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Comparing deliantra/server/lib/cf.pm (file contents):
Revision 1.62 by root, Fri Sep 8 16:51:44 2006 UTC vs.
Revision 1.256 by root, Sat Apr 21 16:56:32 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
		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;
		29	use YAML::Syck ();
		30	use IO::AIO 2.32 ();
10	use Time::HiRes;	31	use Time::HiRes;
11	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
12	$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
13		41
14	use strict;	42	# work around bug in YAML::Syck - bad news for perl6, will it be as broken wrt. unicode?
		43	$YAML::Syck::ImplicitUnicode = 1;
15		44
16	_reload_1;	45	$Coro::main->prio (Coro::PRIO_MAX); # run main coroutine ("the server") with very high priority
17		46
		47	sub WF_AUTOCANCEL () { 1 } # automatically cancel this watcher on reload
		48
18	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
19	our @EVENT;	58	our @EVENT;
20	our $LIBDIR = maps_directory "perl";
21		59
22	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(!)
23	our $TICK_WATCHER;	73	our $TICK_WATCHER;
		74	our $AIO_POLL_WATCHER;
		75	our $NEXT_RUNTIME_WRITE; # when should the runtime file be written
24	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;
		82
		83	our %CFG;
		84
		85	our $UPTIME; $UPTIME ||= time;
		86	our $RUNTIME;
		87
		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;
		111
		112	#############################################################################
		113
		114	=head2 GLOBAL VARIABLES
		115
		116	=over 4
		117
		118	=item $cf::UPTIME
		119
		120	The timestamp of the server start (so not actually an uptime).
		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.
		139
		140	=item $cf::TICK
		141
		142	The interval between server ticks, in seconds.
		143
		144	=item %cf::CFG
		145
		146	Configuration for the server, loaded from C</etc/crossfire/config>, or
		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.
		154
		155	=back
		156
		157	=cut
25		158
26	BEGIN {	159	BEGIN {
27	*CORE::GLOBAL::warn = sub {	160	*CORE::GLOBAL::warn = sub {
28	my $msg = join "", @_;	161	my $msg = join "", @_;
		162
29	$msg .= "\n"	163	$msg .= "\n"
30	unless $msg =~ /\n$/;	164	unless $msg =~ /\n$/;
31		165
32	print STDERR "cfperl: $msg";	166	$msg =~ s/([\x00-\x08\x0b-\x1f])/sprintf "\\x%02x", ord $1/ge;
		167
		168	utf8::encode $msg;
33	LOG llevError, "cfperl: $msg";	169	LOG llevError, $msg;
34	};	170	};
35	}	171	}
36		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';
37	@safe::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object';	178	@safe::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object';
38		179
39	# 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
40	# within the Safe compartment.	181	# within the Safe compartment.
41	for my $pkg (qw(cf::object cf::object::player cf::player cf::map cf::party cf::region cf::arch cf::living)) {	182	for my $pkg (qw(
		183	cf::global cf::attachable
		184	cf::object cf::object::player
		185	cf::client cf::player
		186	cf::arch cf::living
		187	cf::map cf::party cf::region
		188	)) {
42	no strict 'refs';	189	no strict 'refs';
43	@{"safe::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;	190	@{"safe::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;
44	}	191	}
45		192
46	$Event::DIED = sub {	193	$Event::DIED = sub {
47	warn "error in event callback: @_";	194	warn "error in event callback: @_";
48	};	195	};
49		196
50	my %ext_pkg;	197	=head2 UTILITY FUNCTIONS
51	my @exts;	198
52	my @hook;	199	=over 4
53	my %command;	200
54	my %extcmd;	201	=item dumpval $ref
		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
		224	use JSON::XS qw(to_json from_json); # TODO# replace by JSON::PC once working
		225
		226	=item $ref = cf::from_json $json
		227
		228	Converts a JSON string into the corresponding perl data structure.
		229
		230	=item $json = cf::to_json $ref
		231
		232	Converts a perl data structure into its JSON representation.
		233
		234	=item cf::lock_wait $string
		235
		236	Wait until the given lock is available. See cf::lock_acquire.
		237
		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	my $fh = aio_open "$runtime~", O_WRONLY | O_CREAT, 0644
		377	or return;
		378
		379	my $value = $cf::RUNTIME + 90 + 10;
		380	# 10 is the runtime save interval, for a monotonic clock
		381	# 60 allows for the watchdog to kill the server.
		382
		383	(aio_write $fh, 0, (length $value), $value, 0) <= 0
		384	and return;
		385
		386	# always fsync - this file is important
		387	aio_fsync $fh
		388	and return;
		389
		390	close $fh
		391	or return;
		392
		393	aio_rename "$runtime~", $runtime
		394	and return;
		395
		396	1
		397	}
		398
		399	=item cf::datalog type => key => value, ...
		400
		401	Log a datalog packet of the given type with the given key-value pairs.
		402
		403	=cut
		404
		405	sub datalog($@) {
		406	my ($type, %kv) = @_;
		407	warn "DATALOG ", JSON::XS->new->ascii->encode ({ %kv, type => $type });
		408	}
		409
		410	=back
		411
		412	=cut
55		413
56	#############################################################################	414	#############################################################################
57	# utility functions
58		415
59	use JSON::Syck (); # TODO# replace by JSON::PC once working	416	=head2 ATTACHABLE OBJECTS
60		417
61	sub from_json($) {	418	Many objects in crossfire are so-called attachable objects. That means you can
62	$JSON::Syck::ImplicitUnicode = 1; # work around JSON::Syck bugs	419	attach callbacks/event handlers (a collection of which is called an "attachment")
63	JSON::Syck::Load $_[0]	420	to it. All such attachable objects support the following methods.
64	}
65		421
66	sub to_json($) {	422	In the following description, CLASS can be any of C<global>, C<object>
67	$JSON::Syck::ImplicitUnicode = 0; # work around JSON::Syck bugs	423	C<player>, C<client> or C<map> (i.e. the attachable objects in
68	JSON::Syck::Dump $_[0]	424	crossfire+).
69	}
70
71	#############################################################################
72	# "new" plug-in system
73
74	=head3 EVENTS AND OBJECT ATTACHMENTS
75		425
76	=over 4	426	=over 4
77		427
78	=item $object->attach ($attachment, key => $value...)
79
80	=item $object->detach ($attachment)
81
82	Attach/detach a pre-registered attachment to an object.
83
84	=item $player->attach ($attachment, key => $value...)
85
86	=item $player->detach ($attachment)
87
88	Attach/detach a pre-registered attachment to a player.
89
90	=item $map->attach ($attachment, key => $value...)	428	=item $attachable->attach ($attachment, key => $value...)
91		429
92	=item $map->detach ($attachment)	430	=item $attachable->detach ($attachment)
93		431
94	Attach/detach a pre-registered attachment to a map.	432	Attach/detach a pre-registered attachment to a specific object and give it
		433	the specified key/value pairs as arguments.
95		434
96	=item $bool = $object->attached ($name)	435	Example, attach a minesweeper attachment to the given object, making it a
		436	10x10 minesweeper game:
97		437
98	=item $bool = $player->attached ($name)	438	$obj->attach (minesweeper => width => 10, height => 10);
99		439
100	=item $bool = $map->attached ($name)	440	=item $bool = $attachable->attached ($name)
101		441
102	Checks wether the named attachment is currently attached to the object.	442	Checks wether the named attachment is currently attached to the object.
103		443
104	=item cf::attach_global ...	444	=item cf::CLASS->attach ...
105		445
106	Attach handlers for global events.	446	=item cf::CLASS->detach ...
107		447
108	This and all following C<attach_*>-functions expect any number of the	448	Define an anonymous attachment and attach it to all objects of the given
109	following handler/hook descriptions:	449	CLASS. See the next function for an explanation of its arguments.
		450
		451	You can attach to global events by using the C<cf::global> class.
		452
		453	Example, log all player logins:
		454
		455	cf::player->attach (
		456	on_login => sub {
		457	my ($pl) = @_;
		458	...
		459	},
		460	);
		461
		462	Example, attach to the jeweler skill:
		463
		464	cf::object->attach (
		465	type => cf::SKILL,
		466	subtype => cf::SK_JEWELER,
		467	on_use_skill => sub {
		468	my ($sk, $ob, $part, $dir, $msg) = @_;
		469	...
		470	},
		471	);
		472
		473	=item cf::CLASS::attachment $name, ...
		474
		475	Register an attachment by C<$name> through which attachable objects of the
		476	given CLASS can refer to this attachment.
		477
		478	Some classes such as crossfire maps and objects can specify attachments
		479	that are attached at load/instantiate time, thus the need for a name.
		480
		481	These calls expect any number of the following handler/hook descriptions:
110		482
111	=over 4	483	=over 4
112		484
113	=item prio => $number	485	=item prio => $number
114		486
…		…
116	by another C<prio> setting). Lower priority handlers get executed	488	by another C<prio> setting). Lower priority handlers get executed
117	earlier. The default priority is C<0>, and many built-in handlers are	489	earlier. The default priority is C<0>, and many built-in handlers are
118	registered at priority C<-1000>, so lower priorities should not be used	490	registered at priority C<-1000>, so lower priorities should not be used
119	unless you know what you are doing.	491	unless you know what you are doing.
120		492
		493	=item type => $type
		494
		495	(Only for C<< cf::object->attach >> calls), limits the attachment to the
		496	given type of objects only (the additional parameter C<subtype> can be
		497	used to further limit to the given subtype).
		498
121	=item on_I<event> => \&cb	499	=item on_I<event> => \&cb
122		500
123	Call the given code reference whenever the named event happens (event is	501	Call the given code reference whenever the named event happens (event is
124	something like C<instantiate>, C<apply>, C<use_skill> and so on, and which	502	something like C<instantiate>, C<apply>, C<use_skill> and so on, and which
125	handlers are recognised generally depends on the type of object these	503	handlers are recognised generally depends on the type of object these
…		…
134	package and register them. Only handlers for eevents supported by the	512	package and register them. Only handlers for eevents supported by the
135	object/class are recognised.	513	object/class are recognised.
136		514
137	=back	515	=back
138		516
139	=item cf::attach_to_type $object_type, $subtype, ...	517	Example, define an attachment called "sockpuppet" that calls the given
		518	event handler when a monster attacks:
140		519
141	Attach handlers for a specific object type (e.g. TRANSPORT) and	520	cf::object::attachment sockpuppet =>
142	subtype. If C<$subtype> is zero or undef, matches all objects of the given	521	on_skill_attack => sub {
143	type.	522	my ($self, $victim) = @_;
144		523	...
145	=item cf::attach_to_objects ...
146
147	Attach handlers to all objects. Do not use this except for debugging or
148	very rare events, as handlers are (obviously) called for I<all> objects in
149	the game.
150
151	=item cf::attach_to_players ...
152
153	Attach handlers to all players.
154
155	=item cf::attach_to_maps ...
156
157	Attach handlers to all maps.
158
159	=item cf:register_attachment $name, ...
160
161	Register an attachment by name through which objects can refer to this
162	attachment.
163
164	=item cf:register_player_attachment $name, ...
165
166	Register an attachment by name through which players can refer to this
167	attachment.
168
169	=item cf:register_map_attachment $name, ...
170
171	Register an attachment by name through which maps can refer to this
172	attachment.
173
174	=cut
175
176	# the following variables are defined in .xs and must not be re-created
177	our @CB_GLOBAL = (); # registry for all global events
178	our @CB_OBJECT = (); # all objects (should not be used except in emergency)
179	our @CB_PLAYER = ();
180	our @CB_TYPE = (); # registry for type (cf-object class) based events
181	our @CB_MAP = ();
182
183	my %attachment;
184
185	sub _attach_cb($\%$$$) {
186	my ($registry, $undo, $event, $prio, $cb) = @_;
187
188	use sort 'stable';
189
190	$cb = [$prio, $cb];
191
192	@{$registry->[$event]} = sort
193	{ $a->[0] cmp $b->[0] }
194	@{$registry->[$event] || []}, $cb;
195
196	push @{$undo->{cb}}, [$event, $cb];
197	}
198
199	# attach handles attaching event callbacks
200	# the only thing the caller has to do is pass the correct
201	# registry (== where the callback attaches to).
