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Comparing deliantra/server/lib/cf.pm (file contents):
Revision 1.204 by root, Fri Feb 2 19:59:22 2007 UTC vs.
Revision 1.209 by root, Mon Feb 12 01:25:55 2007 UTC

… …
15use Coro::Timer; 15use Coro::Timer;
16use Coro::Signal; 16use Coro::Signal;
17use Coro::Semaphore; 17use Coro::Semaphore;
18use Coro::AIO; 18use Coro::AIO;
19 19
20use BDB ();
20use Data::Dumper; 21use Data::Dumper;
21use Digest::MD5; 22use Digest::MD5;
22use Fcntl; 23use Fcntl;
23use IO::AIO 2.32 (); 24use IO::AIO 2.32 ();
24use YAML::Syck (); 25use YAML::Syck ();
25use Time::HiRes; 26use Time::HiRes;
27use Compress::LZF;
28
29Compress::LZF::sfreeze_cr { }; # prime Compress::LZF so it does not use require later
26 30
27use 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
28 32
29sub WF_AUTOCANCEL () { 1 } # automatically cancel this watcher on reload 33sub WF_AUTOCANCEL () { 1 } # automatically cancel this watcher on reload
30 34
… …
48our $TICK_WATCHER; 52our $TICK_WATCHER;
49our $AIO_POLL_WATCHER; 53our $AIO_POLL_WATCHER;
50our $WRITE_RUNTIME_WATCHER; 54our $WRITE_RUNTIME_WATCHER;
51our $NEXT_TICK; 55our $NEXT_TICK;
52our $NOW; 56our $NOW;
53our $USE_FSYNC; # use fsync to write maps - default off 57our $USE_FSYNC = 1; # use fsync to write maps - default off
58
59our $BDB_POLL_WATCHER;
60our $DB_ENV;
54 61
55our %CFG; 62our %CFG;
56 63
57our $UPTIME; $UPTIME ||= time; 64our $UPTIME; $UPTIME ||= time;
58our $RUNTIME; 65our $RUNTIME;
59 66
60our %PLAYER; # all users 67our %PLAYER; # all users
61our %MAP; # all maps 68our %MAP; # all maps
62our $LINK_MAP; # the special {link} map, which is always available 69our $LINK_MAP; # the special {link} map, which is always available
63our $RANDOM_MAPS = cf::localdir . "/random"; 70our $RANDOM_MAPS = cf::localdir . "/random";
71our $BDB_ENV_DIR = cf::localdir . "/db";
64 72
65our $WAIT_FOR_TICK; $WAIT_FOR_TICK ||= new Coro::Signal; 73our $WAIT_FOR_TICK; $WAIT_FOR_TICK ||= new Coro::Signal;
66our $WAIT_FOR_TICK_ONE; $WAIT_FOR_TICK_ONE ||= new Coro::Signal; 74our $WAIT_FOR_TICK_ONE; $WAIT_FOR_TICK_ONE ||= new Coro::Signal;
67 75
68# used to convert map paths into valid unix filenames by replacing / by ∕ 76# used to convert map paths into valid unix filenames by replacing / by ∕
… …
81mkdir cf::localdir; 89mkdir cf::localdir;
82mkdir cf::localdir . "/" . cf::playerdir; 90mkdir cf::localdir . "/" . cf::playerdir;
83mkdir cf::localdir . "/" . cf::tmpdir; 91mkdir cf::localdir . "/" . cf::tmpdir;
84mkdir cf::localdir . "/" . cf::uniquedir; 92mkdir cf::localdir . "/" . cf::uniquedir;
85mkdir $RANDOM_MAPS; 93mkdir $RANDOM_MAPS;
94mkdir $BDB_ENV_DIR;
86 95
87our $EMERGENCY_POSITION; 96our $EMERGENCY_POSITION;
88 97
89sub cf::map::normalise; 98sub cf::map::normalise;
90 99
… …
2176The parameter C<$family> should best start with the name of the extension 2185The parameter C<$family> should best start with the name of the extension
2177using it, it should be unique. 2186using it, it should be unique.
