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Comparing deliantra/server/lib/cf.pm (file contents):
Revision 1.44 by root, Sat Aug 26 08:44:06 2006 UTC vs.
Revision 1.105 by root, Sun Dec 31 17:17:23 2006 UTC

1	package cf;	1	package cf;
		2
		3	use utf8;
		4	use strict;
2		5
3	use Symbol;	6	use Symbol;
4	use List::Util;	7	use List::Util;
5	use Storable;	8	use Storable;
6	use Opcode;	9	use Opcode;
7	use Safe;	10	use Safe;
8	use Safe::Hole;	11	use Safe::Hole;
9		12
		13	use Coro 3.3;
		14	use Coro::Event;
		15	use Coro::Timer;
		16	use Coro::Signal;
		17	use Coro::Semaphore;
		18	use Coro::AIO;
		19
		20	use Fcntl;
		21	use IO::AIO 2.31 ();
		22	use YAML::Syck ();
10	use Time::HiRes;	23	use Time::HiRes;
11	use Event;	24
12	$Event::Eval = 1; # no idea why this is required, but it is	25	use Event; $Event::Eval = 1; # no idea why this is required, but it is
13		26
14	use strict;	27	# work around bug in YAML::Syck - bad news for perl6, will it be as broken wrt. unicode?
		28	$YAML::Syck::ImplicitUnicode = 1;
15		29
		30	$Coro::main->prio (2); # run main coroutine ("the server") with very high priority
		31
		32	sub WF_AUTOCANCEL () { 1 } # automatically cancel this watcher on reload
		33
16	our %COMMAND = ();	34	our %COMMAND = ();
		35	our %COMMAND_TIME = ();
		36	our %EXTCMD = ();
		37
17	our @EVENT;	38	our @EVENT;
18	our @PLUGIN_EVENT;	39	our $LIBDIR = datadir . "/ext";
19	our %PROP_TYPE;
20	our %PROP_IDX;
21	our $LIBDIR = maps_directory "perl";
22		40
23	our $TICK = MAX_TIME * 1e-6;	41	our $TICK = MAX_TIME * 1e-6;
24	our $TICK_WATCHER;	42	our $TICK_WATCHER;
25	our $NEXT_TICK;	43	our $NEXT_TICK;
		44	our $NOW;
		45
		46	our %CFG;
		47
		48	our $UPTIME; $UPTIME ||= time;
		49	our $RUNTIME;
		50
		51	our %MAP; # all maps
		52	our $LINK_MAP; # the special {link} map
		53	our $FREEZE;
		54
		55	binmode STDOUT;
		56	binmode STDERR;
		57
		58	# read virtual server time, if available
		59	unless ($RUNTIME || !-e cf::localdir . "/runtime") {
		60	open my $fh, "<", cf::localdir . "/runtime"
		61	or die "unable to read runtime file: $!";
		62	$RUNTIME = <$fh> + 0.;
		63	}
		64
		65	mkdir cf::localdir;
		66	mkdir cf::localdir . "/" . cf::playerdir;
		67	mkdir cf::localdir . "/" . cf::tmpdir;
		68	mkdir cf::localdir . "/" . cf::uniquedir;
		69
		70	our %EXT_CORO;
		71
		72	#############################################################################
		73
		74	=head2 GLOBAL VARIABLES
		75
		76	=over 4
		77
		78	=item $cf::UPTIME
		79
		80	The timestamp of the server start (so not actually an uptime).
		81
		82	=item $cf::RUNTIME
		83
		84	The time this server has run, starts at 0 and is increased by $cf::TICK on
		85	every server tick.
		86
		87	=item $cf::LIBDIR
		88
		89	The perl library directory, where extensions and cf-specific modules can
		90	be found. It will be added to C<@INC> automatically.
		91
		92	=item $cf::NOW
		93
		94	The time of the last (current) server tick.
		95
		96	=item $cf::TICK
		97
		98	The interval between server ticks, in seconds.
		99
		100	=item %cf::CFG
		101
		102	Configuration for the server, loaded from C</etc/crossfire/config>, or
		103	from wherever your confdir points to.
		104
		105	=back
		106
		107	=cut
26		108
27	BEGIN {	109	BEGIN {
28	@PLUGIN_EVENT = map lc, @PLUGIN_EVENT;
29
30	*CORE::GLOBAL::warn = sub {	110	*CORE::GLOBAL::warn = sub {
31	my $msg = join "", @_;	111	my $msg = join "", @_;
		112	utf8::encode $msg;
		113
32	$msg .= "\n"	114	$msg .= "\n"
33	unless $msg =~ /\n$/;	115	unless $msg =~ /\n$/;
34		116
35	print STDERR "cfperl: $msg";
36	LOG llevError, "cfperl: $msg";	117	LOG llevError, "cfperl: $msg";
37	};	118	};
38	}	119	}
39		120
40	my %ignore_set = (MAP_PROP_PATH => 1); # I hate the plug-in api. Deeply!	121	@safe::cf::global::ISA = @cf::global::ISA = 'cf::attachable';
41		122	@safe::cf::object::ISA = @cf::object::ISA = 'cf::attachable';
42	# generate property mutators	123	@safe::cf::player::ISA = @cf::player::ISA = 'cf::attachable';
43	sub prop_gen {	124	@safe::cf::client::ISA = @cf::client::ISA = 'cf::attachable';
44	my ($prefix, $class) = @_;	125	@safe::cf::map::ISA = @cf::map::ISA = 'cf::attachable';
45
46	no strict 'refs';
47
48	for my $prop (keys %PROP_TYPE) {
49	$prop =~ /^\Q$prefix\E_(.*$)/ or next;
50	my $sub = lc $1;
51
52	my $type = $PROP_TYPE{$prop};
53	my $idx = $PROP_IDX {$prop};
54
55	*{"$class\::get_$sub"} = *{"$class\::$sub"} = sub {
56	$_[0]->get_property ($type, $idx)
57	};
58
59	*{"$class\::set_$sub"} = sub {
60	$_[0]->set_property ($type, $idx, $_[1]);
61	} unless $ignore_set{$prop};
62	}
63	}
64
65	# auto-generate most of the API
66
67	prop_gen OBJECT_PROP => "cf::object";
68	# CFAPI_OBJECT_ANIMATION?
69	prop_gen PLAYER_PROP => "cf::object::player";
70
71	prop_gen MAP_PROP => "cf::map";
72	prop_gen ARCH_PROP => "cf::arch";
73
74	# guessed hierarchies
75
76	@safe::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object';	126	@safe::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object';
77	@safe::cf::object::map::ISA = @cf::object::map::ISA = 'cf::object';
78		127
79	# we bless all objects into (empty) derived classes to force a method lookup	128	# we bless all objects into (empty) derived classes to force a method lookup
80	# within the Safe compartment.	129	# within the Safe compartment.
