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Comparing deliantra/server/lib/cf.pm (file contents):
Revision 1.47 by root, Sun Aug 27 13:02:04 2006 UTC vs.
Revision 1.94 by root, Thu Dec 21 23:02:54 2006 UTC

5use Storable; 5use Storable;
6use Opcode; 6use Opcode;
7use Safe; 7use Safe;
8use Safe::Hole; 8use Safe::Hole;
9 9
10use IO::AIO ();
11use YAML::Syck ();
10use Time::HiRes; 12use Time::HiRes;
11use Event; 13use Event;
12$Event::Eval = 1; # no idea why this is required, but it is 14$Event::Eval = 1; # no idea why this is required, but it is
13 15
16# work around bug in YAML::Syck - bad news for perl6, will it be as broken wrt. unicode?
17$YAML::Syck::ImplicitUnicode = 1;
18
14use strict; 19use strict;
15 20
16_reload_1; 21sub WF_AUTOCANCEL () { 1 } # automatically cancel this watcher on reload
17 22
18our %COMMAND = (); 23our %COMMAND = ();
24our %COMMAND_TIME = ();
25our %EXTCMD = ();
26
27_init_vars;
28
19our @EVENT; 29our @EVENT;
20our %PROP_TYPE; 30our $LIBDIR = datadir . "/ext";
21our %PROP_IDX;
22our $LIBDIR = maps_directory "perl";
23 31
24our $TICK = MAX_TIME * 1e-6; 32our $TICK = MAX_TIME * 1e-6;
25our $TICK_WATCHER; 33our $TICK_WATCHER;
26our $NEXT_TICK; 34our $NEXT_TICK;
35
36our %CFG;
37
38our $UPTIME; $UPTIME ||= time;
39
40#############################################################################
41
42=head2 GLOBAL VARIABLES
43
44=over 4
45
46=item $cf::UPTIME
47
48The timestamp of the server start (so not actually an uptime).
49
50=item $cf::LIBDIR
51
52The perl library directory, where extensions and cf-specific modules can
53be found. It will be added to C<@INC> automatically.
54
55=item $cf::TICK
56
57The interval between server ticks, in seconds.
58
59=item %cf::CFG
60
61Configuration for the server, loaded from C</etc/crossfire/config>, or
62from wherever your confdir points to.
63
64=back
65
66=cut
27 67
28BEGIN { 68BEGIN {
29 *CORE::GLOBAL::warn = sub { 69 *CORE::GLOBAL::warn = sub {
30 my $msg = join "", @_; 70 my $msg = join "", @_;
31 $msg .= "\n" 71 $msg .= "\n"
34 print STDERR "cfperl: $msg"; 74 print STDERR "cfperl: $msg";
35 LOG llevError, "cfperl: $msg"; 75 LOG llevError, "cfperl: $msg";
36 }; 76 };
37} 77}
38 78
39my %ignore_set = (MAP_PROP_PATH => 1); # I hate the plug-in api. Deeply! 79@safe::cf::global::ISA = @cf::global::ISA = 'cf::attachable';
40 80@safe::cf::object::ISA = @cf::object::ISA = 'cf::attachable';
41# generate property mutators 81@safe::cf::player::ISA = @cf::player::ISA = 'cf::attachable';
42sub prop_gen { 82@safe::cf::client::ISA = @cf::client::ISA = 'cf::attachable';
43 my ($prefix, $class) = @_; 83@safe::cf::map::ISA = @cf::map::ISA = 'cf::attachable';
44
45 no strict 'refs';
46
47 for my $prop (keys %PROP_TYPE) {
48 $prop =~ /^\Q$prefix\E_(.*$)/ or next;
49 my $sub = lc $1;
50
51 my $type = $PROP_TYPE{$prop};
52 my $idx = $PROP_IDX {$prop};
53
54 *{"$class\::get_$sub"} = *{"$class\::$sub"} = sub {
55 $_[0]->get_property ($type, $idx)
56 };
57
58 *{"$class\::set_$sub"} = sub {
59 $_[0]->set_property ($type, $idx, $_[1]);
60 } unless $ignore_set{$prop};
61 }
62}
63
64# auto-generate most of the API
65
66prop_gen OBJECT_PROP => "cf::object";
67# CFAPI_OBJECT_ANIMATION?
68prop_gen PLAYER_PROP => "cf::object::player";
69
70prop_gen MAP_PROP => "cf::map";
71prop_gen ARCH_PROP => "cf::arch";
72
73@safe::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object'; 84@safe::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object';
74 85
75# we bless all objects into (empty) derived classes to force a method lookup 86# we bless all objects into (empty) derived classes to force a method lookup
76# within the Safe compartment. 87# within the Safe compartment.
77for my $pkg (qw(cf::object cf::object::player cf::player cf::map cf::party cf::region cf::arch)) { 88for my $pkg (qw(
89 cf::global
90 cf::object cf::object::player
91 cf::client cf::player
92 cf::arch cf::living
93 cf::map cf::party cf::region
94)) {
78 no strict 'refs'; 95 no strict 'refs';
79 @{"safe::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg; 96 @{"safe::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;
80} 97}
81 98
82$Event::DIED = sub { 99$Event::DIED = sub {
84}; 101};
85 102
86my %ext_pkg; 103my %ext_pkg;
87my @exts; 104my @exts;
88my @hook; 105my @hook;
89my %command;
90my %extcmd;
91 106
92############################################################################# 107=head2 UTILITY FUNCTIONS
93# utility functions 108
109=over 4
110
111=cut
94 112
95use JSON::Syck (); # TODO# replace by JSON::PC once working 113use JSON::Syck (); # TODO# replace by JSON::PC once working
114
115=item $ref = cf::from_json $json
116
117Converts a JSON string into the corresponding perl data structure.
118
119=cut
96 120
97sub from_json($) { 121sub from_json($) {
98 $JSON::Syck::ImplicitUnicode = 1; # work around JSON::Syck bugs 122 $JSON::Syck::ImplicitUnicode = 1; # work around JSON::Syck bugs
99 JSON::Syck::Load $_[0] 123 JSON::Syck::Load $_[0]
100} 124}
101 125
126=item $json = cf::to_json $ref
127
128Converts a perl data structure into its JSON representation.