202	sub _attach(\@$@) {
203	my ($registry, $klass, @arg) = @_;
204
205	my $prio = 0;
206
207	my %undo = (
208	registry => $registry,
209	cb => [],
210	);
211
212	my %cb_id = map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == $klass, 0 .. $#EVENT;
213
214	while (@arg) {
215	my $type = shift @arg;
216
217	if ($type eq "prio") {
218	$prio = shift @arg;
219
220	} elsif ($type eq "package") {
221	my $pkg = shift @arg;
222
223	while (my ($name, $id) = each %cb_id) {
224	if (my $cb = $pkg->can ($name)) {
225	_attach_cb $registry, %undo, $id, $prio, $cb;
226	}
227	}	524	}
228
229	} elsif (exists $cb_id{$type}) {
230	_attach_cb $registry, %undo, $cb_id{$type}, $prio, shift @arg;
231
232	} elsif (ref $type) {
233	warn "attaching objects not supported, ignoring.\n";
234
235	} else {
236	shift @arg;
237	warn "attach argument '$type' not supported, ignoring.\n";
238	}
239	}
240
241	\%undo
242	}
243
244	sub _attach_attachment {
245	my ($obj, $name, %arg) = @_;
246
247	return if exists $obj->{_attachment}{$name};
248
249	my $res;
250
251	if (my $attach = $attachment{$name}) {
252	my $registry = $obj->registry;
253
254	for (@$attach) {
255	my ($klass, @attach) = @$_;
256	$res = _attach @$registry, $klass, @attach;
257	}
258
259	$obj->{$name} = \%arg;
260	} else {
261	warn "object uses attachment '$name' that is not available, postponing.\n";
262	}
263
264	$obj->{_attachment}{$name} = undef;
265
266	$res->{attachment} = $name;
267	$res
268	}
269
270	*cf::object::attach =
271	*cf::player::attach =
272	*cf::map::attach = sub {
273	my ($obj, $name, %arg) = @_;
274
275	_attach_attachment $obj, $name, %arg;
276	};
277
278	# all those should be optimised
279	*cf::object::detach =
280	*cf::player::detach =
281	*cf::map::detach = sub {
282	my ($obj, $name) = @_;
283
284	delete $obj->{_attachment}{$name};
285	reattach ($obj);
286	};
287
288	*cf::object::attached =
289	*cf::player::attached =
290	*cf::map::attached = sub {
291	my ($obj, $name) = @_;
292
293	exists $obj->{_attachment}{$name}
294	};
295
296	sub attach_global {
297	_attach @CB_GLOBAL, KLASS_GLOBAL, @_
298	}
299
300	sub attach_to_type {
301	my $type = shift;
302	my $subtype = shift;
303
304	_attach @{$CB_TYPE[$type + $subtype * NUM_SUBTYPES]}, KLASS_OBJECT, @_
305	}
306
307	sub attach_to_objects {
308	_attach @CB_OBJECT, KLASS_OBJECT, @_
309	}
310
311	sub attach_to_players {
312	_attach @CB_PLAYER, KLASS_PLAYER, @_
313	}
314
315	sub attach_to_maps {
316	_attach @CB_MAP, KLASS_MAP, @_
317	}
318
319	sub register_attachment {
320	my $name = shift;
321
322	$attachment{$name} = [[KLASS_OBJECT, @_]];
323	}
324
325	sub register_player_attachment {
326	my $name = shift;
327
328	$attachment{$name} = [[KLASS_PLAYER, @_]];
329	}
330
331	sub register_map_attachment {
332	my $name = shift;
333
334	$attachment{$name} = [[KLASS_MAP, @_]];
335	}
336
337	our $override;
338	our @invoke_results = (); # referenced from .xs code. TODO: play tricks with reify and mortals?
339
340	sub override {
341	$override = 1;
342	@invoke_results = ();
343	}
344
345	sub do_invoke {
346	my $event = shift;
347	my $callbacks = shift;
348
349	@invoke_results = ();
350
351	local $override;
352
353	for (@$callbacks) {
354	eval { &{$_->[1]} };
355
356	if ($@) {
357	warn "$@";
358	warn "... while processing $EVENT[$event][0] event, skipping processing altogether.\n";
359	override;
360	}
361
362	return 1 if $override;
363	}
364
365	0	525	}
366	}
367		526
368	=item $bool = cf::invoke EVENT_GLOBAL_XXX, ...	527	=item $attachable->valid
369
370	=item $bool = $object->invoke (EVENT_OBJECT_XXX, ...)
371
372	=item $bool = $player->invoke (EVENT_PLAYER_XXX, ...)
373
374	=item $bool = $map->invoke (EVENT_MAP_XXX, ...)
375
376	Generate a global/object/player/map-specific event with the given arguments.
377
378	This API is preliminary (most likely, the EVENT_KLASS_xxx prefix will be
379	removed in future versions), and there is no public API to access override
380	results (if you must, access C<@cf::invoke_results> directly).
381
382	=back
383
384	=head2 methods valid for all pointers
385
386	=over 4
387
388	=item $object->valid
389
390	=item $player->valid
391
392	=item $map->valid
393		528
394	Just because you have a perl object does not mean that the corresponding	529	Just because you have a perl object does not mean that the corresponding
395	C-level object still exists. If you try to access an object that has no	530	C-level object still exists. If you try to access an object that has no
396	valid C counterpart anymore you get an exception at runtime. This method	531	valid C counterpart anymore you get an exception at runtime. This method
397	can be used to test for existence of the C object part without causing an	532	can be used to test for existence of the C object part without causing an
398	exception.	533	exception.
399		534
		535	=cut
		536
		537	# the following variables are defined in .xs and must not be re-created
		538	our @CB_GLOBAL = (); # registry for all global events
		539	our @CB_ATTACHABLE = (); # registry for all attachables
		540	our @CB_OBJECT = (); # all objects (should not be used except in emergency)
		541	our @CB_PLAYER = ();
		542	our @CB_CLIENT = ();
		543	our @CB_TYPE = (); # registry for type (cf-object class) based events
		544	our @CB_MAP = ();
		545
		546	my %attachment;
		547
		548	sub cf::attachable::thawer_merge {
		549	# simply override everything except _meta
		550	local $_[0]{_meta};
		551	%{$_[0]} = %{$_[1]};
		552	}
		553
		554	sub _attach_cb($$$$) {
		555	my ($registry, $event, $prio, $cb) = @_;
		556
		557	use sort 'stable';
		558
		559	$cb = [$prio, $cb];
		560
		561	@{$registry->[$event]} = sort
		562	{ $a->[0] cmp $b->[0] }
		563	@{$registry->[$event] || []}, $cb;
		564	}
		565
		566	# hack
		567	my %attachable_klass = map +($_ => 1), KLASS_OBJECT, KLASS_CLIENT, KLASS_PLAYER, KLASS_MAP;
		568
		569	# attach handles attaching event callbacks
		570	# the only thing the caller has to do is pass the correct
		571	# registry (== where the callback attaches to).
		572	sub _attach {
		573	my ($registry, $klass, @arg) = @_;
		574
		575	my $object_type;
		576	my $prio = 0;
		577	my %cb_id = map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == $klass, 0 .. $#EVENT;
		578
		579	#TODO: get rid of this hack
		580	if ($attachable_klass{$klass}) {
		581	%cb_id = (%cb_id, map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == KLASS_ATTACHABLE, 0 .. $#EVENT);
		582	}
		583
		584	while (@arg) {
		585	my $type = shift @arg;
		586
		587	if ($type eq "prio") {
		588	$prio = shift @arg;
		589
		590	} elsif ($type eq "type") {
		591	$object_type = shift @arg;
		592	$registry = $CB_TYPE[$object_type] ||= [];
		593
		594	} elsif ($type eq "subtype") {
		595	defined $object_type or Carp::croak "subtype specified without type";
		596	my $object_subtype = shift @arg;
		597	$registry = $CB_TYPE[$object_type + $object_subtype * NUM_SUBTYPES] ||= [];
		598
		599	} elsif ($type eq "package") {
		600	my $pkg = shift @arg;
		601
		602	while (my ($name, $id) = each %cb_id) {
		603	if (my $cb = $pkg->can ($name)) {
		604	_attach_cb $registry, $id, $prio, $cb;
		605	}
		606	}
		607
		608	} elsif (exists $cb_id{$type}) {
		609	_attach_cb $registry, $cb_id{$type}, $prio, shift @arg;
		610
		611	} elsif (ref $type) {
		612	warn "attaching objects not supported, ignoring.\n";
		613
		614	} else {
		615	shift @arg;
		616	warn "attach argument '$type' not supported, ignoring.\n";
		617	}
		618	}
		619	}
		620
		621	sub _object_attach {
		622	my ($obj, $name, %arg) = @_;
		623
		624	return if exists $obj->{_attachment}{$name};
		625
		626	if (my $attach = $attachment{$name}) {
		627	my $registry = $obj->registry;
		628
		629	for (@$attach) {
		630	my ($klass, @attach) = @$_;
		631	_attach $registry, $klass, @attach;
		632	}
		633
		634	$obj->{$name} = \%arg;
		635	} else {
		636	warn "object uses attachment '$name' that is not available, postponing.\n";
		637	}
		638
		639	$obj->{_attachment}{$name} = undef;
		640	}
		641
		642	sub cf::attachable::attach {
		643	if (ref $_[0]) {
		644	_object_attach @_;
		645	} else {
		646	_attach shift->_attach_registry, @_;
		647	}
		648	};
		649
		650	# all those should be optimised
		651	sub cf::attachable::detach {
		652	my ($obj, $name) = @_;
		653
		654	if (ref $obj) {
		655	delete $obj->{_attachment}{$name};
		656	reattach ($obj);
		657	} else {
		658	Carp::croak "cannot, currently, detach class attachments";
		659	}
		660	};
		661
		662	sub cf::attachable::attached {
		663	my ($obj, $name) = @_;
		664
		665	exists $obj->{_attachment}{$name}
		666	}
		667
		668	for my $klass (qw(ATTACHABLE GLOBAL OBJECT PLAYER CLIENT MAP)) {
		669	eval "#line " . __LINE__ . " 'cf.pm'
		670	sub cf::\L$klass\E::_attach_registry {
		671	(\\\@CB_$klass, KLASS_$klass)
		672	}
		673
		674	sub cf::\L$klass\E::attachment {
		675	my \$name = shift;
		676
		677	\$attachment{\$name} = [[KLASS_$klass, \@_]];
		678	}
		679	";
		680	die if $@;
		681	}
		682
		683	our $override;
		684	our @invoke_results = (); # referenced from .xs code. TODO: play tricks with reify and mortals?
		685
		686	sub override {
		687	$override = 1;
		688	@invoke_results = ();
		689	}
		690
		691	sub do_invoke {
		692	my $event = shift;
		693	my $callbacks = shift;
		694
		695	@invoke_results = ();
		696
		697	local $override;
		698
		699	for (@$callbacks) {
		700	eval { &{$_->[1]} };
		701
		702	if ($@) {
		703	warn "$@";
		704	warn "... while processing $EVENT[$event][0](@_) event, skipping processing altogether.\n";
		705	override;
		706	}
		707
		708	return 1 if $override;
		709	}
		710
		711	0
		712	}
		713
		714	=item $bool = cf::global::invoke (EVENT_CLASS_XXX, ...)
		715
		716	=item $bool = $attachable->invoke (EVENT_CLASS_XXX, ...)
		717
		718	Generate an object-specific event with the given arguments.
		719
		720	This API is preliminary (most likely, the EVENT_CLASS_xxx prefix will be
		721	removed in future versions), and there is no public API to access override
		722	results (if you must, access C<@cf::invoke_results> directly).
		723
400	=back	724	=back
401		725
402	=cut	726	=cut
403
404	*cf::object::valid =
405	*cf::player::valid =
406	*cf::map::valid = \&cf::_valid;
407		727
408	#############################################################################	728	#############################################################################
409	# object support	729	# object support
410		730
411	sub instantiate {
412	my ($obj, $data) = @_;
413
414	$data = from_json $data;
415
416	for (@$data) {
417	my ($name, $args) = @$_;
418
419	$obj->attach ($name, %{$args || {} });
420	}
421	}
422
423	# basically do the same as instantiate, without calling instantiate
424	sub reattach {	731	sub reattach {
		732	# basically do the same as instantiate, without calling instantiate
425	my ($obj) = @_;	733	my ($obj) = @_;
		734
		735	bless $obj, ref $obj; # re-bless in case extensions have been reloaded
		736
426	my $registry = $obj->registry;	737	my $registry = $obj->registry;
427		738
428	@$registry = ();	739	@$registry = ();
429		740
430	delete $obj->{_attachment} unless scalar keys %{ $obj->{_attachment} || {} };	741	delete $obj->{_attachment} unless scalar keys %{ $obj->{_attachment} || {} };
431		742
432	for my $name (keys %{ $obj->{_attachment} || {} }) {	743	for my $name (keys %{ $obj->{_attachment} || {} }) {
433	if (my $attach = $attachment{$name}) {	744	if (my $attach = $attachment{$name}) {
434	for (@$attach) {	745	for (@$attach) {
435	my ($klass, @attach) = @$_;	746	my ($klass, @attach) = @$_;
436	_attach @$registry, $klass, @attach;	747	_attach $registry, $klass, @attach;
437	}	748	}
438	} else {	749	} else {
439	warn "object uses attachment '$name' that is not available, postponing.\n";	750	warn "object uses attachment '$name' that is not available, postponing.\n";
440	}	751	}
441	}	752	}
442	}	753	}
443		754
444	sub object_freezer_save {	755	cf::attachable->attach (
445	my ($filename, $rdata, $objs) = @_;
446
447	if (length $$rdata) {
448	warn sprintf "saving %s (%d,%d)\n",
449	$filename, length $$rdata, scalar @$objs;
450
451	if (open my $fh, ">:raw", "$filename~") {
452	chmod SAVE_MODE, $fh;
453	syswrite $fh, $$rdata;
454	close $fh;
455
456	if (@$objs && open my $fh, ">:raw", "$filename.pst~") {
457	chmod SAVE_MODE, $fh;
458	syswrite $fh, Storable::nfreeze { version => 1, objs => $objs };
459	close $fh;
460	rename "$filename.pst~", "$filename.pst";
461	} else {
462	unlink "$filename.pst";
463	}
464
465	rename "$filename~", $filename;
466	} else {
467	warn "FATAL: $filename~: $!\n";
468	}
469	} else {
470	unlink $filename;
471	unlink "$filename.pst";
472	}
473	}
474
475	sub object_thawer_load {
476	my ($filename) = @_;
477
478	local $/;
479
480	my $av;
481
482	#TODO: use sysread etc.
