server/ext/00_map_handling.ext

#! perl

# why this is an extension is a good question. next question.

use Fcntl;

use Coro;
use Coro::AIO;

our $emergency_position = $cf::CFG{emergency_position} || ["/world/world_105_115", 5, 37];

our $DEACTIVATE_TIMEOUT =  60; # number of seconds after which maps get deactivated to save cpu
our $SWAP_TIMEOUT       = 600; # number of seconds after which maps inactive get swapped out
our $SCHEDULE_INTERVAL  =   8; # time the map scheduler sleeps between runs
our $SAVE_TIMEOUT       =  60; # save maps every n seconds
our $SAVE_INTERVAL      = 0.4; # save at max. one map every $SAVE_HOLD
our $MAX_RESET          = 7200;

$DEACTIVATE_TIMEOUT = 3;#d#
$SWAP_TIMEOUT = 5;#d#
$SCHEDULE_INTERVAL = 1;

$cf::LINK_MAP ||= do {
   my $map = cf::map::new;

   $map->width (1);
   $map->height (1);
   $map->alloc;
   $map->path ("{link}");
   $map->{path} = bless { path => "{link}" }, "cf::path";
   $map->in_memory (cf::MAP_IN_MEMORY);

   $map
};

{
   package cf::path;

   sub new {
      my ($class, $path, $base) = @_;

      my %res;

      if ($path =~ s{^~([^/]+)?}{}) {
         $res{user_rel} = 1;

         if (defined $1) {
            $res{user} = $1;
         } elsif ($base =~ m{^~([^/]+)/}) {
            $res{user} = $1;
         } else {
            warn "cannot resolve user-relative path without user <$path,$base>\n";
         }
      } elsif ($path =~ /^\//) {
         # already absolute
      } else {
         $base =~ s{[^/]+/?$}{};
         return $class->new ("$base/$path");
      }

      for ($path) {
         redo if s{/\.?/}{/};
         redo if s{/[^/]+/\.\./}{/};
      }

      $res{path} = $path;

      bless \%res, $class
   }

   # the name / primary key / in-game path
   sub as_string {
      my ($self) = @_;

      $self->{user_rel}
         ? "~$self->{user}$self->{path}"
         : $self->{path}
   }

   # escape the /'s in the path
   sub escaped_path  {
      # ∕ is U+2215
      (my $path = $_[0]{path}) =~ s/\//∕/g;
      $path
   }

   # the original (read-only) location
   sub load_path {
      my ($self) = @_;

      sprintf "%s/%s/%s", cf::datadir, cf::mapdir, $self->{path}
   }

   # the temporary/swap location
   sub save_path {
      my ($self) = @_;

      $self->{user_rel}
         ? sprintf "%s/%s/%s/%s", cf::localdir, cf::playerdir, $self->{user}, $self->escaped_path
         : sprintf "%s/%s/%s", cf::localdir, cf::tmpdir, $self->escaped_path
   }

   # the unique path, might be eq to save_path
   sub uniq_path {
      my ($self) = @_;

      $self->{user_rel}
         ? undef
         : sprintf "%s/%s/%s", cf::localdir, cf::uniquedir, $self->escaped_path
   }
}

sub write_runtime {
   my $runtime = cf::localdir . "/runtime";

   my $fh = aio_open "$runtime~", O_WRONLY | O_CREAT, 0644
      or return;

   my $value = $cf::RUNTIME;
   (aio_write $fh, 0, (length $value), $value, 0) <= 0
      and return;

   aio_fsync $fh
      and return;

   close $fh
      or return;

   aio_rename "$runtime~", $runtime
      and return;

   1
}

(Coro::async {
   unless (write_runtime) {
      warn "unable to write runtime file: $!";
      exit 1;
   }
})->prio (Coro::PRIO_MAX);

our $SCHEDULER = cf::coro {
   while () {
      Coro::Timer::sleep $SCHEDULE_INTERVAL;

      write_runtime
         or warn "unable to write runtime file: $!";

      for my $map (values %cf::MAP) {
         eval {
            next if $map->in_memory != cf::MAP_IN_MEMORY;
            my $last_access = $map->last_access;
            # not yet, because maps might become visible to players nearby
            # we need a tiled meta map for this to work
#         if ($last_access + $DEACTIVATE_TIMEOUT <= $cf::RUNTIME) {
#            $map->deactivate;
#            delete $map->{active};
#         }
            if ($map->should_reset) {
               $map->reset;
            } elsif ($last_access + $SWAP_TIMEOUT <= $cf::RUNTIME) {
               $map->swap_out;
               Coro::Timer::sleep $SAVE_INTERVAL;
            } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) {
               $map->save;
               Coro::Timer::sleep $SAVE_INTERVAL;
            }
         };
         warn $@ if $@;
         cede;
      }
   }
};
$SCHEDULER->prio (-2);

sub sync_job(&) {
   my ($job) = @_;

   my $done;
   my @res;