129
130=cut
131
102sub to_json($) { 132sub to_json($) {
103 $JSON::Syck::ImplicitUnicode = 0; # work around JSON::Syck bugs 133 $JSON::Syck::ImplicitUnicode = 0; # work around JSON::Syck bugs
104 JSON::Syck::Dump $_[0] 134 JSON::Syck::Dump $_[0]
105} 135}
106 136
137=back
138
139=cut
140
107############################################################################# 141#############################################################################
108# "new" plug-in system
109 142
110=item $object->attach ($attachment, ...) 143=head2 ATTACHABLE OBJECTS
111 144
112Attach a pre-registered attachment to an object. 145Many objects in crossfire are so-called attachable objects. That means you can
146attach callbacks/event handlers (a collection of which is called an "attachment")
147to it. All such attachable objects support the following methods.
113 148
114=item $player->attach ($attachment, ...) 149In the following description, CLASS can be any of C<global>, C<object>
150C<player>, C<client> or C<map> (i.e. the attachable objects in
151crossfire+).
115 152
116Attach a pre-registered attachment to a player. 153=over 4
117 154
118=item $map->attach ($attachment, ...) # not yet persistent 155=item $attachable->attach ($attachment, key => $value...)
119 156
120Attach a pre-registered attachment to a map. 157=item $attachable->detach ($attachment)
121 158
122=item cf::attach_global ... 159Attach/detach a pre-registered attachment to a specific object and give it
160the specified key/value pairs as arguments.
123 161
124Attach handlers for global events. 162Example, attach a minesweeper attachment to the given object, making it a
16310x10 minesweeper game:
125 164
126This and all following C<attach_*>-functions expect any number of the 165 $obj->attach (minesweeper => width => 10, height => 10);
127following handler/hook descriptions: 166
167=item $bool = $attachable->attached ($name)
168
169Checks wether the named attachment is currently attached to the object.
170
171=item cf::CLASS->attach ...
172
173=item cf::CLASS->detach ...
174
175Define an anonymous attachment and attach it to all objects of the given
176CLASS. See the next function for an explanation of its arguments.
177
178You can attach to global events by using the C<cf::global> class.
179
180Example, log all player logins:
181
182 cf::player->attach (
183 on_login => sub {
184 my ($pl) = @_;
185 ...
186 },
187 );
188
189Example, attach to the jeweler skill:
190
191 cf::object->attach (
192 type => cf::SKILL,
193 subtype => cf::SK_JEWELER,
194 on_use_skill => sub {
195 my ($sk, $ob, $part, $dir, $msg) = @_;
196 ...
197 },
198 );
199
200=item cf::CLASS::attachment $name, ...
201
202Register an attachment by C<$name> through which attachable objects of the
203given CLASS can refer to this attachment.
204
205Some classes such as crossfire maps and objects can specify attachments
206that are attached at load/instantiate time, thus the need for a name.
207
208These calls expect any number of the following handler/hook descriptions:
128 209
129=over 4 210=over 4
130 211
131=item prio => $number 212=item prio => $number
132 213
134by another C<prio> setting). Lower priority handlers get executed 215by another C<prio> setting). Lower priority handlers get executed
135earlier. The default priority is C<0>, and many built-in handlers are 216earlier. The default priority is C<0>, and many built-in handlers are
136registered at priority C<-1000>, so lower priorities should not be used 217registered at priority C<-1000>, so lower priorities should not be used
137unless you know what you are doing. 218unless you know what you are doing.
138 219
220=item type => $type
221
222(Only for C<< cf::object->attach >> calls), limits the attachment to the
223given type of objects only (the additional parameter C<subtype> can be
224used to further limit to the given subtype).
225
139=item on_I<event> => \&cb 226=item on_I<event> => \&cb
140 227
141Call the given code reference whenever the named event happens (event is 228Call the given code reference whenever the named event happens (event is
142something like C<instantiate>, C<apply>, C<use_skill> and so on, and which 229something like C<instantiate>, C<apply>, C<use_skill> and so on, and which
143handlers are recognised generally depends on the type of object these 230handlers are recognised generally depends on the type of object these
152package and register them. Only handlers for eevents supported by the 239package and register them. Only handlers for eevents supported by the
153object/class are recognised. 240object/class are recognised.
154 241
155=back 242=back
156 243
157=item cf::attach_to_type $object_type, $subtype, ... 244Example, define an attachment called "sockpuppet" that calls the given
245event handler when a monster attacks:
158 246
159Attach handlers for a specific object type (e.g. TRANSPORT) and 247 cf::object::attachment sockpuppet =>
160subtype. If C<$subtype> is zero or undef, matches all objects of the given 248 on_skill_attack => sub {
161type. 249 my ($self, $victim) = @_;
162 250 ...
163=item cf::attach_to_objects ... 251 }
164 252 }
165Attach handlers to all objects. Do not use this except for debugging or
166very rare events, as handlers are (obviously) called for I<all> objects in
167the game.
168
169=item cf::attach_to_players ...
170
171Attach handlers to all players.
172
173=item cf::attach_to_maps ...
174
175Attach handlers to all maps.
176
177=item cf:register_attachment $name, ...
178 253
179=cut 254=cut
180 255
181# the following variables are defined in .xs and must not be re-created 256# the following variables are defined in .xs and must not be re-created
182our @CB_GLOBAL = (); # registry for all global events 257our @CB_GLOBAL = (); # registry for all global events
183our @CB_OBJECT = (); # all objects (should not be used except in emergency) 258our @CB_OBJECT = (); # all objects (should not be used except in emergency)
184our @CB_PLAYER = (); 259our @CB_PLAYER = ();
260our @CB_CLIENT = ();
185our @CB_TYPE = (); # registry for type (cf-object class) based events 261our @CB_TYPE = (); # registry for type (cf-object class) based events
186our @CB_MAP = (); 262our @CB_MAP = ();
187 263
188my %attachment; 264my %attachment;
189 265
190sub _attach_cb($\%$$$) { 266sub _attach_cb($$$$) {
191 my ($registry, $undo, $event, $prio, $cb) = @_; 267 my ($registry, $event, $prio, $cb) = @_;
192 268
193 use sort 'stable'; 269 use sort 'stable';
194 270
195 $cb = [$prio, $cb]; 271 $cb = [$prio, $cb];
196 272
197 @{$registry->[$event]} = sort 273 @{$registry->[$event]} = sort
198 { $a->[0] cmp $b->[0] } 274 { $a->[0] cmp $b->[0] }
199 @{$registry->[$event] || []}, $cb; 275 @{$registry->[$event] || []}, $cb;
200
201 push @{$undo->{cb}}, [$event, $cb];
202} 276}
203 277
204# attach handles attaching event callbacks 278# attach handles attaching event callbacks
205# the only thing the caller has to do is pass the correct 279# the only thing the caller has to do is pass the correct
206# registry (== where the callback attaches to). 280# registry (== where the callback attaches to).