483	if (open my $data, "<:raw:perlio", $filename) {
484	$data = <$data>;
485	if (open my $pst, "<:raw:perlio", "$filename.pst") {
486	$av = eval { (Storable::thaw <$pst>)->{objs} };
487	}
488	return ($data, $av);
489	}
490
491	()
492	}
493
494	attach_to_objects
495	prio => -1000000,	756	prio => -1000000,
		757	on_instantiate => sub {
		758	my ($obj, $data) = @_;
		759
		760	$data = from_json $data;
		761
		762	for (@$data) {
		763	my ($name, $args) = @$_;
		764
		765	$obj->attach ($name, %{$args || {} });
		766	}
		767	},
		768	on_reattach => \&reattach,
496	on_clone => sub {	769	on_clone => sub {
497	my ($src, $dst) = @_;	770	my ($src, $dst) = @_;
498		771
499	@{$dst->registry} = @{$src->registry};	772	@{$dst->registry} = @{$src->registry};
500		773
501	%$dst = %$src;	774	%$dst = %$src;
502		775
503	%{$dst->{_attachment}} = %{$src->{_attachment}}	776	%{$dst->{_attachment}} = %{$src->{_attachment}}
504	if exists $src->{_attachment};	777	if exists $src->{_attachment};
505	},	778	},
506	;	779	);
		780
		781	sub object_freezer_save {
		782	my ($filename, $rdata, $objs) = @_;
		783
		784	sync_job {
		785	if (length $$rdata) {
		786	warn sprintf "saving %s (%d,%d)\n",
		787	$filename, length $$rdata, scalar @$objs;
		788
		789	if (my $fh = aio_open "$filename~", O_WRONLY | O_CREAT, 0600) {
		790	chmod SAVE_MODE, $fh;
		791	aio_write $fh, 0, (length $$rdata), $$rdata, 0;
		792	aio_fsync $fh if $cf::USE_FSYNC;
		793	close $fh;
		794
		795	if (@$objs) {
		796	if (my $fh = aio_open "$filename.pst~", O_WRONLY | O_CREAT, 0600) {
		797	chmod SAVE_MODE, $fh;
		798	my $data = Storable::nfreeze { version => 1, objs => $objs };
		799	aio_write $fh, 0, (length $data), $data, 0;
		800	aio_fsync $fh if $cf::USE_FSYNC;
		801	close $fh;
		802	aio_rename "$filename.pst~", "$filename.pst";
		803	}
		804	} else {
		805	aio_unlink "$filename.pst";
		806	}
		807
		808	aio_rename "$filename~", $filename;
		809	} else {
		810	warn "FATAL: $filename~: $!\n";
		811	}
		812	} else {
		813	aio_unlink $filename;
		814	aio_unlink "$filename.pst";
		815	}
		816	}
		817	}
		818
		819	sub object_freezer_as_string {
		820	my ($rdata, $objs) = @_;
		821
		822	use Data::Dumper;
		823
		824	$$rdata . Dumper $objs
		825	}
		826
		827	sub object_thawer_load {
		828	my ($filename) = @_;
		829
		830	my ($data, $av);
		831
		832	(aio_load $filename, $data) >= 0
		833	or return;
		834
		835	unless (aio_stat "$filename.pst") {
		836	(aio_load "$filename.pst", $av) >= 0
		837	or return;
		838	$av = eval { (Storable::thaw $av)->{objs} };
		839	}
		840
		841	warn sprintf "loading %s (%d)\n",
		842	$filename, length $data, scalar @{$av || []};#d#
		843	return ($data, $av);
		844	}
507		845
508	#############################################################################	846	#############################################################################
509	# old plug-in events	847	# command handling &c
510		848
511	sub inject_event {	849	=item cf::register_command $name => \&callback($ob,$args);
512	my $extension = shift;
513	my $event_code = shift;
514		850
515	my $cb = $hook[$event_code]{$extension}	851	Register a callback for execution when the client sends the user command
516	or return;	852	$name.
517		853
518	&$cb	854	=cut
519	}
520
521	sub inject_global_event {
522	my $event = shift;
523
524	my $cb = $hook[$event]
525	or return;
526
527	List::Util::max map &$_, values %$cb
528	}
529
530	sub inject_command {
531	my ($name, $obj, $params) = @_;
532
533	for my $cmd (@{ $command{$name} }) {
534	$cmd->[1]->($obj, $params);
535	}
536
537	-1
538	}
539		855
540	sub register_command {	856	sub register_command {
541	my ($name, $time, $cb) = @_;	857	my ($name, $cb) = @_;
542		858
543	my $caller = caller;	859	my $caller = caller;
544	#warn "registering command '$name/$time' to '$caller'";	860	#warn "registering command '$name/$time' to '$caller'";
545		861
546	push @{ $command{$name} }, [$time, $cb, $caller];	862	push @{ $COMMAND{$name} }, [$caller, $cb];
547	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @{ $command{$name} };
548	}	863	}
		864
		865	=item cf::register_extcmd $name => \&callback($pl,$packet);
		866
		867	Register a callbackf ro execution when the client sends an extcmd packet.
		868
		869	If the callback returns something, it is sent back as if reply was being
		870	called.
		871
		872	=cut
549		873
550	sub register_extcmd {	874	sub register_extcmd {
551	my ($name, $cb) = @_;	875	my ($name, $cb) = @_;
552		876
553	my $caller = caller;	877	$EXTCMD{$name} = $cb;
554	#warn "registering extcmd '$name' to '$caller'";
555
556	$extcmd{$name} = [$cb, $caller];
557	}	878	}
558		879
559	sub register {	880	cf::player->attach (
560	my ($base, $pkg) = @_;	881	on_command => sub {
		882	my ($pl, $name, $params) = @_;
561		883
562	#TODO	884	my $cb = $COMMAND{$name}
563	}	885	or return;
		886
		887	for my $cmd (@$cb) {
		888	$cmd->[1]->($pl->ob, $params);
		889	}
		890
		891	cf::override;
		892	},
		893	on_extcmd => sub {
		894	my ($pl, $buf) = @_;
		895
		896	my $msg = eval { from_json $buf };
		897
		898	if (ref $msg) {
		899	if (my $cb = $EXTCMD{$msg->{msgtype}}) {
		900	if (my %reply = $cb->($pl, $msg)) {
		901	$pl->ext_reply ($msg->{msgid}, %reply);
		902	}
		903	}
		904	} else {
		905	warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";
		906	}
		907
		908	cf::override;
		909	},
		910	);
564		911
565	sub load_extension {	912	sub load_extension {
566	my ($path) = @_;	913	my ($path) = @_;
567		914
568	$path =~ /([^\/\\]+)\.ext$/ or die "$path";	915	$path =~ /([^\/\\]+)\.ext$/ or die "$path";
569	my $base = $1;	916	my $base = $1;
570	my $pkg = $1;	917	my $pkg = $1;
571	$pkg =~ s/[^[:word:]]/_/g;	918	$pkg =~ s/[^[:word:]]/_/g;
572	$pkg = "ext::$pkg";	919	$pkg = "ext::$pkg";
573		920
574	warn "loading '$path' into '$pkg'\n";	921	warn "... loading '$path' into '$pkg'\n";
575		922
576	open my $fh, "<:utf8", $path	923	open my $fh, "<:utf8", $path
577	or die "$path: $!";	924	or die "$path: $!";
578		925
579	my $source =	926	my $source =
580	"package $pkg; use strict; use utf8;\n"	927	"package $pkg; use strict; use utf8;\n"
581	. "#line 1 \"$path\"\n{\n"	928	. "#line 1 \"$path\"\n{\n"
582	. (do { local $/; <$fh> })	929	. (do { local $/; <$fh> })
583	. "\n};\n1";	930	. "\n};\n1";
584		931
585	eval $source	932	unless (eval $source) {
586	or die "$path: $@";	933	my $msg = $@ ? "$path: $@\n"
587		934	: "extension disabled.\n";
588	push @exts, $pkg;	935	if ($source =~ /^#!.*perl.*#.*MANDATORY/m) { # ugly match
589	$ext_pkg{$base} = $pkg;	936	warn $@;
590		937	warn "mandatory extension failed to load, exiting.\n";
591	# no strict 'refs';	938	exit 1;
592	# @{"$pkg\::ISA"} = ext::;	939	}
593		940	die $@;
594	register $base, $pkg;
595	}
596
597	sub unload_extension {
598	my ($pkg) = @_;
599
600	warn "removing extension $pkg\n";
601
602	# remove hooks
603	#TODO
604	# for my $idx (0 .. $#PLUGIN_EVENT) {
605	# delete $hook[$idx]{$pkg};
606	# }	941	}
607		942
608	# remove commands	943	push @EXTS, $pkg;
609	for my $name (keys %command) {
610	my @cb = grep $_->[2] ne $pkg, @{ $command{$name} };
611
612	if (@cb) {
613	$command{$name} = \@cb;
614	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @cb;
615	} else {
616	delete $command{$name};
617	delete $COMMAND{"$name\000"};
618	}
619	}
620
621	# remove extcmds
622	for my $name (grep $extcmd{$_}[1] eq $pkg, keys %extcmd) {
623	delete $extcmd{$name};
624	}
625
626	if (my $cb = $pkg->can ("unload")) {
627	eval {
628	$cb->($pkg);
629	1
630	} or warn "$pkg unloaded, but with errors: $@";
631	}
632
633	Symbol::delete_package $pkg;
634	}	944	}
635		945
636	sub load_extensions {	946	sub load_extensions {
637	my $LIBDIR = maps_directory "perl";
638
639	for my $ext (<$LIBDIR/*.ext>) {	947	for my $ext (<$LIBDIR/*.ext>) {
640	next unless -r $ext;	948	next unless -r $ext;
641	eval {	949	eval {
642	load_extension $ext;	950	load_extension $ext;
643	1	951	1
644	} or warn "$ext not loaded: $@";	952	} or warn "$ext not loaded: $@";
645	}	953	}
646	}	954	}
647		955
648	sub _perl_reload(&) {	956	#############################################################################
		957
		958	=head2 CORE EXTENSIONS
		959
		960	Functions and methods that extend core crossfire objects.
		961
		962	=cut
		963
		964	package cf::player;
		965
		966	use Coro::AIO;
		967
		968	=head3 cf::player
		969
		970	=over 4
		971
		972	=item cf::player::find $login
		973
		974	Returns the given player object, loading it if necessary (might block).
		975
		976	=cut
		977
		978	sub playerdir($) {
		979	"$PLAYERDIR/"
		980	. (ref $_[0] ? $_[0]->ob->name : $_[0])
		981	}
		982
		983	sub path($) {
		984	my $login = ref $_[0] ? $_[0]->ob->name : $_[0];
		985
		986	(playerdir $login) . "/playerdata"
		987	}
		988
		989	sub find_active($) {
		990	$cf::PLAYER{$_[0]}
		991	and $cf::PLAYER{$_[0]}->active
		992	and $cf::PLAYER{$_[0]}
		993	}
		994
		995	sub exists($) {
		996	my ($login) = @_;
		997
		998	$cf::PLAYER{$login}
		999	or cf::sync_job { !aio_stat path $login }
		1000	}
		1001
		1002	sub find($) {
		1003	return $cf::PLAYER{$_[0]} || do {
		1004	my $login = $_[0];
		1005
		1006	my $guard = cf::lock_acquire "user_find:$login";
		1007
		1008	$cf::PLAYER{$_[0]} || do {
		1009	# rename old playerfiles to new ones
		1010	#TODO: remove when no longer required
		1011	aio_link +(playerdir $login) . "/$login.pl.pst", (playerdir $login) . "/playerdata.pst";
		1012	aio_link +(playerdir $login) . "/$login.pl" , (playerdir $login) . "/playerdata";
		1013	aio_unlink +(playerdir $login) . "/$login.pl.pst";
		1014	aio_unlink +(playerdir $login) . "/$login.pl";
		1015
		1016	my $pl = load_pl path $login
		1017	or return;
		1018	$cf::PLAYER{$login} = $pl
		1019	}
		1020	}
		1021	}
		1022
		1023	sub save($) {
		1024	my ($pl) = @_;
		1025
		1026	return if $pl->{deny_save};
		1027
		1028	my $path = path $pl;
		1029	my $guard = cf::lock_acquire "user_save:$path";
		1030
		1031	return if $pl->{deny_save};
		1032
		1033	aio_mkdir playerdir $pl, 0770;
		1034	$pl->{last_save} = $cf::RUNTIME;
		1035
		1036	$pl->save_pl ($path);
		1037	Coro::cede;
		1038	}
		1039
		1040	sub new($) {
		1041	my ($login) = @_;
		1042
		1043	my $self = create;
		1044
		1045	$self->ob->name ($login);
		1046	$self->{deny_save} = 1;
		1047
		1048	$cf::PLAYER{$login} = $self;
		1049
		1050	$self
		1051	}
		1052
		1053	=item $pl->quit_character
		1054
		1055	Nukes the player without looking back. If logged in, the connection will
		1056	be destroyed. May block for a long time.