   Carp::confess "nested sync_job" if $cf::FREEZE;

   local $cf::FREEZE = 1;

   (Coro::async {
      @res = eval { $job->() };
      warn $@ if $@;
      $done = 1;
   })->prio (Coro::PRIO_MAX);

   while (!$done) {
      Coro::cede_notself;
      Event::one_event unless Coro::nready;
   }

   wantarray ? @res : $res[0]
}

# and all this just because we cannot iterate over
# all maps in C++...
sub cf::map::change_all_map_light {
   my ($change) = @_;

   $_->change_map_light ($change) for values %cf::MAP;
}

sub try_load_header($) {
   my ($path) = @_;

   utf8::encode $path;
   aio_open $path, O_RDONLY, 0
      or return;

   my $map = cf::map::new
      or return;

   $map->load_header ($path)
     or return;

   $map->reset_time (0) if $map->reset_time > $cf::RUNTIME;
   $map->reset_timeout (10);#d#

   $map->{load_path} = $path;

   $map
}

sub cf::map::find_map_nb {
   my ($path, $origin) = @_;

   warn "find_map_nb<$path,$origin>\n";#d#

   $path = ref $path ? $path : new cf::path $path, $origin && $origin->path;
   my $key = $path->as_string;

   $cf::MAP{$key} || do {
      # do it the slow way
      my $map = try_load_header $path->save_path;

      if (!$map) {
         $map = try_load_header $path->load_path
            or return;
      }

      $map or return;

      $map->instantiate;
      $map->path ($key);
      $map->{path} = $path;

      $map->per_player (0) if $path->{user_rel};

      $map->reset if $map->should_reset;

      $cf::MAP{$key} = $map
   }
}

sub cf::map::find_map {
   my ($path, $origin) = @_;

   $path = new cf::path $path, $origin && $origin->path;
   my $key = $path->as_string;

   warn "find_map<$path,$origin>\n";#d#

   $cf::MAP{$key} || sync_job {
      cf::map::find_map_nb $path;
   }
}

sub cf::map::do_load_nb {
   my ($self) = @_;

   return 0 unless $self->in_memory == cf::MAP_SWAPPED;

   $self->in_memory (cf::MAP_LOADING);

   my $path = $self->{path};

   $self->alloc;
   $self->load_objects ($self->{load_path}, 1)
      or return;

   if (my $uniq = $path->uniq_path) {
      utf8::encode $uniq;
      if (aio_open $uniq, O_RDONLY, 0) {
         $self->clear_unique_items;
         $self->load_objects ($uniq, 0);
      }
   }

   # now do the right thing for maps
   $self->link_multipart_objects;
   $self->fix_auto_apply;
   $self->decay_objects;
   $self->update_buttons;
   $self->set_darkness_map;
   $self->difficulty ($self->estimate_difficulty)
      unless $self->difficulty;
   $self->activate;

   $self->in_memory (cf::MAP_IN_MEMORY);
}

sub cf::map::do_load {
   my ($self) = @_;

   warn "do_load<$self>\n";#d#

   sync_job {
      cf::map::do_load_nb $self;
   };
}

sub cf::map::save {
   my ($self) = @_;

   warn "saving map ", $self->path;

   my $save = $self->{path}->save_path; utf8::encode $save;
   my $uniq = $self->{path}->uniq_path; utf8::encode $uniq;

   if ($uniq) {
      $self->save_objects ($save, cf::IO_HEADER | cf::IO_OBJECTS);
      $self->save_objects ($uniq, cf::IO_UNIQUES);
   } else {
      $self->save_objects ($save, cf::IO_HEADER | cf::IO_OBJECTS | cf::IO_UNIQUES);
   }

   $self->{load_path} = $save;
   $self->{last_save} = $cf::RUNTIME;
}

sub cf::map::swap_out {
   my ($self) = @_;

