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Comparing deliantra/server/lib/cf.pm (file contents):
Revision 1.207 by root, Sun Feb 11 22:42:09 2007 UTC vs.
Revision 1.214 by root, Wed Feb 14 00:40:05 2007 UTC

… …
22use Digest::MD5; 22use Digest::MD5;
23use Fcntl; 23use Fcntl;
24use IO::AIO 2.32 (); 24use IO::AIO 2.32 ();
25use YAML::Syck (); 25use YAML::Syck ();
26use Time::HiRes; 26use Time::HiRes;
27use Compress::LZF;
28
29Compress::LZF::sfreeze_cr { }; # prime Compress::LZF so it does not use require later
27 30
28use Event; $Event::Eval = 1; # no idea why this is required, but it is 31use Event; $Event::Eval = 1; # no idea why this is required, but it is
29 32
30sub WF_AUTOCANCEL () { 1 } # automatically cancel this watcher on reload 33sub WF_AUTOCANCEL () { 1 } # automatically cancel this watcher on reload
31 34
… …
46our $LIBDIR = datadir . "/ext"; 49our $LIBDIR = datadir . "/ext";
47 50
48our $TICK = MAX_TIME * 1e-6; 51our $TICK = MAX_TIME * 1e-6;
49our $TICK_WATCHER; 52our $TICK_WATCHER;
50our $AIO_POLL_WATCHER; 53our $AIO_POLL_WATCHER;
51our $WRITE_RUNTIME_WATCHER; 54our $NEXT_RUNTIME_WRITE; # when should the runtime file be written
52our $NEXT_TICK; 55our $NEXT_TICK;
53our $NOW; 56our $NOW;
54our $USE_FSYNC = 1; # use fsync to write maps - default off 57our $USE_FSYNC = 1; # use fsync to write maps - default off
55 58
56our $BDB_POLL_WATCHER; 59our $BDB_POLL_WATCHER;
… …
270sub freeze_mainloop { 273sub freeze_mainloop {
271 return unless $TICK_WATCHER->is_active; 274 return unless $TICK_WATCHER->is_active;
272 275
273 my $guard = Coro::guard { 276 my $guard = Coro::guard {
274 $TICK_WATCHER->start; 277 $TICK_WATCHER->start;
275 $WRITE_RUNTIME_WATCHER->start;
276 }; 278 };
277 $WRITE_RUNTIME_WATCHER->stop;
278 $TICK_WATCHER->stop; 279 $TICK_WATCHER->stop;
279 $guard 280 $guard
280} 281}
281 282
282=item cf::async { BLOCK } 283=item cf::async { BLOCK }
… …
1606 return if $self->players; 1607 return if $self->players;
1607 return if $self->isa ("ext::map_per_player");#d# 1608 return if $self->isa ("ext::map_per_player");#d#
1608 1609
1609 warn "resetting map ", $self->path;#d# 1610 warn "resetting map ", $self->path;#d#
1610 1611
1612 $self->in_memory (cf::MAP_SWAPPED);
1613
1614 # need to save uniques path
1615 unless ($self->{deny_save}) {
1616 my $uniq = $self->uniq_path; utf8::encode $uniq;
1617
1618 $self->_save_objects ($uniq, cf::IO_UNIQUES)
1619 if $uniq;
1620 }
1621
1611 delete $cf::MAP{$self->path}; 1622 delete $cf::MAP{$self->path};
1612 1623
1613 $self->in_memory (cf::MAP_SWAPPED);
1614 $self->clear; 1624 $self->clear;
1615 1625
1616 $_->clear_links_to ($self) for values %cf::MAP; 1626 $_->clear_links_to ($self) for values %cf::MAP;
1617 1627
1618 $self->unlink_save; 1628 $self->unlink_save;
… …
2182The parameter C<$family> should best start with the name of the extension 2192The parameter C<$family> should best start with the name of the extension
2183using it, it should be unique. 2193using it, it should be unique.
2184 2194
2185=over 4 2195=over 4
2186 2196
2187=item $hashref = cf::db_get $family
2188
2189Return a hashref for use by the extension C<$family>, which can be
2190modified. After modifications, you have to call C<cf::db_dirty> or
2191C<cf::db_sync>.
2192
2193=item $value = cf::db_get $family => $key 2197=item $value = cf::db_get $family => $key
2194 2198
2195Returns a single value from the database 2199Returns a single value from the database.
2196
2197=item cf::db_put $family => $hashref
2198
2199Stores the given family hashref into the database. Updates are delayed, if
2200you want the data to be synced to disk immediately, use C<cf::db_sync>.