81	for my $pkg (qw(cf::object cf::object::map cf::object::player cf::player cf::map cf::party cf::region cf::arch)) {	130	for my $pkg (qw(
		131	cf::global cf::attachable
		132	cf::object cf::object::player
		133	cf::client cf::player
		134	cf::arch cf::living
		135	cf::map cf::party cf::region
		136	)) {
82	no strict 'refs';	137	no strict 'refs';
83	@{"safe::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;	138	@{"safe::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;
84	}	139	}
85		140
86	$Event::DIED = sub {	141	$Event::DIED = sub {
…		…
88	};	143	};
89		144
90	my %ext_pkg;	145	my %ext_pkg;
91	my @exts;	146	my @exts;
92	my @hook;	147	my @hook;
93	my %command;	148
94	my %extcmd;	149	=head2 UTILITY FUNCTIONS
		150
		151	=over 4
		152
		153	=cut
		154
		155	use JSON::Syck (); # TODO# replace by JSON::PC once working
		156
		157	=item $ref = cf::from_json $json
		158
		159	Converts a JSON string into the corresponding perl data structure.
		160
		161	=cut
		162
		163	sub from_json($) {
		164	$JSON::Syck::ImplicitUnicode = 1; # work around JSON::Syck bugs
		165	JSON::Syck::Load $_[0]
		166	}
		167
		168	=item $json = cf::to_json $ref
		169
		170	Converts a perl data structure into its JSON representation.
		171
		172	=cut
		173
		174	sub to_json($) {
		175	$JSON::Syck::ImplicitUnicode = 0; # work around JSON::Syck bugs
		176	JSON::Syck::Dump $_[0]
		177	}
		178
		179	# main coro must never ever "block" except in Event
		180	# sync_job ensures this by running the job in a coroutine
		181	# and waiting in Event while the server is otherwise frozen
		182	sub sync_job(&) {
		183	my ($job) = @_;
		184
		185	my $busy = 1;
		186	my @res;
		187
		188	local $FREEZE = 1;
		189
		190	my $coro = Coro::async {
		191	@res = eval { $job->() };
		192	warn $@ if $@;
		193	undef $busy;
		194	};
		195
		196	if ($Coro::current == $Coro::main) {
		197	$coro->prio (Coro::PRIO_MAX);
		198	while ($busy) {
		199	Coro::cede_notself;
		200	Event::one_event unless Coro::nready;
		201	}
		202	} else {
		203	$coro->join;
		204	}
		205
		206	wantarray ? @res : $res[0]
		207	}
		208
		209	=item $coro = cf::coro { BLOCK }
		210
		211	Creates and returns a new coro. This coro is automcatially being canceled
		212	when the extension calling this is being unloaded.
		213
		214	=cut
		215
		216	sub coro(&) {
		217	my $cb = shift;
		218
		219	my $coro; $coro = async {
		220	eval {
		221	$cb->();
		222	};
		223	warn $@ if $@;
		224	};
		225
		226	$coro->on_destroy (sub {
		227	delete $EXT_CORO{$coro+0};
		228	});
		229	$EXT_CORO{$coro+0} = $coro;
		230
		231	$coro
		232	}
		233
		234	=back
		235
		236	=cut
95		237
96	#############################################################################	238	#############################################################################
97	# object support
98		239
99	sub reattach {	240	=head2 ATTACHABLE OBJECTS
100	warn "reattach<@_>\n";
101	}
102		241
103	sub instantiate {	242	Many objects in crossfire are so-called attachable objects. That means you can
104	warn "instantiate<@_>\n";	243	attach callbacks/event handlers (a collection of which is called an "attachment")
105	}	244	to it. All such attachable objects support the following methods.
106		245
107	sub clone {	246	In the following description, CLASS can be any of C<global>, C<object>
108	warn "clone<@_>\n";	247	C<player>, C<client> or C<map> (i.e. the attachable objects in
109	}	248	crossfire+).
110		249
111	#############################################################################	250	=over 4
112	# "new" plug-in system
113		251
114	=item cf::object::attach ... # NYI	252	=item $attachable->attach ($attachment, key => $value...)
115		253
116	=item cf::attach_global ...	254	=item $attachable->detach ($attachment)
117		255
118	=item cf::attach_to_type ...	256	Attach/detach a pre-registered attachment to a specific object and give it
		257	the specified key/value pairs as arguments.
119		258
120	=item cf::attach_to_objects ...	259	Example, attach a minesweeper attachment to the given object, making it a
		260	10x10 minesweeper game:
121		261
122	=item cf::attach_to_players ...	262	$obj->attach (minesweeper => width => 10, height => 10);
123		263
124	=item cf::attach_to_maps ...	264	=item $bool = $attachable->attached ($name)
125		265
126	prio => $number, # lower is earlier	266	Checks wether the named attachment is currently attached to the object.
127	on_xxx => \&cb,	267
		268	=item cf::CLASS->attach ...
		269
		270	=item cf::CLASS->detach ...
		271
		272	Define an anonymous attachment and attach it to all objects of the given
		273	CLASS. See the next function for an explanation of its arguments.
		274
		275	You can attach to global events by using the C<cf::global> class.
		276
		277	Example, log all player logins:
		278
		279	cf::player->attach (
		280	on_login => sub {
		281	my ($pl) = @_;
		282	...
		283	},
		284	);
		285
		286	Example, attach to the jeweler skill:
		287
		288	cf::object->attach (
		289	type => cf::SKILL,
		290	subtype => cf::SK_JEWELER,
		291	on_use_skill => sub {
		292	my ($sk, $ob, $part, $dir, $msg) = @_;
		293	...
		294	},
		295	);
		296
		297	=item cf::CLASS::attachment $name, ...
		298
		299	Register an attachment by C<$name> through which attachable objects of the
		300	given CLASS can refer to this attachment.
		301
		302	Some classes such as crossfire maps and objects can specify attachments
		303	that are attached at load/instantiate time, thus the need for a name.
		304
		305	These calls expect any number of the following handler/hook descriptions:
		306
		307	=over 4
		308
		309	=item prio => $number
		310
		311	Set the priority for all following handlers/hooks (unless overwritten
		312	by another C<prio> setting). Lower priority handlers get executed
		313	earlier. The default priority is C<0>, and many built-in handlers are
		314	registered at priority C<-1000>, so lower priorities should not be used
		315	unless you know what you are doing.
		316
		317	=item type => $type
		318
		319	(Only for C<< cf::object->attach >> calls), limits the attachment to the
		320	given type of objects only (the additional parameter C<subtype> can be
		321	used to further limit to the given subtype).
		322
		323	=item on_I<event> => \&cb
		324
		325	Call the given code reference whenever the named event happens (event is
		326	something like C<instantiate>, C<apply>, C<use_skill> and so on, and which
		327	handlers are recognised generally depends on the type of object these
		328	handlers attach to).
		329
		330	See F<include/eventinc.h> for the full list of events supported, and their
		331	class.
		332
128	package => package::,	333	=item package => package::
		334
		335	Look for sub functions of the name C<< on_I<event> >> in the given
		336	package and register them. Only handlers for eevents supported by the
		337	object/class are recognised.
		338
		339	=back
		340
		341	Example, define an attachment called "sockpuppet" that calls the given
		342	event handler when a monster attacks:
		343
		344	cf::object::attachment sockpuppet =>
		345	on_skill_attack => sub {
		346	my ($self, $victim) = @_;
		347	...
		348	}
		349	}
		350
		351	=item $attachable->valid
		352
		353	Just because you have a perl object does not mean that the corresponding
		354	C-level object still exists. If you try to access an object that has no
		355	valid C counterpart anymore you get an exception at runtime. This method
		356	can be used to test for existence of the C object part without causing an
		357	exception.