2178 2187
2179=over 4 2188=over 4
2180 2189
2181=item $hashref = cf::db_get $family
2182
2183Return a hashref for use by the extension C<$family>, which can be
2184modified. After modifications, you have to call C<cf::db_dirty> or
2185C<cf::db_sync>.
2186
2187=item $value = cf::db_get $family => $key 2190=item $value = cf::db_get $family => $key
2188 2191
2189Returns a single value from the database 2192Returns a single value from the database.
2190
2191=item cf::db_put $family => $hashref
2192
2193Stores the given family hashref into the database. Updates are delayed, if
2194you want the data to be synced to disk immediately, use C<cf::db_sync>.
2195 2193
2196=item cf::db_put $family => $key => $value 2194=item cf::db_put $family => $key => $value
2197 2195
2198Stores the given C<$value> in the family hash. Updates are delayed, if you 2196Stores the given C<$value> in the family.
2199want the data to be synced to disk immediately, use C<cf::db_sync>.
2200
2201=item cf::db_dirty
2202
2203Marks the database as dirty, to be updated at a later time.
2204
2205=item cf::db_sync
2206
2207Immediately write the database to disk I<if it is dirty>.
2208 2197
2209=cut 2198=cut
2210 2199
2211our $DB; 2200our $DB;
2212 2201
2213{ 2202unless ($DB) {
2203 $DB = BDB::db_create $DB_ENV;
2204
2205 cf::sync_job {
2206 eval {
2207 $DB->set_flags (BDB::CHKSUM);
2208
2209 BDB::db_open $DB, undef, "db", undef, BDB::BTREE,
2210 BDB::CREATE | BDB::AUTO_COMMIT, 0666;
2211 cf::cleanup "db_open(db): $!" if $!;
2212 };
2213 cf::cleanup "db_open(db): $@" if $@;
2214 };
2215
2214 my $path = cf::localdir . "/database.pst"; 2216 my $path = cf::localdir . "/database.pst";
2217 if (stat $path) {
2218 cf::sync_job {
2219 my $pst = Storable::retrieve $path;
2215 2220
2216 sub db_load() { 2221 cf::db_put (board => data => $pst->{board});
2217 $DB = stat $path ? Storable::retrieve $path : { }; 2222 cf::db_put (guildrules => data => $pst->{guildrules});
2218 } 2223 cf::db_put (rent => balance => $pst->{rent}{balance});
2224 BDB::db_env_txn_checkpoint $DB_ENV;
2219 2225
2220 my $pid; 2226 unlink $path;
2221
2222 sub db_save() {
2223 waitpid $pid, 0 if $pid;
2224 if (0 == ($pid = fork)) {
2225 $DB->{_meta}{version} = 1;
2226 Storable::nstore $DB, "$path~";
2227 rename "$path~", $path;
2228 cf::_exit 0 if defined $pid;
2229 } 2227 };
2230 } 2228 }
2229}
2231 2230
2232 my $dirty;
2233
2234 sub db_sync() {
2235 db_save if $dirty;
2236 undef $dirty;
2237 }
2238
2239 my $idle = Event->idle (
2240 reentrant => 0,
2241 min => 10,
2242 max => 20,
2243 repeat => 0,
2244 data => WF_AUTOCANCEL,
2245 cb => \&db_sync,
2246 );
2247
2248 sub db_dirty() {
2249 $dirty = 1;
2250 $idle->start;
2251 }
2252
2253 sub db_get($;$) { 2231sub db_get($$) {
2254 @_ >= 2 2232 my $key = "$_[0]/$_[1]";
2255 ? $DB->{$_[0]}{$_[1]}
2256 : ($DB->{$_[0]} ||= { })
