
		1966
		1967	=item $player_object->enter_exit ($exit_object)
		1968
		1969	=cut
		1970
		1971	sub parse_random_map_params {
		1972	my ($spec) = @_;
		1973
		1974	my $rmp = { # defaults
		1975	xsize => (cf::rndm 15, 40),
		1976	ysize => (cf::rndm 15, 40),
		1977	symmetry => (cf::rndm 1, cf::SYMMETRY_XY),
		1978	#layout => string,
		1979	};
		1980
		1981	for (split /\n/, $spec) {
		1982	my ($k, $v) = split /\s+/, $_, 2;
		1983
		1984	$rmp->{lc $k} = $v if (length $k) && (length $v);
		1985	}
		1986
		1987	$rmp
		1988	}
		1989
		1990	sub prepare_random_map {
		1991	my ($exit) = @_;
		1992
		1993	my $guard = cf::lock_acquire "exit_prepare:$exit";
		1994
		1995	# all this does is basically replace the /! path by
		1996	# a new random map path (?random/...) with a seed
		1997	# that depends on the exit object
		1998
		1999	my $rmp = parse_random_map_params $exit->msg;
		2000
		2001	if ($exit->map) {
		2002	$rmp->{region} = $exit->region->name;
		2003	$rmp->{origin_map} = $exit->map->path;
		2004	$rmp->{origin_x} = $exit->x;
		2005	$rmp->{origin_y} = $exit->y;
		2006	}
		2007
		2008	$rmp->{random_seed} ||= $exit->random_seed;
		2009
		2010	my $data = cf::to_json $rmp;
		2011	my $md5 = Digest::MD5::md5_hex $data;
		2012	my $meta = "$RANDOMDIR/$md5.meta";
		2013
		2014	if (my $fh = aio_open "$meta~", O_WRONLY | O_CREAT, 0666) {
		2015	aio_write $fh, 0, (length $data), $data, 0;
		2016	undef $fh;
		2017	aio_rename "$meta~", $meta;
		2018
		2019	$exit->slaying ("?random/$md5");
		2020	$exit->msg (undef);
		2021	}
		2022	}
		2023
		2024	sub cf::object::player::enter_exit {
		2025	my ($self, $exit) = @_;
		2026
		2027	return unless $self->type == cf::PLAYER;
		2028
		2029	if ($exit->slaying eq "/!") {
		2030	#TODO: this should de-fi-ni-te-ly not be a sync-job
		2031	# the problem is that $exit might not survive long enough
		2032	# so it needs to be done right now, right here
		2033	cf::sync_job { prepare_random_map $exit };
		2034	}
		2035
		2036	my $slaying = cf::map::normalise $exit->slaying, $exit->map && $exit->map->path;
		2037	my $hp = $exit->stats->hp;
		2038	my $sp = $exit->stats->sp;
		2039
		2040	$self->enter_link;
		2041
		2042	(async {
		2043	$self->deactivate_recursive; # just to be sure
		2044	unless (eval {
		2045	$self->goto ($slaying, $hp, $sp);
		2046
		2047	1;
		2048	}) {
		2049	$self->message ("Something went wrong deep within the crossfire server. "
		2050	. "I'll try to bring you back to the map you were before. "
		2051	. "Please report this to the dungeon master!",
		2052	cf::NDI_UNIQUE | cf::NDI_RED);
		2053
		2054	warn "ERROR in enter_exit: $@";
		2055	$self->leave_link;
		2056	}
		2057	})->prio (1);
		2058	}
		2059
		2060	=head3 cf::client
		2061
		2062	=over 4
		2063
		2064	=item $client->send_drawinfo ($text, $flags)
		2065
		2066	Sends a drawinfo packet to the client. Circumvents output buffering so
		2067	should not be used under normal circumstances.
		2068
		2069	=cut
		2070
		2071	sub cf::client::send_drawinfo {
		2072	my ($self, $text, $flags) = @_;
		2073
		2074	utf8::encode $text;
		2075	$self->send_packet (sprintf "drawinfo %d %s", $flags || cf::NDI_BLACK, $text);
		2076	}
		2077
		2078	=item $client->ext_event ($type, %msg)
		2079
		2080	Sends an exti event to the client.
		2081
		2082	=cut
		2083
		2084	sub cf::client::ext_event($$%) {
		2085	my ($self, $type, %msg) = @_;
		2086
		2087	$msg{msgtype} = "event_$type";
		2088	$self->send_packet ("ext " . cf::to_json \%msg);
		2089	}
		2090
		2091	=item $success = $client->query ($flags, "text", \&cb)
		2092
		2093	Queues a query to the client, calling the given callback with
		2094	the reply text on a reply. flags can be C<cf::CS_QUERY_YESNO>,
		2095	C<cf::CS_QUERY_SINGLECHAR> or C<cf::CS_QUERY_HIDEINPUT> or C<0>.
		2096
		2097	Queries can fail, so check the return code. Or don't, as queries will become
		2098	reliable at some point in the future.