129		358
130	=cut	359	=cut
131		360
132	# the following variables are defined in .xs and must not be re-created	361	# the following variables are defined in .xs and must not be re-created
133	our @CB_GLOBAL = (); # registry for all global events	362	our @CB_GLOBAL = (); # registry for all global events
134	our @CB_OBJECT = ();	363	our @CB_ATTACHABLE = (); # registry for all attachables
		364	our @CB_OBJECT = (); # all objects (should not be used except in emergency)
135	our @CB_PLAYER = ();	365	our @CB_PLAYER = ();
		366	our @CB_CLIENT = ();
136	our @CB_TYPE = (); # registry for type (cf-object class) based events	367	our @CB_TYPE = (); # registry for type (cf-object class) based events
137	our @CB_MAP = ();	368	our @CB_MAP = ();
138		369
		370	my %attachment;
		371
139	sub _attach_cb($\%$$$) {	372	sub _attach_cb($$$$) {
140	my ($registry, $undo, $event, $prio, $cb) = @_;	373	my ($registry, $event, $prio, $cb) = @_;
141		374
142	use sort 'stable';	375	use sort 'stable';
143		376
144	$cb = [$prio, $cb];	377	$cb = [$prio, $cb];
145		378
146	@{$registry->[$event]} = sort	379	@{$registry->[$event]} = sort
147	{ $a->[0] cmp $b->[0] }	380	{ $a->[0] cmp $b->[0] }
148	@{$registry->[$event] || []}, $cb;	381	@{$registry->[$event] || []}, $cb;
149
150	push @{$undo->{cb}}, [$event, $cb];
151	}	382	}
		383
		384	# hack
		385	my %attachable_klass = map +($_ => 1), KLASS_OBJECT, KLASS_CLIENT, KLASS_PLAYER, KLASS_MAP;
152		386
153	# attach handles attaching event callbacks	387	# attach handles attaching event callbacks
154	# the only thing the caller has to do is pass the correct	388	# the only thing the caller has to do is pass the correct
155	# registry (== where the callback attaches to).	389	# registry (== where the callback attaches to).
156	sub _attach(\@$\@) {	390	sub _attach {
157	my ($registry, $klass, $arg) = @_;	391	my ($registry, $klass, @arg) = @_;
158		392
		393	my $object_type;
159	my $prio = 0;	394	my $prio = 0;
160
161	my %undo = (
162	registry => $registry,
163	cb => [],
164	);
165
166	my %cb_id = map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == $klass, 0 .. $#EVENT;	395	my %cb_id = map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == $klass, 0 .. $#EVENT;
167		396
		397	#TODO: get rid of this hack
		398	if ($attachable_klass{$klass}) {
		399	%cb_id = (%cb_id, map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == KLASS_ATTACHABLE, 0 .. $#EVENT);
		400	}
		401
168	while (@$arg) {	402	while (@arg) {
169	my $type = shift @$arg;	403	my $type = shift @arg;
170		404
171	if ($type eq "prio") {	405	if ($type eq "prio") {
172	$prio = shift @$arg;	406	$prio = shift @arg;
		407
		408	} elsif ($type eq "type") {
		409	$object_type = shift @arg;
		410	$registry = $CB_TYPE[$object_type] ||= [];
		411
		412	} elsif ($type eq "subtype") {
		413	defined $object_type or Carp::croak "subtype specified without type";
		414	my $object_subtype = shift @arg;
		415	$registry = $CB_TYPE[$object_type + $object_subtype * NUM_SUBTYPES] ||= [];
173		416
174	} elsif ($type eq "package") {	417	} elsif ($type eq "package") {
175	my $pkg = shift @$arg;	418	my $pkg = shift @arg;
176		419
177	while (my ($name, $id) = each %cb_id) {	420	while (my ($name, $id) = each %cb_id) {
178	if (my $cb = $pkg->can ($name)) {	421	if (my $cb = $pkg->can ($name)) {
179	_attach_cb $registry, %undo, $id, $prio, $cb;	422	_attach_cb $registry, $id, $prio, $cb;
180	}	423	}
181	}	424	}
182		425
183	} elsif (exists $cb_id{$type}) {	426	} elsif (exists $cb_id{$type}) {
184	_attach_cb $registry, %undo, $cb_id{$type}, $prio, shift @$arg;	427	_attach_cb $registry, $cb_id{$type}, $prio, shift @arg;
185		428
186	} elsif (ref $type) {	429	} elsif (ref $type) {
187	warn "attaching objects not supported, ignoring.\n";	430	warn "attaching objects not supported, ignoring.\n";
188		431
189	} else {	432	} else {
190	shift @$arg;	433	shift @arg;
191	warn "attach argument '$type' not supported, ignoring.\n";	434	warn "attach argument '$type' not supported, ignoring.\n";
192	}	435	}
193	}	436	}
194
195	\%undo
196	}	437	}
197		438
198	sub cf::object::attach {	439	sub _object_attach {
199	die;	440	my ($obj, $name, %arg) = @_;
200	}
201		441
202	sub attach_global {	442	return if exists $obj->{_attachment}{$name};
203	_attach @CB_GLOBAL, KLASS_GLOBAL, @_
204	}
205		443
206	sub attach_to_type {	444	if (my $attach = $attachment{$name}) {
207	my $type = shift;	445	my $registry = $obj->registry;
208	_attach @{$CB_TYPE[$type]}, KLASS_OBJECT, @_
209	}
210		446
211	sub attach_to_objects {	447	for (@$attach) {
212	_attach @CB_OBJECT, KLASS_OBJECT, @_	448	my ($klass, @attach) = @$_;
213	}	449	_attach $registry, $klass, @attach;
		450	}
214		451
215	sub attach_to_players {	452	$obj->{$name} = \%arg;
216	_attach @CB_PLAYER, KLASS_PLAYER, @_	453	} else {
217	}	454	warn "object uses attachment '$name' that is not available, postponing.\n";
		455	}
218		456
219	sub attach_to_maps {	457	$obj->{_attachment}{$name} = undef;
220	_attach @CB_MAP, KLASS_MAP, @_	458	}
		459
		460	sub cf::attachable::attach {
		461	if (ref $_[0]) {
		462	_object_attach @_;
		463	} else {
		464	_attach shift->_attach_registry, @_;
		465	}
		466	};
		467
		468	# all those should be optimised
		469	sub cf::attachable::detach {
		470	my ($obj, $name) = @_;
		471
		472	if (ref $obj) {
		473	delete $obj->{_attachment}{$name};
		474	reattach ($obj);
		475	} else {
		476	Carp::croak "cannot, currently, detach class attachments";
		477	}
		478	};
		479
		480	sub cf::attachable::attached {
		481	my ($obj, $name) = @_;
		482
		483	exists $obj->{_attachment}{$name}
		484	}
		485
		486	for my $klass (qw(ATTACHABLE GLOBAL OBJECT PLAYER CLIENT MAP)) {
		487	eval "#line " . __LINE__ . " 'cf.pm'
		488	sub cf::\L$klass\E::_attach_registry {
		489	(\\\@CB_$klass, KLASS_$klass)
		490	}
		491
		492	sub cf::\L$klass\E::attachment {
		493	my \$name = shift;
		494
		495	\$attachment{\$name} = [[KLASS_$klass, \@_]];
		496	}
		497	";
		498	die if $@;
221	}	499	}
222		500
223	our $override;	501	our $override;
		502	our @invoke_results = (); # referenced from .xs code. TODO: play tricks with reify and mortals?