207sub _attach(\@$@) { 281sub _attach {
208 my ($registry, $klass, @arg) = @_; 282 my ($registry, $klass, @arg) = @_;
209 283
284 my $object_type;
210 my $prio = 0; 285 my $prio = 0;
211
212 my %undo = (
213 registry => $registry,
214 cb => [],
215 );
216
217 my %cb_id = map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == $klass, 0 .. $#EVENT; 286 my %cb_id = map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == $klass, 0 .. $#EVENT;
218 287
219 while (@arg) { 288 while (@arg) {
220 my $type = shift @arg; 289 my $type = shift @arg;
221 290
222 if ($type eq "prio") { 291 if ($type eq "prio") {
223 $prio = shift @arg; 292 $prio = shift @arg;
224 293
294 } elsif ($type eq "type") {
295 $object_type = shift @arg;
296 $registry = $CB_TYPE[$object_type] ||= [];
297
298 } elsif ($type eq "subtype") {
299 defined $object_type or Carp::croak "subtype specified without type";
300 my $object_subtype = shift @arg;
301 $registry = $CB_TYPE[$object_type + $object_subtype * NUM_SUBTYPES] ||= [];
302
225 } elsif ($type eq "package") { 303 } elsif ($type eq "package") {
226 my $pkg = shift @arg; 304 my $pkg = shift @arg;
227 305
228 while (my ($name, $id) = each %cb_id) { 306 while (my ($name, $id) = each %cb_id) {
229 if (my $cb = $pkg->can ($name)) { 307 if (my $cb = $pkg->can ($name)) {
230 _attach_cb $registry, %undo, $id, $prio, $cb; 308 _attach_cb $registry, $id, $prio, $cb;
231 } 309 }
232 } 310 }
233 311
234 } elsif (exists $cb_id{$type}) { 312 } elsif (exists $cb_id{$type}) {
235 _attach_cb $registry, %undo, $cb_id{$type}, $prio, shift @arg; 313 _attach_cb $registry, $cb_id{$type}, $prio, shift @arg;
236 314
237 } elsif (ref $type) { 315 } elsif (ref $type) {
238 warn "attaching objects not supported, ignoring.\n"; 316 warn "attaching objects not supported, ignoring.\n";
239 317
240 } else { 318 } else {
241 shift @arg; 319 shift @arg;
242 warn "attach argument '$type' not supported, ignoring.\n"; 320 warn "attach argument '$type' not supported, ignoring.\n";
243 } 321 }
244 } 322 }
245
246 \%undo
247} 323}
248 324
249sub _attach_attachment { 325sub _object_attach {
250 my ($obj, $name, @args) = @_; 326 my ($obj, $name, %arg) = @_;
251 327
252 my $res; 328 return if exists $obj->{_attachment}{$name};
253 329
254 if (my $attach = $attachment{$name}) { 330 if (my $attach = $attachment{$name}) {
255 my $registry = $obj->registry; 331 my $registry = $obj->registry;
256 332
257 for (@$attach) { 333 for (@$attach) {
258 my ($klass, @attach) = @$_; 334 my ($klass, @attach) = @$_;
259 $res = _attach @$registry, $klass, @attach; 335 _attach $registry, $klass, @attach;
260 }
261
262 if (my $cb = delete $registry->[EVENT_OBJECT_INSTANTIATE]) {
263 for (@$cb) {
264 eval { $_->[1]->($obj, @args); };
265 if ($@) {
266 warn "$@";
267 warn "... while processing '$name' instantiate with args <@args>.\n";
268 }
269 } 336 }
270 } 337
338 $obj->{$name} = \%arg;
271 } else { 339 } else {
272 warn "object uses attachment '$name' that is not available, postponing.\n"; 340 warn "object uses attachment '$name' that is not available, postponing.\n";
273 } 341 }
274 342
275 push @{$obj->{_attachment}}, $name; 343 $obj->{_attachment}{$name} = undef;
276
277 $res->{attachment} = $name;
278 $res
279} 344}
280 345
281sub cf::object::attach { 346sub cf::attachable::attach {
347 if (ref $_[0]) {
348 _object_attach @_;
349 } else {
350 _attach shift->_attach_registry, @_;
351 }
352};
353
354# all those should be optimised
355sub cf::attachable::detach {
282 my ($obj, $name, @args) = @_; 356 my ($obj, $name) = @_;
283 357
284 _attach_attachment $obj, $name, @args; 358 if (ref $obj) {
285} 359 delete $obj->{_attachment}{$name};
360 reattach ($obj);
361 } else {
362 Carp::croak "cannot, currently, detach class attachments";
363 }
364};
286 365
287sub cf::player::attach { 366sub cf::attachable::attached {
288 my ($obj, $name, @args) = @_; 367 my ($obj, $name) = @_;
289 368
290 _attach_attachment KLASS_PLAYER, $obj, $name, @args; 369 exists $obj->{_attachment}{$name}
291} 370}
292 371
293sub cf::map::attach { 372for my $klass (qw(GLOBAL OBJECT PLAYER CLIENT MAP)) {
294 my ($obj, $name, @args) = @_; 373 eval "#line " . __LINE__ . " 'cf.pm'
374 sub cf::\L$klass\E::_attach_registry {
375 (\\\@CB_$klass, KLASS_$klass)
376 }
295 377
296 _attach_attachment KLASS_MAP, $obj, $name, @args; 378 sub cf::\L$klass\E::attachment {
297}
298
299sub attach_global {
300 _attach @CB_GLOBAL, KLASS_GLOBAL, @_
301}
302
303sub attach_to_type {
304 my $type = shift;
305 my $subtype = shift;
306
307 _attach @{$CB_TYPE[$type + $subtype * NUM_SUBTYPES]}, KLASS_OBJECT, @_
308}
309
310sub attach_to_objects {
311 _attach @CB_OBJECT, KLASS_OBJECT, @_
312}
313
314sub attach_to_players {
315 _attach @CB_PLAYER, KLASS_PLAYER, @_
316}
317
318sub attach_to_maps {
319 _attach @CB_MAP, KLASS_MAP, @_
320}
321
322sub register_attachment {
323 my $name = shift; 379 my \$name = shift;
324 380
325 $attachment{$name} = [[KLASS_OBJECT, @_]]; 381 \$attachment{\$name} = [[KLASS_$klass, \@_]];
382 }
383 ";
384 die if $@;
326} 385}
327 386
328our $override; 387our $override;
329our @invoke_results = (); # referenced from .xs code. TODO: play tricks with reify and mortals? 388our @invoke_results = (); # referenced from .xs code. TODO: play tricks with reify and mortals?