		2099
		2100	=cut
		2101
		2102	sub cf::client::query {
		2103	my ($self, $flags, $text, $cb) = @_;
		2104
		2105	return unless $self->state == ST_PLAYING
		2106	|| $self->state == ST_SETUP
		2107	|| $self->state == ST_CUSTOM;
		2108
		2109	$self->state (ST_CUSTOM);
		2110
		2111	utf8::encode $text;
		2112	push @{ $self->{query_queue} }, [(sprintf "query %d %s", $flags, $text), $cb];
		2113
		2114	$self->send_packet ($self->{query_queue}[0][0])
		2115	if @{ $self->{query_queue} } == 1;
		2116	}
		2117
		2118	cf::client->attach (
		2119	on_reply => sub {
		2120	my ($ns, $msg) = @_;
		2121
		2122	# this weird shuffling is so that direct followup queries
		2123	# get handled first
		2124	my $queue = delete $ns->{query_queue}
		2125	or return; # be conservative, not sure how that can happen, but we saw a crash here
		2126
		2127	(shift @$queue)->[1]->($msg);
		2128	return unless $ns->valid; # temporary(?) workaround for callback destroying socket
		2129
		2130	push @{ $ns->{query_queue} }, @$queue;
		2131
		2132	if (@{ $ns->{query_queue} } == @$queue) {
		2133	if (@$queue) {
		2134	$ns->send_packet ($ns->{query_queue}[0][0]);
		2135	} else {
		2136	$ns->state (ST_PLAYING) if $ns->state == ST_CUSTOM;
		2137	}
		2138	}
		2139	},
		2140	);
		2141
		2142	=item $client->async (\&cb)
		2143
		2144	Create a new coroutine, running the specified callback. The coroutine will
		2145	be automatically cancelled when the client gets destroyed (e.g. on logout,
		2146	or loss of connection).
		2147
		2148	=cut
		2149
		2150	sub cf::client::async {
		2151	my ($self, $cb) = @_;
		2152
		2153	my $coro = &Coro::async ($cb);
		2154
		2155	$coro->on_destroy (sub {
		2156	delete $self->{_coro}{$coro+0};
		2157	});
		2158
		2159	$self->{_coro}{$coro+0} = $coro;
		2160
		2161	$coro
		2162	}
		2163
		2164	cf::client->attach (
		2165	on_destroy => sub {
		2166	my ($ns) = @_;
		2167
		2168	$_->cancel for values %{ (delete $ns->{_coro}) || {} };
		2169	},
		2170	);
		2171
		2172	=back
		2173
844		2174
845	=head2 SAFE SCRIPTING	2175	=head2 SAFE SCRIPTING
846		2176
847	Functions that provide a safe environment to compile and execute	2177	Functions that provide a safe environment to compile and execute
848	snippets of perl code without them endangering the safety of the server	2178	snippets of perl code without them endangering the safety of the server
…		…
861		2191
862	# here we export the classes and methods available to script code	2192	# here we export the classes and methods available to script code
863		2193
864	=pod	2194	=pod
865		2195
866	The following fucntions and emthods are available within a safe environment:	2196	The following functions and methods are available within a safe environment:
867		2197
868	cf::object contr pay_amount pay_player	2198	cf::object contr pay_amount pay_player map
869	cf::object::player player	2199	cf::object::player player
870	cf::player peaceful	2200	cf::player peaceful
		2201	cf::map trigger
871		2202
872	=cut	2203	=cut
873		2204
874	for (	2205	for (
875	["cf::object" => qw(contr pay_amount pay_player)],	2206	["cf::object" => qw(contr pay_amount pay_player map)],
876	["cf::object::player" => qw(player)],	2207	["cf::object::player" => qw(player)],
877	["cf::player" => qw(peaceful)],	2208	["cf::player" => qw(peaceful)],
		2209	["cf::map" => qw(trigger)],
878	) {	2210	) {
879	no strict 'refs';	2211	no strict 'refs';
880	my ($pkg, @funs) = @$_;	2212	my ($pkg, @funs) = @$_;
881	*{"safe::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})	2213	*{"safe::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})
882	for @funs;	2214	for @funs;
…		…
954	#############################################################################	2286	#############################################################################
955		2287
956	=head2 EXTENSION DATABASE SUPPORT	2288	=head2 EXTENSION DATABASE SUPPORT
957		2289
958	Crossfire maintains a very simple database for extension use. It can	2290	Crossfire maintains a very simple database for extension use. It can
959	currently store anything that can be serialised using Storable, which	2291	currently store binary data only (use Compress::LZF::sfreeze_cr/sthaw to
960	excludes objects.	2292	convert to/from binary).
961		2293
962	The parameter C<$family> should best start with the name of the extension	2294	The parameter C<$family> should best start with the name of the extension
963	using it, it should be unique.	2295	using it, it should be unique.