		1057
		1058	=cut
		1059
		1060	sub quit_character {
		1061	my ($pl) = @_;
		1062
		1063	my $name = $pl->ob->name;
		1064
		1065	$pl->{deny_save} = 1;
		1066	$pl->password ("*"); # this should lock out the player until we nuked the dir
		1067
		1068	$pl->invoke (cf::EVENT_PLAYER_LOGOUT, 1) if $pl->active;
		1069	$pl->deactivate;
		1070	$pl->invoke (cf::EVENT_PLAYER_QUIT);
		1071	$pl->ns->destroy if $pl->ns;
		1072
		1073	my $path = playerdir $pl;
		1074	my $temp = "$path~$cf::RUNTIME~deleting~";
		1075	aio_rename $path, $temp;
		1076	delete $cf::PLAYER{$pl->ob->name};
		1077	$pl->destroy;
		1078
		1079	my $prefix = qr<^~\Q$name\E/>;
		1080
		1081	# nuke player maps
		1082	$cf::MAP{$_}->nuke for grep /$prefix/, keys %cf::MAP;
		1083
		1084	IO::AIO::aio_rmtree $temp;
		1085	}
		1086
		1087	=item $pl->kick
		1088
		1089	Kicks a player out of the game. This destroys the connection.
		1090
		1091	=cut
		1092
		1093	sub kick {
		1094	my ($pl, $kicker) = @_;
		1095
		1096	$pl->invoke (cf::EVENT_PLAYER_KICK, $kicker);
		1097	$pl->killer ("kicked");
		1098	$pl->ns->destroy;
		1099	}
		1100
		1101	=item cf::player::list_logins
		1102
		1103	Returns am arrayref of all valid playernames in the system, can take a
		1104	while and may block, so not sync_job-capable, ever.
		1105
		1106	=cut
		1107
		1108	sub list_logins {
		1109	my $dirs = aio_readdir $PLAYERDIR
		1110	or return [];
		1111
		1112	my @logins;
		1113
		1114	for my $login (@$dirs) {
		1115	my $fh = aio_open path $login, Fcntl::O_RDONLY, 0 or next;
		1116	aio_read $fh, 0, 512, my $buf, 0 or next;
		1117	$buf !~ /^password -------------$/m or next; # official not-valid tag
		1118
		1119	utf8::decode $login;
		1120	push @logins, $login;
		1121	}
		1122
		1123	\@logins
		1124	}
		1125
		1126	=item $player->maps
		1127
		1128	Returns an arrayref of map paths that are private for this
		1129	player. May block.
		1130
		1131	=cut
		1132
		1133	sub maps($) {
		1134	my ($pl) = @_;
		1135
		1136	$pl = ref $pl ? $pl->ob->name : $pl;
		1137
		1138	my $files = aio_readdir playerdir $pl
		1139	or return;
		1140
		1141	my @paths;
		1142
		1143	for (@$files) {
		1144	utf8::decode $_;
		1145	next if /\.(?:pl|pst)$/;
		1146	next unless /^$PATH_SEP/o;
		1147
		1148	push @paths, cf::map::normalise "~$pl/$_";
		1149	}
		1150
		1151	\@paths
		1152	}
		1153
		1154	=item $player->ext_reply ($msgid, %msg)
		1155
		1156	Sends an ext reply to the player.
		1157
		1158	=cut
		1159
		1160	sub ext_reply($$%) {
		1161	my ($self, $id, %msg) = @_;
		1162
		1163	$msg{msgid} = $id;
		1164
		1165	$self->send ("ext " . cf::to_json \%msg);
		1166	}
		1167
		1168	=item $player->ext_event ($type, %msg)
		1169
		1170	Sends an ext event to the client.
		1171
		1172	=cut
		1173
		1174	sub ext_event($$%) {
		1175	my ($self, $type, %msg) = @_;
		1176
		1177	$self->ns->ext_event ($type, %msg);
		1178	}
		1179
		1180	=head3 cf::region
		1181
		1182	=over 4
		1183
		1184	=cut
		1185
		1186	package cf::region;
		1187
		1188	=item cf::region::find_by_path $path
		1189
		1190	Tries to decuce the probable region for a map knowing only its path.
		1191
		1192	=cut
		1193
		1194	sub find_by_path($) {
		1195	my ($path) = @_;
		1196
		1197	my ($match, $specificity);
		1198
		1199	for my $region (list) {
		1200	if ($region->match && $path =~ $region->match) {
		1201	($match, $specificity) = ($region, $region->specificity)
		1202	if $region->specificity > $specificity;
		1203	}
		1204	}
		1205
		1206	$match
		1207	}
		1208
		1209	=back
		1210
		1211	=head3 cf::map
		1212
		1213	=over 4
		1214
		1215	=cut
		1216
		1217	package cf::map;
		1218
		1219	use Fcntl;
		1220	use Coro::AIO;
		1221
		1222	use overload
		1223	'""' => \&as_string,
		1224	fallback => 1;
		1225
		1226	our $MAX_RESET = 3600;
		1227	our $DEFAULT_RESET = 3000;
		1228
		1229	sub generate_random_map {
		1230	my ($self, $rmp) = @_;
		1231	# mit "rum" bekleckern, nicht
		1232	$self->_create_random_map (
		1233	$rmp->{wallstyle}, $rmp->{wall_name}, $rmp->{floorstyle}, $rmp->{monsterstyle},
		1234	$rmp->{treasurestyle}, $rmp->{layoutstyle}, $rmp->{doorstyle}, $rmp->{decorstyle},
		1235	$rmp->{origin_map}, $rmp->{final_map}, $rmp->{exitstyle}, $rmp->{this_map},
		1236	$rmp->{exit_on_final_map},
		1237	$rmp->{xsize}, $rmp->{ysize},
		1238	$rmp->{expand2x}, $rmp->{layoutoptions1}, $rmp->{layoutoptions2}, $rmp->{layoutoptions3},
		1239	$rmp->{symmetry}, $rmp->{difficulty}, $rmp->{difficulty_given}, $rmp->{difficulty_increase},
		1240	$rmp->{dungeon_level}, $rmp->{dungeon_depth}, $rmp->{decoroptions}, $rmp->{orientation},
		1241	$rmp->{origin_y}, $rmp->{origin_x}, $rmp->{random_seed}, $rmp->{total_map_hp},
		1242	$rmp->{map_layout_style}, $rmp->{treasureoptions}, $rmp->{symmetry_used},
		1243	(cf::region::find $rmp->{region}), $rmp->{custom}
		1244	)
		1245	}
		1246
		1247	=item cf::map->register ($regex, $prio)
		1248
		1249	Register a handler for the map path matching the given regex at the
		1250	givne priority (higher is better, built-in handlers have priority 0, the
		1251	default).
		1252
		1253	=cut
		1254
		1255	sub register {
		1256	my (undef, $regex, $prio) = @_;
		1257	my $pkg = caller;
		1258
		1259	no strict;
		1260	push @{"$pkg\::ISA"}, __PACKAGE__;
		1261
		1262	$EXT_MAP{$pkg} = [$prio, qr<$regex>];
		1263	}
		1264
		1265	# also paths starting with '/'
		1266	$EXT_MAP{"cf::map"} = [0, qr{^(?=/)}];
		1267
		1268	sub thawer_merge {
		1269	my ($self, $merge) = @_;
		1270
		1271	# we have to keep some variables in memory intact
		1272	local $self->{path};
		1273	local $self->{load_path};
		1274	local $self->{deny_save};
		1275	local $self->{deny_reset};
		1276
		1277	$self->SUPER::thawer_merge ($merge);
		1278	}
		1279
		1280	sub normalise {
		1281	my ($path, $base) = @_;
		1282
		1283	$path = "$path"; # make sure its a string
		1284
		1285	$path =~ s/\.map$//;
		1286
		1287	# map plan:
		1288	#
		1289	# /! non-realised random map exit (special hack!)
		1290	# {... are special paths that are not being touched
		1291	# ?xxx/... are special absolute paths
		1292	# ?random/... random maps
		1293	# /... normal maps
		1294	# ~user/... per-player map of a specific user
		1295
		1296	$path =~ s/$PATH_SEP/\//go;
		1297
		1298	# treat it as relative path if it starts with
		1299	# something that looks reasonable
		1300	if ($path =~ m{^(?:\./|\.\./|\w)}) {
		1301	$base or Carp::carp "normalise called with relative path and no base: '$path'";
		1302
		1303	$base =~ s{[^/]+/?$}{};
		1304	$path = "$base/$path";
		1305	}
		1306
		1307	for ($path) {
		1308	redo if s{//}{/};
		1309	redo if s{/\.?/}{/};
		1310	redo if s{/[^/]+/\.\./}{/};
		1311	}
		1312
		1313	$path
		1314	}
		1315
		1316	sub new_from_path {
		1317	my (undef, $path, $base) = @_;
		1318
		1319	return $path if UNIVERSAL::isa $path, "cf::map"; # already a map object
		1320
		1321	$path = normalise $path, $base;
		1322
		1323	for my $pkg (sort { $EXT_MAP{$b}[0] <=> $EXT_MAP{$a}[0] } keys %EXT_MAP) {
		1324	if ($path =~ $EXT_MAP{$pkg}[1]) {
		1325	my $self = bless cf::map::new, $pkg;
		1326	$self->{path} = $path; $self->path ($path);
		1327	$self->init; # pass $1 etc.
		1328	return $self;
		1329	}
		1330	}
		1331
		1332	Carp::carp "unable to resolve path '$path' (base '$base').";
		1333	()
		1334	}
		1335
		1336	sub init {
649	my ($msg) = @_;	1337	my ($self) = @_;
650		1338
651	$msg->("reloading...");	1339	$self
		1340	}
652		1341
653	eval {	1342	sub as_string {
654	# 1. cancel all watchers	1343	my ($self) = @_;
655	$_->cancel for Event::all_watchers;
656		1344
657	# 2. unload all extensions	1345	"$self->{path}"
658	for (@exts) {	1346	}
659	$msg->("unloading <$_>");
660	unload_extension $_;
661	}
662		1347
663	# 3. unload all modules loaded from $LIBDIR	1348	# the displayed name, this is a one way mapping
664	while (my ($k, $v) = each %INC) {	1349	sub visible_name {
665	next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;	1350	&as_string
		1351	}
666		1352
667	$msg->("removing <$k>");	1353	# the original (read-only) location
668	delete $INC{$k};	1354	sub load_path {
		1355	my ($self) = @_;
669		1356
670	$k =~ s/\.pm$//;	1357	"$MAPDIR/$self->{path}.map"
671	$k =~ s/\//::/g;	1358	}
672		1359
673	if (my $cb = $k->can ("unload_module")) {	1360	# the temporary/swap location
674	$cb->();	1361	sub save_path {
		1362	my ($self) = @_;
		1363
		1364	(my $path = $_[0]{path}) =~ s/\//$PATH_SEP/g;
		1365	"$TMPDIR/$path.map"
		1366	}
		1367
		1368	# the unique path, undef == no special unique path
		1369	sub uniq_path {
		1370	my ($self) = @_;
		1371
		1372	(my $path = $_[0]{path}) =~ s/\//$PATH_SEP/g;
		1373	"$UNIQUEDIR/$path"
		1374	}
		1375
		1376	# and all this just because we cannot iterate over
		1377	# all maps in C++...
		1378	sub change_all_map_light {
		1379	my ($change) = @_;
		1380
		1381	$_->change_map_light ($change)
		1382	for grep $_->outdoor, values %cf::MAP;
		1383	}
		1384
		1385	sub unlink_save {
		1386	my ($self) = @_;
		1387
		1388	utf8::encode (my $save = $self->save_path);
		1389	IO::AIO::aioreq_pri 4; Coro::AIO::aio_unlink $save;
		1390	IO::AIO::aioreq_pri 4; Coro::AIO::aio_unlink "$save.pst";
		1391	}
		1392
		1393	sub load_header_from($) {
		1394	my ($self, $path) = @_;
		1395
		1396	utf8::encode $path;
		1397	#aio_open $path, O_RDONLY, 0
		1398	# or return;
		1399
		1400	$self->_load_header ($path)
		1401	or return;
		1402
		1403	$self->{load_path} = $path;
		1404
		1405	1
		1406	}
		1407
		1408	sub load_header_orig {
		1409	my ($self) = @_;
		1410
		1411	$self->load_header_from ($self->load_path)
		1412	}
		1413
		1414	sub load_header_temp {
		1415	my ($self) = @_;
		1416
		1417	$self->load_header_from ($self->save_path)
		1418	}
		1419
		1420	sub prepare_temp {
		1421	my ($self) = @_;
		1422
		1423	$self->last_access ((delete $self->{last_access})
		1424	|| $cf::RUNTIME); #d#
		1425	# safety
		1426	$self->{instantiate_time} = $cf::RUNTIME
		1427	if $self->{instantiate_time} > $cf::RUNTIME;
		1428	}
		1429
		1430	sub prepare_orig {
		1431	my ($self) = @_;
		1432
		1433	$self->{load_original} = 1;
		1434	$self->{instantiate_time} = $cf::RUNTIME;
		1435	$self->last_access ($cf::RUNTIME);
		1436	$self->instantiate;
		1437	}
		1438
		1439	sub load_header {
		1440	my ($self) = @_;
		1441
		1442	if ($self->load_header_temp) {
		1443	$self->prepare_temp;
		1444	} else {
		1445	$self->load_header_orig
		1446	or return;
		1447	$self->prepare_orig;
		1448	}
		1449
		1450	$self->default_region (cf::region::find_by_path $self->{path})
		1451	unless $self->default_region;
		1452
		1453	1
		1454	}
		1455
		1456	sub find;
		1457	sub find {
		1458	my ($path, $origin) = @_;
		1459
		1460	$path = normalise $path, $origin && $origin->path;
		1461
		1462	cf::lock_wait "map_find:$path";
		1463
		1464	$cf::MAP{$path} || do {
		1465	my $guard = cf::lock_acquire "map_find:$path";
		1466	my $map = new_from_path cf::map $path
		1467	or return;
		1468
		1469	$map->{last_save} = $cf::RUNTIME;
		1470
		1471	$map->load_header
		1472	or return;
		1473
		1474	if ($map->should_reset && 0) {#d#TODO# disabled, crashy (locking issue?)