330 389
344 for (@$callbacks) { 403 for (@$callbacks) {
345 eval { &{$_->[1]} }; 404 eval { &{$_->[1]} };
346 405
347 if ($@) { 406 if ($@) {
348 warn "$@"; 407 warn "$@";
349 warn "... while processing $EVENT[$event][0] event, skipping processing altogether.\n"; 408 warn "... while processing $EVENT[$event][0](@_) event, skipping processing altogether.\n";
350 override; 409 override;
351 } 410 }
352 411
353 return 1 if $override; 412 return 1 if $override;
354 } 413 }
355 414
356 0 415 0
357} 416}
417
418=item $bool = cf::invoke EVENT_GLOBAL_XXX, ...
419
420=item $bool = $object->invoke (EVENT_OBJECT_XXX, ...)
421
422=item $bool = $player->invoke (EVENT_PLAYER_XXX, ...)
423
424=item $bool = $client->invoke (EVENT_CLIENT_XXX, ...)
425
426=item $bool = $map->invoke (EVENT_MAP_XXX, ...)
427
428Generate a global/object/player/map-specific event with the given arguments.
429
430This API is preliminary (most likely, the EVENT_KLASS_xxx prefix will be
431removed in future versions), and there is no public API to access override
432results (if you must, access C<@cf::invoke_results> directly).
433
434=back
435
436=cut
437
438#############################################################################
439
440=head2 METHODS VALID FOR ALL ATTACHABLE OBJECTS
441
442Attachable objects includes objects, players, clients and maps.
443
444=over 4
445
446=item $object->valid
447
448Just because you have a perl object does not mean that the corresponding
449C-level object still exists. If you try to access an object that has no
450valid C counterpart anymore you get an exception at runtime. This method
451can be used to test for existence of the C object part without causing an
452exception.
453
454=back
455
456=cut
358 457
359############################################################################# 458#############################################################################
360# object support 459# object support
361 460
362sub instantiate { 461sub instantiate {
364 463
365 $data = from_json $data; 464 $data = from_json $data;
366 465
367 for (@$data) { 466 for (@$data) {
368 my ($name, $args) = @$_; 467 my ($name, $args) = @$_;
369 attach $obj, $name, @{$args || [] }; 468
469 $obj->attach ($name, %{$args || {} });
370 } 470 }
371} 471}
372 472
373# basically do the same as instantiate, without calling instantiate 473# basically do the same as instantiate, without calling instantiate
374sub reattach { 474sub reattach {
375 my ($obj) = @_; 475 my ($obj) = @_;
376 my $registry = $obj->registry; 476 my $registry = $obj->registry;
377 477
378 @$registry = (); 478 @$registry = ();
379 479
480 delete $obj->{_attachment} unless scalar keys %{ $obj->{_attachment} || {} };
481
380 for my $name (@{ $obj->{_attachment} }) { 482 for my $name (keys %{ $obj->{_attachment} || {} }) {
381 if (my $attach = $attachment{$name}) { 483 if (my $attach = $attachment{$name}) {
382 for (@$attach) { 484 for (@$attach) {
383 my ($klass, @attach) = @$_; 485 my ($klass, @attach) = @$_;
384 _attach @$registry, $klass, @attach; 486 _attach $registry, $klass, @attach;
385 } 487 }
386 } else { 488 } else {
387 warn "object uses attachment '$name' that is not available, postponing.\n"; 489 warn "object uses attachment '$name' that is not available, postponing.\n";
388 } 490 }
389 } 491 }
390} 492}
391 493
392sub object_freezer_save { 494sub object_freezer_save {
393 my ($filename, $objs) = @_; 495 my ($filename, $rdata, $objs) = @_;
394 496
395 $filename .= ".pst"; 497 if (length $$rdata) {
498 warn sprintf "saving %s (%d,%d)\n",
499 $filename, length $$rdata, scalar @$objs;
396 500
397 if (@$objs) {
398 open my $fh, ">:raw", "$filename~"; 501 if (open my $fh, ">:raw", "$filename~") {
399 chmod $fh, SAVE_MODE; 502 chmod SAVE_MODE, $fh;
503 syswrite $fh, $$rdata;
504 close $fh;
505
506 if (@$objs && open my $fh, ">:raw", "$filename.pst~") {
507 chmod SAVE_MODE, $fh;
400 syswrite $fh, Storable::nfreeze { version => 1, objs => $objs }; 508 syswrite $fh, Storable::nfreeze { version => 1, objs => $objs };
401 close $fh; 509 close $fh;
510 rename "$filename.pst~", "$filename.pst";
511 } else {
512 unlink "$filename.pst";
513 }
514
402 rename "$filename~", $filename; 515 rename "$filename~", $filename;
516 } else {
517 warn "FATAL: $filename~: $!\n";
518 }
403 } else { 519 } else {
404 unlink $filename; 520 unlink $filename;
521 unlink "$filename.pst";
405 } 522 }
523}
524
525sub object_freezer_as_string {
526 my ($rdata, $objs) = @_;
527
528 use Data::Dumper;
529
530 $$rdata . Dumper $objs
406} 531}
407 532
408sub object_thawer_load { 533sub object_thawer_load {
409 my ($filename) = @_; 534 my ($filename) = @_;
410 535
536 local $/;
537
538 my $av;
539
540 #TODO: use sysread etc.