964		2296
965	=over 4	2297	=over 4
966		2298
967	=item $hashref = cf::db_get $family
968
969	Return a hashref for use by the extension C<$family>, which can be
970	modified. After modifications, you have to call C<cf::db_dirty> or
971	C<cf::db_sync>.
972
973	=item $value = cf::db_get $family => $key	2299	=item $value = cf::db_get $family => $key
974		2300
975	Returns a single value from the database	2301	Returns a single value from the database.
976
977	=item cf::db_put $family => $hashref
978
979	Stores the given family hashref into the database. Updates are delayed, if
980	you want the data to be synced to disk immediately, use C<cf::db_sync>.
981		2302
982	=item cf::db_put $family => $key => $value	2303	=item cf::db_put $family => $key => $value
983		2304
984	Stores the given C<$value> in the family hash. Updates are delayed, if you	2305	Stores the given C<$value> in the family.
985	want the data to be synced to disk immediately, use C<cf::db_sync>.
986
987	=item cf::db_dirty
988
989	Marks the database as dirty, to be updated at a later time.
990
991	=item cf::db_sync
992
993	Immediately write the database to disk I<if it is dirty>.
994		2306
995	=cut	2307	=cut
996		2308
997	our $DB;	2309	our $DB;
998		2310
999	{	2311	sub db_init {
1000	my $path = cf::localdir . "/database.pst";	2312	unless ($DB) {
		2313	$DB = BDB::db_create $DB_ENV;
1001		2314
1002	sub db_load() {	2315	cf::sync_job {
1003	warn "loading database $path\n";#d# remove later	2316	eval {
1004	$DB = stat $path ? Storable::retrieve $path : { };	2317	$DB->set_flags (BDB::CHKSUM);
1005	}
1006		2318
1007	my $pid;	2319	BDB::db_open $DB, undef, "db", undef, BDB::BTREE,
1008		2320	BDB::CREATE | BDB::AUTO_COMMIT, 0666;
1009	sub db_save() {	2321	cf::cleanup "db_open(db): $!" if $!;
1010	warn "saving database $path\n";#d# remove later	2322	};
1011	waitpid $pid, 0 if $pid;	2323	cf::cleanup "db_open(db): $@" if $@;
1012	if (0 == ($pid = fork)) {
1013	$DB->{_meta}{version} = 1;
1014	Storable::nstore $DB, "$path~";
1015	rename "$path~", $path;
1016	cf::_exit 0 if defined $pid;
1017	}	2324	};
1018	}
1019
1020	my $dirty;
1021
1022	sub db_sync() {
1023	db_save if $dirty;
1024	undef $dirty;
1025	}
1026
1027	my $idle = Event->idle (min => $TICK * 2.8, max => 10, repeat => 0, cb => sub {
1028	db_sync;
1029	});	2325	}
		2326	}
1030		2327
1031	sub db_dirty() {
1032	$dirty = 1;
1033	$idle->start;
1034	}
1035
1036	sub db_get($;$) {	2328	sub db_get($$) {
1037	@_ >= 2	2329	my $key = "$_[0]/$_[1]";
1038	? $DB->{$_[0]}{$_[1]}
1039	: ($DB->{$_[0]} ||= { })
1040	}
1041		2330
		2331	cf::sync_job {
		2332	BDB::db_get $DB, undef, $key, my $data;
		2333
		2334	$! ? ()
		2335	: $data
		2336	}
		2337	}
		2338
1042	sub db_put($$;$) {	2339	sub db_put($$$) {
1043	if (@_ >= 3) {	2340	BDB::dbreq_pri 4;
1044	$DB->{$_[0]}{$_[1]} = $_[2];	2341	BDB::db_put $DB, undef, "$_[0]/$_[1]", $_[2], 0, sub { };
1045	} else {	2342	}
1046	$DB->{$_[0]} = $_[1];
1047	}
1048	db_dirty;
1049	}
1050		2343
1051	attach_global	2344	=item cf::cache $id => [$paths...], $processversion => $process
1052	prio => 10000,	2345
1053	on_cleanup => sub {	2346	Generic caching function that returns the value of the resource $id,
1054	db_sync;	2347	caching and regenerating as required.