   $self->save if $self->in_memory == cf::MAP_IN_MEMORY;
   $self->clear;
   $self->in_memory (cf::MAP_SWAPPED);
}

sub cf::map::should_reset {
   my ($map) = @_;

   # TODO: safety, remove and allow resettable per-player maps
   return if $map->{path}{user_rel};#d#
   return if $map->per_player;
   return unless $map->reset_timeout;

   my $time = $map->fixed_resettime ? $map->reset_time : $map->last_access;

   $time + $map->reset_timeout < $cf::RUNTIME
}

sub cf::map::reset {
   my ($self) = @_;

   return if $self->players;
   return if $self->{path}{user_rel};#d#

   warn "resetting map ", $self->path;#d#

   utf8::encode (my $save = $self->{path}->save_path);
   aioreq_pri 3; IO::AIO::aio_unlink $save;
   aioreq_pri 3; IO::AIO::aio_unlink "$save.pst";

   $self->clear;
   $self->in_memory (cf::MAP_SWAPPED);
   utf8::encode ($self->{load_path} = $self->{path}->load_path);
}

sub cf::object::player::enter_exit {
   my ($ob, $exit) = @_;

   # if at login, move to interim map immediately
   unless ($exit) {
      # used on login only
      $ob->enter_map ($LINK_MAP, 0, 0);
   }

   #TODO: do this in the background, freeze the player if required
   sync_job {
      my ($map, $x, $y);

      unless ($exit) {
         # used on login only(?)
         $map = cf::map::find_map_nb $ob->contr->maplevel;
         ($x, $y) = ($ob->x, $ob->y);
      } else {
         my $path = new cf::path $exit->slaying, $exit->map && $exit->map->path;

         $map = cf::map::find_map_nb $path->as_string;
         $map = $map->customise_for ($ob) if $map;
         ($x, $y) = ($exit->stats->hp, $exit->stats->sp);
      }

      unless ($map) {
         $map = cf::map::find_map_nb $emergency_position->[0]
            or die "FATAL: cannot load emergency map\n";
         $x = $emergency_position->[1];
         $y = $emergency_position->[2];
      }

      if ($map) {
         warn "entering ", $map->path, " at ($x, $y)\n";#d#
         $map->do_load_nb;
         $ob->enter_map ($map, $x, $y);
      } else {
         $ob->message ("The exit is closed", cf::NDI_UNIQUE | cf::NDI_RED);
      }
   }
}

sub cf::map::customise_for {
   my ($map, $ob) = @_;

   if ($map->per_player) {
      return cf::map::find_map_nb "~" . $ob->name . "/" . $map->{path}{path};
   }

   $map
}

sub cf::map::emergency_save {
   local $cf::FREEZE = 1;

   warn "enter emergency map save\n";

   my $saver = async {
      warn "begin emergency map save\n";
      $_->save for values %cf::MAP;
   };
   $saver->prio (Coro::PRIO_MAX);
   $saver->join;

   warn "emergency map save drain\n";
   Event::one_event while IO::AIO::nreqs;
   warn "end emergency map save\n";
}