2201 2200
2202=item cf::db_put $family => $key => $value 2201=item cf::db_put $family => $key => $value
2203 2202
2204Stores the given C<$value> in the family hash. Updates are delayed, if you 2203Stores the given C<$value> in the family.
2205want the data to be synced to disk immediately, use C<cf::db_sync>.
2206
2207=item cf::db_dirty
2208
2209Marks the database as dirty, to be updated at a later time.
2210
2211=item cf::db_sync
2212
2213Immediately write the database to disk I<if it is dirty>.
2214 2204
2215=cut 2205=cut
2216 2206
2217our $DB; 2207our $DB;
2218 2208
2219{ 2209sub db_init {
2210 unless ($DB) {
2211 $DB = BDB::db_create $DB_ENV;
2212
2213 cf::sync_job {
2214 eval {
2215 $DB->set_flags (BDB::CHKSUM);
2216
2217 BDB::db_open $DB, undef, "db", undef, BDB::BTREE,
2218 BDB::CREATE | BDB::AUTO_COMMIT, 0666;
2219 cf::cleanup "db_open(db): $!" if $!;
2220 };
2221 cf::cleanup "db_open(db): $@" if $@;
2222 };
2223
2220 my $path = cf::localdir . "/database.pst"; 2224 my $path = cf::localdir . "/database.pst";
2225 if (stat $path) {
2226 cf::sync_job {
2227 my $pst = Storable::retrieve $path;
2221 2228
2222 sub db_load() { 2229 cf::db_put (board => data => $pst->{board});
2223 $DB = stat $path ? Storable::retrieve $path : { }; 2230 cf::db_put (guildrules => data => $pst->{guildrules});
2224 } 2231 cf::db_put (rent => balance => $pst->{rent}{balance});
2232 BDB::db_env_txn_checkpoint $DB_ENV;
2225 2233
2226 my $pid; 2234 unlink $path;
2227
2228 sub db_save() {
2229 waitpid $pid, 0 if $pid;
2230 if (0 == ($pid = fork)) {
2231 $DB->{_meta}{version} = 1;
2232 Storable::nstore $DB, "$path~";
2233 rename "$path~", $path;
2234 cf::_exit 0 if defined $pid;
2235 } 2235 };
2236 }
2237
2238 my $dirty;
2239
2240 sub db_sync() {
2241 db_save if $dirty;
2242 undef $dirty;
2243 }
2244
2245 my $idle = Event->idle (
2246 reentrant => 0,
2247 min => 10,
2248 max => 20,
2249 repeat => 0,
2250 data => WF_AUTOCANCEL,
2251 cb => \&db_sync,
2252 );
2253
2254 sub db_dirty() {
2255 $dirty = 1;
2256 $idle->start;
2257 }
2258
2259 sub db_get($;$) {
2260 @_ >= 2
2261 ? $DB->{$_[0]}{$_[1]}
2262 : ($DB->{$_[0]} ||= { })
2263 }
2264
2265 sub db_put($$;$) {
2266 if (@_ >= 3) {
2267 $DB->{$_[0]}{$_[1]} = $_[2];
2268 } else {
2269 $DB->{$_[0]} = $_[1];
2270 }
2271 db_dirty;
2272 }
2273
2274 cf::global->attach (
2275 prio => 10000,
2276 on_cleanup => sub {
2277 db_sync;
2278 }, 2236 }
2279 ); 2237 }
2238}
2239
2240sub db_get($$) {
2241 my $key = "$_[0]/$_[1]";
2242
2243 cf::sync_job {
2244 BDB::db_get $DB, undef, $key, my $data;
2245
2246 $! ? ()
2247 : Compress::LZF::sthaw $data
2248 }
2249}
2250
2251sub db_put($$$) {
2252 BDB::dbreq_pri 4;
2253 BDB::db_put $DB, undef, "$_[0]/$_[1]", Compress::LZF::sfreeze_cr $_[2], 0, sub { };
2280} 2254}
2281 2255
2282############################################################################# 2256#############################################################################
2283# the server's init and main functions 2257# the server's init and main functions
2284 2258
… …
2320 Event::one_event; 2294 Event::one_event;
2321 })->prio (Coro::PRIO_MAX); 2295 })->prio (Coro::PRIO_MAX);
2322 }; 2296 };
2323 2297
2324 cfg_load; 2298 cfg_load;
2325 db_load; 2299 db_init;
2326 load_extensions; 2300 load_extensions;
2327 2301
2328 $TICK_WATCHER->start; 2302 $TICK_WATCHER->start;
2329 Event::loop; 2303 Event::loop;
2330} 2304}
… …