		2348
		2349	This function can block.
		2350
		2351	=cut
		2352
		2353	sub cache {
		2354	my ($id, $src, $processversion, $process) = @_;
		2355
		2356	my $meta =
		2357	join "\x00",
		2358	$processversion,
		2359	map {
		2360	aio_stat $_
		2361	and Carp::croak "$_: $!";
		2362
		2363	($_, (stat _)[7,9])
		2364	} @$src;
		2365
		2366	my $dbmeta = db_get cache => "$id/meta";
		2367	if ($dbmeta ne $meta) {
		2368	# changed, we may need to process
		2369
		2370	my @data;
		2371	my $md5;
		2372
		2373	for (0 .. $#$src) {
		2374	0 <= aio_load $src->[$_], $data[$_]
		2375	or Carp::croak "$src->[$_]: $!";
1055	},	2376	}
		2377
		2378	# if processing is expensive, check
		2379	# checksum first
		2380	if (1) {
		2381	$md5 =
		2382	join "\x00",
		2383	$processversion,
		2384	map {
		2385	Coro::cede;
		2386	($src->[$_], Digest::MD5::md5_hex $data[$_])
		2387	} 0.. $#$src;
		2388
		2389
		2390	my $dbmd5 = db_get cache => "$id/md5";
		2391	if ($dbmd5 eq $md5) {
		2392	db_put cache => "$id/meta", $meta;
		2393
		2394	return db_get cache => "$id/data";
		2395	}
		2396	}
		2397
		2398	my $t1 = Time::HiRes::time;
		2399	my $data = $process->(\@data);
		2400	my $t2 = Time::HiRes::time;
		2401
		2402	warn "cache: '$id' processed in ", $t2 - $t1, "s\n";
		2403
		2404	db_put cache => "$id/data", $data;
		2405	db_put cache => "$id/md5" , $md5;
		2406	db_put cache => "$id/meta", $meta;
		2407
		2408	return $data;
1056	;	2409	}
		2410
		2411	db_get cache => "$id/data"
1057	}	2412	}
		2413
		2414	=item fork_call { }, $args
		2415
		2416	Executes the given code block with the given arguments in a seperate
		2417	process, returning the results. Everything must be serialisable with
		2418	Coro::Storable. May, of course, block. Note that the executed sub may
		2419	never block itself or use any form of Event handling.
		2420
		2421	=cut
		2422
		2423	sub fork_call(&@) {
		2424	my ($cb, @args) = @_;
		2425
		2426	# socketpair my $fh1, my $fh2, Socket::AF_UNIX, Socket::SOCK_STREAM, Socket::PF_UNSPEC
		2427	# or die "socketpair: $!";
		2428	pipe my $fh1, my $fh2
		2429	or die "pipe: $!";
		2430
		2431	if (my $pid = fork) {
		2432	close $fh2;
		2433
		2434	my $res = (Coro::Handle::unblock $fh1)->readline (undef);
		2435	$res = Coro::Storable::thaw $res;
		2436
		2437	waitpid $pid, 0; # should not block anymore, we expect the child to simply behave
		2438
		2439	die $$res unless "ARRAY" eq ref $res;
		2440
		2441	return wantarray ? @$res : $res->[-1];
		2442	} else {
		2443	reset_signals;
		2444	local $SIG{__WARN__};
		2445	local $SIG{__DIE__};
		2446	eval {
		2447	close $fh1;
		2448
		2449	my @res = eval { $cb->(@args) };
		2450	syswrite $fh2, Coro::Storable::freeze +($@ ? \"$@" : \@res);
		2451	};
		2452
		2453	warn $@ if $@;
		2454	_exit 0;
		2455	}
		2456	}
		2457
		2458
1058		2459
1059	#############################################################################	2460	#############################################################################
1060	# the server's main()	2461	# the server's init and main functions
		2462
		2463	sub load_facedata($) {
		2464	my ($path) = @_;
		2465
		2466	warn "loading facedata from $path\n";
		2467
		2468	my $facedata;
		2469	0 < aio_load $path, $facedata
		2470	or die "$path: $!";
		2471
		2472	$facedata = Coro::Storable::thaw $facedata;
		2473
		2474	$facedata->{version} == 2
		2475	or cf::cleanup "$path: version mismatch, cannot proceed.";
		2476
		2477	{
		2478	my $faces = $facedata->{faceinfo};
		2479
		2480	while (my ($face, $info) = each %$faces) {
		2481	my $idx = (cf::face::find $face) || cf::face::alloc $face;
		2482	cf::face::set $idx, $info->{visibility}, $info->{magicmap};
		2483	cf::face::set_data $idx, 0, $info->{data32}, $info->{chksum32};
		2484	cf::face::set_data $idx, 1, $info->{data64}, $info->{chksum64};