Revision:	1.5
Committed:	Sat Dec 30 17:00:44 2006 UTC (17 years, 4 months ago) by elmex
Branch:	MAIN
Changes since 1.4:	+1 -0 lines
Log Message:	added activate for maps
#	User	Rev	Content
1	root	1.1	#! perl
2
3			# why this is an extension is a good question. next question.
4
5			use Fcntl;
6
7			use Coro;
8			use Coro::AIO;
9
10			our $emergency_position = $cf::CFG{emergency_position} \|\| ["/world/world_105_115", 5, 37];
11
12			our $DEACTIVATE_TIMEOUT = 60; # number of seconds after which maps get deactivated to save cpu
13			our $SWAP_TIMEOUT = 600; # number of seconds after which maps inactive get swapped out
14			our $SCHEDULE_INTERVAL = 8; # time the map scheduler sleeps between runs
15			our $SAVE_TIMEOUT = 60; # save maps every n seconds
16			our $SAVE_INTERVAL = 0.4; # save at max. one map every $SAVE_HOLD
17			our $MAX_RESET = 7200;
18
19			$DEACTIVATE_TIMEOUT = 3;#d#
20			$SWAP_TIMEOUT = 5;#d#
21			$SCHEDULE_INTERVAL = 1;
22
23			$cf::LINK_MAP \|\|= do {
24			my $map = cf::map::new;
25
26			$map->width (1);
27			$map->height (1);
28			$map->alloc;
29			$map->path ("{link}");
30			$map->{path} = bless { path => "{link}" }, "cf::path";
31			$map->in_memory (cf::MAP_IN_MEMORY);
32
33			$map
34			};
35
36			{
37			package cf::path;
38
39			sub new {
40			my ($class, $path, $base) = @_;
41
42			my %res;
43
44			if ($path =~ s{^~([^/]+)?}{}) {
45			$res{user_rel} = 1;
46
47			if (defined $1) {
48			$res{user} = $1;
49			} elsif ($base =~ m{^~([^/]+)/}) {
50			$res{user} = $1;
51			} else {
52			warn "cannot resolve user-relative path without user <$path,$base>\n";
53			}
54			} elsif ($path =~ /^\//) {
55			# already absolute
56			} else {
57			$base =~ s{[^/]+/?$}{};
58			return $class->new ("$base/$path");
59			}
60
61			for ($path) {
62			redo if s{/\.?/}{/};
63			redo if s{/[^/]+/\.\./}{/};
64			}
65
66			$res{path} = $path;
67
68			bless \%res, $class
69			}
70
71			# the name / primary key / in-game path
72			sub as_string {
73			my ($self) = @_;
74
75			$self->{user_rel}
76			? "~$self->{user}$self->{path}"
77			: $self->{path}
78			}
79
80			# escape the /'s in the path
81			sub escaped_path {
82			# ∕ is U+2215
83			(my $path = $_[0]{path}) =~ s/\//∕/g;
84			$path
85			}
86
87			# the original (read-only) location
88			sub load_path {
89			my ($self) = @_;
90
91			sprintf "%s/%s/%s", cf::datadir, cf::mapdir, $self->{path}
92			}
93
94			# the temporary/swap location
95			sub save_path {
96			my ($self) = @_;
97
98			$self->{user_rel}
99			? sprintf "%s/%s/%s/%s", cf::localdir, cf::playerdir, $self->{user}, $self->escaped_path
100			: sprintf "%s/%s/%s", cf::localdir, cf::tmpdir, $self->escaped_path
101			}
102
103			# the unique path, might be eq to save_path
104			sub uniq_path {
105			my ($self) = @_;
106
107			$self->{user_rel}
108			? undef
109			: sprintf "%s/%s/%s", cf::localdir, cf::uniquedir, $self->escaped_path
110			}
111			}
112
113			sub write_runtime {
114			my $runtime = cf::localdir . "/runtime";
115
116			my $fh = aio_open "$runtime~", O_WRONLY \| O_CREAT, 0644
117			or return;
118
119			my $value = $cf::RUNTIME;
120			(aio_write $fh, 0, (length $value), $value, 0) <= 0
121			and return;
122
123			aio_fsync $fh
124			and return;
125
126			close $fh
127			or return;
128
129			aio_rename "$runtime~", $runtime
130			and return;
131
132			1
133			}
134
135	root	1.4	(Coro::async {
136	root	1.1	unless (write_runtime) {
137			warn "unable to write runtime file: $!";
138			exit 1;
139			}
140	root	1.4	})->prio (Coro::PRIO_MAX);
141	root	1.1
142			our $SCHEDULER = cf::coro {
143			while () {
144			Coro::Timer::sleep $SCHEDULE_INTERVAL;
145
146			write_runtime
147			or warn "unable to write runtime file: $!";
148
149			for my $map (values %cf::MAP) {
150			eval {
151			next if $map->in_memory != cf::MAP_IN_MEMORY;