		1475	# doing this can freeze the server in a sync job, obviously
		1476	#$cf::WAIT_FOR_TICK->wait;
		1477	$map->reset;
		1478	undef $guard;
		1479	return find $path;
		1480	}
		1481
		1482	$cf::MAP{$path} = $map
		1483	}
		1484	}
		1485
		1486	sub pre_load { }
		1487	sub post_load { }
		1488
		1489	sub load {
		1490	my ($self) = @_;
		1491
		1492	local $self->{deny_reset} = 1; # loading can take a long time
		1493
		1494	my $path = $self->{path};
		1495
		1496	{
		1497	my $guard = cf::lock_acquire "map_load:$path";
		1498
		1499	return if $self->in_memory != cf::MAP_SWAPPED;
		1500
		1501	$self->in_memory (cf::MAP_LOADING);
		1502
		1503	$self->alloc;
		1504
		1505	$self->pre_load;
		1506	Coro::cede;
		1507
		1508	$self->_load_objects ($self->{load_path}, 1)
		1509	or return;
		1510
		1511	$self->set_object_flag (cf::FLAG_OBJ_ORIGINAL, 1)
		1512	if delete $self->{load_original};
		1513
		1514	if (my $uniq = $self->uniq_path) {
		1515	utf8::encode $uniq;
		1516	if (aio_open $uniq, O_RDONLY, 0) {
		1517	$self->clear_unique_items;
		1518	$self->_load_objects ($uniq, 0);
675	}	1519	}
676
677	Symbol::delete_package $k;
678	}
679
680	# 4. get rid of safe::, as good as possible
681	Symbol::delete_package "safe::$_"
682	for qw(cf::object cf::object::player cf::player cf::map cf::party cf::region);
683
684	# 5. remove register_script_function callbacks
685	# TODO
686		1520	}
687	# 6. unload cf.pm "a bit"
688	delete $INC{"cf.pm"};
689		1521
690	# don't, removes xs symbols, too,	1522	Coro::cede;
691	# and global variables created in xs	1523	# now do the right thing for maps
692	#Symbol::delete_package __PACKAGE__;	1524	$self->link_multipart_objects;
		1525	$self->difficulty ($self->estimate_difficulty)
		1526	unless $self->difficulty;
		1527	Coro::cede;
693		1528
694	# 7. reload cf.pm	1529	unless ($self->{deny_activate}) {
695	$msg->("reloading cf.pm");	1530	$self->decay_objects;
696	require cf;	1531	$self->fix_auto_apply;
		1532	$self->update_buttons;
		1533	Coro::cede;
		1534	$self->set_darkness_map;
		1535	Coro::cede;
		1536	$self->activate;
		1537	}
697		1538
698	$msg->("load extensions");	1539	$self->in_memory (cf::MAP_IN_MEMORY);
699	cf::load_extensions;	1540
		1541	undef $guard;
		1542	}
		1543
		1544	$self->post_load;
		1545	}
		1546
		1547	sub customise_for {
		1548	my ($self, $ob) = @_;
		1549
		1550	return find "~" . $ob->name . "/" . $self->{path}
		1551	if $self->per_player;
		1552
		1553	$self
		1554	}
		1555
		1556	# find and load all maps in the 3x3 area around a map
		1557	sub load_diag {
		1558	my ($map) = @_;
		1559
		1560	my @diag; # diagonal neighbours
		1561
		1562	for (0 .. 3) {
		1563	my $neigh = $map->tile_path ($_)
		1564	or next;
		1565	$neigh = find $neigh, $map
		1566	or next;
		1567	$neigh->load;
		1568
		1569	push @diag, [$neigh->tile_path (($_ + 3) % 4), $neigh],
		1570	[$neigh->tile_path (($_ + 1) % 4), $neigh];
		1571	}
		1572
		1573	for (@diag) {
		1574	my $neigh = find @$_
		1575	or next;
		1576	$neigh->load;
		1577	}
		1578	}
		1579
		1580	sub find_sync {
		1581	my ($path, $origin) = @_;
		1582
		1583	cf::sync_job { find $path, $origin }
		1584	}
		1585
		1586	sub do_load_sync {
		1587	my ($map) = @_;
		1588
		1589	cf::sync_job { $map->load };
		1590	}
		1591
		1592	our %MAP_PREFETCH;
		1593	our $MAP_PREFETCHER = undef;
		1594
		1595	sub find_async {
		1596	my ($path, $origin) = @_;
		1597
		1598	$path = normalise $path, $origin && $origin->{path};
		1599
		1600	if (my $map = $cf::MAP{$path}) {
		1601	return $map if $map->in_memory == cf::MAP_IN_MEMORY;
		1602	}
		1603
		1604	undef $MAP_PREFETCH{$path};
		1605	$MAP_PREFETCHER ||= cf::async {
		1606	while (%MAP_PREFETCH) {
		1607	for my $path (keys %MAP_PREFETCH) {
		1608	my $map = find $path
		1609	or next;
		1610	$map->load;
		1611
		1612	delete $MAP_PREFETCH{$path};
		1613	}
		1614	}
		1615	undef $MAP_PREFETCHER;
700	};	1616	};
701	$msg->($@) if $@;	1617	$MAP_PREFETCHER->prio (6);
702		1618
703	$msg->("reloaded");	1619	()
704	};	1620	}
705		1621
706	sub perl_reload() {	1622	sub save {
707	_perl_reload {	1623	my ($self) = @_;
708	warn $_[0];	1624
709	print "$_[0]\n";	1625	my $lock = cf::lock_acquire "map_data:" . $self->path;
		1626
		1627	$self->{last_save} = $cf::RUNTIME;
		1628
		1629	return unless $self->dirty;
		1630
		1631	my $save = $self->save_path; utf8::encode $save;
		1632	my $uniq = $self->uniq_path; utf8::encode $uniq;
		1633
		1634	$self->{load_path} = $save;
		1635
		1636	return if $self->{deny_save};
		1637
		1638	local $self->{last_access} = $self->last_access;#d#
		1639
		1640	cf::async {
		1641	$_->contr->save for $self->players;
710	};	1642	};
711	}
712		1643
713	register_command "perl-reload", 0, sub {	1644	if ($uniq) {
714	my ($who, $arg) = @_;	1645	$self->_save_objects ($save, cf::IO_HEADER | cf::IO_OBJECTS);
715		1646	$self->_save_objects ($uniq, cf::IO_UNIQUES);
716	if ($who->flag (FLAG_WIZ)) {
717	_perl_reload {
718	warn $_[0];
719	$who->message ($_[0]);
720	};
721	}
722	};
723
724	#############################################################################
725	# extcmd framework, basically convert ext <msg>
726	# into pkg::->on_extcmd_arg1 (...) while shortcutting a few
727
728	attach_to_players
729	on_extcmd => sub {
730	my ($pl, $buf) = @_;
731
732	my $msg = eval { from_json $buf };
733
734	if (ref $msg) {
735	if (my $cb = $extcmd{$msg->{msgtype}}) {
736	if (my %reply = $cb->[0]->($pl, $msg)) {
737	$pl->ext_reply ($msg->{msgid}, %reply);
738	}
739	}
740	} else {	1647	} else {
741	warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";	1648	$self->_save_objects ($save, cf::IO_HEADER | cf::IO_OBJECTS | cf::IO_UNIQUES);
742	}
743
744	cf::override;
745	},	1649	}
746	;	1650	}
747		1651
748	#############################################################################	1652	sub swap_out {
749	# load/save/clean perl data associated with a map
750
751	*cf::mapsupport::on_clean = sub {
752	my ($map) = @_;	1653	my ($self) = @_;
753		1654
754	my $path = $map->tmpname;	1655	# save first because save cedes
755	defined $path or return;	1656	$self->save;
756		1657
757	unlink "$path.pst";	1658	my $lock = cf::lock_acquire "map_data:" . $self->path;
758	};
759		1659
760	attach_to_maps prio => -10000, package => cf::mapsupport::;	1660	return if $self->players;
		1661	return if $self->in_memory != cf::MAP_IN_MEMORY;
		1662	return if $self->{deny_save};
761		1663
762	#############################################################################	1664	$self->clear;
763	# load/save perl data associated with player->ob objects	1665	$self->in_memory (cf::MAP_SWAPPED);
764
765	sub all_objects(@) {
766	@_, map all_objects ($_->inv), @_
767	}	1666	}
768		1667
769	# TODO: compatibility cruft, remove when no longer needed	1668	sub reset_at {
770	attach_to_players	1669	my ($self) = @_;
771	on_load => sub {
772	my ($pl, $path) = @_;
773		1670
774	for my $o (all_objects $pl->ob) {	1671	# TODO: safety, remove and allow resettable per-player maps
775	if (my $value = $o->get_ob_key_value ("_perl_data")) {	1672	return 1e99 if $self->isa ("ext::map_per_player");#d#
776	$o->set_ob_key_value ("_perl_data");	1673	return 1e99 if $self->{deny_reset};
777		1674
778	%$o = %{ Storable::thaw pack "H*", $value };	1675	my $time = $self->fixed_resettime ? $self->{instantiate_time} : $self->last_access;
779	}	1676	my $to = List::Util::min $MAX_RESET, $self->reset_timeout || $DEFAULT_RESET;
780	}	1677
		1678	$time + $to
		1679	}
		1680
		1681	sub should_reset {
		1682	my ($self) = @_;
		1683
		1684	$self->reset_at <= $cf::RUNTIME
		1685	}
		1686
		1687	sub reset {
		1688	my ($self) = @_;
		1689
		1690	my $lock = cf::lock_acquire "map_data:$self->{path}";
		1691
		1692	return if $self->players;
		1693	return if $self->isa ("ext::map_per_player");#d#
		1694
		1695	warn "resetting map ", $self->path;#d#
		1696
		1697	$self->in_memory (cf::MAP_SWAPPED);
		1698
		1699	# need to save uniques path
		1700	unless ($self->{deny_save}) {
		1701	my $uniq = $self->uniq_path; utf8::encode $uniq;
		1702
		1703	$self->_save_objects ($uniq, cf::IO_UNIQUES)
		1704	if $uniq;
781	},	1705	}
782	;
783		1706
784	#############################################################################	1707	delete $cf::MAP{$self->path};
785	# core extensions - in perl
786		1708
787	=item cf::player::exists $login	1709	$self->clear;
788		1710
789	Returns true when the given account exists.	1711	$_->clear_links_to ($self) for values %cf::MAP;
790		1712
791	=cut	1713	$self->unlink_save;
792		1714	$self->destroy;
793	sub cf::player::exists($) {
794	cf::player::find $_[0]
795	or -f sprintf "%s/%s/%s/%s.pl", cf::localdir, cf::playerdir, ($_[0]) x 2;
796	}	1715	}
797		1716
		1717	my $nuke_counter = "aaaa";
		1718
		1719	sub nuke {
		1720	my ($self) = @_;
		1721
		1722	delete $cf::MAP{$self->path};
		1723
		1724	$self->unlink_save;
		1725
		1726	bless $self, "cf::map";
		1727	delete $self->{deny_reset};
		1728	$self->{deny_save} = 1;
		1729	$self->reset_timeout (1);
		1730	$self->path ($self->{path} = "{nuke}/" . ($nuke_counter++));
		1731
		1732	$cf::MAP{$self->path} = $self;
		1733
		1734	$self->reset; # polite request, might not happen
		1735	}
		1736
		1737	=item cf::map::unique_maps
		1738
		1739	Returns an arrayref of paths of all shared maps that have
		1740	instantiated unique items. May block.
		1741
		1742	=cut
		1743
		1744	sub unique_maps() {
		1745	my $files = aio_readdir $UNIQUEDIR
		1746	or return;
		1747
		1748	my @paths;
		1749
		1750	for (@$files) {
		1751	utf8::decode $_;
		1752	next if /\.pst$/;
		1753	next unless /^$PATH_SEP/o;
		1754
		1755	push @paths, cf::map::normalise $_;
		1756	}
		1757
		1758	\@paths
		1759	}
		1760
		1761	package cf;
		1762
		1763	=back
		1764
		1765	=head3 cf::object
		1766
		1767	=cut
		1768
		1769	package cf::object;
		1770
		1771	=over 4
		1772
		1773	=item $ob->inv_recursive
		1774
		1775	Returns the inventory of the object _and_ their inventories, recursively.
		1776
		1777	=cut
		1778
		1779	sub inv_recursive_;
		1780	sub inv_recursive_ {
		1781	map { $_, inv_recursive_ $_->inv } @_
		1782	}
		1783
		1784	sub inv_recursive {
		1785	inv_recursive_ inv $_[0]
		1786	}
		1787
		1788	package cf;
		1789
		1790	=back
		1791
		1792	=head3 cf::object::player
		1793
		1794	=over 4
		1795
798	=item $player->reply ($npc, $msg[, $flags])	1796	=item $player_object->reply ($npc, $msg[, $flags])
799		1797
800	Sends a message to the player, as if the npc C<$npc> replied. C<$npc>	1798	Sends a message to the player, as if the npc C<$npc> replied. C<$npc>
801	can be C<undef>. Does the right thing when the player is currently in a	1799	can be C<undef>. Does the right thing when the player is currently in a
802	dialogue with the given NPC character.	1800	dialogue with the given NPC character.