2257 }
2258 2233
2234 cf::sync_job {
2235 BDB::db_get $DB, undef, $key, my $data;
2236
2237 $! ? ()
2238 : Compress::LZF::sthaw $data
2239 }
2240}
2241
2259 sub db_put($$;$) { 2242sub db_put($$$) {
2260 if (@_ >= 3) { 2243 BDB::dbreq_pri 4;
2261 $DB->{$_[0]}{$_[1]} = $_[2]; 2244 BDB::db_put $DB, undef, "$_[0]/$_[1]", Compress::LZF::sfreeze_cr $_[2], 0, sub { };
2262 } else {
2263 $DB->{$_[0]} = $_[1];
2264 }
2265 db_dirty;
2266 }
2267
2268 cf::global->attach (
2269 prio => 10000,
2270 on_cleanup => sub {
2271 db_sync;
2272 },
2273 );
2274} 2245}
2275 2246
2276############################################################################# 2247#############################################################################
2277# the server's init and main functions 2248# the server's init and main functions
2278 2249
… …
2314 Event::one_event; 2285 Event::one_event;
2315 })->prio (Coro::PRIO_MAX); 2286 })->prio (Coro::PRIO_MAX);
2316 }; 2287 };
2317 2288
2318 cfg_load; 2289 cfg_load;
2319 db_load;
2320 load_extensions; 2290 load_extensions;
2321 2291
2322 $TICK_WATCHER->start; 2292 $TICK_WATCHER->start;
2323 Event::loop; 2293 Event::loop;
2324} 2294}
… …
2363 my $map = $cf::MAP{$path} or next; 2333 my $map = $cf::MAP{$path} or next;
2364 $map->valid or next; 2334 $map->valid or next;
2365 $map->save; 2335 $map->save;
2366 } 2336 }
2367 warn "end emergency map save\n"; 2337 warn "end emergency map save\n";
2338
2339 warn "begin emergency database checkpoint\n";
2340 BDB::db_env_txn_checkpoint $DB_ENV;
2341 warn "end emergency database checkpoint\n";
2368 }; 2342 };
2369 2343
2370 warn "leave emergency perl save\n"; 2344 warn "leave emergency perl save\n";
2371} 2345}
2372 2346
… …
2385 cf::emergency_save; 2359 cf::emergency_save;
2386 2360
2387 eval { 2361 eval {
2388 # if anything goes wrong in here, we should simply crash as we already saved 2362 # if anything goes wrong in here, we should simply crash as we already saved
2389 2363
2390 warn "syncing database to disk";
2391 cf::db_sync;
2392
2393 warn "cancelling all WF_AUTOCANCEL watchers"; 2364 warn "cancelling all WF_AUTOCANCEL watchers";
2394 for (Event::all_watchers) { 2365 for (Event::all_watchers) {
2395 $_->cancel if $_->data & WF_AUTOCANCEL; 2366 $_->cancel if $_->data & WF_AUTOCANCEL;
2396 } 2367 }
2397 2368
2369 warn "syncing database to disk";
2370 BDB::db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
2371
2398 warn "flushing outstanding aio requests"; 2372 warn "flushing outstanding aio requests";
2399 for (;;) { 2373 for (;;) {
2374 BDB::flush;
2400 IO::AIO::flush; 2375 IO::AIO::flush;
2401 Coro::cede; 2376 Coro::cede;
2402 last unless IO::AIO::nreqs; 2377 last unless IO::AIO::nreqs || BDB::nreqs;
2403 warn "iterate..."; 2378 warn "iterate...";
2404 } 2379 }
2405 2380