		2485	Coro::cede;
		2486	}
		2487
		2488	while (my ($face, $info) = each %$faces) {
		2489	next unless $info->{smooth};
		2490	my $idx = cf::face::find $face
		2491	or next;
		2492	if (my $smooth = cf::face::find $info->{smooth}) {
		2493	cf::face::set_smooth $idx, $smooth, $info->{smoothlevel};
		2494	} else {
		2495	warn "smooth face '$info->{smooth}' not found for face '$face'";
		2496	}
		2497	Coro::cede;
		2498	}
		2499	}
		2500
		2501	{
		2502	my $anims = $facedata->{animinfo};
		2503
		2504	while (my ($anim, $info) = each %$anims) {
		2505	cf::anim::set $anim, $info->{frames}, $info->{facings};
		2506	Coro::cede;
		2507	}
		2508
		2509	cf::anim::invalidate_all; # d'oh
		2510	}
		2511
		2512	1
		2513	}
		2514
		2515	sub reload_regions {
		2516	load_resource_file "$MAPDIR/regions"
		2517	or die "unable to load regions file\n";
		2518	}
		2519
		2520	sub reload_facedata {
		2521	load_facedata "$DATADIR/facedata"
		2522	or die "unable to load facedata\n";
		2523	}
		2524
		2525	sub reload_archetypes {
		2526	load_resource_file "$DATADIR/archetypes"
		2527	or die "unable to load archetypes\n";
		2528	}
		2529
		2530	sub reload_treasures {
		2531	load_resource_file "$DATADIR/treasures"
		2532	or die "unable to load treasurelists\n";
		2533	}
		2534
		2535	sub reload_resources {
		2536	warn "reloading resource files...\n";
		2537
		2538	reload_regions;
		2539	reload_facedata;
		2540	reload_archetypes;
		2541	reload_treasures;
		2542
		2543	warn "finished reloading resource files\n";
		2544	}
		2545
		2546	sub init {
		2547	reload_resources;
		2548	}
1061		2549
1062	sub cfg_load {	2550	sub cfg_load {
1063	open my $fh, "<:utf8", cf::confdir . "/config"	2551	open my $fh, "<:utf8", "$CONFDIR/config"
1064	or return;	2552	or return;
1065		2553
1066	local $/;	2554	local $/;
1067	*CFG = YAML::Syck::Load <$fh>;	2555	*CFG = YAML::Syck::Load <$fh>;
		2556
		2557	$EMERGENCY_POSITION = $CFG{emergency_position} || ["/world/world_105_115", 5, 37];
		2558
		2559	$cf::map::MAX_RESET = $CFG{map_max_reset} if exists $CFG{map_max_reset};
		2560	$cf::map::DEFAULT_RESET = $CFG{map_default_reset} if exists $CFG{map_default_reset};
		2561
		2562	if (exists $CFG{mlockall}) {
		2563	eval {
		2564	$CFG{mlockall} ? eval "mlockall()" : eval "munlockall()"
		2565	and die "WARNING: m(un)lockall failed: $!\n";
		2566	};
		2567	warn $@ if $@;
		2568	}
1068	}	2569	}
1069		2570
1070	sub main {	2571	sub main {
		2572	# we must not ever block the main coroutine
		2573	local $Coro::idle = sub {
		2574	Carp::cluck "FATAL: Coro::idle was called, major BUG, use cf::sync_job!\n";#d#
		2575	(async {
		2576	Event::one_event;
		2577	})->prio (Coro::PRIO_MAX);
		2578	};
		2579
1071	cfg_load;	2580	cfg_load;
1072	db_load;	2581	db_init;
1073	load_extensions;	2582	load_extensions;
		2583
		2584	$TICK_WATCHER->start;
1074	Event::loop;	2585	Event::loop;
1075	}	2586	}
1076		2587
1077	#############################################################################	2588	#############################################################################
1078	# initialisation	2589	# initialisation and cleanup
1079		2590
1080	sub _perl_reload(&) {	2591	# install some emergency cleanup handlers
		2592	BEGIN {
		2593	for my $signal (qw(INT HUP TERM)) {
		2594	Event->signal (
		2595	reentrant => 0,
		2596	data => WF_AUTOCANCEL,
		2597	signal => $signal,
		2598	prio => 0,
		2599	cb => sub {
		2600	cf::cleanup "SIG$signal";
		2601	},
		2602	);
		2603	}
		2604	}
		2605
		2606	sub emergency_save() {
		2607	my $freeze_guard = cf::freeze_mainloop;
		2608
		2609	warn "enter emergency perl save\n";
		2610
		2611	cf::sync_job {
		2612	# use a peculiar iteration method to avoid tripping on perl
		2613	# refcount bugs in for. also avoids problems with players
		2614	# and maps saved/destroyed asynchronously.