224		503
225	sub override() {	504	sub override {
226	$override = 1	505	$override = 1;
		506	@invoke_results = ();
227	}	507	}
228		508
229	sub invoke {	509	sub do_invoke {
230	my $event = shift;	510	my $event = shift;
231	my $callbacks = shift;	511	my $callbacks = shift;
232		512
		513	@invoke_results = ();
		514
233	local $override;	515	local $override;
234		516
235	for (@$callbacks) {	517	for (@$callbacks) {
236	eval { &{$_->[1]} };	518	eval { &{$_->[1]} };
237		519
238	if ($@) {	520	if ($@) {
239	warn "$@";	521	warn "$@";
240	warn "... while processing $EVENT[$event][0] event, skipping processing altogether.\n";	522	warn "... while processing $EVENT[$event][0](@_) event, skipping processing altogether.\n";
241	override;	523	override;
242	}	524	}
243		525
244	return 1 if $override;	526	return 1 if $override;
245	}	527	}
246		528
247	0	529	0
248	}	530	}
249		531
		532	=item $bool = cf::global::invoke (EVENT_CLASS_XXX, ...)
		533
		534	=item $bool = $attachable->invoke (EVENT_CLASS_XXX, ...)
		535
		536	Generate an object-specific event with the given arguments.
		537
		538	This API is preliminary (most likely, the EVENT_CLASS_xxx prefix will be
		539	removed in future versions), and there is no public API to access override
		540	results (if you must, access C<@cf::invoke_results> directly).
		541
		542	=back
		543
		544	=cut
		545
250	#############################################################################	546	#############################################################################
251	# old plug-in events	547	# object support
252		548
253	sub inject_event {	549	sub reattach {
254	my $extension = shift;	550	# basically do the same as instantiate, without calling instantiate
255	my $event_code = shift;	551	my ($obj) = @_;
256		552
257	my $cb = $hook[$event_code]{$extension}	553	my $registry = $obj->registry;
		554
		555	@$registry = ();
		556
		557	delete $obj->{_attachment} unless scalar keys %{ $obj->{_attachment} || {} };
		558
		559	for my $name (keys %{ $obj->{_attachment} || {} }) {
		560	if (my $attach = $attachment{$name}) {
		561	for (@$attach) {
		562	my ($klass, @attach) = @$_;
		563	_attach $registry, $klass, @attach;
		564	}
		565	} else {
		566	warn "object uses attachment '$name' that is not available, postponing.\n";
		567	}
		568	}
		569	}
		570
		571	cf::attachable->attach (
		572	prio => -1000000,
		573	on_instantiate => sub {
		574	my ($obj, $data) = @_;
		575
		576	$data = from_json $data;
		577
		578	for (@$data) {
		579	my ($name, $args) = @$_;
		580
		581	$obj->attach ($name, %{$args || {} });
		582	}
		583	},
		584	on_reattach => \&reattach,
		585	on_clone => sub {
		586	my ($src, $dst) = @_;
		587
		588	@{$dst->registry} = @{$src->registry};
		589
		590	%$dst = %$src;
		591
		592	%{$dst->{_attachment}} = %{$src->{_attachment}}
		593	if exists $src->{_attachment};
		594	},
		595	);
		596
		597	sub object_freezer_save {
		598	my ($filename, $rdata, $objs) = @_;
		599
		600	sync_job {
		601	if (length $$rdata) {
		602	warn sprintf "saving %s (%d,%d)\n",
		603	$filename, length $$rdata, scalar @$objs;
		604
		605	if (my $fh = aio_open "$filename~", O_WRONLY | O_CREAT, 0600) {
		606	chmod SAVE_MODE, $fh;
		607	aio_write $fh, 0, (length $$rdata), $$rdata, 0;
		608	aio_fsync $fh;
		609	close $fh;
		610
		611	if (@$objs) {
		612	if (my $fh = aio_open "$filename.pst~", O_WRONLY | O_CREAT, 0600) {
		613	chmod SAVE_MODE, $fh;
		614	my $data = Storable::nfreeze { version => 1, objs => $objs };
		615	aio_write $fh, 0, (length $data), $data, 0;
		616	aio_fsync $fh;
		617	close $fh;
		618	aio_rename "$filename.pst~", "$filename.pst";
		619	}
		620	} else {
		621	aio_unlink "$filename.pst";
		622	}
		623
		624	aio_rename "$filename~", $filename;
		625	} else {
		626	warn "FATAL: $filename~: $!\n";
		627	}
		628	} else {
		629	aio_unlink $filename;
		630	aio_unlink "$filename.pst";
		631	}
		632	}
		633	}
		634
		635	sub object_freezer_as_string {
		636	my ($rdata, $objs) = @_;
		637
		638	use Data::Dumper;
		639
		640	$$rdata . Dumper $objs
		641	}
		642
		643	sub object_thawer_load {
		644	my ($filename) = @_;
		645
		646	my ($data, $av);
		647
		648	(aio_load $filename, $data) >= 0
258	or return;	649	or return;
259		650
260	&$cb	651	unless (aio_stat "$filename.pst") {
261	}	652	(aio_load "$filename.pst", $av) >= 0
262
263	sub inject_global_event {
264	my $event = shift;
265
266	my $cb = $hook[$event]
267	or return;	653	or return;
268		654	$av = eval { (Storable::thaw <$av>)->{objs} };
269	List::Util::max map &$_, values %$cb
270	}
271
272	sub inject_command {
273	my ($name, $obj, $params) = @_;
274
275	for my $cmd (@{ $command{$name} }) {
276	$cmd->[1]->($obj, $params);
277	}	655	}
278		656
279	-1	657	return ($data, $av);
280	}	658	}
		659
		660	#############################################################################
		661	# command handling &c
		662
		663	=item cf::register_command $name => \&callback($ob,$args);
		664
		665	Register a callback for execution when the client sends the user command
		666	$name.
		667
		668	=cut
281		669
282	sub register_command {	670	sub register_command {
283	my ($name, $time, $cb) = @_;	671	my ($name, $cb) = @_;
284		672
285	my $caller = caller;	673	my $caller = caller;
286	#warn "registering command '$name/$time' to '$caller'";	674	#warn "registering command '$name/$time' to '$caller'";
287		675
288	push @{ $command{$name} }, [$time, $cb, $caller];	676	push @{ $COMMAND{$name} }, [$caller, $cb];
289	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @{ $command{$name} };
290	}	677	}
		678
		679	=item cf::register_extcmd $name => \&callback($pl,$packet);
		680
		681	Register a callbackf ro execution when the client sends an extcmd packet.
		682
		683	If the callback returns something, it is sent back as if reply was being
		684	called.