2369 my $map = $cf::MAP{$path} or next; 2343 my $map = $cf::MAP{$path} or next;
2370 $map->valid or next; 2344 $map->valid or next;
2371 $map->save; 2345 $map->save;
2372 } 2346 }
2373 warn "end emergency map save\n"; 2347 warn "end emergency map save\n";
2348
2349 warn "begin emergency database checkpoint\n";
2350 BDB::db_env_txn_checkpoint $DB_ENV;
2351 warn "end emergency database checkpoint\n";
2374 }; 2352 };
2375 2353
2376 warn "leave emergency perl save\n"; 2354 warn "leave emergency perl save\n";
2355}
2356
2357sub post_cleanup {
2358 my ($make_core) = @_;
2359
2360 warn Carp::longmess "post_cleanup backtrace"
2361 if $make_core;
2377} 2362}
2378 2363
2379sub reload() { 2364sub reload() {
2380 # can/must only be called in main 2365 # can/must only be called in main
2381 if ($Coro::current != $Coro::main) { 2366 if ($Coro::current != $Coro::main) {
… …
2383 return; 2368 return;
2384 } 2369 }
2385 2370
2386 warn "reloading..."; 2371 warn "reloading...";
2387 2372
2388 warn "cancelling server ticker"; 2373 warn "entering sync_job";
2389 $TICK_WATCHER->cancel;
2390 2374
2375 cf::sync_job {
2376 cf::write_runtime; # external watchdog should not bark
2391 cf::emergency_save; 2377 cf::emergency_save;
2378 cf::write_runtime; # external watchdog should not bark
2392 2379
2393 eval { 2380 warn "syncing database to disk";
2381 BDB::db_env_txn_checkpoint $DB_ENV;
2382
2394 # if anything goes wrong in here, we should simply crash as we already saved 2383 # if anything goes wrong in here, we should simply crash as we already saved
2395
2396 warn "syncing database to disk";
2397 cf::db_sync;
2398 2384
2399 warn "cancelling all WF_AUTOCANCEL watchers"; 2385 warn "cancelling all WF_AUTOCANCEL watchers";
2400 for (Event::all_watchers) { 2386 for (Event::all_watchers) {
2401 $_->cancel if $_->data & WF_AUTOCANCEL; 2387 $_->cancel if $_->data & WF_AUTOCANCEL;
2402 } 2388 }
2403 2389
2404 warn "flushing outstanding aio requests"; 2390 warn "flushing outstanding aio requests";
2405 for (;;) { 2391 for (;;) {
2392 BDB::flush;
2406 IO::AIO::flush; 2393 IO::AIO::flush;
2407 Coro::cede; 2394 Coro::cede;
2408 last unless IO::AIO::nreqs; 2395 last unless IO::AIO::nreqs || BDB::nreqs;
2409 warn "iterate..."; 2396 warn "iterate...";
2410 } 2397 }
2411 2398
2412 warn "cancelling all extension coros"; 2399 warn "cancelling all extension coros";
2413 $_->cancel for values %EXT_CORO; 2400 $_->cancel for values %EXT_CORO;
… …
2468 require cf; 2455 require cf;
2469 cf::_connect_to_perl; # nominally unnecessary, but cannot hurt 2456 cf::_connect_to_perl; # nominally unnecessary, but cannot hurt
2470 2457
2471 warn "loading config and database again"; 2458 warn "loading config and database again";
2472 cf::cfg_load; 2459 cf::cfg_load;
2473 cf::db_load;
2474 2460
2475 warn "loading extensions"; 2461 warn "loading extensions";
2476 cf::load_extensions; 2462 cf::load_extensions;
2477 2463
2478 warn "reattaching attachments to objects/players"; 2464 warn "reattaching attachments to objects/players";
… …
2481 reattach $_ for values %MAP; 2467 reattach $_ for values %MAP;
2482 2468
2483 warn "loading reloadable resources"; 2469 warn "loading reloadable resources";
2484 load_resources; 2470 load_resources;
2485 2471
2486 warn "restarting server ticker"; 2472 warn "leaving sync_job";
2487 2473
2488 $TICK_WATCHER->start; 2474 1
2489 }; 2475 } or do {
2490
2491 if ($@) {
2492 warn $@; 2476 warn $@;