		2615	warn "begin emergency player save\n";
		2616	for my $login (keys %cf::PLAYER) {
		2617	my $pl = $cf::PLAYER{$login} or next;
		2618	$pl->valid or next;
		2619	$pl->save;
		2620	}
		2621	warn "end emergency player save\n";
		2622
		2623	warn "begin emergency map save\n";
		2624	for my $path (keys %cf::MAP) {
		2625	my $map = $cf::MAP{$path} or next;
		2626	$map->valid or next;
		2627	$map->save;
		2628	}
		2629	warn "end emergency map save\n";
		2630
		2631	warn "begin emergency database checkpoint\n";
		2632	BDB::db_env_txn_checkpoint $DB_ENV;
		2633	warn "end emergency database checkpoint\n";
		2634	};
		2635
		2636	warn "leave emergency perl save\n";
		2637	}
		2638
		2639	sub post_cleanup {
1081	my ($msg) = @_;	2640	my ($make_core) = @_;
1082		2641
1083	$msg->("reloading...");	2642	warn Carp::longmess "post_cleanup backtrace"
		2643	if $make_core;
		2644	}
1084		2645
1085	eval {	2646	sub do_reload_perl() {
1086	# cancel all watchers	2647	# can/must only be called in main
		2648	if ($Coro::current != $Coro::main) {
		2649	warn "can only reload from main coroutine";
		2650	return;
		2651	}
		2652
		2653	warn "reloading...";
		2654
		2655	warn "entering sync_job";
		2656
		2657	cf::sync_job {
		2658	cf::write_runtime; # external watchdog should not bark
		2659	cf::emergency_save;
		2660	cf::write_runtime; # external watchdog should not bark
		2661
		2662	warn "syncing database to disk";
		2663	BDB::db_env_txn_checkpoint $DB_ENV;
		2664
		2665	# if anything goes wrong in here, we should simply crash as we already saved
		2666
		2667	warn "cancelling all WF_AUTOCANCEL watchers";
1087	$_->cancel for Event::all_watchers;	2668	for (Event::all_watchers) {
		2669	$_->cancel if $_->data & WF_AUTOCANCEL;
		2670	}
1088		2671
1089	# unload all extensions	2672	warn "flushing outstanding aio requests";
1090	for (@exts) {	2673	for (;;) {
1091	$msg->("unloading <$_>");	2674	BDB::flush;
1092	unload_extension $_;	2675	IO::AIO::flush;
		2676	Coro::cede;
		2677	last unless IO::AIO::nreqs || BDB::nreqs;
		2678	warn "iterate...";
		2679	}
		2680
		2681	++$RELOAD;
		2682
		2683	warn "cancelling all extension coros";
		2684	$_->cancel for values %EXT_CORO;
		2685	%EXT_CORO = ();
		2686
		2687	warn "removing commands";
		2688	%COMMAND = ();
		2689
		2690	warn "removing ext commands";
		2691	%EXTCMD = ();
		2692
		2693	warn "unloading/nuking all extensions";
		2694	for my $pkg (@EXTS) {
		2695	warn "... unloading $pkg";
		2696
		2697	if (my $cb = $pkg->can ("unload")) {
		2698	eval {
		2699	$cb->($pkg);
		2700	1
		2701	} or warn "$pkg unloaded, but with errors: $@";
1093	}	2702	}
1094		2703
		2704	warn "... nuking $pkg";
		2705	Symbol::delete_package $pkg;
		2706	}
		2707
1095	# unload all modules loaded from $LIBDIR	2708	warn "unloading all perl modules loaded from $LIBDIR";
1096	while (my ($k, $v) = each %INC) {	2709	while (my ($k, $v) = each %INC) {
1097	next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;	2710	next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;
1098		2711
1099	$msg->("removing <$k>");	2712	warn "... unloading $k";
1100	delete $INC{$k};	2713	delete $INC{$k};
1101		2714
1102	$k =~ s/\.pm$//;	2715	$k =~ s/\.pm$//;
1103	$k =~ s/\//::/g;	2716	$k =~ s/\//::/g;
1104		2717
…		…
1107	}	2720	}
1108		2721
1109	Symbol::delete_package $k;	2722	Symbol::delete_package $k;
1110	}	2723	}
1111		2724
1112	# sync database to disk
1113	cf::db_sync;
1114
1115	# get rid of safe::, as good as possible	2725	warn "getting rid of safe::, as good as possible";
1116	Symbol::delete_package "safe::$_"	2726	Symbol::delete_package "safe::$_"
1117	for qw(cf::object cf::object::player cf::player cf::map cf::party cf::region);	2727	for qw(cf::attachable cf::object cf::object::player cf::client cf::player cf::map cf::party cf::region);
1118		2728
1119	# remove register_script_function callbacks
1120	# TODO
1121
1122	# unload cf.pm "a bit"	2729	warn "unloading cf.pm \"a bit\"";
1123	delete $INC{"cf.pm"};	2730	delete $INC{"cf.pm"};
		2731	delete $INC{"cf/pod.pm"};
1124		2732
1125	# don't, removes xs symbols, too,	2733	# don't, removes xs symbols, too,
1126	# and global variables created in xs	2734	# and global variables created in xs
1127	#Symbol::delete_package __PACKAGE__;	2735	#Symbol::delete_package __PACKAGE__;
1128		2736
1129	# reload cf.pm	2737	warn "unload completed, starting to reload now";
		2738
1130	$msg->("reloading cf.pm");	2739	warn "reloading cf.pm";
1131	require cf;	2740	require cf;
		2741	cf::_connect_to_perl; # nominally unnecessary, but cannot hurt
1132		2742
1133	# load config and database again	2743	warn "loading config and database again";
1134	cf::cfg_load;	2744	cf::cfg_load;
1135	cf::db_load;
1136		2745
1137	# load extensions	2746	warn "loading extensions";
1138	$msg->("load extensions");
1139	cf::load_extensions;	2747	cf::load_extensions;
1140		2748
1141	# reattach attachments to objects	2749	warn "reattaching attachments to objects/players";
1142	$msg->("reattach");	2750	_global_reattach; # objects, sockets
1143	_global_reattach;	2751	warn "reattaching attachments to maps";
		2752	reattach $_ for values %MAP;
		2753	warn "reattaching attachments to players";
		2754	reattach $_ for values %PLAYER;
		2755
		2756	warn "leaving sync_job";
		2757
		2758	1
		2759	} or do {
		2760	warn $@;
		2761	warn "error while reloading, exiting.";
		2762	exit 1;
1144	};	2763	};
1145	$msg->($@) if $@;
1146		2764
1147	$msg->("reloaded");	2765	warn "reloaded";
1148	};	2766	};
1149		2767
1150	sub perl_reload() {	2768	our $RELOAD_WATCHER; # used only during reload
1151	_perl_reload {	2769
1152	warn $_[0];	2770	sub reload_perl() {
1153	print "$_[0]\n";	2771	# doing reload synchronously and two reloads happen back-to-back,
		2772	# coro crashes during coro_state_free->destroy here.