		685
		686	=cut
291		687
292	sub register_extcmd {	688	sub register_extcmd {
293	my ($name, $cb) = @_;	689	my ($name, $cb) = @_;
294		690
295	my $caller = caller;	691	my $caller = caller;
296	#warn "registering extcmd '$name' to '$caller'";	692	#warn "registering extcmd '$name' to '$caller'";
297		693
298	$extcmd{$name} = [$cb, $caller];	694	$EXTCMD{$name} = [$cb, $caller];
299	}	695	}
		696
		697	cf::player->attach (
		698	on_command => sub {
		699	my ($pl, $name, $params) = @_;
		700
		701	my $cb = $COMMAND{$name}
		702	or return;
		703
		704	for my $cmd (@$cb) {
		705	$cmd->[1]->($pl->ob, $params);
		706	}
		707
		708	cf::override;
		709	},
		710	on_extcmd => sub {
		711	my ($pl, $buf) = @_;
		712
		713	my $msg = eval { from_json $buf };
		714
		715	if (ref $msg) {
		716	if (my $cb = $EXTCMD{$msg->{msgtype}}) {
		717	if (my %reply = $cb->[0]->($pl, $msg)) {
		718	$pl->ext_reply ($msg->{msgid}, %reply);
		719	}
		720	}
		721	} else {
		722	warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";
		723	}
		724
		725	cf::override;
		726	},
		727	);
300		728
301	sub register {	729	sub register {
302	my ($base, $pkg) = @_;	730	my ($base, $pkg) = @_;
303		731
304	for my $idx (0 .. $#PLUGIN_EVENT) {	732	#TODO
305	if (my $ref = $pkg->can ("on_$PLUGIN_EVENT[$idx]")) {
306	#warn "registering $PLUGIN_EVENT[$idx] hook to '$pkg'\n";
307	$hook[$idx]{$base} = $ref;
308	}
309	}
310	}	733	}
311		734
312	sub load_extension {	735	sub load_extension {
313	my ($path) = @_;	736	my ($path) = @_;
314		737
…		…
328	. "#line 1 \"$path\"\n{\n"	751	. "#line 1 \"$path\"\n{\n"
329	. (do { local $/; <$fh> })	752	. (do { local $/; <$fh> })
330	. "\n};\n1";	753	. "\n};\n1";
331		754
332	eval $source	755	eval $source
333	or die "$path: $@";	756	or die $@ ? "$path: $@\n"
		757	: "extension disabled.\n";
334		758
335	push @exts, $pkg;	759	push @exts, $pkg;
336	$ext_pkg{$base} = $pkg;	760	$ext_pkg{$base} = $pkg;
337		761
338	# no strict 'refs';	762	# no strict 'refs';
…		…
345	my ($pkg) = @_;	769	my ($pkg) = @_;
346		770
347	warn "removing extension $pkg\n";	771	warn "removing extension $pkg\n";
348		772
349	# remove hooks	773	# remove hooks
		774	#TODO
350	for my $idx (0 .. $#PLUGIN_EVENT) {	775	# for my $idx (0 .. $#PLUGIN_EVENT) {
351	delete $hook[$idx]{$pkg};	776	# delete $hook[$idx]{$pkg};
352	}	777	# }
353		778
354	# remove commands	779	# remove commands
355	for my $name (keys %command) {	780	for my $name (keys %COMMAND) {
356	my @cb = grep $_->[2] ne $pkg, @{ $command{$name} };	781	my @cb = grep $_->[0] ne $pkg, @{ $COMMAND{$name} };
357		782
358	if (@cb) {	783	if (@cb) {
359	$command{$name} = \@cb;	784	$COMMAND{$name} = \@cb;
360	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @cb;
361	} else {	785	} else {
362	delete $command{$name};
363	delete $COMMAND{"$name\000"};	786	delete $COMMAND{$name};
364	}	787	}
365	}	788	}
366		789
367	# remove extcmds	790	# remove extcmds
368	for my $name (grep $extcmd{$_}[1] eq $pkg, keys %extcmd) {	791	for my $name (grep $EXTCMD{$_}[1] eq $pkg, keys %EXTCMD) {
369	delete $extcmd{$name};	792	delete $EXTCMD{$name};
370	}	793	}
371		794
372	if (my $cb = $pkg->can ("unload")) {	795	if (my $cb = $pkg->can ("unload")) {
373	eval {	796	eval {
374	$cb->($pkg);	797	$cb->($pkg);
…		…
378		801
379	Symbol::delete_package $pkg;	802	Symbol::delete_package $pkg;
380	}	803	}
381		804
382	sub load_extensions {	805	sub load_extensions {
383	my $LIBDIR = maps_directory "perl";
384
385	for my $ext (<$LIBDIR/*.ext>) {	806	for my $ext (<$LIBDIR/*.ext>) {
386	next unless -r $ext;	807	next unless -r $ext;
387	eval {	808	eval {
388	load_extension $ext;	809	load_extension $ext;
389	1	810	1
390	} or warn "$ext not loaded: $@";	811	} or warn "$ext not loaded: $@";
391	}	812	}
392	}	813	}
393		814
394	sub _perl_reload(&) {
395	my ($msg) = @_;
396
397	$msg->("reloading...");
398
399	eval {
400	# 1. cancel all watchers
401	$_->cancel for Event::all_watchers;
402
403	# 2. unload all extensions
404	for (@exts) {
405	$msg->("unloading <$_>");
406	unload_extension $_;
407	}
408
409	# 3. unload all modules loaded from $LIBDIR
410	while (my ($k, $v) = each %INC) {
411	next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;
412
413	$msg->("removing <$k>");
414	delete $INC{$k};
415
416	$k =~ s/\.pm$//;
417	$k =~ s/\//::/g;
418
419	if (my $cb = $k->can ("unload_module")) {
420	$cb->();
421	}
422
423	Symbol::delete_package $k;
424	}
425
426	# 4. get rid of safe::, as good as possible
427	Symbol::delete_package "safe::$_"
428	for qw(cf::object cf::object::map cf::object::player cf::player cf::map cf::party cf::region);
429
430	# 5. remove register_script_function callbacks
431	# TODO
432
433	# 6. unload cf.pm "a bit"
434	delete $INC{"cf.pm"};
435
436	# don't, removes xs symbols, too,
437	# and global variables created in xs
438	#Symbol::delete_package __PACKAGE__;
439
440	# 7. reload cf.pm
441	$msg->("reloading cf.pm");
442	require cf;
443	};
444	$msg->($@) if $@;
445
446	$msg->("reloaded");
447	};
448
449	sub perl_reload() {
450	_perl_reload {
451	warn $_[0];
452	print "$_[0]\n";
453	};
454	}
455
456	register_command "perl-reload", 0, sub {
457	my ($who, $arg) = @_;
458
459	if ($who->flag (FLAG_WIZ)) {
460	_perl_reload {
461	warn $_[0];
462	$who->message ($_[0]);
463	};
464	}
465	};
466
467	#############################################################################
468	# utility functions
469
470	use JSON::Syck (); # TODO# replace by JSON::PC once working
471
472	sub from_json($) {
473	$JSON::Syck::ImplicitUnicode = 1; # work around JSON::Syck bugs
474	JSON::Syck::Load $_[0]
475	}
476
477	sub to_json($) {
478	$JSON::Syck::ImplicitUnicode = 0; # work around JSON::Syck bugs
479	JSON::Syck::Dump $_[0]
480	}
481
482	#############################################################################
483	# extcmd framework, basically convert ext <msg>
484	# into pkg::->on_extcmd_arg1 (...) while shortcutting a few
485
486	attach_to_players
487	on_extcmd => sub {
488	my ($pl, $buf) = @_;
489
490	my $msg = eval { from_json $buf };
491
492	if (ref $msg) {
493	if (my $cb = $extcmd{$msg->{msgtype}}) {
494	if (my %reply = $cb->[0]->($pl, $msg)) {
495	$pl->ext_reply ($msg->{msgid}, %reply);
496	}
497	}
498	} else {
499	warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";
500	}
501
502	cf::override;
503	},
504	;
505
506	#############################################################################	815	#############################################################################
507	# load/save/clean perl data associated with a map	816	# load/save/clean perl data associated with a map
508		817