541 if (open my $data, "<:raw:perlio", $filename) {
542 $data = <$data>;
411 open my $fh, "<:raw:perlio", "$filename.pst" 543 if (open my $pst, "<:raw:perlio", "$filename.pst") {
412 or return; 544 $av = eval { (Storable::thaw <$pst>)->{objs} };
545 }
546 return ($data, $av);
547 }
413 548
414 eval { local $/; (Storable::thaw <$fh>)->{objs} } 549 ()
415} 550}
416 551
417attach_to_objects 552cf::object->attach (
418 prio => -1000000, 553 prio => -1000000,
419 on_clone => sub { 554 on_clone => sub {
420 my ($src, $dst) = @_; 555 my ($src, $dst) = @_;
421 556
422 @{$dst->registry} = @{$src->registry}; 557 @{$dst->registry} = @{$src->registry};
423 558
424 %$dst = %$src; 559 %$dst = %$src;
425 560
426 $dst->{_attachment} = [@{ $src->{_attachment} }] 561 %{$dst->{_attachment}} = %{$src->{_attachment}}
427 if exists $src->{_attachment}; 562 if exists $src->{_attachment};
428 }, 563 },
429; 564);
430 565
431############################################################################# 566#############################################################################
432# old plug-in events 567# command handling &c
433 568
434sub inject_event { 569=item cf::register_command $name => \&callback($ob,$args);
435 my $extension = shift;
436 my $event_code = shift;
437 570
438 my $cb = $hook[$event_code]{$extension} 571Register a callback for execution when the client sends the user command
439 or return; 572$name.
440 573
441 &$cb 574=cut
442}
443
444sub inject_global_event {
445 my $event = shift;
446
447 my $cb = $hook[$event]
448 or return;
449
450 List::Util::max map &$_, values %$cb
451}
452
453sub inject_command {
454 my ($name, $obj, $params) = @_;
455
456 for my $cmd (@{ $command{$name} }) {
457 $cmd->[1]->($obj, $params);
458 }
459
460 -1
461}
462 575
463sub register_command { 576sub register_command {
464 my ($name, $time, $cb) = @_; 577 my ($name, $cb) = @_;
465 578
466 my $caller = caller; 579 my $caller = caller;
467 #warn "registering command '$name/$time' to '$caller'"; 580 #warn "registering command '$name/$time' to '$caller'";
468 581
469 push @{ $command{$name} }, [$time, $cb, $caller]; 582 push @{ $COMMAND{$name} }, [$caller, $cb];
470 $COMMAND{"$name\000"} = List::Util::max map $_->[0], @{ $command{$name} };
471} 583}
584
585=item cf::register_extcmd $name => \&callback($pl,$packet);
586
587Register a callbackf ro execution when the client sends an extcmd packet.
588
589If the callback returns something, it is sent back as if reply was being
590called.
591
592=cut
472 593
473sub register_extcmd { 594sub register_extcmd {
474 my ($name, $cb) = @_; 595 my ($name, $cb) = @_;
475 596
476 my $caller = caller; 597 my $caller = caller;
477 #warn "registering extcmd '$name' to '$caller'"; 598 #warn "registering extcmd '$name' to '$caller'";
478 599
479 $extcmd{$name} = [$cb, $caller]; 600 $EXTCMD{$name} = [$cb, $caller];
480} 601}
602
603cf::player->attach (
604 on_command => sub {
605 my ($pl, $name, $params) = @_;
606
607 my $cb = $COMMAND{$name}
608 or return;
609
610 for my $cmd (@$cb) {
611 $cmd->[1]->($pl->ob, $params);
612 }
613
614 cf::override;
615 },
616 on_extcmd => sub {
617 my ($pl, $buf) = @_;
618
619 my $msg = eval { from_json $buf };
620
621 if (ref $msg) {
622 if (my $cb = $EXTCMD{$msg->{msgtype}}) {
623 if (my %reply = $cb->[0]->($pl, $msg)) {
624 $pl->ext_reply ($msg->{msgid}, %reply);
625 }
626 }
627 } else {
628 warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";
629 }
630
631 cf::override;
632 },
633);
481 634
482sub register { 635sub register {
483 my ($base, $pkg) = @_; 636 my ($base, $pkg) = @_;
484 637
485 #TODO 638 #TODO
504 . "#line 1 \"$path\"\n{\n" 657 . "#line 1 \"$path\"\n{\n"
505 . (do { local $/; <$fh> }) 658 . (do { local $/; <$fh> })
506 . "\n};\n1"; 659 . "\n};\n1";
507 660
508 eval $source 661 eval $source
509 or die "$path: $@"; 662 or die $@ ? "$path: $@\n"
663 : "extension disabled.\n";
510 664
511 push @exts, $pkg; 665 push @exts, $pkg;
512 $ext_pkg{$base} = $pkg; 666 $ext_pkg{$base} = $pkg;
513 667
514# no strict 'refs'; 668# no strict 'refs';
527# for my $idx (0 .. $#PLUGIN_EVENT) { 681# for my $idx (0 .. $#PLUGIN_EVENT) {
528# delete $hook[$idx]{$pkg}; 682# delete $hook[$idx]{$pkg};
529# } 683# }
530 684
531 # remove commands 685 # remove commands
532 for my $name (keys %command) { 686 for my $name (keys %COMMAND) {
533 my @cb = grep $_->[2] ne $pkg, @{ $command{$name} }; 687 my @cb = grep $_->[0] ne $pkg, @{ $COMMAND{$name} };
534 688
535 if (@cb) { 689 if (@cb) {
536 $command{$name} = \@cb; 690 $COMMAND{$name} = \@cb;
537 $COMMAND{"$name\000"} = List::Util::max map $_->[0], @cb;
538 } else { 691 } else {
539 delete $command{$name};
540 delete $COMMAND{"$name\000"}; 692 delete $COMMAND{$name};
541 } 693 }
542 } 694 }
543 695
544 # remove extcmds 696 # remove extcmds
545 for my $name (grep $extcmd{$_}[1] eq $pkg, keys %extcmd) { 697 for my $name (grep $EXTCMD{$_}[1] eq $pkg, keys %EXTCMD) {
546 delete $extcmd{$name}; 698 delete $EXTCMD{$name};
547 } 699 }
548 700
549 if (my $cb = $pkg->can ("unload")) { 701 if (my $cb = $pkg->can ("unload")) {
550 eval { 702 eval {
551 $cb->($pkg); 703 $cb->($pkg);
555 707
556 Symbol::delete_package $pkg; 708 Symbol::delete_package $pkg;