		2773
		2774	$RELOAD_WATCHER ||= Event->timer (
		2775	reentrant => 0,
		2776	after => 0,
		2777	data => WF_AUTOCANCEL,
		2778	cb => sub {
		2779	do_reload_perl;
		2780	undef $RELOAD_WATCHER;
		2781	},
1154	};	2782	);
1155	}	2783	}
1156		2784
1157	register_command "perl-reload", 0, sub {	2785	register_command "reload" => sub {
1158	my ($who, $arg) = @_;	2786	my ($who, $arg) = @_;
1159		2787
1160	if ($who->flag (FLAG_WIZ)) {	2788	if ($who->flag (FLAG_WIZ)) {
1161	_perl_reload {	2789	$who->message ("reloading server.");
1162	warn $_[0];	2790	async { reload_perl };
1163	$who->message ($_[0]);
1164	};
1165	}	2791	}
1166	};	2792	};
1167		2793
1168	register "<global>", __PACKAGE__;
1169
1170	unshift @INC, $LIBDIR;	2794	unshift @INC, $LIBDIR;
1171		2795
		2796	my $bug_warning = 0;
		2797
		2798	our @WAIT_FOR_TICK;
		2799	our @WAIT_FOR_TICK_BEGIN;
		2800
		2801	sub wait_for_tick {
		2802	return unless $TICK_WATCHER->is_active;
		2803	return if $Coro::current == $Coro::main;
		2804
		2805	my $signal = new Coro::Signal;
		2806	push @WAIT_FOR_TICK, $signal;
		2807	$signal->wait;
		2808	}
		2809
		2810	sub wait_for_tick_begin {
		2811	return unless $TICK_WATCHER->is_active;
		2812	return if $Coro::current == $Coro::main;
		2813
		2814	my $signal = new Coro::Signal;
		2815	push @WAIT_FOR_TICK_BEGIN, $signal;
		2816	$signal->wait;
		2817	}
		2818
1172	$TICK_WATCHER = Event->timer (	2819	$TICK_WATCHER = Event->timer (
		2820	reentrant => 0,
		2821	parked => 1,
1173	prio => 1,	2822	prio => 0,
1174	async => 1,
1175	at => $NEXT_TICK || 1,	2823	at => $NEXT_TICK || $TICK,
		2824	data => WF_AUTOCANCEL,
1176	cb => sub {	2825	cb => sub {
		2826	if ($Coro::current != $Coro::main) {
		2827	Carp::cluck "major BUG: server tick called outside of main coro, skipping it"
		2828	unless ++$bug_warning > 10;
		2829	return;
		2830	}
		2831
		2832	$NOW = Event::time;
		2833
1177	cf::server_tick; # one server iteration	2834	cf::server_tick; # one server iteration
1178		2835
1179	my $NOW = Event::time;	2836	$RUNTIME += $TICK;
1180	$NEXT_TICK += $TICK;	2837	$NEXT_TICK += $TICK;
1181		2838
		2839	if ($NOW >= $NEXT_RUNTIME_WRITE) {
		2840	$NEXT_RUNTIME_WRITE = $NOW + 10;
		2841	Coro::async_pool {
		2842	write_runtime
		2843	or warn "ERROR: unable to write runtime file: $!";
		2844	};
		2845	}
		2846
		2847	# my $AFTER = Event::time;
		2848	# warn $AFTER - $NOW;#d#
		2849
1182	# if we are delayed by four ticks or more, skip them all	2850	# if we are delayed by four ticks or more, skip them all
1183	$NEXT_TICK = $NOW if $NOW >= $NEXT_TICK + $TICK * 4;	2851	$NEXT_TICK = Event::time if Event::time >= $NEXT_TICK + $TICK * 4;
1184		2852
1185	$TICK_WATCHER->at ($NEXT_TICK);	2853	$TICK_WATCHER->at ($NEXT_TICK);
1186	$TICK_WATCHER->start;	2854	$TICK_WATCHER->start;
		2855
		2856	if (my $sig = shift @WAIT_FOR_TICK_BEGIN) {
		2857	$sig->send;
		2858	}
		2859	while (my $sig = shift @WAIT_FOR_TICK) {