803		1801
804	=cut	1802	=cut
805		1803
806	# rough implementation of a future "reply" method that works	1804	# rough implementation of a future "reply" method that works
807	# with dialog boxes.	1805	# with dialog boxes.
		1806	#TODO: the first argument must go, split into a $npc->reply_to ( method
808	sub cf::object::player::reply($$$;$) {	1807	sub cf::object::player::reply($$$;$) {
809	my ($self, $npc, $msg, $flags) = @_;	1808	my ($self, $npc, $msg, $flags) = @_;
810		1809
811	$flags = cf::NDI_BROWN | cf::NDI_UNIQUE unless @_ >= 4;	1810	$flags = cf::NDI_BROWN | cf::NDI_UNIQUE unless @_ >= 4;
812		1811
…		…
816	$msg = $npc->name . " says: $msg" if $npc;	1815	$msg = $npc->name . " says: $msg" if $npc;
817	$self->message ($msg, $flags);	1816	$self->message ($msg, $flags);
818	}	1817	}
819	}	1818	}
820		1819
821	=item $player->ext_reply ($msgid, $msgtype, %msg)	1820	=item $player_object->may ("access")
822		1821
823	Sends an ext reply to the player.	1822	Returns wether the given player is authorized to access resource "access"
		1823	(e.g. "command_wizcast").
824		1824
825	=cut	1825	=cut
826		1826
827	sub cf::player::ext_reply($$$%) {	1827	sub cf::object::player::may {
		1828	my ($self, $access) = @_;
		1829
		1830	$self->flag (cf::FLAG_WIZ) ||
		1831	(ref $cf::CFG{"may_$access"}
		1832	? scalar grep $self->name eq $_, @{$cf::CFG{"may_$access"}}
		1833	: $cf::CFG{"may_$access"})
		1834	}
		1835
		1836	=item $player_object->enter_link
		1837
		1838	Freezes the player and moves him/her to a special map (C<{link}>).
		1839
		1840	The player should be reasonably safe there for short amounts of time. You
		1841	I<MUST> call C<leave_link> as soon as possible, though.
		1842
		1843	Will never block.
		1844
		1845	=item $player_object->leave_link ($map, $x, $y)
		1846
		1847	Moves the player out of the special C<{link}> map onto the specified
		1848	map. If the map is not valid (or omitted), the player will be moved back
		1849	to the location he/she was before the call to C<enter_link>, or, if that
		1850	fails, to the emergency map position.
		1851
		1852	Might block.
		1853
		1854	=cut
		1855
		1856	sub link_map {
		1857	unless ($LINK_MAP) {
		1858	$LINK_MAP = cf::map::find "{link}"
		1859	or cf::cleanup "FATAL: unable to provide {link} map, exiting.";
		1860	$LINK_MAP->load;
		1861	}
		1862
		1863	$LINK_MAP
		1864	}
		1865
		1866	sub cf::object::player::enter_link {
		1867	my ($self) = @_;
		1868
		1869	$self->deactivate_recursive;
		1870
		1871	return if UNIVERSAL::isa $self->map, "ext::map_link";
		1872
		1873	$self->{_link_pos} ||= [$self->map->{path}, $self->x, $self->y]
		1874	if $self->map;
		1875
		1876	$self->enter_map ($LINK_MAP || link_map, 10, 10);
		1877	}
		1878
		1879	sub cf::object::player::leave_link {
		1880	my ($self, $map, $x, $y) = @_;
		1881
		1882	my $link_pos = delete $self->{_link_pos};
		1883
		1884	unless ($map) {
		1885	# restore original map position
		1886	($map, $x, $y) = @{ $link_pos || [] };
		1887	$map = cf::map::find $map;
		1888
		1889	unless ($map) {
		1890	($map, $x, $y) = @$EMERGENCY_POSITION;
		1891	$map = cf::map::find $map
		1892	or die "FATAL: cannot load emergency map\n";
		1893	}
		1894	}
		1895
		1896	($x, $y) = (-1, -1)
		1897	unless (defined $x) && (defined $y);
		1898
		1899	# use -1 or undef as default coordinates, not 0, 0
		1900	($x, $y) = ($map->enter_x, $map->enter_y)
		1901	if $x <=0 && $y <= 0;
		1902
		1903	$map->load;
		1904	$map->load_diag;
		1905
		1906	return unless $self->contr->active;
		1907	$self->activate_recursive;
		1908
		1909	local $self->{_prev_pos} = $link_pos; # ugly hack for rent.ext
		1910	$self->enter_map ($map, $x, $y);
		1911	}
		1912
		1913	cf::player->attach (
		1914	on_logout => sub {
		1915	my ($pl) = @_;
		1916
		1917	# abort map switching before logout
		1918	if ($pl->ob->{_link_pos}) {
		1919	cf::sync_job {
		1920	$pl->ob->leave_link
		1921	};
		1922	}
		1923	},
		1924	on_login => sub {
		1925	my ($pl) = @_;
		1926
		1927	# try to abort aborted map switching on player login :)
		1928	# should happen only on crashes
		1929	if ($pl->ob->{_link_pos}) {
		1930	$pl->ob->enter_link;
		1931	(async {
		1932	$pl->ob->reply (undef,
		1933	"There was an internal problem at your last logout, "
		1934	. "the server will try to bring you to your intended destination in a second.",
		1935	cf::NDI_RED);
		1936	# we need this sleep as the login has a concurrent enter_exit running
		1937	# and this sleep increases chances of the player not ending up in scorn
		1938	Coro::Timer::sleep 1;
		1939	$pl->ob->leave_link;
		1940	})->prio (2);
		1941	}
		1942	},
		1943	);
		1944
		1945	=item $player_object->goto ($path, $x, $y)
		1946
		1947	=cut
		1948
		1949	sub cf::object::player::goto {
		1950	my ($self, $path, $x, $y) = @_;
		1951
		1952	$self->enter_link;
		1953
		1954	(async {
		1955	my $map = eval {
		1956	my $map = cf::map::find $path;
		1957	$map = $map->customise_for ($self) if $map;
		1958	$map
		1959	} or
		1960	$self->message ("The exit to '$path' is closed", cf::NDI_UNIQUE | cf::NDI_RED);
		1961
		1962	$self->leave_link ($map, $x, $y);
		1963	})->prio (1);
		1964	}
		1965
		1966	=item $player_object->enter_exit ($exit_object)
		1967
		1968	=cut
		1969
		1970	sub parse_random_map_params {
		1971	my ($spec) = @_;
		1972
		1973	my $rmp = { # defaults
		1974	xsize => (cf::rndm 15, 40),
		1975	ysize => (cf::rndm 15, 40),
		1976	symmetry => (cf::rndm 1, cf::SYMMETRY_XY),
		1977	#layout => string,
		1978	};
		1979
		1980	for (split /\n/, $spec) {
		1981	my ($k, $v) = split /\s+/, $_, 2;
		1982
		1983	$rmp->{lc $k} = $v if (length $k) && (length $v);
		1984	}
		1985
		1986	$rmp
		1987	}
		1988
		1989	sub prepare_random_map {
		1990	my ($exit) = @_;
		1991
		1992	my $guard = cf::lock_acquire "exit_prepare:$exit";
		1993
		1994	# all this does is basically replace the /! path by
		1995	# a new random map path (?random/...) with a seed
		1996	# that depends on the exit object
		1997
		1998	my $rmp = parse_random_map_params $exit->msg;
		1999
		2000	if ($exit->map) {
		2001	$rmp->{region} = $exit->region->name;
		2002	$rmp->{origin_map} = $exit->map->path;
		2003	$rmp->{origin_x} = $exit->x;
		2004	$rmp->{origin_y} = $exit->y;
		2005	}
		2006
		2007	$rmp->{random_seed} ||= $exit->random_seed;
		2008
		2009	my $data = cf::to_json $rmp;
		2010	my $md5 = Digest::MD5::md5_hex $data;
		2011	my $meta = "$RANDOMDIR/$md5.meta";
		2012
		2013	if (my $fh = aio_open "$meta~", O_WRONLY | O_CREAT, 0666) {
		2014	aio_write $fh, 0, (length $data), $data, 0;
		2015	undef $fh;
		2016	aio_rename "$meta~", $meta;
		2017
		2018	$exit->slaying ("?random/$md5");
		2019	$exit->msg (undef);
		2020	}
		2021	}
		2022
		2023	sub cf::object::player::enter_exit {
		2024	my ($self, $exit) = @_;
		2025
		2026	return unless $self->type == cf::PLAYER;
		2027
		2028	if ($exit->slaying eq "/!") {
		2029	#TODO: this should de-fi-ni-te-ly not be a sync-job
		2030	# the problem is that $exit might not survive long enough
		2031	# so it needs to be done right now, right here
		2032	cf::sync_job { prepare_random_map $exit };
		2033	}
		2034
		2035	my $slaying = cf::map::normalise $exit->slaying, $exit->map && $exit->map->path;
		2036	my $hp = $exit->stats->hp;
		2037	my $sp = $exit->stats->sp;
		2038
		2039	$self->enter_link;
		2040
		2041	(async {
		2042	$self->deactivate_recursive; # just to be sure
		2043	unless (eval {
		2044	$self->goto ($slaying, $hp, $sp);
		2045
		2046	1;
		2047	}) {
		2048	$self->message ("Something went wrong deep within the crossfire server. "
		2049	. "I'll try to bring you back to the map you were before. "
		2050	. "Please report this to the dungeon master!",
		2051	cf::NDI_UNIQUE | cf::NDI_RED);
		2052
		2053	warn "ERROR in enter_exit: $@";
		2054	$self->leave_link;
		2055	}
		2056	})->prio (1);
		2057	}
		2058
		2059	=head3 cf::client
		2060
		2061	=over 4
		2062
		2063	=item $client->send_drawinfo ($text, $flags)
		2064
		2065	Sends a drawinfo packet to the client. Circumvents output buffering so
		2066	should not be used under normal circumstances.
		2067
		2068	=cut
		2069
		2070	sub cf::client::send_drawinfo {
		2071	my ($self, $text, $flags) = @_;
		2072
		2073	utf8::encode $text;
		2074	$self->send_packet (sprintf "drawinfo %d %s", $flags || cf::NDI_BLACK, $text);
		2075	}
		2076
		2077	=item $client->ext_event ($type, %msg)
		2078
		2079	Sends an exti event to the client.
		2080
		2081	=cut
		2082
		2083	sub cf::client::ext_event($$%) {
828	my ($self, $id, %msg) = @_;	2084	my ($self, $type, %msg) = @_;
829		2085
830	$msg{msgid} = $id;	2086	$msg{msgtype} = "event_$type";
831
832	$self->send ("ext " . to_json \%msg);	2087	$self->send_packet ("ext " . cf::to_json \%msg);
833	}	2088	}
834		2089
835	#############################################################################	2090	=item $success = $client->query ($flags, "text", \&cb)
836	# map scripting support	2091
		2092	Queues a query to the client, calling the given callback with
		2093	the reply text on a reply. flags can be C<cf::CS_QUERY_YESNO>,
		2094	C<cf::CS_QUERY_SINGLECHAR> or C<cf::CS_QUERY_HIDEINPUT> or C<0>.
		2095
		2096	Queries can fail, so check the return code. Or don't, as queries will become
		2097	reliable at some point in the future.
		2098
		2099	=cut
		2100
		2101	sub cf::client::query {
		2102	my ($self, $flags, $text, $cb) = @_;
		2103
		2104	return unless $self->state == ST_PLAYING
		2105	|| $self->state == ST_SETUP
		2106	|| $self->state == ST_CUSTOM;
		2107
		2108	$self->state (ST_CUSTOM);
		2109
		2110	utf8::encode $text;
		2111	push @{ $self->{query_queue} }, [(sprintf "query %d %s", $flags, $text), $cb];
		2112
		2113	$self->send_packet ($self->{query_queue}[0][0])
		2114	if @{ $self->{query_queue} } == 1;
		2115	}
		2116
		2117	cf::client->attach (
		2118	on_reply => sub {
		2119	my ($ns, $msg) = @_;
		2120
		2121	# this weird shuffling is so that direct followup queries
		2122	# get handled first
		2123	my $queue = delete $ns->{query_queue}
		2124	or return; # be conservative, not sure how that can happen, but we saw a crash here
		2125
		2126	(shift @$queue)->[1]->($msg);
		2127	return unless $ns->valid; # temporary(?) workaround for callback destroying socket
		2128
		2129	push @{ $ns->{query_queue} }, @$queue;
		2130
		2131	if (@{ $ns->{query_queue} } == @$queue) {
		2132	if (@$queue) {
		2133	$ns->send_packet ($ns->{query_queue}[0][0]);
		2134	} else {
		2135	$ns->state (ST_PLAYING) if $ns->state == ST_CUSTOM;
		2136	}
		2137	}
		2138	},
		2139	);
		2140
		2141	=item $client->async (\&cb)
		2142
		2143	Create a new coroutine, running the specified callback. The coroutine will
		2144	be automatically cancelled when the client gets destroyed (e.g. on logout,
		2145	or loss of connection).