557} 709}
558 710
559sub load_extensions { 711sub load_extensions {
560 my $LIBDIR = maps_directory "perl";
561
562 for my $ext (<$LIBDIR/*.ext>) { 712 for my $ext (<$LIBDIR/*.ext>) {
563 next unless -r $ext; 713 next unless -r $ext;
564 eval { 714 eval {
565 load_extension $ext; 715 load_extension $ext;
566 1 716 1
567 } or warn "$ext not loaded: $@"; 717 } or warn "$ext not loaded: $@";
568 } 718 }
569} 719}
570 720
571sub _perl_reload(&) {
572 my ($msg) = @_;
573
574 $msg->("reloading...");
575
576 eval {
577 # 1. cancel all watchers
578 $_->cancel for Event::all_watchers;
579
580 # 2. unload all extensions
581 for (@exts) {
582 $msg->("unloading <$_>");
583 unload_extension $_;
584 }
585
586 # 3. unload all modules loaded from $LIBDIR
587 while (my ($k, $v) = each %INC) {
588 next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;
589
590 $msg->("removing <$k>");
591 delete $INC{$k};
592
593 $k =~ s/\.pm$//;
594 $k =~ s/\//::/g;
595
596 if (my $cb = $k->can ("unload_module")) {
597 $cb->();
598 }
599
600 Symbol::delete_package $k;
601 }
602
603 # 4. get rid of safe::, as good as possible
604 Symbol::delete_package "safe::$_"
605 for qw(cf::object cf::object::player cf::player cf::map cf::party cf::region);
606
607 # 5. remove register_script_function callbacks
608 # TODO
609
610 # 6. unload cf.pm "a bit"
611 delete $INC{"cf.pm"};
612
613 # don't, removes xs symbols, too,
614 # and global variables created in xs
615 #Symbol::delete_package __PACKAGE__;
616
617 # 7. reload cf.pm
618 $msg->("reloading cf.pm");
619 require cf;
620 };
621 $msg->($@) if $@;
622
623 $msg->("reloaded");
624};
625
626sub perl_reload() {
627 _perl_reload {
628 warn $_[0];
629 print "$_[0]\n";
630 };
631}
632
633register_command "perl-reload", 0, sub {
634 my ($who, $arg) = @_;
635
636 if ($who->flag (FLAG_WIZ)) {
637 _perl_reload {
638 warn $_[0];
639 $who->message ($_[0]);
640 };
641 }
642};
643
644#############################################################################
645# extcmd framework, basically convert ext <msg>
646# into pkg::->on_extcmd_arg1 (...) while shortcutting a few
647
648attach_to_players
649 on_extcmd => sub {
650 my ($pl, $buf) = @_;
651
652 my $msg = eval { from_json $buf };
653
654 if (ref $msg) {
655 if (my $cb = $extcmd{$msg->{msgtype}}) {
656 if (my %reply = $cb->[0]->($pl, $msg)) {
657 $pl->ext_reply ($msg->{msgid}, %reply);
658 }
659 }
660 } else {
661 warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";
662 }
663
664 cf::override;
665 },
666;
667
668############################################################################# 721#############################################################################
669# load/save/clean perl data associated with a map 722# load/save/clean perl data associated with a map
670 723
671*cf::mapsupport::on_clean = sub { 724*cf::mapsupport::on_clean = sub {
672 my ($map) = @_; 725 my ($map) = @_;
673 726
674 my $path = $map->tmpname; 727 my $path = $map->tmpname;
675 defined $path or return; 728 defined $path or return;
676 729
677 unlink "$path.cfperl";
678 unlink "$path.pst"; 730 unlink "$path.pst";
679}; 731};
680 732
681*cf::mapsupport::on_swapin =
682*cf::mapsupport::on_load = sub {
683 my ($map) = @_;
684
685 my $path = $map->tmpname;
686 $path = $map->path unless defined $path;
687
688 open my $fh, "<:raw", "$path.cfperl"
689 or return; # no perl data
690
691 my $data = Storable::thaw do { local $/; <$fh> };
692
693 $data->{version} <= 1
694 or return; # too new
695
696 $map->_set_obs ($data->{obs});
697};
698
699attach_to_maps prio => -10000, package => cf::mapsupport::; 733cf::map->attach (prio => -10000, package => cf::mapsupport::);
700 734
701############################################################################# 735#############################################################################
702# load/save perl data associated with player->ob objects 736# load/save perl data associated with player->ob objects
703 737
704sub all_objects(@) { 738sub all_objects(@) {
705 @_, map all_objects ($_->inv), @_ 739 @_, map all_objects ($_->inv), @_
706} 740}
707 741
708attach_to_players 742# TODO: compatibility cruft, remove when no longer needed
743cf::player->attach (
709 on_load => sub { 744 on_load => sub {
710 my ($pl, $path) = @_; 745 my ($pl, $path) = @_;
711 746
712 for my $o (all_objects $pl->ob) { 747 for my $o (all_objects $pl->ob) {
713 if (my $value = $o->get_ob_key_value ("_perl_data")) { 748 if (my $value = $o->get_ob_key_value ("_perl_data")) {
715 750
716 %$o = %{ Storable::thaw pack "H*", $value }; 751 %$o = %{ Storable::thaw pack "H*", $value };
717 } 752 }
718 } 753 }
719 }, 754 },
720; 755);
721 756
722############################################################################# 757#############################################################################
723# core extensions - in perl 758
759=head2 CORE EXTENSIONS
760
761Functions and methods that extend core crossfire objects.
762
763=over 4
724 764
725=item cf::player::exists $login 765=item cf::player::exists $login
726 766
727Returns true when the given account exists. 767Returns true when the given account exists.