509	*cf::mapsupport::on_clean = sub {	818	*cf::mapsupport::on_clean = sub {
510	my ($map) = @_;	819	my ($map) = @_;
511		820
512	my $path = $map->tmpname;	821	my $path = $map->tmpname;
513	defined $path or return;	822	defined $path or return;
514		823
515	unlink "$path.cfperl";	824	unlink "$path.pst";
516	};	825	};
517		826
518	*cf::mapsupport::on_swapin =
519	*cf::mapsupport::on_load = sub {
520	my ($map) = @_;
521
522	my $path = $map->tmpname;
523	$path = $map->path unless defined $path;
524
525	open my $fh, "<:raw", "$path.cfperl"
526	or return; # no perl data
527
528	my $data = Storable::thaw do { local $/; <$fh> };
529
530	$data->{version} <= 1
531	or return; # too new
532
533	$map->_set_obs ($data->{obs});
534	};
535
536	*cf::mapsupport::on_swapout = sub {
537	my ($map) = @_;
538
539	my $path = $map->tmpname;
540	$path = $map->path unless defined $path;
541
542	my $obs = $map->_get_obs;
543
544	if (defined $obs) {
545	open my $fh, ">:raw", "$path.cfperl"
546	or die "$path.cfperl: $!";
547
548	stat $path;
549
550	print $fh Storable::nfreeze {
551	size => (stat _)[7],
552	time => (stat _)[9],
553	version => 1,
554	obs => $obs,
555	};
556
557	chmod SAVE_MODE, "$path.cfperl"; # very racy, but cf-compatible *g*
558	} else {
559	unlink "$path.cfperl";
560	}
561	};
562
563	attach_to_maps prio => -10000, package => cf::mapsupport::;	827	cf::map->attach (prio => -10000, package => cf::mapsupport::);
564		828
565	#############################################################################	829	#############################################################################
566	# load/save perl data associated with player->ob objects	830	# load/save perl data associated with player->ob objects
567		831
568	sub all_objects(@) {	832	sub all_objects(@) {
569	@_, map all_objects ($_->inv), @_	833	@_, map all_objects ($_->inv), @_
570	}	834	}
571		835
572	attach_to_players	836	# TODO: compatibility cruft, remove when no longer needed
		837	cf::player->attach (
573	on_load => sub {	838	on_load => sub {
574	my ($pl, $path) = @_;	839	my ($pl, $path) = @_;
575		840
576	for my $o (all_objects $pl->ob) {	841	for my $o (all_objects $pl->ob) {
577	if (my $value = $o->get_ob_key_value ("_perl_data")) {	842	if (my $value = $o->get_ob_key_value ("_perl_data")) {
…		…
579		844
580	%$o = %{ Storable::thaw pack "H*", $value };	845	%$o = %{ Storable::thaw pack "H*", $value };
581	}	846	}
582	}	847	}
583	},	848	},
584	on_save => sub {	849	);
585	my ($pl, $path) = @_;
586
587	$_->set_ob_key_value (_perl_data => unpack "H*", Storable::nfreeze $_)
588	for grep %$_, all_objects $pl->ob;
589	},
590	;
591		850
592	#############################################################################	851	#############################################################################
593	# core extensions - in perl	852
		853	=head2 CORE EXTENSIONS
		854
		855	Functions and methods that extend core crossfire objects.
		856
		857	=head3 cf::player
		858
		859	=over 4
594		860
595	=item cf::player::exists $login	861	=item cf::player::exists $login
596		862
597	Returns true when the given account exists.	863	Returns true when the given account exists.
598		864
…		…
601	sub cf::player::exists($) {	867	sub cf::player::exists($) {
602	cf::player::find $_[0]	868	cf::player::find $_[0]
603	or -f sprintf "%s/%s/%s/%s.pl", cf::localdir, cf::playerdir, ($_[0]) x 2;	869	or -f sprintf "%s/%s/%s/%s.pl", cf::localdir, cf::playerdir, ($_[0]) x 2;
604	}	870	}
605		871
		872	=item $player->ext_reply ($msgid, $msgtype, %msg)
		873
		874	Sends an ext reply to the player.
		875
		876	=cut
		877
		878	sub cf::player::ext_reply($$$%) {
		879	my ($self, $id, %msg) = @_;
		880
		881	$msg{msgid} = $id;
		882
		883	$self->send ("ext " . to_json \%msg);
		884	}
		885
		886	=back
		887
		888	=head3 cf::object::player
		889
		890	=over 4
		891
606	=item $player->reply ($npc, $msg[, $flags])	892	=item $player_object->reply ($npc, $msg[, $flags])
607		893
608	Sends a message to the player, as if the npc C<$npc> replied. C<$npc>	894	Sends a message to the player, as if the npc C<$npc> replied. C<$npc>
609	can be C<undef>. Does the right thing when the player is currently in a	895	can be C<undef>. Does the right thing when the player is currently in a
610	dialogue with the given NPC character.	896	dialogue with the given NPC character.
611		897
612	=cut	898	=cut
613		899
614	# rough implementation of a future "reply" method that works	900	# rough implementation of a future "reply" method that works
615	# with dialog boxes.	901	# with dialog boxes.
		902	#TODO: the first argument must go, split into a $npc->reply_to ( method
616	sub cf::object::player::reply($$$;$) {	903	sub cf::object::player::reply($$$;$) {
617	my ($self, $npc, $msg, $flags) = @_;	904	my ($self, $npc, $msg, $flags) = @_;
618		905
619	$flags = cf::NDI_BROWN | cf::NDI_UNIQUE unless @_ >= 4;	906	$flags = cf::NDI_BROWN | cf::NDI_UNIQUE unless @_ >= 4;
620		907
…		…
624	$msg = $npc->name . " says: $msg" if $npc;	911	$msg = $npc->name . " says: $msg" if $npc;
625	$self->message ($msg, $flags);	912	$self->message ($msg, $flags);
626	}	913	}
627	}	914	}
628		915
629	=item $player->ext_reply ($msgid, $msgtype, %msg)	916	=item $player_object->may ("access")
630		917
631	Sends an ext reply to the player.	918	Returns wether the given player is authorized to access resource "access"
		919	(e.g. "command_wizcast").
632		920
633	=cut	921	=cut
634		922
635	sub cf::player::ext_reply($$$%) {	923	sub cf::object::player::may {
		924	my ($self, $access) = @_;
		925
		926	$self->flag (cf::FLAG_WIZ) ||
		927	(ref $cf::CFG{"may_$access"}
		928	? scalar grep $self->name eq $_, @{$cf::CFG{"may_$access"}}
		929	: $cf::CFG{"may_$access"})
		930	}
		931
		932	=head3 cf::client
		933
		934	=over 4
		935
		936	=item $client->send_drawinfo ($text, $flags)
		937
		938	Sends a drawinfo packet to the client. Circumvents output buffering so
		939	should not be used under normal circumstances.
		940
		941	=cut
		942
		943	sub cf::client::send_drawinfo {
		944	my ($self, $text, $flags) = @_;
		945
		946	utf8::encode $text;
		947	$self->send_packet (sprintf "drawinfo %d %s", $flags, $text);
		948	}
		949
		950
		951	=item $success = $client->query ($flags, "text", \&cb)
		952
		953	Queues a query to the client, calling the given callback with
		954	the reply text on a reply. flags can be C<cf::CS_QUERY_YESNO>,
		955	C<cf::CS_QUERY_SINGLECHAR> or C<cf::CS_QUERY_HIDEINPUT> or C<0>.
		956
		957	Queries can fail, so check the return code. Or don't, as queries will become
		958	reliable at some point in the future.