		2146
		2147	=cut
		2148
		2149	sub cf::client::async {
		2150	my ($self, $cb) = @_;
		2151
		2152	my $coro = &Coro::async ($cb);
		2153
		2154	$coro->on_destroy (sub {
		2155	delete $self->{_coro}{$coro+0};
		2156	});
		2157
		2158	$self->{_coro}{$coro+0} = $coro;
		2159
		2160	$coro
		2161	}
		2162
		2163	cf::client->attach (
		2164	on_destroy => sub {
		2165	my ($ns) = @_;
		2166
		2167	$_->cancel for values %{ (delete $ns->{_coro}) || {} };
		2168	},
		2169	);
		2170
		2171	=back
		2172
		2173
		2174	=head2 SAFE SCRIPTING
		2175
		2176	Functions that provide a safe environment to compile and execute
		2177	snippets of perl code without them endangering the safety of the server
		2178	itself. Looping constructs, I/O operators and other built-in functionality
		2179	is not available in the safe scripting environment, and the number of
		2180	functions and methods that can be called is greatly reduced.
		2181
		2182	=cut
837		2183
838	our $safe = new Safe "safe";	2184	our $safe = new Safe "safe";
839	our $safe_hole = new Safe::Hole;	2185	our $safe_hole = new Safe::Hole;
840		2186
841	$SIG{FPE} = 'IGNORE';	2187	$SIG{FPE} = 'IGNORE';
842		2188
843	$safe->permit_only (Opcode::opset qw(:base_core :base_mem :base_orig :base_math sort time));	2189	$safe->permit_only (Opcode::opset qw(:base_core :base_mem :base_orig :base_math sort time));
844		2190
845	# here we export the classes and methods available to script code	2191	# here we export the classes and methods available to script code
846		2192
		2193	=pod
		2194
		2195	The following functions and methods are available within a safe environment:
		2196
		2197	cf::object contr pay_amount pay_player map
		2198	cf::object::player player
		2199	cf::player peaceful
		2200	cf::map trigger
		2201
		2202	=cut
		2203
847	for (	2204	for (
848	["cf::object" => qw(contr pay_amount pay_player)],	2205	["cf::object" => qw(contr pay_amount pay_player map)],
849	["cf::object::player" => qw(player)],	2206	["cf::object::player" => qw(player)],
850	["cf::player" => qw(peaceful)],	2207	["cf::player" => qw(peaceful)],
		2208	["cf::map" => qw(trigger)],
851	) {	2209	) {
852	no strict 'refs';	2210	no strict 'refs';
853	my ($pkg, @funs) = @$_;	2211	my ($pkg, @funs) = @$_;
854	*{"safe::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})	2212	*{"safe::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})
855	for @funs;	2213	for @funs;
856	}	2214	}
		2215
		2216	=over 4
		2217
		2218	=item @retval = safe_eval $code, [var => value, ...]
		2219
		2220	Compiled and executes the given perl code snippet. additional var/value
		2221	pairs result in temporary local (my) scalar variables of the given name
		2222	that are available in the code snippet. Example:
		2223
		2224	my $five = safe_eval '$first + $second', first => 1, second => 4;
		2225
		2226	=cut
857		2227
858	sub safe_eval($;@) {	2228	sub safe_eval($;@) {
859	my ($code, %vars) = @_;	2229	my ($code, %vars) = @_;
860		2230
861	my $qcode = $code;	2231	my $qcode = $code;
…		…
884	}	2254	}
885		2255
886	wantarray ? @res : $res[0]	2256	wantarray ? @res : $res[0]
887	}	2257	}
888		2258
		2259	=item cf::register_script_function $function => $cb
		2260
		2261	Register a function that can be called from within map/npc scripts. The
		2262	function should be reasonably secure and should be put into a package name
		2263	like the extension.
		2264
		2265	Example: register a function that gets called whenever a map script calls
		2266	C<rent::overview>, as used by the C<rent> extension.
		2267
		2268	cf::register_script_function "rent::overview" => sub {
		2269	...
		2270	};
		2271
		2272	=cut
		2273
889	sub register_script_function {	2274	sub register_script_function {
890	my ($fun, $cb) = @_;	2275	my ($fun, $cb) = @_;
891		2276
892	no strict 'refs';	2277	no strict 'refs';
893	*{"safe::$fun"} = $safe_hole->wrap ($cb);	2278	*{"safe::$fun"} = $safe_hole->wrap ($cb);
894	}	2279	}
895		2280
		2281	=back
		2282
		2283	=cut
		2284
896	#############################################################################	2285	#############################################################################
897	# the server's main()	2286
		2287	=head2 EXTENSION DATABASE SUPPORT
		2288
		2289	Crossfire maintains a very simple database for extension use. It can
		2290	currently store binary data only (use Compress::LZF::sfreeze_cr/sthaw to
		2291	convert to/from binary).
		2292
		2293	The parameter C<$family> should best start with the name of the extension
		2294	using it, it should be unique.
		2295
		2296	=over 4
		2297
		2298	=item $value = cf::db_get $family => $key
		2299
		2300	Returns a single value from the database.
		2301
		2302	=item cf::db_put $family => $key => $value
		2303
		2304	Stores the given C<$value> in the family.
		2305
		2306	=cut
		2307
		2308	our $DB;
		2309
		2310	sub db_init {
		2311	unless ($DB) {
		2312	$DB = BDB::db_create $DB_ENV;
		2313
		2314	cf::sync_job {
		2315	eval {
		2316	$DB->set_flags (BDB::CHKSUM);
		2317
		2318	BDB::db_open $DB, undef, "db", undef, BDB::BTREE,
		2319	BDB::CREATE | BDB::AUTO_COMMIT, 0666;
		2320	cf::cleanup "db_open(db): $!" if $!;
		2321	};
		2322	cf::cleanup "db_open(db): $@" if $@;
		2323	};
		2324	}
		2325	}
		2326
		2327	sub db_get($$) {
		2328	my $key = "$_[0]/$_[1]";
		2329
		2330	cf::sync_job {
		2331	BDB::db_get $DB, undef, $key, my $data;
		2332
		2333	$! ? ()
		2334	: $data
		2335	}
		2336	}
		2337
		2338	sub db_put($$$) {
		2339	BDB::dbreq_pri 4;
		2340	BDB::db_put $DB, undef, "$_[0]/$_[1]", $_[2], 0, sub { };
		2341	}
		2342
		2343	=item cf::cache $id => [$paths...], $processversion => $process
		2344
		2345	Generic caching function that returns the value of the resource $id,
		2346	caching and regenerating as required.
		2347
		2348	This function can block.
		2349
		2350	=cut
		2351
		2352	sub cache {
		2353	my ($id, $src, $processversion, $process) = @_;
		2354
		2355	my $meta =
		2356	join "\x00",
		2357	$processversion,
		2358	map {
		2359	aio_stat $_
		2360	and Carp::croak "$_: $!";
		2361
		2362	($_, (stat _)[7,9])
		2363	} @$src;
		2364
		2365	my $dbmeta = db_get cache => "$id/meta";
		2366	if ($dbmeta ne $meta) {
		2367	# changed, we may need to process
		2368
		2369	my @data;
		2370	my $md5;
		2371
		2372	for (0 .. $#$src) {
		2373	0 <= aio_load $src->[$_], $data[$_]
		2374	or Carp::croak "$src->[$_]: $!";
		2375	}
		2376
		2377	# if processing is expensive, check
		2378	# checksum first
		2379	if (1) {
		2380	$md5 =
		2381	join "\x00",
		2382	$processversion,
		2383	map {
		2384	Coro::cede;
		2385	($src->[$_], Digest::MD5::md5_hex $data[$_])
		2386	} 0.. $#$src;
		2387
		2388
		2389	my $dbmd5 = db_get cache => "$id/md5";
		2390	if ($dbmd5 eq $md5) {
		2391	db_put cache => "$id/meta", $meta;
		2392
		2393	return db_get cache => "$id/data";
		2394	}
		2395	}
		2396
		2397	my $t1 = Time::HiRes::time;
		2398	my $data = $process->(\@data);
		2399	my $t2 = Time::HiRes::time;
		2400
		2401	warn "cache: '$id' processed in ", $t2 - $t1, "s\n";
		2402
		2403	db_put cache => "$id/data", $data;
		2404	db_put cache => "$id/md5" , $md5;
		2405	db_put cache => "$id/meta", $meta;
		2406
		2407	return $data;
		2408	}
		2409
		2410	db_get cache => "$id/data"
		2411	}
		2412
		2413	=item fork_call { }, $args
		2414
		2415	Executes the given code block with the given arguments in a seperate
		2416	process, returning the results. Everything must be serialisable with
		2417	Coro::Storable. May, of course, block. Note that the executed sub may
		2418	never block itself or use any form of Event handling.
		2419
		2420	=cut
		2421
		2422	sub fork_call(&@) {
		2423	my ($cb, @args) = @_;
		2424
		2425	# socketpair my $fh1, my $fh2, Socket::AF_UNIX, Socket::SOCK_STREAM, Socket::PF_UNSPEC
		2426	# or die "socketpair: $!";
		2427	pipe my $fh1, my $fh2
		2428	or die "pipe: $!";
		2429
		2430	if (my $pid = fork) {
		2431	close $fh2;
		2432
		2433	my $res = (Coro::Handle::unblock $fh1)->readline (undef);
		2434	$res = Coro::Storable::thaw $res;
		2435
		2436	waitpid $pid, 0; # should not block anymore, we expect the child to simply behave
		2437
		2438	die $$res unless "ARRAY" eq ref $res;
		2439
		2440	return wantarray ? @$res : $res->[-1];
		2441	} else {
		2442	local $SIG{__WARN__};
		2443	eval {
		2444	local $SIG{__DIE__};
		2445	close $fh1;
		2446
		2447	my @res = eval { $cb->(@args) };
		2448	syswrite $fh2, Coro::Storable::freeze +($@ ? \"$@" : \@res);
		2449	};
		2450
		2451	warn $@ if $@;
		2452	_exit 0;
		2453	}
		2454	}
		2455
		2456
		2457
		2458	#############################################################################
		2459	# the server's init and main functions
		2460
		2461	sub load_facedata($) {
		2462	my ($path) = @_;
		2463
		2464	warn "loading facedata from $path\n";
		2465
		2466	my $facedata;
		2467	0 < aio_load $path, $facedata
		2468	or die "$path: $!";
		2469
		2470	$facedata = Coro::Storable::thaw $facedata;
		2471
		2472	$facedata->{version} == 2
		2473	or cf::cleanup "$path: version mismatch, cannot proceed.";
		2474
		2475	{
		2476	my $faces = $facedata->{faceinfo};
		2477
		2478	while (my ($face, $info) = each %$faces) {
		2479	my $idx = (cf::face::find $face) || cf::face::alloc $face;
		2480	cf::face::set $idx, $info->{visibility}, $info->{magicmap};
		2481	cf::face::set_data $idx, 0, $info->{data32}, $info->{chksum32};
		2482	cf::face::set_data $idx, 1, $info->{data64}, $info->{chksum64};
		2483	Coro::cede;
		2484	}
		2485
		2486	while (my ($face, $info) = each %$faces) {
		2487	next unless $info->{smooth};
		2488	my $idx = cf::face::find $face
		2489	or next;
		2490	if (my $smooth = cf::face::find $info->{smooth}) {
		2491	cf::face::set_smooth $idx, $smooth, $info->{smoothlevel};
		2492	} else {
		2493	warn "smooth face '$info->{smooth}' not found for face '$face'";
		2494	}
		2495	Coro::cede;
		2496	}
		2497	}
		2498
		2499	{
		2500	my $anims = $facedata->{animinfo};
		2501
		2502	while (my ($anim, $info) = each %$anims) {
		2503	cf::anim::set $anim, $info->{frames}, $info->{facings};
		2504	Coro::cede;
		2505	}
		2506
		2507	cf::anim::invalidate_all; # d'oh
		2508	}
		2509
		2510	1
		2511	}
		2512
		2513	sub reload_regions {
		2514	load_resource_file "$MAPDIR/regions"
		2515	or die "unable to load regions file\n";
		2516	}
		2517
		2518	sub reload_facedata {
		2519	load_facedata "$DATADIR/facedata"
		2520	or die "unable to load facedata\n";
		2521	}
		2522
		2523	sub reload_archetypes {
		2524	load_resource_file "$DATADIR/archetypes"
		2525	or die "unable to load archetypes\n";
		2526	}
		2527
		2528	sub reload_treasures {
		2529	load_resource_file "$DATADIR/treasures"
		2530	or die "unable to load treasurelists\n";
		2531	}
		2532
		2533	sub reload_resources {
		2534	warn "reloading resource files...\n";
		2535
		2536	reload_regions;
		2537	reload_facedata;
		2538	reload_archetypes;
		2539	reload_treasures;
		2540
		2541	warn "finished reloading resource files\n";
		2542	}
		2543
		2544	sub init {
		2545	reload_resources;
		2546	}
		2547
		2548	sub cfg_load {
		2549	open my $fh, "<:utf8", "$CONFDIR/config"
		2550	or return;
		2551
		2552	local $/;
		2553	*CFG = YAML::Syck::Load <$fh>;
		2554
		2555	$EMERGENCY_POSITION = $CFG{emergency_position} || ["/world/world_105_115", 5, 37];
		2556
		2557	$cf::map::MAX_RESET = $CFG{map_max_reset} if exists $CFG{map_max_reset};
		2558	$cf::map::DEFAULT_RESET = $CFG{map_default_reset} if exists $CFG{map_default_reset};
		2559
		2560	if (exists $CFG{mlockall}) {
		2561	eval {
		2562	$CFG{mlockall} ? eval "mlockall()" : eval "munlockall()"
		2563	and die "WARNING: m(un)lockall failed: $!\n";
		2564	};
		2565	warn $@ if $@;
		2566	}
		2567	}
898		2568
899	sub main {	2569	sub main {
		2570	# we must not ever block the main coroutine
		2571	local $Coro::idle = sub {
		2572	Carp::cluck "FATAL: Coro::idle was called, major BUG, use cf::sync_job!\n";#d#
		2573	(async {
		2574	Event::one_event;
		2575	})->prio (Coro::PRIO_MAX);
		2576	};
		2577
		2578	cfg_load;
		2579	db_init;
900	load_extensions;	2580	load_extensions;
		2581
		2582	$TICK_WATCHER->start;
901	Event::loop;	2583	Event::loop;
902	}	2584	}
903		2585
904	#############################################################################	2586	#############################################################################
905	# initialisation	2587	# initialisation and cleanup
906		2588
907	register "<global>", __PACKAGE__;	2589	# install some emergency cleanup handlers
		2590	BEGIN {
		2591	for my $signal (qw(INT HUP TERM)) {
		2592	Event->signal (
		2593	reentrant => 0,
		2594	data => WF_AUTOCANCEL,
		2595	signal => $signal,
		2596	prio => 0,
		2597	cb => sub {
		2598	cf::cleanup "SIG$signal";
		2599	},
		2600	);
		2601	}
		2602	}
		2603
		2604	sub emergency_save() {
		2605	my $freeze_guard = cf::freeze_mainloop;
		2606
		2607	warn "enter emergency perl save\n";
		2608
		2609	cf::sync_job {
		2610	# use a peculiar iteration method to avoid tripping on perl
		2611	# refcount bugs in for. also avoids problems with players
		2612	# and maps saved/destroyed asynchronously.