728 768
731sub cf::player::exists($) { 771sub cf::player::exists($) {
732 cf::player::find $_[0] 772 cf::player::find $_[0]
733 or -f sprintf "%s/%s/%s/%s.pl", cf::localdir, cf::playerdir, ($_[0]) x 2; 773 or -f sprintf "%s/%s/%s/%s.pl", cf::localdir, cf::playerdir, ($_[0]) x 2;
734} 774}
735 775
736=item $player->reply ($npc, $msg[, $flags]) 776=item $player_object->reply ($npc, $msg[, $flags])
737 777
738Sends a message to the player, as if the npc C<$npc> replied. C<$npc> 778Sends a message to the player, as if the npc C<$npc> replied. C<$npc>
739can be C<undef>. Does the right thing when the player is currently in a 779can be C<undef>. Does the right thing when the player is currently in a
740dialogue with the given NPC character. 780dialogue with the given NPC character.
741 781
768 $msg{msgid} = $id; 808 $msg{msgid} = $id;
769 809
770 $self->send ("ext " . to_json \%msg); 810 $self->send ("ext " . to_json \%msg);
771} 811}
772 812
813=item $player_object->may ("access")
814
815Returns wether the given player is authorized to access resource "access"
816(e.g. "command_wizcast").
817
818=cut
819
820sub cf::object::player::may {
821 my ($self, $access) = @_;
822
823 $self->flag (cf::FLAG_WIZ) ||
824 (ref $cf::CFG{"may_$access"}
825 ? scalar grep $self->name eq $_, @{$cf::CFG{"may_$access"}}
826 : $cf::CFG{"may_$access"})
827}
828
829=cut
830
773############################################################################# 831#############################################################################
774# map scripting support 832
833=head2 SAFE SCRIPTING
834
835Functions that provide a safe environment to compile and execute
836snippets of perl code without them endangering the safety of the server
837itself. Looping constructs, I/O operators and other built-in functionality
838is not available in the safe scripting environment, and the number of
839functions and methods that can be called is greatly reduced.
840
841=cut
775 842
776our $safe = new Safe "safe"; 843our $safe = new Safe "safe";
777our $safe_hole = new Safe::Hole; 844our $safe_hole = new Safe::Hole;
778 845
779$SIG{FPE} = 'IGNORE'; 846$SIG{FPE} = 'IGNORE';
780 847
781$safe->permit_only (Opcode::opset qw(:base_core :base_mem :base_orig :base_math sort time)); 848$safe->permit_only (Opcode::opset qw(:base_core :base_mem :base_orig :base_math sort time));
782 849
783# here we export the classes and methods available to script code 850# here we export the classes and methods available to script code
784 851
852=pod
853
854The following fucntions and emthods are available within a safe environment:
855
856 cf::object contr pay_amount pay_player map
857 cf::object::player player
858 cf::player peaceful
859 cf::map trigger
860
861=cut
862
785for ( 863for (
786 ["cf::object" => qw(contr pay_amount pay_player)], 864 ["cf::object" => qw(contr pay_amount pay_player map)],
787 ["cf::object::player" => qw(player)], 865 ["cf::object::player" => qw(player)],
788 ["cf::player" => qw(peaceful)], 866 ["cf::player" => qw(peaceful)],
867 ["cf::map" => qw(trigger)],
789) { 868) {
790 no strict 'refs'; 869 no strict 'refs';
791 my ($pkg, @funs) = @$_; 870 my ($pkg, @funs) = @$_;
792 *{"safe::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"}) 871 *{"safe::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})
793 for @funs; 872 for @funs;
794} 873}
874
875=over 4
876
877=item @retval = safe_eval $code, [var => value, ...]
878
879Compiled and executes the given perl code snippet. additional var/value
880pairs result in temporary local (my) scalar variables of the given name
881that are available in the code snippet. Example:
882
883 my $five = safe_eval '$first + $second', first => 1, second => 4;
884
885=cut
795 886
796sub safe_eval($;@) { 887sub safe_eval($;@) {
797 my ($code, %vars) = @_; 888 my ($code, %vars) = @_;
798 889
799 my $qcode = $code; 890 my $qcode = $code;
822 } 913 }
823 914
824 wantarray ? @res : $res[0] 915 wantarray ? @res : $res[0]
825} 916}
826 917
918=item cf::register_script_function $function => $cb
919
920Register a function that can be called from within map/npc scripts. The
921function should be reasonably secure and should be put into a package name
922like the extension.
923
924Example: register a function that gets called whenever a map script calls
925C<rent::overview>, as used by the C<rent> extension.
926
927 cf::register_script_function "rent::overview" => sub {
928 ...
929 };
930
931=cut
932
827sub register_script_function { 933sub register_script_function {
828 my ($fun, $cb) = @_; 934 my ($fun, $cb) = @_;
829 935
830 no strict 'refs'; 936 no strict 'refs';
831 *{"safe::$fun"} = $safe_hole->wrap ($cb); 937 *{"safe::$fun"} = $safe_hole->wrap ($cb);
832} 938}
833 939
940=back
941
942=cut
943
944#############################################################################
945
946=head2 EXTENSION DATABASE SUPPORT
947
948Crossfire maintains a very simple database for extension use. It can
949currently store anything that can be serialised using Storable, which
950excludes objects.
951
952The parameter C<$family> should best start with the name of the extension
953using it, it should be unique.
954
955=over 4
956
957=item $hashref = cf::db_get $family
958
959Return a hashref for use by the extension C<$family>, which can be
960modified. After modifications, you have to call C<cf::db_dirty> or
961C<cf::db_sync>.
962
963=item $value = cf::db_get $family => $key
964
965Returns a single value from the database
966
967=item cf::db_put $family => $hashref
968
969Stores the given family hashref into the database. Updates are delayed, if
970you want the data to be synced to disk immediately, use C<cf::db_sync>.
971
972=item cf::db_put $family => $key => $value
973
974Stores the given C<$value> in the family hash. Updates are delayed, if you
975want the data to be synced to disk immediately, use C<cf::db_sync>.
976
977=item cf::db_dirty
978
979Marks the database as dirty, to be updated at a later time.
980
981=item cf::db_sync
982
983Immediately write the database to disk I<if it is dirty>.