2493 warn "error while reloading, exiting."; 2477 warn "error while reloading, exiting.";
2494 exit 1; 2478 exit 1;
2495 } 2479 };
2496 2480
2497 warn "reloaded"; 2481 warn "reloaded";
2498}; 2482};
2499 2483
2500our $RELOAD_WATCHER; # used only during reload 2484our $RELOAD_WATCHER; # used only during reload
… …
2541 2525
2542 cf::server_tick; # one server iteration 2526 cf::server_tick; # one server iteration
2543 $RUNTIME += $TICK; 2527 $RUNTIME += $TICK;
2544 $NEXT_TICK += $TICK; 2528 $NEXT_TICK += $TICK;
2545 2529
2530 if ($NOW >= $NEXT_RUNTIME_WRITE) {
2531 $NEXT_RUNTIME_WRITE = $NOW + 10;
2532 Coro::async_pool {
2533 write_runtime
2534 or warn "ERROR: unable to write runtime file: $!";
2535 };
2536 }
2537
2538
2546 $WAIT_FOR_TICK->broadcast; 2539 $WAIT_FOR_TICK->broadcast;
2547 $WAIT_FOR_TICK_ONE->send if $WAIT_FOR_TICK_ONE->awaited; 2540 $WAIT_FOR_TICK_ONE->send if $WAIT_FOR_TICK_ONE->awaited;
2548 2541
2549 Event::sweep;
2550 Coro::cede_notself;
2551
2552# my $AFTER = Event::time; 2542# my $AFTER = Event::time;
2553# warn $AFTER - $NOW;#d# 2543# warn $AFTER - $NOW;#d#
2554 2544
2555 # if we are delayed by four ticks or more, skip them all 2545 # if we are delayed by four ticks or more, skip them all
2556 $NEXT_TICK = Event::time if Event::time >= $NEXT_TICK + $TICK * 4; 2546 $NEXT_TICK = Event::time if Event::time >= $NEXT_TICK + $TICK * 4;
… …
2589 2579
2590 unless ($DB_ENV) { 2580 unless ($DB_ENV) {
2591 $DB_ENV = BDB::db_env_create; 2581 $DB_ENV = BDB::db_env_create;
2592 2582
2593 cf::sync_job { 2583 cf::sync_job {
2584 eval {
2594 BDB::db_env_open 2585 BDB::db_env_open
2595 $DB_ENV, 2586 $DB_ENV,
2596 $BDB_ENV_DIR, 2587 $BDB_ENV_DIR,
2597 BDB::INIT_LOCK | BDB::INIT_LOG | BDB::INIT_MPOOL | BDB::INIT_TXN 2588 BDB::INIT_LOCK | BDB::INIT_LOG | BDB::INIT_MPOOL | BDB::INIT_TXN
2598 | BDB::RECOVER | BDB::REGISTER | BDB::USE_ENVIRON | BDB::CREATE, 2589 | BDB::RECOVER | BDB::REGISTER | BDB::USE_ENVIRON | BDB::CREATE,
2599 0666; 2590 0666;
2600 2591
2601 cf::cleanup "$!" if $!; 2592 cf::cleanup "db_env_open($BDB_ENV_DIR): $!" if $!;
2602 2593
2603 $DB_ENV->set_flags (BDB::AUTO_COMMIT | BDB::REGION_INIT | BDB::TXN_NOSYNC, 1); 2594 $DB_ENV->set_flags (BDB::AUTO_COMMIT | BDB::REGION_INIT | BDB::TXN_NOSYNC, 1);
2604 $DB_ENV->set_lk_detect; 2595 $DB_ENV->set_lk_detect;
2596 };
2597
2598 cf::cleanup "db_env_open(db): $@" if $@;
2605 }; 2599 };
2606 } 2600 }
2607} 2601}
2608 2602
2609{ 2603{
… …
2611 2605
2612 undef $Coro::AIO::WATCHER; 2606 undef $Coro::AIO::WATCHER;
2613 IO::AIO::max_poll_time $TICK * 0.1; 2607 IO::AIO::max_poll_time $TICK * 0.1;
2614 $AIO_POLL_WATCHER = Event->io ( 2608 $AIO_POLL_WATCHER = Event->io (
2615 reentrant => 0, 2609 reentrant => 0,
2610 data => WF_AUTOCANCEL,
2616 fd => IO::AIO::poll_fileno, 2611 fd => IO::AIO::poll_fileno,
2617 poll => 'r', 2612 poll => 'r',
2618 prio => 6, 2613 prio => 6,
2619 data => WF_AUTOCANCEL,
2620 cb => \&IO::AIO::poll_cb, 2614 cb => \&IO::AIO::poll_cb,
2621 ); 2615 );
2622} 2616}
2623 2617
2624$WRITE_RUNTIME_WATCHER = Event->timer (
2625 reentrant => 0,
2626 data => WF_AUTOCANCEL,
2627 after => 1,
2628 interval => 10,
2629 prio => 6, # keep it lowest so it acts like a watchdog
2630 cb => Coro::unblock_sub {
2631 write_runtime
2632 or warn "ERROR: unable to write runtime file: $!";
2633 },
2634);
2635
2636END { cf::emergency_save } 2618END { cf::emergency_save }
2637 2619
26381 26201
2639 2621

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