		959
		960	=cut
		961
		962	sub cf::client::query {
		963	my ($self, $flags, $text, $cb) = @_;
		964
		965	return unless $self->state == ST_PLAYING
		966	|| $self->state == ST_SETUP
		967	|| $self->state == ST_CUSTOM;
		968
		969	$self->state (ST_CUSTOM);
		970
		971	utf8::encode $text;
		972	push @{ $self->{query_queue} }, [(sprintf "query %d %s", $flags, $text), $cb];
		973
		974	$self->send_packet ($self->{query_queue}[0][0])
		975	if @{ $self->{query_queue} } == 1;
		976	}
		977
		978	cf::client->attach (
		979	on_reply => sub {
		980	my ($ns, $msg) = @_;
		981
		982	# this weird shuffling is so that direct followup queries
		983	# get handled first
		984	my $queue = delete $ns->{query_queue};
		985
		986	(shift @$queue)->[1]->($msg);
		987
		988	push @{ $ns->{query_queue} }, @$queue;
		989
		990	if (@{ $ns->{query_queue} } == @$queue) {
		991	if (@$queue) {
		992	$ns->send_packet ($ns->{query_queue}[0][0]);
		993	} else {
		994	$ns->state (ST_PLAYING) if $ns->state == ST_CUSTOM;
		995	}
		996	}
		997	},
		998	);
		999
		1000	=item $client->coro (\&cb)
		1001
		1002	Create a new coroutine, running the specified callback. The coroutine will
		1003	be automatically cancelled when the client gets destroyed (e.g. on logout,
		1004	or loss of connection).
		1005
		1006	=cut
		1007
		1008	sub cf::client::coro {
636	my ($self, $id, %msg) = @_;	1009	my ($self, $cb) = @_;
637		1010
638	$msg{msgid} = $id;	1011	my $coro; $coro = async {
		1012	eval {
		1013	$cb->();
		1014	};
		1015	warn $@ if $@;
		1016	};
639		1017
640	$self->send ("ext " . to_json \%msg);	1018	$coro->on_destroy (sub {
641	}	1019	delete $self->{_coro}{$coro+0};
		1020	});
642		1021
643	#############################################################################	1022	$self->{_coro}{$coro+0} = $coro;
644	# map scripting support	1023
		1024	$coro
		1025	}
		1026
		1027	cf::client->attach (
		1028	on_destroy => sub {
		1029	my ($ns) = @_;
		1030
		1031	$_->cancel for values %{ (delete $ns->{_coro}) || {} };
		1032	},
		1033	);
		1034
		1035	=back
		1036
		1037
		1038	=head2 SAFE SCRIPTING
		1039
		1040	Functions that provide a safe environment to compile and execute
		1041	snippets of perl code without them endangering the safety of the server
		1042	itself. Looping constructs, I/O operators and other built-in functionality
		1043	is not available in the safe scripting environment, and the number of
		1044	functions and methods that can be called is greatly reduced.
		1045
		1046	=cut
645		1047
646	our $safe = new Safe "safe";	1048	our $safe = new Safe "safe";
647	our $safe_hole = new Safe::Hole;	1049	our $safe_hole = new Safe::Hole;
648		1050
649	$SIG{FPE} = 'IGNORE';	1051	$SIG{FPE} = 'IGNORE';
650		1052
651	$safe->permit_only (Opcode::opset qw(:base_core :base_mem :base_orig :base_math sort time));	1053	$safe->permit_only (Opcode::opset qw(:base_core :base_mem :base_orig :base_math sort time));
652		1054
653	# here we export the classes and methods available to script code	1055	# here we export the classes and methods available to script code
654		1056
		1057	=pod
		1058
		1059	The following fucntions and emthods are available within a safe environment:
		1060
		1061	cf::object contr pay_amount pay_player map
		1062	cf::object::player player
		1063	cf::player peaceful
		1064	cf::map trigger
		1065
		1066	=cut
		1067
655	for (	1068	for (
656	["cf::object" => qw(contr pay_amount pay_player)],	1069	["cf::object" => qw(contr pay_amount pay_player map)],
657	["cf::object::player" => qw(player)],	1070	["cf::object::player" => qw(player)],
658	["cf::player" => qw(peaceful)],	1071	["cf::player" => qw(peaceful)],
		1072	["cf::map" => qw(trigger)],
659	) {	1073	) {
660	no strict 'refs';	1074	no strict 'refs';
661	my ($pkg, @funs) = @$_;	1075	my ($pkg, @funs) = @$_;
662	*{"safe::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})	1076	*{"safe::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})
663	for @funs;	1077	for @funs;
664	}	1078	}
		1079
		1080	=over 4
		1081
		1082	=item @retval = safe_eval $code, [var => value, ...]
		1083
		1084	Compiled and executes the given perl code snippet. additional var/value
		1085	pairs result in temporary local (my) scalar variables of the given name
		1086	that are available in the code snippet. Example:
		1087
		1088	my $five = safe_eval '$first + $second', first => 1, second => 4;
		1089
		1090	=cut
665		1091
666	sub safe_eval($;@) {	1092	sub safe_eval($;@) {
667	my ($code, %vars) = @_;	1093	my ($code, %vars) = @_;
668		1094
669	my $qcode = $code;	1095	my $qcode = $code;
…		…
692	}	1118	}
693		1119
694	wantarray ? @res : $res[0]	1120	wantarray ? @res : $res[0]
695	}	1121	}
696		1122
		1123	=item cf::register_script_function $function => $cb
		1124
		1125	Register a function that can be called from within map/npc scripts. The
		1126	function should be reasonably secure and should be put into a package name
		1127	like the extension.
		1128
		1129	Example: register a function that gets called whenever a map script calls
		1130	C<rent::overview>, as used by the C<rent> extension.
		1131
		1132	cf::register_script_function "rent::overview" => sub {
		1133	...
		1134	};
		1135
		1136	=cut
		1137
697	sub register_script_function {	1138	sub register_script_function {
698	my ($fun, $cb) = @_;	1139	my ($fun, $cb) = @_;
699		1140
700	no strict 'refs';	1141	no strict 'refs';
701	*{"safe::$fun"} = $safe_hole->wrap ($cb);	1142	*{"safe::$fun"} = $safe_hole->wrap ($cb);
702	}	1143	}
703		1144
		1145	=back
		1146
		1147	=cut
		1148
		1149	#############################################################################
		1150
		1151	=head2 EXTENSION DATABASE SUPPORT
		1152
		1153	Crossfire maintains a very simple database for extension use. It can
		1154	currently store anything that can be serialised using Storable, which
		1155	excludes objects.
		1156
		1157	The parameter C<$family> should best start with the name of the extension
		1158	using it, it should be unique.
		1159
		1160	=over 4
		1161
		1162	=item $hashref = cf::db_get $family
		1163
		1164	Return a hashref for use by the extension C<$family>, which can be
		1165	modified. After modifications, you have to call C<cf::db_dirty> or
		1166	C<cf::db_sync>.
		1167
		1168	=item $value = cf::db_get $family => $key
		1169
		1170	Returns a single value from the database
		1171
		1172	=item cf::db_put $family => $hashref
		1173
		1174	Stores the given family hashref into the database. Updates are delayed, if
		1175	you want the data to be synced to disk immediately, use C<cf::db_sync>.
		1176
		1177	=item cf::db_put $family => $key => $value
		1178
		1179	Stores the given C<$value> in the family hash. Updates are delayed, if you
		1180	want the data to be synced to disk immediately, use C<cf::db_sync>.