2406 warn "cancelling all extension coros"; 2381 warn "cancelling all extension coros";
2407 $_->cancel for values %EXT_CORO; 2382 $_->cancel for values %EXT_CORO;
… …
2462 require cf; 2437 require cf;
2463 cf::_connect_to_perl; # nominally unnecessary, but cannot hurt 2438 cf::_connect_to_perl; # nominally unnecessary, but cannot hurt
2464 2439
2465 warn "loading config and database again"; 2440 warn "loading config and database again";
2466 cf::cfg_load; 2441 cf::cfg_load;
2467 cf::db_load;
2468 2442
2469 warn "loading extensions"; 2443 warn "loading extensions";
2470 cf::load_extensions; 2444 cf::load_extensions;
2471 2445
2472 warn "reattaching attachments to objects/players"; 2446 warn "reattaching attachments to objects/players";
… …
2552 $TICK_WATCHER->at ($NEXT_TICK); 2526 $TICK_WATCHER->at ($NEXT_TICK);
2553 $TICK_WATCHER->start; 2527 $TICK_WATCHER->start;
2554 }, 2528 },
2555); 2529);
2556 2530
2531{
2532 BDB::max_poll_time $TICK * 0.1;
2533 $BDB_POLL_WATCHER = Event->io (
2534 reentrant => 0,
2535 fd => BDB::poll_fileno,
2536 poll => 'r',
2537 prio => 0,
2538 data => WF_AUTOCANCEL,
2539 cb => \&BDB::poll_cb,
2540 );
2541 BDB::min_parallel 8;
2542
2543 BDB::set_sync_prepare {
2544 my $status;
2545 my $current = $Coro::current;
2546 (
2547 sub {
2548 $status = $!;
2549 $current->ready; undef $current;
2550 },
2551 sub {
2552 Coro::schedule while defined $current;
2553 $! = $status;
2554 },
2555 )
2556 };
2557
2558 unless ($DB_ENV) {
2559 $DB_ENV = BDB::db_env_create;
2560
2561 cf::sync_job {
2562 eval {
2563 BDB::db_env_open
2564 $DB_ENV,
2565 $BDB_ENV_DIR,
2566 BDB::INIT_LOCK | BDB::INIT_LOG | BDB::INIT_MPOOL | BDB::INIT_TXN
2567 | BDB::RECOVER | BDB::REGISTER | BDB::USE_ENVIRON | BDB::CREATE,
2568 0666;
2569
2570 cf::cleanup "db_env_open($BDB_ENV_DIR): $!" if $!;
2571
2572 $DB_ENV->set_flags (BDB::AUTO_COMMIT | BDB::REGION_INIT | BDB::TXN_NOSYNC, 1);
2573 $DB_ENV->set_lk_detect;
2574 };
2575
2576 cf::cleanup "db_env_open(db): $@" if $@;
2577 };
2578 }
2579}
2580
2581{
2582 IO::AIO::min_parallel 8;
2583
2584 undef $Coro::AIO::WATCHER;
2557IO::AIO::max_poll_time $TICK * 0.1; 2585 IO::AIO::max_poll_time $TICK * 0.1;
2558
2559undef $Coro::AIO::WATCHER;
2560$AIO_POLL_WATCHER = Event->io ( 2586 $AIO_POLL_WATCHER = Event->io (
2561 reentrant => 0, 2587 reentrant => 0,
2562 fd => IO::AIO::poll_fileno, 2588 fd => IO::AIO::poll_fileno,
2563 poll => 'r', 2589 poll => 'r',
2564 prio => 6, 2590 prio => 6,
2565 data => WF_AUTOCANCEL, 2591 data => WF_AUTOCANCEL,
2566 cb => \&IO::AIO::poll_cb, 2592 cb => \&IO::AIO::poll_cb,
2567); 2593 );
2594}
2568 2595
2569$WRITE_RUNTIME_WATCHER = Event->timer ( 2596$WRITE_RUNTIME_WATCHER = Event->timer (
2570 reentrant => 0, 2597 reentrant => 0,
2571 data => WF_AUTOCANCEL, 2598 data => WF_AUTOCANCEL,
2572 after => 1, 2599 after => 1,

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