		2613	warn "begin emergency player save\n";
		2614	for my $login (keys %cf::PLAYER) {
		2615	my $pl = $cf::PLAYER{$login} or next;
		2616	$pl->valid or next;
		2617	$pl->save;
		2618	}
		2619	warn "end emergency player save\n";
		2620
		2621	warn "begin emergency map save\n";
		2622	for my $path (keys %cf::MAP) {
		2623	my $map = $cf::MAP{$path} or next;
		2624	$map->valid or next;
		2625	$map->save;
		2626	}
		2627	warn "end emergency map save\n";
		2628
		2629	warn "begin emergency database checkpoint\n";
		2630	BDB::db_env_txn_checkpoint $DB_ENV;
		2631	warn "end emergency database checkpoint\n";
		2632	};
		2633
		2634	warn "leave emergency perl save\n";
		2635	}
		2636
		2637	sub post_cleanup {
		2638	my ($make_core) = @_;
		2639
		2640	warn Carp::longmess "post_cleanup backtrace"
		2641	if $make_core;
		2642	}
		2643
		2644	sub do_reload_perl() {
		2645	# can/must only be called in main
		2646	if ($Coro::current != $Coro::main) {
		2647	warn "can only reload from main coroutine";
		2648	return;
		2649	}
		2650
		2651	warn "reloading...";
		2652
		2653	warn "entering sync_job";
		2654
		2655	cf::sync_job {
		2656	cf::write_runtime; # external watchdog should not bark
		2657	cf::emergency_save;
		2658	cf::write_runtime; # external watchdog should not bark
		2659
		2660	warn "syncing database to disk";
		2661	BDB::db_env_txn_checkpoint $DB_ENV;
		2662
		2663	# if anything goes wrong in here, we should simply crash as we already saved
		2664
		2665	warn "cancelling all WF_AUTOCANCEL watchers";
		2666	for (Event::all_watchers) {
		2667	$_->cancel if $_->data & WF_AUTOCANCEL;
		2668	}
		2669
		2670	warn "flushing outstanding aio requests";
		2671	for (;;) {
		2672	BDB::flush;
		2673	IO::AIO::flush;
		2674	Coro::cede;
		2675	last unless IO::AIO::nreqs || BDB::nreqs;
		2676	warn "iterate...";
		2677	}
		2678
		2679	++$RELOAD;
		2680
		2681	warn "cancelling all extension coros";
		2682	$_->cancel for values %EXT_CORO;
		2683	%EXT_CORO = ();
		2684
		2685	warn "removing commands";
		2686	%COMMAND = ();
		2687
		2688	warn "removing ext commands";
		2689	%EXTCMD = ();
		2690
		2691	warn "unloading/nuking all extensions";
		2692	for my $pkg (@EXTS) {
		2693	warn "... unloading $pkg";
		2694
		2695	if (my $cb = $pkg->can ("unload")) {
		2696	eval {
		2697	$cb->($pkg);
		2698	1
		2699	} or warn "$pkg unloaded, but with errors: $@";
		2700	}
		2701
		2702	warn "... nuking $pkg";
		2703	Symbol::delete_package $pkg;
		2704	}
		2705
		2706	warn "unloading all perl modules loaded from $LIBDIR";
		2707	while (my ($k, $v) = each %INC) {
		2708	next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;
		2709
		2710	warn "... unloading $k";
		2711	delete $INC{$k};
		2712
		2713	$k =~ s/\.pm$//;
		2714	$k =~ s/\//::/g;
		2715
		2716	if (my $cb = $k->can ("unload_module")) {
		2717	$cb->();
		2718	}
		2719
		2720	Symbol::delete_package $k;
		2721	}
		2722
		2723	warn "getting rid of safe::, as good as possible";
		2724	Symbol::delete_package "safe::$_"
		2725	for qw(cf::attachable cf::object cf::object::player cf::client cf::player cf::map cf::party cf::region);
		2726
		2727	warn "unloading cf.pm \"a bit\"";
		2728	delete $INC{"cf.pm"};
		2729	delete $INC{"cf/pod.pm"};
		2730
		2731	# don't, removes xs symbols, too,
		2732	# and global variables created in xs
		2733	#Symbol::delete_package __PACKAGE__;
		2734
		2735	warn "unload completed, starting to reload now";
		2736
		2737	warn "reloading cf.pm";
		2738	require cf;
		2739	cf::_connect_to_perl; # nominally unnecessary, but cannot hurt
		2740
		2741	warn "loading config and database again";
		2742	cf::cfg_load;
		2743
		2744	warn "loading extensions";
		2745	cf::load_extensions;
		2746
		2747	warn "reattaching attachments to objects/players";
		2748	_global_reattach; # objects, sockets
		2749	warn "reattaching attachments to maps";
		2750	reattach $_ for values %MAP;
		2751	warn "reattaching attachments to players";
		2752	reattach $_ for values %PLAYER;
		2753
		2754	warn "leaving sync_job";
		2755
		2756	1
		2757	} or do {
		2758	warn $@;
		2759	warn "error while reloading, exiting.";
		2760	exit 1;
		2761	};
		2762
		2763	warn "reloaded";
		2764	};
		2765
		2766	our $RELOAD_WATCHER; # used only during reload
		2767
		2768	sub reload_perl() {
		2769	# doing reload synchronously and two reloads happen back-to-back,
		2770	# coro crashes during coro_state_free->destroy here.
		2771
		2772	$RELOAD_WATCHER ||= Event->timer (
		2773	reentrant => 0,
		2774	after => 0,
		2775	data => WF_AUTOCANCEL,
		2776	cb => sub {
		2777	do_reload_perl;
		2778	undef $RELOAD_WATCHER;
		2779	},
		2780	);
		2781	}
		2782
		2783	register_command "reload" => sub {
		2784	my ($who, $arg) = @_;
		2785
		2786	if ($who->flag (FLAG_WIZ)) {
		2787	$who->message ("reloading server.");
		2788	async { reload_perl };
		2789	}
		2790	};
908		2791
909	unshift @INC, $LIBDIR;	2792	unshift @INC, $LIBDIR;
910		2793
		2794	my $bug_warning = 0;
		2795
		2796	our @WAIT_FOR_TICK;
		2797	our @WAIT_FOR_TICK_BEGIN;
		2798
		2799	sub wait_for_tick {
		2800	return unless $TICK_WATCHER->is_active;
		2801	return if $Coro::current == $Coro::main;
		2802
		2803	my $signal = new Coro::Signal;
		2804	push @WAIT_FOR_TICK, $signal;
		2805	$signal->wait;
		2806	}
		2807
		2808	sub wait_for_tick_begin {
		2809	return unless $TICK_WATCHER->is_active;
		2810	return if $Coro::current == $Coro::main;
		2811
		2812	my $signal = new Coro::Signal;
		2813	push @WAIT_FOR_TICK_BEGIN, $signal;
		2814	$signal->wait;
		2815	}
		2816
911	$TICK_WATCHER = Event->timer (	2817	$TICK_WATCHER = Event->timer (
		2818	reentrant => 0,
		2819	parked => 1,
912	prio => 1,	2820	prio => 0,
913	at => $NEXT_TICK || 1,	2821	at => $NEXT_TICK || $TICK,
		2822	data => WF_AUTOCANCEL,
914	cb => sub {	2823	cb => sub {
		2824	if ($Coro::current != $Coro::main) {
		2825	Carp::cluck "major BUG: server tick called outside of main coro, skipping it"
		2826	unless ++$bug_warning > 10;
		2827	return;
		2828	}
		2829
		2830	$NOW = Event::time;
		2831
915	cf::server_tick; # one server iteration	2832	cf::server_tick; # one server iteration
916		2833
917	my $NOW = Event::time;	2834	$RUNTIME += $TICK;
918	$NEXT_TICK += $TICK;	2835	$NEXT_TICK += $TICK;
919		2836
		2837	if ($NOW >= $NEXT_RUNTIME_WRITE) {
		2838	$NEXT_RUNTIME_WRITE = $NOW + 10;
		2839	Coro::async_pool {
		2840	write_runtime
		2841	or warn "ERROR: unable to write runtime file: $!";
		2842	};
		2843	}
		2844
		2845	# my $AFTER = Event::time;
		2846	# warn $AFTER - $NOW;#d#
		2847
920	# if we are delayed by four ticks, skip them all	2848	# if we are delayed by four ticks or more, skip them all
921	$NEXT_TICK = $NOW if $NOW >= $NEXT_TICK + $TICK * 4;	2849	$NEXT_TICK = Event::time if Event::time >= $NEXT_TICK + $TICK * 4;
922		2850
923	$TICK_WATCHER->at ($NEXT_TICK);	2851	$TICK_WATCHER->at ($NEXT_TICK);
924	$TICK_WATCHER->start;	2852	$TICK_WATCHER->start;
		2853
		2854	if (my $sig = shift @WAIT_FOR_TICK_BEGIN) {
		2855	$sig->send;
		2856	}
		2857	while (my $sig = shift @WAIT_FOR_TICK) {
		2858	$sig->send;
		2859	}
		2860
		2861	_post_tick;
925	},	2862	},
926	);	2863	);
927		2864
928	_reload_2;	2865	{
		2866	BDB::max_poll_time $TICK * 0.1;
		2867	$BDB_POLL_WATCHER = Event->io (
		2868	reentrant => 0,
		2869	fd => BDB::poll_fileno,
		2870	poll => 'r',
		2871	prio => 0,
		2872	data => WF_AUTOCANCEL,
		2873	cb => \&BDB::poll_cb,
		2874	);
		2875	BDB::min_parallel 8;
		2876
		2877	BDB::set_sync_prepare {
		2878	my $status;
		2879	my $current = $Coro::current;
		2880	(
		2881	sub {
		2882	$status = $!;
		2883	$current->ready; undef $current;
		2884	},
		2885	sub {
		2886	Coro::schedule while defined $current;
		2887	$! = $status;
		2888	},
		2889	)
		2890	};
		2891
		2892	unless ($DB_ENV) {
		2893	$DB_ENV = BDB::db_env_create;
		2894
		2895	cf::sync_job {
		2896	eval {
		2897	BDB::db_env_open
		2898	$DB_ENV,
		2899	$BDBDIR,
		2900	BDB::INIT_LOCK | BDB::INIT_LOG | BDB::INIT_MPOOL | BDB::INIT_TXN
		2901	| BDB::RECOVER | BDB::REGISTER | BDB::USE_ENVIRON | BDB::CREATE,
		2902	0666;
		2903
		2904	cf::cleanup "db_env_open($BDBDIR): $!" if $!;
		2905
		2906	$DB_ENV->set_flags (BDB::AUTO_COMMIT | BDB::REGION_INIT | BDB::TXN_NOSYNC, 1);
		2907	$DB_ENV->set_lk_detect;
		2908	};
		2909
		2910	cf::cleanup "db_env_open(db): $@" if $@;
		2911	};
		2912	}
		2913	}
		2914
		2915	{
		2916	IO::AIO::min_parallel 8;
		2917
		2918	undef $Coro::AIO::WATCHER;
		2919	IO::AIO::max_poll_time $TICK * 0.1;
		2920	$AIO_POLL_WATCHER = Event->io (
		2921	reentrant => 0,
		2922	data => WF_AUTOCANCEL,
		2923	fd => IO::AIO::poll_fileno,
		2924	poll => 'r',
		2925	prio => 6,
		2926	cb => \&IO::AIO::poll_cb,
		2927	);
		2928	}
		2929
		2930	# load additional modules
		2931	use cf::pod;
		2932
		2933	END { cf::emergency_save }
929		2934
930	1	2935	1
931		2936

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