		2860	$sig->send;
		2861	}
		2862
		2863	_post_tick;
1187	},	2864	},
1188	);	2865	);
1189		2866
		2867	{
		2868	BDB::max_poll_time $TICK * 0.1;
		2869	$BDB_POLL_WATCHER = Event->io (
		2870	reentrant => 0,
		2871	fd => BDB::poll_fileno,
		2872	poll => 'r',
		2873	prio => 0,
		2874	data => WF_AUTOCANCEL,
		2875	cb => \&BDB::poll_cb,
		2876	);
		2877	BDB::min_parallel 8;
		2878
		2879	BDB::set_sync_prepare {
		2880	my $status;
		2881	my $current = $Coro::current;
		2882	(
		2883	sub {
		2884	$status = $!;
		2885	$current->ready; undef $current;
		2886	},
		2887	sub {
		2888	Coro::schedule while defined $current;
		2889	$! = $status;
		2890	},
		2891	)
		2892	};
		2893
		2894	unless ($DB_ENV) {
		2895	$DB_ENV = BDB::db_env_create;
		2896
		2897	cf::sync_job {
		2898	eval {
		2899	BDB::db_env_open
		2900	$DB_ENV,
		2901	$BDBDIR,
		2902	BDB::INIT_LOCK | BDB::INIT_LOG | BDB::INIT_MPOOL | BDB::INIT_TXN
		2903	| BDB::RECOVER | BDB::REGISTER | BDB::USE_ENVIRON | BDB::CREATE,
		2904	0666;
		2905
		2906	cf::cleanup "db_env_open($BDBDIR): $!" if $!;
		2907
		2908	$DB_ENV->set_flags (BDB::AUTO_COMMIT | BDB::REGION_INIT | BDB::TXN_NOSYNC, 1);
		2909	$DB_ENV->set_lk_detect;
		2910	};
		2911
		2912	cf::cleanup "db_env_open(db): $@" if $@;
		2913	};
		2914	}
		2915	}
		2916
		2917	{
		2918	IO::AIO::min_parallel 8;
		2919
		2920	undef $Coro::AIO::WATCHER;
1190	IO::AIO::max_poll_time $TICK * 0.2;	2921	IO::AIO::max_poll_time $TICK * 0.1;
1191		2922	$AIO_POLL_WATCHER = Event->io (
1192	Event->io (fd => IO::AIO::poll_fileno,	2923	reentrant => 0,
		2924	data => WF_AUTOCANCEL,
		2925	fd => IO::AIO::poll_fileno,
1193	poll => 'r',	2926	poll => 'r',
1194	prio => 5,	2927	prio => 6,
1195	cb => \&IO::AIO::poll_cb);	2928	cb => \&IO::AIO::poll_cb,
		2929	);
		2930	}
		2931
		2932	my $_log_backtrace;
		2933
		2934	sub _log_backtrace {
		2935	my ($msg, @addr) = @_;
		2936
		2937	$msg =~ s/\n//;
		2938
		2939	# limit the # of concurrent backtraces
		2940	if ($_log_backtrace < 2) {
		2941	++$_log_backtrace;
		2942	async {
		2943	my @bt = fork_call {
		2944	@addr = map { sprintf "%x", $_ } @addr;
		2945	my $self = (-f "/proc/$$/exe") ? "/proc/$$/exe" : $^X;
		2946	open my $fh, "exec addr2line -C -f -i -e \Q$self\E @addr 2>&1 |"
		2947	or die "addr2line: $!";
		2948
		2949	my @funcs;
		2950	my @res = <$fh>;
		2951	chomp for @res;
		2952	while (@res) {
		2953	my ($func, $line) = splice @res, 0, 2, ();
		2954	push @funcs, "[$func] $line";
		2955	}
		2956
		2957	@funcs
		2958	};
		2959
		2960	LOG llevInfo, "[ABT] $msg\n";
		2961	LOG llevInfo, "[ABT] $_\n" for @bt;
		2962	--$_log_backtrace;
		2963	};
		2964	} else {
		2965	LOG llevInfo, "[ABT] $msg\n";
		2966	LOG llevInfo, "[ABT] [suppressed]\n";
		2967	}
		2968	}
		2969
		2970	# load additional modules
		2971	use cf::pod;
		2972
		2973	END { cf::emergency_save }
1196		2974
1197	1	2975	1
1198		2976

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