152			my $last_access = $map->last_access;
153			# not yet, because maps might become visible to players nearby
154			# we need a tiled meta map for this to work
155			# if ($last_access + $DEACTIVATE_TIMEOUT <= $cf::RUNTIME) {
156			# $map->deactivate;
157			# delete $map->{active};
158			# }
159			if ($map->should_reset) {
160			$map->reset;
161			} elsif ($last_access + $SWAP_TIMEOUT <= $cf::RUNTIME) {
162			$map->swap_out;
163			Coro::Timer::sleep $SAVE_INTERVAL;
164			} elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) {
165			$map->save;
166			Coro::Timer::sleep $SAVE_INTERVAL;
167			}
168			};
169			warn $@ if $@;
170			cede;
171			}
172			}
173			};
174			$SCHEDULER->prio (-2);
175
176			sub sync_job(&) {
177			my ($job) = @_;
178
179			my $done;
180			my @res;
181
182			Carp::confess "nested sync_job" if $cf::FREEZE;
183
184			local $cf::FREEZE = 1;
185
186	root	1.4	(Coro::async {
187	root	1.1	@res = eval { $job->() };
188			warn $@ if $@;
189			$done = 1;
190			})->prio (Coro::PRIO_MAX);
191
192			while (!$done) {
193			Coro::cede_notself;
194			Event::one_event unless Coro::nready;
195			}
196
197			wantarray ? @res : $res[0]
198			}
199
200			# and all this just because we cannot iterate over
201			# all maps in C++...
202			sub cf::map::change_all_map_light {
203			my ($change) = @_;
204
205			$_->change_map_light ($change) for values %cf::MAP;
206			}
207
208			sub try_load_header($) {
209			my ($path) = @_;
210
211			utf8::encode $path;
212			aio_open $path, O_RDONLY, 0
213			or return;
214
215			my $map = cf::map::new
216			or return;
217
218			$map->load_header ($path)
219			or return;
220
221			$map->reset_time (0) if $map->reset_time > $cf::RUNTIME;
222			$map->reset_timeout (10);#d#
223
224			$map->{load_path} = $path;
225
226			$map
227			}
228
229			sub cf::map::find_map_nb {
230			my ($path, $origin) = @_;
231
232	root	1.3	warn "find_map_nb<$path,$origin>\n";#d#
233
234	root	1.1	$path = ref $path ? $path : new cf::path $path, $origin && $origin->path;
235			my $key = $path->as_string;
236
237			$cf::MAP{$key} \|\| do {
238			# do it the slow way
239			my $map = try_load_header $path->save_path;
240
241			if (!$map) {
242			$map = try_load_header $path->load_path
243			or return;
244			}
245
246			$map or return;
247
248			$map->instantiate;
249			$map->path ($key);
250			$map->{path} = $path;
251
252	root	1.3	$map->per_player (0) if $path->{user_rel};
253
254	root	1.1	$map->reset if $map->should_reset;
255
256			$cf::MAP{$key} = $map
257			}
258			}
259
260			sub cf::map::find_map {
261			my ($path, $origin) = @_;
262
263			$path = new cf::path $path, $origin && $origin->path;
264			my $key = $path->as_string;
265
266			warn "find_map<$path,$origin>\n";#d#
267
268			$cf::MAP{$key} \|\| sync_job {
269			cf::map::find_map_nb $path;
270			}
271			}
272
273			sub cf::map::do_load_nb {
274			my ($self) = @_;
275
276			return 0 unless $self->in_memory == cf::MAP_SWAPPED;
277
278			$self->in_memory (cf::MAP_LOADING);
279
280			my $path = $self->{path};
281
282			$self->alloc;
283			$self->load_objects ($self->{load_path}, 1)
284			or return;
285
286			if (my $uniq = $path->uniq_path) {
287			utf8::encode $uniq;
288			if (aio_open $uniq, O_RDONLY, 0) {
289			$self->clear_unique_items;
290			$self->load_objects ($uniq, 0);
291			}
292			}
293
294			# now do the right thing for maps
295			$self->link_multipart_objects;
296			$self->fix_auto_apply;
297			$self->decay_objects;
298			$self->update_buttons;
299			$self->set_darkness_map;
300			$self->difficulty ($self->estimate_difficulty)
301			unless $self->difficulty;
302	elmex	1.5	$self->activate;
303	root	1.1
304			$self->in_memory (cf::MAP_IN_MEMORY);
305			}
306
307			sub cf::map::do_load {
308			my ($self) = @_;
309
310			warn "do_load<$self>\n";#d#