984
985=cut
986
987our $DB;
988
989{
990 my $path = cf::localdir . "/database.pst";
991
992 sub db_load() {
993 warn "loading database $path\n";#d# remove later
994 $DB = stat $path ? Storable::retrieve $path : { };
995 }
996
997 my $pid;
998
999 sub db_save() {
1000 warn "saving database $path\n";#d# remove later
1001 waitpid $pid, 0 if $pid;
1002 if (0 == ($pid = fork)) {
1003 $DB->{_meta}{version} = 1;
1004 Storable::nstore $DB, "$path~";
1005 rename "$path~", $path;
1006 cf::_exit 0 if defined $pid;
1007 }
1008 }
1009
1010 my $dirty;
1011
1012 sub db_sync() {
1013 db_save if $dirty;
1014 undef $dirty;
1015 }
1016
1017 my $idle = Event->idle (min => $TICK * 2.8, max => 10, repeat => 0, data => WF_AUTOCANCEL, cb => sub {
1018 db_sync;
1019 });
1020
1021 sub db_dirty() {
1022 $dirty = 1;
1023 $idle->start;
1024 }
1025
1026 sub db_get($;$) {
1027 @_ >= 2
1028 ? $DB->{$_[0]}{$_[1]}
1029 : ($DB->{$_[0]} ||= { })
1030 }
1031
1032 sub db_put($$;$) {
1033 if (@_ >= 3) {
1034 $DB->{$_[0]}{$_[1]} = $_[2];
1035 } else {
1036 $DB->{$_[0]} = $_[1];
1037 }
1038 db_dirty;
1039 }
1040
1041 cf::global->attach (
1042 prio => 10000,
1043 on_cleanup => sub {
1044 db_sync;
1045 },
1046 );
1047}
1048
834############################################################################# 1049#############################################################################
835# the server's main() 1050# the server's main()
836 1051
1052sub cfg_load {
1053 open my $fh, "<:utf8", cf::confdir . "/config"
1054 or return;
1055
1056 local $/;
1057 *CFG = YAML::Syck::Load <$fh>;
1058}
1059
837sub main { 1060sub main {
1061 cfg_load;
1062 db_load;
1063 load_extensions;
838 Event::loop; 1064 Event::loop;
839} 1065}
840 1066
841############################################################################# 1067#############################################################################
842# initialisation 1068# initialisation
843 1069
1070sub _perl_reload(&) {
1071 my ($msg) = @_;
1072
1073 $msg->("reloading...");
1074
1075 eval {
1076 # cancel all watchers
1077 for (Event::all_watchers) {
1078 $_->cancel if $_->data & WF_AUTOCANCEL;
1079 }
1080
1081 # unload all extensions
1082 for (@exts) {
1083 $msg->("unloading <$_>");
1084 unload_extension $_;
1085 }
1086
1087 # unload all modules loaded from $LIBDIR
1088 while (my ($k, $v) = each %INC) {
1089 next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;
1090
1091 $msg->("removing <$k>");
1092 delete $INC{$k};
1093
1094 $k =~ s/\.pm$//;
1095 $k =~ s/\//::/g;
1096
1097 if (my $cb = $k->can ("unload_module")) {
1098 $cb->();
1099 }
1100
1101 Symbol::delete_package $k;
1102 }
1103
1104 # sync database to disk
1105 cf::db_sync;
1106
1107 # get rid of safe::, as good as possible
1108 Symbol::delete_package "safe::$_"
1109 for qw(cf::object cf::object::player cf::player cf::map cf::party cf::region);
1110
1111 # remove register_script_function callbacks
1112 # TODO
1113
1114 # unload cf.pm "a bit"
1115 delete $INC{"cf.pm"};
1116
1117 # don't, removes xs symbols, too,
1118 # and global variables created in xs
1119 #Symbol::delete_package __PACKAGE__;
1120
1121 # reload cf.pm
1122 $msg->("reloading cf.pm");
1123 require cf;
1124
1125 # load config and database again
1126 cf::cfg_load;
1127 cf::db_load;
1128
1129 # load extensions
1130 $msg->("load extensions");
1131 cf::load_extensions;
1132
1133 # reattach attachments to objects
1134 $msg->("reattach");
1135 _global_reattach;
1136 };
1137 $msg->($@) if $@;
1138
1139 $msg->("reloaded");
1140};
1141
1142sub perl_reload() {
1143 _perl_reload {
1144 warn $_[0];
1145 print "$_[0]\n";
1146 };
1147}
1148
844register "<global>", __PACKAGE__; 1149register "<global>", __PACKAGE__;
845 1150
1151register_command "perl-reload" => sub {
1152 my ($who, $arg) = @_;
1153
1154 if ($who->flag (FLAG_WIZ)) {
1155 _perl_reload {
1156 warn $_[0];
1157 $who->message ($_[0]);
1158 };
1159 }
1160};
1161
846unshift @INC, $LIBDIR; 1162unshift @INC, $LIBDIR;
847 1163
848load_extensions;
849
850$TICK_WATCHER = Event->timer ( 1164$TICK_WATCHER = Event->timer (
851 prio => 1, 1165 prio => 0,
852 at => $NEXT_TICK || 1, 1166 at => $NEXT_TICK || 1,
1167 data => WF_AUTOCANCEL,
853 cb => sub { 1168 cb => sub {
854 cf::server_tick; # one server iteration 1169 cf::server_tick; # one server iteration
855 1170
856 my $NOW = Event::time; 1171 my $NOW = Event::time;
857 $NEXT_TICK += $TICK; 1172 $NEXT_TICK += $TICK;
858 1173
859 # if we are delayed by four ticks, skip them all 1174 # if we are delayed by four ticks or more, skip them all
860 $NEXT_TICK = $NOW if $NOW >= $NEXT_TICK + $TICK * 4; 1175 $NEXT_TICK = $NOW if $NOW >= $NEXT_TICK + $TICK * 4;
861 1176
862 $TICK_WATCHER->at ($NEXT_TICK); 1177 $TICK_WATCHER->at ($NEXT_TICK);
863 $TICK_WATCHER->start; 1178 $TICK_WATCHER->start;
864 }, 1179 },
865); 1180);
866 1181
867_reload_2; 1182IO::AIO::max_poll_time $TICK * 0.2;
1183
1184Event->io (fd => IO::AIO::poll_fileno,
1185 poll => 'r',
1186 prio => 5,
1187 data => WF_AUTOCANCEL,
1188 cb => \&IO::AIO::poll_cb);
868 1189
8691 11901
870 1191

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