		1181
		1182	=item cf::db_dirty
		1183
		1184	Marks the database as dirty, to be updated at a later time.
		1185
		1186	=item cf::db_sync
		1187
		1188	Immediately write the database to disk I<if it is dirty>.
		1189
		1190	=cut
		1191
		1192	our $DB;
		1193
		1194	{
		1195	my $path = cf::localdir . "/database.pst";
		1196
		1197	sub db_load() {
		1198	warn "loading database $path\n";#d# remove later
		1199	$DB = stat $path ? Storable::retrieve $path : { };
		1200	}
		1201
		1202	my $pid;
		1203
		1204	sub db_save() {
		1205	warn "saving database $path\n";#d# remove later
		1206	waitpid $pid, 0 if $pid;
		1207	if (0 == ($pid = fork)) {
		1208	$DB->{_meta}{version} = 1;
		1209	Storable::nstore $DB, "$path~";
		1210	rename "$path~", $path;
		1211	cf::_exit 0 if defined $pid;
		1212	}
		1213	}
		1214
		1215	my $dirty;
		1216
		1217	sub db_sync() {
		1218	db_save if $dirty;
		1219	undef $dirty;
		1220	}
		1221
		1222	my $idle = Event->idle (min => $TICK * 2.8, max => 10, repeat => 0, data => WF_AUTOCANCEL, cb => sub {
		1223	db_sync;
		1224	});
		1225
		1226	sub db_dirty() {
		1227	$dirty = 1;
		1228	$idle->start;
		1229	}
		1230
		1231	sub db_get($;$) {
		1232	@_ >= 2
		1233	? $DB->{$_[0]}{$_[1]}
		1234	: ($DB->{$_[0]} ||= { })
		1235	}
		1236
		1237	sub db_put($$;$) {
		1238	if (@_ >= 3) {
		1239	$DB->{$_[0]}{$_[1]} = $_[2];
		1240	} else {
		1241	$DB->{$_[0]} = $_[1];
		1242	}
		1243	db_dirty;
		1244	}
		1245
		1246	cf::global->attach (
		1247	prio => 10000,
		1248	on_cleanup => sub {
		1249	db_sync;
		1250	},
		1251	);
		1252	}
		1253
704	#############################################################################	1254	#############################################################################
705	# the server's main()	1255	# the server's main()
706		1256
		1257	sub cfg_load {
		1258	open my $fh, "<:utf8", cf::confdir . "/config"
		1259	or return;
		1260
		1261	local $/;
		1262	*CFG = YAML::Syck::Load <$fh>;
		1263	}
		1264
707	sub main {	1265	sub main {
		1266	cfg_load;
		1267	db_load;
		1268	load_extensions;
708	Event::loop;	1269	Event::loop;
709	}	1270	}
710		1271
711	#############################################################################	1272	#############################################################################
712	# initialisation	1273	# initialisation
713		1274
		1275	sub _perl_reload() {
		1276	warn "reloading...";
		1277
		1278	eval {
		1279	local $FREEZE = 1;
		1280
		1281	cf::emergency_save;
		1282
		1283	# cancel all watchers
		1284	for (Event::all_watchers) {
		1285	$_->cancel if $_->data & WF_AUTOCANCEL;
		1286	}
		1287
		1288	# cancel all extension coros
		1289	$_->cancel for values %EXT_CORO;
		1290	%EXT_CORO = ();
		1291
		1292	# unload all extensions
		1293	for (@exts) {
		1294	warn "unloading <$_>";
		1295	unload_extension $_;
		1296	}
		1297
		1298	# unload all modules loaded from $LIBDIR
		1299	while (my ($k, $v) = each %INC) {
		1300	next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;
		1301
		1302	warn "removing <$k>";
		1303	delete $INC{$k};
		1304
		1305	$k =~ s/\.pm$//;
		1306	$k =~ s/\//::/g;
		1307
		1308	if (my $cb = $k->can ("unload_module")) {
		1309	$cb->();
		1310	}
		1311
		1312	Symbol::delete_package $k;
		1313	}
		1314
		1315	# sync database to disk
		1316	cf::db_sync;
		1317	IO::AIO::flush;
		1318
		1319	# get rid of safe::, as good as possible
		1320	Symbol::delete_package "safe::$_"
		1321	for qw(cf::attachable cf::object cf::object::player cf::client cf::player cf::map cf::party cf::region);
		1322
		1323	# remove register_script_function callbacks
		1324	# TODO
		1325
		1326	# unload cf.pm "a bit"
		1327	delete $INC{"cf.pm"};
		1328
		1329	# don't, removes xs symbols, too,
		1330	# and global variables created in xs
		1331	#Symbol::delete_package __PACKAGE__;
		1332
		1333	# reload cf.pm
		1334	warn "reloading cf.pm";
		1335	require cf;
		1336	cf::_connect_to_perl; # nominally unnecessary, but cannot hurt
		1337
		1338	# load config and database again
		1339	cf::cfg_load;
		1340	cf::db_load;
		1341
		1342	# load extensions
		1343	warn "load extensions";
		1344	cf::load_extensions;
		1345
		1346	# reattach attachments to objects
		1347	warn "reattach";
		1348	_global_reattach;
		1349	};
		1350	warn $@ if $@;
		1351
		1352	warn "reloaded";
		1353	};
		1354
		1355	sub perl_reload() {
		1356	_perl_reload;
		1357	}
		1358
714	register "<global>", __PACKAGE__;	1359	register "<global>", __PACKAGE__;
715		1360
		1361	register_command "perl-reload" => sub {
		1362	my ($who, $arg) = @_;
		1363
		1364	if ($who->flag (FLAG_WIZ)) {
		1365	$who->message ("reloading...");
		1366	_perl_reload;
		1367	}
		1368	};
		1369
716	unshift @INC, $LIBDIR;	1370	unshift @INC, $LIBDIR;
717		1371
718	load_extensions;
719
720	$TICK_WATCHER = Event->timer (	1372	$TICK_WATCHER = Event->timer (
		1373	reentrant => 0,
721	prio => 1,	1374	prio => 0,
722	at => $NEXT_TICK || 1,	1375	at => $NEXT_TICK || $TICK,
		1376	data => WF_AUTOCANCEL,
723	cb => sub {	1377	cb => sub {
		1378	unless ($FREEZE) {
724	cf::server_tick; # one server iteration	1379	cf::server_tick; # one server iteration
		1380	$RUNTIME += $TICK;
		1381	}
725		1382
726	my $NOW = Event::time;
727	$NEXT_TICK += $TICK;	1383	$NEXT_TICK += $TICK;
728		1384
729	# if we are delayed by four ticks, skip them all	1385	# if we are delayed by four ticks or more, skip them all
730	$NEXT_TICK = $NOW if $NOW >= $NEXT_TICK + $TICK * 4;	1386	$NEXT_TICK = Event::time if Event::time >= $NEXT_TICK + $TICK * 4;
731		1387
732	$TICK_WATCHER->at ($NEXT_TICK);	1388	$TICK_WATCHER->at ($NEXT_TICK);
733	$TICK_WATCHER->start;	1389	$TICK_WATCHER->start;
734	},	1390	},
735	);	1391	);
736		1392
		1393	IO::AIO::max_poll_time $TICK * 0.2;
		1394
		1395	Event->io (fd => IO::AIO::poll_fileno,
		1396	poll => 'r',
		1397	prio => 5,
		1398	data => WF_AUTOCANCEL,
		1399	cb => \&IO::AIO::poll_cb);
		1400
		1401	# we must not ever block the main coroutine
		1402	$Coro::idle = sub {
		1403	#Carp::cluck "FATAL: Coro::idle was called, major BUG\n";#d#
		1404	warn "FATAL: Coro::idle was called, major BUG\n";
		1405	(Coro::unblock_sub {
		1406	Event::one_event;
		1407	})->();
		1408	};
		1409
737	1	1410	1
738		1411

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