311
312			sync_job {
313			cf::map::do_load_nb $self;
314			};
315			}
316
317			sub cf::map::save {
318			my ($self) = @_;
319
320			warn "saving map ", $self->path;
321
322			my $save = $self->{path}->save_path; utf8::encode $save;
323			my $uniq = $self->{path}->uniq_path; utf8::encode $uniq;
324
325			if ($uniq) {
326			$self->save_objects ($save, cf::IO_HEADER \| cf::IO_OBJECTS);
327			$self->save_objects ($uniq, cf::IO_UNIQUES);
328			} else {
329			$self->save_objects ($save, cf::IO_HEADER \| cf::IO_OBJECTS \| cf::IO_UNIQUES);
330			}
331
332			$self->{load_path} = $save;
333			$self->{last_save} = $cf::RUNTIME;
334			}
335
336	root	1.2	sub cf::map::swap_out {
337			my ($self) = @_;
338
339	root	1.3	$self->save if $self->in_memory == cf::MAP_IN_MEMORY;
340	root	1.2	$self->clear;
341			$self->in_memory (cf::MAP_SWAPPED);
342			}
343
344	root	1.1	sub cf::map::should_reset {
345			my ($map) = @_;
346
347			# TODO: safety, remove and allow resettable per-player maps
348			return if $map->{path}{user_rel};#d#
349			return if $map->per_player;
350			return unless $map->reset_timeout;
351
352			my $time = $map->fixed_resettime ? $map->reset_time : $map->last_access;
353
354			$time + $map->reset_timeout < $cf::RUNTIME
355			}
356
357			sub cf::map::reset {
358			my ($self) = @_;
359
360			return if $self->players;
361	root	1.3	return if $self->{path}{user_rel};#d#
362	root	1.1
363			warn "resetting map ", $self->path;#d#
364	root	1.3
365			utf8::encode (my $save = $self->{path}->save_path);
366			aioreq_pri 3; IO::AIO::aio_unlink $save;
367			aioreq_pri 3; IO::AIO::aio_unlink "$save.pst";
368	root	1.1
369			$self->clear;
370			$self->in_memory (cf::MAP_SWAPPED);
371	root	1.3	utf8::encode ($self->{load_path} = $self->{path}->load_path);
372	root	1.1	}
373
374			sub cf::object::player::enter_exit {
375			my ($ob, $exit) = @_;
376
377	root	1.4	# if at login, move to interim map immediately
378			unless ($exit) {
379			# used on login only
380			$ob->enter_map ($LINK_MAP, 0, 0);
381			}
382
383			#TODO: do this in the background, freeze the player if required
384	root	1.1	sync_job {
385	root	1.3	my ($map, $x, $y);
386	root	1.1
387	root	1.4	unless ($exit) {
388			# used on login only(?)
389			$map = cf::map::find_map_nb $ob->contr->maplevel;
390			($x, $y) = ($ob->x, $ob->y);
391			} else {
392	root	1.1	my $path = new cf::path $exit->slaying, $exit->map && $exit->map->path;
393
394	root	1.3	$map = cf::map::find_map_nb $path->as_string;
395	root	1.1	$map = $map->customise_for ($ob) if $map;
396	root	1.3	($x, $y) = ($exit->stats->hp, $exit->stats->sp);
397	root	1.4	}
398	root	1.1
399	root	1.4	unless ($map) {
400			$map = cf::map::find_map_nb $emergency_position->[0]
401			or die "FATAL: cannot load emergency map\n";
402			$x = $emergency_position->[1];
403			$y = $emergency_position->[2];
404	root	1.3	}
405	root	1.1
406	root	1.3	if ($map) {
407			warn "entering ", $map->path, " at ($x, $y)\n";#d#
408	root	1.1	$map->do_load_nb;
409			$ob->enter_map ($map, $x, $y);
410	root	1.3	} else {
411			$ob->message ("The exit is closed", cf::NDI_UNIQUE \| cf::NDI_RED);
412	root	1.1	}
413			}
414			}
415
416			sub cf::map::customise_for {
417			my ($map, $ob) = @_;
418
419			if ($map->per_player) {
420			return cf::map::find_map_nb "~" . $ob->name . "/" . $map->{path}{path};
421			}
422
423			$map
424			}
425
426			sub cf::map::emergency_save {
427			local $cf::FREEZE = 1;
428
429	root	1.4	warn "enter emergency map save\n";
430
431			my $saver = async {
432			warn "begin emergency map save\n";
433			$_->save for values %cf::MAP;
434			};
435			$saver->prio (Coro::PRIO_MAX);
436			$saver->join;
437
438	root	1.1	warn "emergency map save drain\n";
439			Event::one_event while IO::AIO::nreqs;
440			warn "end emergency map save\n";
441			}
442